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/reducercommutativity/sum60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:25:47,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:25:47,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:25:47,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:25:47,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:25:47,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:25:47,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:25:47,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:25:47,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:25:47,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:25:47,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:25:47,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:25:47,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:25:47,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:25:47,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:25:47,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:25:47,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:25:47,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:25:47,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:25:47,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:25:47,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:25:47,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:25:47,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:25:47,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:25:47,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:25:47,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:25:47,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:25:47,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:25:47,954 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 03:25:47,976 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:25:47,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:25:47,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:25:47,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:25:47,979 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:25:47,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:25:47,979 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:25:47,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:25:47,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:25:47,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:25:47,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:25:47,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:25:47,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:25:47,982 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:25:47,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:25:47,982 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:25:47,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:25:47,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:25:47,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:25:47,983 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:25:47,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:25:47,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:25:47,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:25:47,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:25:47,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:25:47,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:25:47,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:25:47,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:25:47,985 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 03:25:48,263 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:25:48,276 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:25:48,280 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:25:48,282 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:25:48,282 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:25:48,283 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum60-2.i [2019-10-15 03:25:48,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/913256005/a2009df66b0b4f1b8efb0d6a7ab12954/FLAG4cc9e5b77 [2019-10-15 03:25:48,849 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:25:48,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum60-2.i [2019-10-15 03:25:48,856 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/913256005/a2009df66b0b4f1b8efb0d6a7ab12954/FLAG4cc9e5b77 [2019-10-15 03:25:49,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/913256005/a2009df66b0b4f1b8efb0d6a7ab12954 [2019-10-15 03:25:49,246 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:25:49,247 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:25:49,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:25:49,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:25:49,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:25:49,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:25:49" (1/1) ... [2019-10-15 03:25:49,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5014cfc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:49, skipping insertion in model container [2019-10-15 03:25:49,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:25:49" (1/1) ... [2019-10-15 03:25:49,273 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:25:49,290 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:25:49,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:25:49,492 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:25:49,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:25:49,613 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:25:49,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:49 WrapperNode [2019-10-15 03:25:49,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:25:49,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:25:49,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:25:49,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:25:49,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:49" (1/1) ... [2019-10-15 03:25:49,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:49" (1/1) ... [2019-10-15 03:25:49,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:49" (1/1) ... [2019-10-15 03:25:49,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:49" (1/1) ... [2019-10-15 03:25:49,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:49" (1/1) ... [2019-10-15 03:25:49,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:49" (1/1) ... [2019-10-15 03:25:49,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:49" (1/1) ... [2019-10-15 03:25:49,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:25:49,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:25:49,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:25:49,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:25:49,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:49" (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 03:25:49,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:25:49,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:25:49,728 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-10-15 03:25:49,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:25:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:25:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:25:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-10-15 03:25:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:25:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:25:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:25:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:25:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:25:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:25:49,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:25:50,120 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:25:50,120 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 03:25:50,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:25:50 BoogieIcfgContainer [2019-10-15 03:25:50,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:25:50,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:25:50,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:25:50,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:25:50,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:25:49" (1/3) ... [2019-10-15 03:25:50,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd06ffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:25:50, skipping insertion in model container [2019-10-15 03:25:50,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:49" (2/3) ... [2019-10-15 03:25:50,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd06ffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:25:50, skipping insertion in model container [2019-10-15 03:25:50,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:25:50" (3/3) ... [2019-10-15 03:25:50,131 INFO L109 eAbstractionObserver]: Analyzing ICFG sum60-2.i [2019-10-15 03:25:50,140 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:25:50,148 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:25:50,159 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:25:50,181 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:25:50,181 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:25:50,182 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:25:50,182 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:25:50,182 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:25:50,182 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:25:50,182 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:25:50,182 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:25:50,198 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 03:25:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 03:25:50,204 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:50,205 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 03:25:50,206 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:50,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:50,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1818423299, now seen corresponding path program 1 times [2019-10-15 03:25:50,218 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:50,218 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275942867] [2019-10-15 03:25:50,218 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:50,219 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:50,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:50,386 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 03:25:50,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275942867] [2019-10-15 03:25:50,388 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:25:50,388 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:25:50,389 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480769307] [2019-10-15 03:25:50,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:50,394 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:50,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:50,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:25:50,415 