/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/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/loops/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:03:53,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:03:53,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:03:53,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:03:53,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:03:53,363 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:03:53,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:03:53,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:03:53,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:03:53,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:03:53,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:03:53,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:03:53,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:03:53,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:03:53,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:03:53,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:03:53,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:03:53,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:03:53,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:03:53,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:03:53,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:03:53,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:03:53,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:03:53,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:03:53,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 04:03:53,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:03:53,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:03:53,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:03:53,415 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 [2019-11-07 04:03:53,428 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:03:53,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:03:53,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:03:53,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:03:53,433 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:03:53,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:03:53,434 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:03:53,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:03:53,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:03:53,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:03:53,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:03:53,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:03:53,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:03:53,435 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:03:53,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:03:53,438 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:03:53,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:03:53,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:03:53,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:03:53,439 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:03:53,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:03:53,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:03:53,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:03:53,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:03:53,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:03:53,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:03:53,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:03:53,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:03:53,441 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 [2019-11-07 04:03:53,750 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:03:53,770 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:03:53,773 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:03:53,775 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:03:53,775 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:03:53,776 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2019-11-07 04:03:53,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3491d6a54/e470ebaef81a45cf9897a8e21ae1d285/FLAG8eb7a0664 [2019-11-07 04:03:54,309 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:03:54,310 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i [2019-11-07 04:03:54,316 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3491d6a54/e470ebaef81a45cf9897a8e21ae1d285/FLAG8eb7a0664 [2019-11-07 04:03:54,688 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3491d6a54/e470ebaef81a45cf9897a8e21ae1d285 [2019-11-07 04:03:54,698 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:03:54,700 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:03:54,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:03:54,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:03:54,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:03:54,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:03:54" (1/1) ... [2019-11-07 04:03:54,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e65c51e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:54, skipping insertion in model container [2019-11-07 04:03:54,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:03:54" (1/1) ... [2019-11-07 04:03:54,717 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:03:54,734 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:03:54,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:03:54,914 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:03:54,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:03:54,951 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:03:54,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:54 WrapperNode [2019-11-07 04:03:54,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:03:54,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:03:54,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:03:54,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:03:55,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:54" (1/1) ... [2019-11-07 04:03:55,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:54" (1/1) ... [2019-11-07 04:03:55,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:54" (1/1) ... [2019-11-07 04:03:55,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:54" (1/1) ... [2019-11-07 04:03:55,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:54" (1/1) ... [2019-11-07 04:03:55,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:54" (1/1) ... [2019-11-07 04:03:55,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:54" (1/1) ... [2019-11-07 04:03:55,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:03:55,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:03:55,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:03:55,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:03:55,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:03:55,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:03:55,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:03:55,133 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 04:03:55,133 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:03:55,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:03:55,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 04:03:55,133 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:03:55,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:03:55,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:03:55,326 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:03:55,326 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 04:03:55,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:03:55 BoogieIcfgContainer [2019-11-07 04:03:55,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:03:55,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:03:55,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:03:55,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:03:55,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:03:54" (1/3) ... [2019-11-07 04:03:55,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@476695c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:03:55, skipping insertion in model container [2019-11-07 04:03:55,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:54" (2/3) ... [2019-11-07 