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 03:25:50,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:50,472 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-15 03:25:50,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:50,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 03:25:50,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:50,487 INFO L225 Difference]: With dead ends: 41 [2019-10-15 03:25:50,487 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 03:25:50,491 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 03:25:50,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 03:25:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 03:25:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 03:25:50,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 03:25:50,560 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-15 03:25:50,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:50,561 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 03:25:50,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 03:25:50,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 03:25:50,566 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:50,567 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 03:25:50,567 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:50,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:50,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2093950433, now seen corresponding path program 1 times [2019-10-15 03:25:50,569 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:50,570 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031269287] [2019-10-15 03:25:50,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:50,571 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:50,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:50,724 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 03:25:50,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031269287] [2019-10-15 03:25:50,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213297079] [2019-10-15 03:25:50,727 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 03:25:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:50,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:25:50,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:50,839 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 03:25:50,840 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:50,894 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 03:25:50,894 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:25:50,894 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 03:25:50,895 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200057619] [2019-10-15 03:25:50,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:50,897 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:50,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:50,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:25:50,898 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 03:25:50,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:50,913 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-15 03:25:50,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:50,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-15 03:25:50,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:50,916 INFO L225 Difference]: With dead ends: 33 [2019-10-15 03:25:50,917 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 03:25:50,918 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 03:25:50,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 03:25:50,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 03:25:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 03:25:50,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 03:25:50,927 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-15 03:25:50,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:50,927 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 03:25:50,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:50,928 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 03:25:50,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 03:25:50,929 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:50,929 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 03:25:51,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:51,135 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:51,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:51,136 INFO L82 PathProgramCache]: Analyzing trace with hash 903502258, now seen corresponding path program 1 times [2019-10-15 03:25:51,136 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:51,137 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892333545] [2019-10-15 03:25:51,137 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:51,138 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:51,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:51,259 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 03:25:51,260 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892333545] [2019-10-15 03:25:51,260 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:25:51,260 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:25:51,261 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739244531] [2019-10-15 03:25:51,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:51,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:51,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:51,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:25:51,262 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-15 03:25:51,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:51,273 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 03:25:51,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:51,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-15 03:25:51,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:51,275 INFO L225 Difference]: With dead ends: 31 [2019-10-15 03:25:51,275 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 03:25:51,276 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 03:25:51,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 03:25:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 03:25:51,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 03:25:51,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 03:25:51,282 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-15 03:25:51,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:51,284 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 03:25:51,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:51,285 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 03:25:51,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 03:25:51,286 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:51,286 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 03:25:51,286 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:51,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:51,287 INFO L82 PathProgramCache]: Analyzing trace with hash 2130547361, now seen corresponding path program 1 times [2019-10-15 03:25:51,287 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:51,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240233083] [2019-10-15 03:25:51,288 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:51,288 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:51,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:51,390 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 03:25:51,391 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240233083] [2019-10-15 03:25:51,391 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661838992] [2019-10-15 03:25:51,391 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 03:25:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:51,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:51,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:51,498 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 03:25:51,498 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:51,537 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 03:25:51,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [124695514] [2019-10-15 03:25:51,565 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:51,565 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:51,572 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:51,582 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:51,583 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:51,754 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:53,794 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:25:53,852 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:53,857 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:54,209 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:54,209 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 03:25:54,209 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974347714] [2019-10-15 03:25:54,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 03:25:54,212 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:54,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 03:25:54,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 03:25:54,213 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 18 states. [2019-10-15 03:25:56,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:56,930 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-10-15 03:25:56,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 03:25:56,931 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2019-10-15 03:25:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:56,932 INFO L225 Difference]: With dead ends: 40 [2019-10-15 03:25:56,932 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 03:25:56,933 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2019-10-15 03:25:56,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 03:25:56,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 03:25:56,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 03:25:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-15 03:25:56,940 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-10-15 03:25:56,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:56,940 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-15 03:25:56,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 03:25:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-15 03:25:56,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 03:25:56,942 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:56,942 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 03:25:57,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:57,146 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:57,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:57,146 INFO L82 PathProgramCache]: Analyzing trace with hash 356639231, now seen corresponding path program 2 times [2019-10-15 03:25:57,147 