04:03:55,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@476695c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:03:55, skipping insertion in model container [2019-11-07 04:03:55,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:03:55" (3/3) ... [2019-11-07 04:03:55,335 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2019-11-07 04:03:55,345 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:03:55,353 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:03:55,365 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:03:55,391 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:03:55,392 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:03:55,392 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:03:55,392 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:03:55,392 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:03:55,392 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:03:55,392 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:03:55,393 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:03:55,413 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-07 04:03:55,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 04:03:55,420 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:55,422 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:03:55,423 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:55,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:55,429 INFO L82 PathProgramCache]: Analyzing trace with hash 9943896, now seen corresponding path program 1 times [2019-11-07 04:03:55,436 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:55,437 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018681299] [2019-11-07 04:03:55,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:55,566 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018681299] [2019-11-07 04:03:55,567 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:03:55,567 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:03:55,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642685025] [2019-11-07 04:03:55,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:03:55,574 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:55,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:03:55,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:03:55,592 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-11-07 04:03:55,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:03:55,630 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-11-07 04:03:55,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:03:55,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-07 04:03:55,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:03:55,644 INFO L225 Difference]: With dead ends: 29 [2019-11-07 04:03:55,644 INFO L226 Difference]: Without dead ends: 12 [2019-11-07 04:03:55,647 INFO L630 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 [2019-11-07 04:03:55,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-07 04:03:55,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-07 04:03:55,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-07 04:03:55,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-11-07 04:03:55,689 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-11-07 04:03:55,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:03:55,690 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-11-07 04:03:55,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:03:55,690 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-11-07 04:03:55,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 04:03:55,691 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:55,691 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:03:55,692 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:55,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:55,692 INFO L82 PathProgramCache]: Analyzing trace with hash 282846133, now seen corresponding path program 1 times [2019-11-07 04:03:55,692 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:55,693 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731918345] [2019-11-07 04:03:55,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:55,758 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731918345] [2019-11-07 04:03:55,759 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627160958] [2019-11-07 04:03:55,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:55,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:03:55,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:03:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:55,860 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:03:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:55,914 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [842109093] [2019-11-07 04:03:55,936 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-07 04:03:55,936 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:03:55,942 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:03:55,949 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:03:55,950 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:03:56,008 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-11-07 04:03:56,116 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 04:03:56,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-11-07 04:03:56,128 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:03:56,238 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:03:56,239 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 6] total 11 [2019-11-07 04:03:56,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944975160] [2019-11-07 04:03:56,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 04:03:56,242 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:56,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 04:03:56,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-07 04:03:56,243 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2019-11-07 04:03:56,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:03:56,368 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-11-07 04:03:56,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-07 04:03:56,370 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2019-11-07 04:03:56,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:03:56,371 INFO L225 Difference]: With dead ends: 20 [2019-11-07 04:03:56,371 INFO L226 Difference]: Without dead ends: 15 [2019-11-07 04:03:56,373 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-11-07 04:03:56,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-07 04:03:56,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-07 04:03:56,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-07 04:03:56,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-07 04:03:56,380 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2019-11-07 04:03:56,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:03:56,380 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-07 04:03:56,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 04:03:56,381 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-07 04:03:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 04:03:56,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:56,382 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:03:56,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:56,592 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:56,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:56,592 INFO L82 PathProgramCache]: Analyzing trace with hash 76376728, now seen corresponding path program 2 times [2019-11-07 04:03:56,593 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:56,593 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133984105] [2019-11-07 04:03:56,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:56,730 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133984105] [2019-11-07 04:03:56,732 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075317522] [2019-11-07 04:03:56,732 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:56,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 04:03:56,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:03:56,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 04:03:56,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:03:56,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:56,800 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:03:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:56,874 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2135720922] [2019-11-07 04:03:56,875 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-07 04:03:56,875 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:03:56,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:03:56,876 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:03:56,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:03:56,901 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-11-07 04:03:56,982 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 04:03:56,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-11-07 04:03:56,996 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:03:57,099 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:03:57,099 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 6] total 15 [2019-11-07 04:03:57,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941306046] [2019-11-07 04:03:57,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-07 04:03:57,101 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:57,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-07 04:03:57,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-11-07 04:03:57,103 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2019-11-07 04:03:57,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:03:57,286 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-07 04:03:57,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-07 04:03:57,286 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2019-11-07 04:03:57,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:03:57,287 INFO L225 Difference]: With dead ends: 24 [2019-11-07 04:03:57,288 INFO L226 Difference]: Without dead ends: 19 [2019-11-07 04:03:57,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2019-11-07 04:03:57,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-07 04:03:57,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-07 04:03:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-07 04:03:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-11-07 04:03:57,295 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2019-11-07 04:03:57,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:03:57,295 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-11-07 04:03:57,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-07 04:03:57,295 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-11-07 04:03:57,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 04:03:57,296 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:57,296 INFO L410 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:03:57,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:57,497 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:57,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:57,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1416005160, now seen corresponding path program 3 times [2019-11-07 04:03:57,498 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:57,498 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709856017] [2019-11-07 04:03:57,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:57,763 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709856017] [2019-11-07 04:03:57,763 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534647009] [2019-11-07 04:03:57,764 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:57,799 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 04:03:57,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:03:57,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 04:03:57,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:03:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:57,879 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:03:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:58,151 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1199938632] [2019-11-07 04:03:58,153 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-07 04:03:58,153 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:03:58,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:03:58,154 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:03:58,155 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:03:58,171 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-11-07 04:03:58,221 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 04:03:58,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-11-07 04:03:58,229 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:03:58,394 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:03:58,394 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 6] total 29 [2019-11-07 04:03:58,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583577685] [2019-11-07 04:03:58,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-07 04:03:58,396 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:58,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-07 04:03:58,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2019-11-07 04:03:58,398 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 29 states. [2019-11-07 04:03:58,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:03:58,904 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-11-07 04:03:58,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-07 04:03:58,905 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 18 [2019-11-07 04:03:58,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:03:58,906 INFO L225 Difference]: With dead ends: 25 [2019-11-07 04:03:58,906 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 04:03:58,907 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=1427, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 04:03:58,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 04:03:58,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 04:03:58,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 04:03:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-11-07 04:03:58,914 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-11-07 04:03:58,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:03:58,915 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-11-07 04:03:58,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-07 04:03:58,915 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-11-07 04:03:58,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-07 04:03:58,916 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:58,916 INFO L410 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:03:59,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:59,117 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:59,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:59,117 INFO L82 PathProgramCache]: Analyzing trace with hash -971901643, now seen corresponding path program 4 times [2019-11-07 04:03:59,118 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:59,118 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125111061] [2019-11-07 04:03:59,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:59,203 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125111061] [2019-11-07 04:03:59,203 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:03:59,203 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-11-07 04:03:59,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446832829] [2019-11-07 04:03:59,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 04:03:59,204 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:59,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 04:03:59,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-07 04:03:59,205 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2019-11-07 04:03:59,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:03:59,234 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-11-07 04:03:59,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-07 04:03:59,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-11-07 04:03:59,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:03:59,235 INFO L225 Difference]: With dead ends: 20 [2019-11-07 04:03:59,235 INFO L226 Difference]: Without dead ends: 