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:57,147 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656365449] [2019-10-15 03:25:57,147 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:57,148 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:57,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:57,243 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 03:25:57,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656365449] [2019-10-15 03:25:57,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321077786] [2019-10-15 03:25:57,244 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 03:25:57,332 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 03:25:57,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:57,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:57,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:57,358 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 03:25:57,358 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:57,390 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 03:25:57,391 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [331437990] [2019-10-15 03:25:57,393 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:57,393 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:57,394 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:57,394 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:57,396 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:57,427 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:59,257 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:25:59,310 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:59,314 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:59,701 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:59,702 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 11] total 21 [2019-10-15 03:25:59,702 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79392077] [2019-10-15 03:25:59,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 03:25:59,704 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:59,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 03:25:59,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-10-15 03:25:59,704 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 22 states. [2019-10-15 03:26:00,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:26:00,690 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-10-15 03:26:00,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 03:26:00,691 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2019-10-15 03:26:00,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:26:00,692 INFO L225 Difference]: With dead ends: 44 [2019-10-15 03:26:00,692 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 03:26:00,694 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 03:26:00,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 03:26:00,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-15 03:26:00,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 03:26:00,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-15 03:26:00,701 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-10-15 03:26:00,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:26:00,702 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-15 03:26:00,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 03:26:00,702 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-15 03:26:00,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 03:26:00,703 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:26:00,704 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 03:26:00,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:26:00,908 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:26:00,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:26:00,909 INFO L82 PathProgramCache]: Analyzing trace with hash 906031436, now seen corresponding path program 3 times [2019-10-15 03:26:00,910 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:26:00,910 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151000959] [2019-10-15 03:26:00,910 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:00,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:00,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:26:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:26:01,045 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 03:26:01,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151000959] [2019-10-15 03:26:01,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237551378] [2019-10-15 03:26:01,046 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 03:26:01,172 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:26:01,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:26:01,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 03:26:01,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:26:01,209 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 03:26:01,210 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:26:01,292 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 03:26:01,293 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [274075280] [2019-10-15 03:26:01,295 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:26:01,295 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:26:01,295 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:26:01,296 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:26:01,296 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:26:01,316 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:26:02,785 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:26:02,808 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:26:02,811 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:26:03,186 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:26:03,187 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-15 03:26:03,187 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101064102] [2019-10-15 03:26:03,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 03:26:03,188 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:26:03,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 03:26:03,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2019-10-15 03:26:03,192 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 26 states. [2019-10-15 03:26:04,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:26:04,163 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-10-15 03:26:04,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 03:26:04,163 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 42 [2019-10-15 03:26:04,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:26:04,164 INFO L225 Difference]: With dead ends: 54 [2019-10-15 03:26:04,164 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 03:26:04,166 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2019-10-15 03:26:04,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 03:26:04,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-15 03:26:04,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 03:26:04,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-15 03:26:04,174 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2019-10-15 03:26:04,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:26:04,175 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-15 03:26:04,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 03:26:04,175 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-15 03:26:04,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 03:26:04,176 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:26:04,176 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 03:26:04,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:26:04,385 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:26:04,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:26:04,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1194663378, now seen corresponding path program 4 times [2019-10-15 03:26:04,386 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:26:04,387 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77340302] [2019-10-15 03:26:04,387 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:04,387 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:04,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:26:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:26:04,563 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 03:26:04,563 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77340302] [2019-10-15 03:26:04,563 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152349172] [2019-10-15 03:26:04,563 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 03:26:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:26:04,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 03:26:04,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:26:04,724 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 03:26:04,724 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:26:05,007 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 03:26:05,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2130747567] [2019-10-15 03:26:05,010 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:26:05,010 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:26:05,010 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:26:05,011 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:26:05,011 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:26:05,037 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:26:06,349 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:26:06,373 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:26:06,375 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:26:06,758 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:26:06,758 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-10-15 03:26:06,759 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862624735] [2019-10-15 03:26:06,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-15 03:26:06,761 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:26:06,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-15 03:26:06,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1125, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 03:26:06,762 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 40 states. [2019-10-15 03:26:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:26:08,336 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2019-10-15 03:26:08,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-15 03:26:08,337 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2019-10-15 03:26:08,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:26:08,339 INFO L225 Difference]: With dead ends: 68 [2019-10-15 03:26:08,339 INFO L226 Difference]: Without dead ends: 50 [2019-10-15 03:26:08,342 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1244, Invalid=4158, Unknown=0, NotChecked=0, Total=5402 [2019-10-15 03:26:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-15 03:26:08,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-15 