0 [2019-11-07 04:03:59,236 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-07 04:03:59,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-07 04:03:59,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-07 04:03:59,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-07 04:03:59,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-07 04:03:59,236 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2019-11-07 04:03:59,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:03:59,236 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-07 04:03:59,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 04:03:59,237 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-07 04:03:59,237 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-07 04:03:59,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-07 04:03:59,449 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2019-11-07 04:03:59,452 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-11-07 04:03:59,452 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-07 04:03:59,452 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-07 04:03:59,452 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-11-07 04:03:59,452 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-07 04:03:59,452 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-07 04:03:59,453 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2019-11-07 04:03:59,453 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2019-11-07 04:03:59,453 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 11 17) no Hoare annotation was computed. [2019-11-07 04:03:59,453 INFO L439 ceAbstractionStarter]: At program point L13-3(lines 13 15) the Hoare annotation is: (or (and (<= 10 main_~sn~0) (< main_~i~0 7) (<= 6 main_~i~0) (<= main_~sn~0 10)) (and (<= 1 main_~i~0) (<= main_~i~0 1) (<= main_~sn~0 0) (<= 0 main_~sn~0)) (and (<= 7 main_~i~0) (< main_~i~0 8) (<= 12 main_~sn~0) (<= main_~sn~0 12)) (and (<= 14 main_~sn~0) (<= 8 main_~i~0) (<= main_~i~0 8) (<= main_~sn~0 14)) (and (<= 6 main_~sn~0) (<= main_~sn~0 6) (<= 4 main_~i~0) (<= main_~i~0 4)) (and (<= main_~sn~0 8) (<= 5 main_~i~0) (<= main_~i~0 5) (<= 8 main_~sn~0)) (and (<= 9 main_~i~0) (<= main_~sn~0 16) (< 15 main_~sn~0)) (and (<= main_~i~0 3) (<= main_~sn~0 4) (<= 3 main_~i~0) (<= 4 main_~sn~0)) (and (<= 2 main_~i~0) (<= main_~i~0 2) (<= main_~sn~0 2) (<= 2 main_~sn~0))) [2019-11-07 04:03:59,454 INFO L439 ceAbstractionStarter]: At program point L13-4(lines 13 15) the Hoare annotation is: (and (< 8 main_~i~0) (<= main_~sn~0 16) (< 15 main_~sn~0)) [2019-11-07 04:03:59,454 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-07 04:03:59,454 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-11-07 04:03:59,454 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-11-07 04:03:59,454 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-07 04:03:59,454 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-07 04:03:59,455 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-11-07 04:03:59,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 04:03:59 BoogieIcfgContainer [2019-11-07 04:03:59,476 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 04:03:59,478 INFO L168 Benchmark]: Toolchain (without parser) took 4777.65 ms. Allocated memory was 143.7 MB in the beginning and 249.6 MB in the end (delta: 105.9 MB). Free memory was 101.9 MB in the beginning and 221.8 MB in the end (delta: -119.9 MB). Peak memory consumption was 117.0 MB. Max. memory is 7.1 GB. [2019-11-07 04:03:59,479 INFO L168 Benchmark]: CDTParser took 1.25 ms. Allocated memory is still 143.7 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-07 04:03:59,480 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.30 ms. Allocated memory is still 143.7 MB. Free memory was 101.7 MB in the beginning and 92.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-11-07 04:03:59,481 INFO L168 Benchmark]: Boogie Preprocessor took 125.56 ms. Allocated memory was 143.7 MB in the beginning and 201.9 MB in the end (delta: 58.2 MB). Free memory was 92.4 MB in the beginning and 180.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2019-11-07 04:03:59,481 INFO L168 Benchmark]: RCFGBuilder took 248.93 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 168.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2019-11-07 04:03:59,483 INFO L168 Benchmark]: TraceAbstraction took 4147.37 ms. Allocated memory was 201.9 MB in the beginning and 249.6 MB in the end (delta: 47.7 MB). Free memory was 168.7 MB in the beginning and 221.8 MB in the end (delta: -53.1 MB). Peak memory consumption was 125.7 MB. Max. memory is 7.1 GB. [2019-11-07 04:03:59,487 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.25 ms. Allocated memory is still 143.7 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 251.30 ms. Allocated memory is still 143.7 MB. Free memory was 101.7 MB in the beginning and 92.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.56 ms. Allocated memory was 143.7 MB in the beginning and 201.9 MB in the end (delta: 58.2 MB). Free memory was 92.4 MB in the beginning and 180.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 248.93 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 168.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4147.37 ms. Allocated memory was 201.9 MB in the beginning and 249.6 MB in the end (delta: 47.7 MB). Free memory was 168.7 MB in the beginning and 221.8 MB in the end (delta: -53.1 MB). Peak memory consumption was 125.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((10 <= sn && i < 7) && 6 <= i) && sn <= 10) || (((1 <= i && i <= 1) && sn <= 0) && 0 <= sn)) || (((7 <= i && i < 8) && 12 <= sn) && sn <= 12)) || (((14 <= sn && 8 <= i) && i <= 8) && sn <= 14)) || (((6 <= sn && sn <= 6) && 4 <= i) && i <= 4)) || (((sn <= 8 && 5 <= i) && i <= 5) && 8 <= sn)) || ((9 <= i && sn <= 16) && 15 < sn)) || (((i <= 3 && sn <= 4) && 3 <= i) && 4 <= sn)) || (((2 <= i && i <= 2) && sn <= 2) && 2 <= sn) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Result: SAFE, OverallTime: 4.0s, OverallIterations: 5, TraceHistogramMax: 9, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, HoareTripleCheckerStatistics: 42 SDtfs, 20 SDslu, 200 SDs, 0 SdLazy, 346 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 187 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 21 NumberOfFragments, 130 HoareAnnotationTreeSize, 11 FomulaSimplifications, 8 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 57 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 115 NumberOfCodeBlocks, 115 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 147 ConstructedInterpolants, 0 QuantifiedInterpolants, 6535 SizeOfPredicates, 4 NumberOfNonLiveVariables, 137 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 45/186 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 392, ICFG_INTERPRETER_ENTERED_PROCEDURES: 12, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 30, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 30, TOOLS_POST_TIME[ms]: 25, TOOLS_POST_CALL_APPLICATIONS: 15, TOOLS_POST_CALL_TIME[ms]: 19, TOOLS_POST_RETURN_APPLICATIONS: 6, TOOLS_POST_RETURN_TIME[ms]: 13, TOOLS_QUANTIFIERELIM_APPLICATIONS: 51, TOOLS_QUANTIFIERELIM_TIME[ms]: 34, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 9, FLUID_QUERY_TIME[ms]: 5, FLUID_QUERIES: 117, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 6, DOMAIN_JOIN_TIME[ms]: 20, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 6, DOMAIN_WIDEN_TIME[ms]: 147, DOMAIN_ISSUBSETEQ_APPLICATIONS: 9, DOMAIN_ISSUBSETEQ_TIME[ms]: 20, DOMAIN_ISBOTTOM_APPLICATIONS: 30, DOMAIN_ISBOTTOM_TIME[ms]: 63, LOOP_SUMMARIZER_APPLICATIONS: 3, LOOP_SUMMARIZER_CACHE_MISSES: 3, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 194, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 194, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 9, CALL_SUMMARIZER_APPLICATIONS: 6, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME[ms]: 6, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 5, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 5, PATH_EXPR_TIME[ms]: 4, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 19, DAG_COMPRESSION_PROCESSED_NODES: 174, DAG_COMPRESSION_RETAINED_NODES: 129, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...