03:26:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-15 03:26:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-10-15 03:26:08,351 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2019-10-15 03:26:08,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:26:08,351 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-10-15 03:26:08,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-15 03:26:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-10-15 03:26:08,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-15 03:26:08,354 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:26:08,354 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 03:26:08,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:26:08,565 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:26:08,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:26:08,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1997950062, now seen corresponding path program 5 times [2019-10-15 03:26:08,566 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:26:08,567 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624266937] [2019-10-15 03:26:08,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:08,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:08,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:26:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:26:08,971 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 03:26:08,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624266937] [2019-10-15 03:26:08,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000928499] [2019-10-15 03:26:08,972 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 03:26:09,152 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:26:09,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:26:09,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:26:09,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:26:09,239 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 03:26:09,239 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:26:09,312 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 03:26:09,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1879930486] [2019-10-15 03:26:09,314 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:26:09,314 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:26:09,315 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:26:09,315 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:26:09,315 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:26:09,331 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:26:10,606 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:26:10,646 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:26:10,648 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:26:11,186 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:26:11,187 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4, 11] total 43 [2019-10-15 03:26:11,187 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344343346] [2019-10-15 03:26:11,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-15 03:26:11,189 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:26:11,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-15 03:26:11,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 03:26:11,190 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 44 states. [2019-10-15 03:26:13,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:26:13,566 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-10-15 03:26:13,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-15 03:26:13,566 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 63 [2019-10-15 03:26:13,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:26:13,567 INFO L225 Difference]: With dead ends: 72 [2019-10-15 03:26:13,567 INFO L226 Difference]: Without dead ends: 54 [2019-10-15 03:26:13,569 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1349, Invalid=5457, Unknown=0, NotChecked=0, Total=6806 [2019-10-15 03:26:13,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-15 03:26:13,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-15 03:26:13,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-15 03:26:13,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-10-15 03:26:13,578 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 63 [2019-10-15 03:26:13,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:26:13,578 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-10-15 03:26:13,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-15 03:26:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-10-15 03:26:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-15 03:26:13,580 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:26:13,580 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 03:26:13,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:26:13,785 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:26:13,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:26:13,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1475332959, now seen corresponding path program 6 times [2019-10-15 03:26:13,786 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:26:13,786 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675064724] [2019-10-15 03:26:13,786 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:13,787 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:13,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:26:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:26:14,286 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 03:26:14,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675064724] [2019-10-15 03:26:14,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089932386] [2019-10-15 03:26:14,286 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 03:26:14,506 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:26:14,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:26:14,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 03:26:14,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:26:14,529 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 03:26:14,529 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:26:15,474 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 03:26:15,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1842542168] [2019-10-15 03:26:15,476 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:26:15,476 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:26:15,477 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:26:15,477 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:26:15,477 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:26:15,502 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:26:16,696 INFO L199 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-10-15 03:26:16,726 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:26:16,728 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:26:17,378 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:26:17,378 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 11] total 69 [2019-10-15 03:26:17,378 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894151270] [2019-10-15 03:26:17,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-10-15 03:26:17,380 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:26:17,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-10-15 03:26:17,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1740, Invalid=3090, Unknown=0, NotChecked=0, Total=4830 [2019-10-15 03:26:17,382 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 70 states. [2019-10-15 03:26:20,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:26:20,918 INFO L93 Difference]: Finished difference Result 104 states and 140 transitions. [2019-10-15 03:26:20,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-10-15 03:26:20,918 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 67 [2019-10-15 03:26:20,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:26:20,920 INFO L225 Difference]: With dead ends: 104 [2019-10-15 03:26:20,920 INFO L226 Difference]: Without dead ends: 83 [2019-10-15 03:26:20,924 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3929 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5099, Invalid=12723, Unknown=0, NotChecked=0, Total=17822 [2019-10-15 03:26:20,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-15 03:26:20,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-10-15 03:26:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-15 03:26:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-15 03:26:20,936 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 67 [2019-10-15 03:26:20,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:26:20,937 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-15 03:26:20,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-10-15 03:26:20,937 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-15 03:26:20,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-15 03:26:20,939 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:26:20,939 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 03:26:21,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:26:21,143 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:26:21,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:26:21,144 INFO L82 PathProgramCache]: Analyzing trace with hash 441486205, now seen corresponding path program 7 times [2019-10-15 03:26:21,144 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:26:21,145 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722937950] [2019-10-15 03:26:21,145 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:21,145 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:21,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:26:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:26:22,725 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 03:26:22,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722937950] [2019-10-15 03:26:22,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588450655] [2019-10-15 03:26:22,726 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 03:26:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:26:23,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-15 03:26:23,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:26:23,032 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 03:26:23,032 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:26:24,523 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 03:26:24,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1934529889] [2019-10-15 03:26:24,525 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:26:24,525 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:26:24,525 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:26:24,525 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:26:24,526 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:26:24,547 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs