/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/array-examples/standard_two_index_03.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:27:17,568 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:27:17,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:27:17,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:27:17,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:27:17,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:27:17,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:27:17,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:27:17,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:27:17,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:27:17,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:27:17,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:27:17,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:27:17,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:27:17,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:27:17,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:27:17,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:27:17,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:27:17,618 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 01:27:17,632 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:27:17,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:27:17,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:27:17,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:27:17,634 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:27:17,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:27:17,634 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:27:17,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:27:17,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:27:17,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:27:17,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:27:17,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:27:17,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:27:17,636 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:27:17,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:27:17,636 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:27:17,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:27:17,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:27:17,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:27:17,637 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:27:17,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:27:17,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:27:17,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:27:17,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:27:17,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:27:17,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:27:17,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:27:17,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:27:17,639 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 01:27:17,965 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:27:17,988 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:27:17,992 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:27:17,993 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:27:17,994 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:27:17,995 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_03.i [2019-11-07 01:27:18,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0f6ef96b/7db24cc9a9c14c938f671cfaf06ace04/FLAG704c2775e [2019-11-07 01:27:18,450 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:27:18,451 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_03.i [2019-11-07 01:27:18,458 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0f6ef96b/7db24cc9a9c14c938f671cfaf06ace04/FLAG704c2775e [2019-11-07 01:27:18,840 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0f6ef96b/7db24cc9a9c14c938f671cfaf06ace04 [2019-11-07 01:27:18,868 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:27:18,872 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:27:18,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:27:18,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:27:18,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:27:18,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:27:18" (1/1) ... [2019-11-07 01:27:18,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6afdfcfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:18, skipping insertion in model container [2019-11-07 01:27:18,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:27:18" (1/1) ... [2019-11-07 01:27:18,915 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:27:18,956 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:27:19,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:27:19,287 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:27:19,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:27:19,341 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:27:19,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:19 WrapperNode [2019-11-07 01:27:19,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:27:19,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:27:19,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:27:19,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:27:19,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:19" (1/1) ... [2019-11-07 01:27:19,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:19" (1/1) ... [2019-11-07 01:27:19,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:19" (1/1) ... [2019-11-07 01:27:19,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:19" (1/1) ... [2019-11-07 01:27:19,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:19" (1/1) ... [2019-11-07 01:27:19,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:19" (1/1) ... [2019-11-07 01:27:19,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:19" (1/1) ... [2019-11-07 01:27:19,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:27:19,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:27:19,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:27:19,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:27:19,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:19" (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 01:27:19,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:27:19,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:27:19,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:27:19,550 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:27:19,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:27:19,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:27:19,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:27:19,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:27:19,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:27:19,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:27:19,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:27:19,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:27:19,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:27:19,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:27:19,884 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:27:19,884 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 01:27:19,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:27:19 BoogieIcfgContainer [2019-11-07 01:27:19,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:27:19,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:27:19,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:27:19,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:27:19,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:27:18" (1/3) ... [2019-11-07 01:27:19,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50921c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:27:19, skipping insertion in model container [2019-11-07 01:27:19,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:19" (2/3) ... [2019-11-07 01:27:19,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50921c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:27:19, skipping insertion in model container [2019-11-07 01:27:19,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:27:19" (3/3) ... [2019-11-07 01:27:19,900 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_03.i [2019-11-07 01:27:19,909 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:27:19,915 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:27:19,927 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:27:19,957 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:27:19,957 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:27:19,958 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:27:19,958 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:27:19,958 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:27:19,958 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:27:19,958 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:27:19,958 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:27:19,972 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-07 01:27:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 01:27:19,977 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:19,977 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:19,979 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:19,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:19,984 INFO L82 PathProgramCache]: Analyzing trace with hash 328370140, now seen corresponding path program 1 times [2019-11-07 01:27:19,991 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:19,991 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218955506] [2019-11-07 01:27:19,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:20,171 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 01:27:20,171 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218955506] [2019-11-07 01:27:20,172 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:27:20,173 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:27:20,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693706017] [2019-11-07 01:27:20,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:27:20,178 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:27:20,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:27:20,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:27:20,191 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-11-07 01:27:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:27:20,251 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-11-07 01:27:20,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:27:20,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-07 01:27:20,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:27:20,259 INFO L225 Difference]: With dead ends: 33 [2019-11-07 01:27:20,260 INFO L226 Difference]: Without dead ends: 17 [2019-11-07 01:27:20,263 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 01:27:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-07 01:27:20,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-07 01:27:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-07 01:27:20,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-07 01:27:20,301 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2019-11-07 01:27:20,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:27:20,302 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-07 01:27:20,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:27:20,302 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-07 01:27:20,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:27:20,303 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:20,304 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:20,304 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:20,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:20,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1896737256, now seen corresponding path program 1 times [2019-11-07 01:27:20,305 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:20,305 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883251352] [2019-11-07 01:27:20,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:20,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:27:20,366 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883251352] [2019-11-07 01:27:20,366 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:27:20,366 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:27:20,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709452743] [2019-11-07 01:27:20,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:27:20,369 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:27:20,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:27:20,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:27:20,370 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2019-11-07 01:27:20,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:27:20,422 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-11-07 01:27:20,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:27:20,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-07 01:27:20,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:27:20,425 INFO L225 Difference]: With dead ends: 30 [2019-11-07 01:27:20,425 INFO L226 Difference]: Without dead ends: 21 [2019-11-07 01:27:20,426 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 01:27:20,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-07 01:27:20,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2019-11-07 01:27:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-07 01:27:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-07 01:27:20,436 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-11-07 01:27:20,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:27:20,436 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-07 01:27:20,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:27:20,437 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-07 01:27:20,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:27:20,437 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:20,438 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:20,438 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:20,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:20,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1718311367, now seen corresponding path program 1 times [2019-11-07 01:27:20,439 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:20,439 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268232438] [2019-11-07 01:27:20,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:27:20,523 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268232438] [2019-11-07 01:27:20,526 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623452337] [2019-11-07 01:27:20,526 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 01:27:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:20,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:27:20,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:27:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:27:20,637 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:27:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:27:20,675 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [829281247] [2019-11-07 01:27:20,706 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:27:20,707 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:27:20,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:27:20,719 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:27:20,720 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:27:20,839 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:27:21,289 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2019-11-07 01:27:21,439 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-11-07 01:27:21,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:27:21,450 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:27:21,730 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:27:21,730 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-11-07 01:27:21,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645606114] [2019-11-07 01:27:21,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 01:27:21,732 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:27:21,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 01:27:21,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:27:21,733 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 18 states. [2019-11-07 01:27:22,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:27:22,510 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2019-11-07 01:27:22,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-07 01:27:22,510 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-11-07 01:27:22,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:27:22,512 INFO L225 Difference]: With dead ends: 50 [2019-11-07 01:27:22,512 INFO L226 Difference]: Without dead ends: 39 [2019-11-07 01:27:22,513 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2019-11-07 01:27:22,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-07 01:27:22,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2019-11-07 01:27:22,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-07 01:27:22,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-07 01:27:22,521 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-11-07 01:27:22,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:27:22,522 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-07 01:27:22,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 01:27:22,522 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-07 01:27:22,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-07 01:27:22,523 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:22,523 INFO L410 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:22,726 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:27:22,727 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:22,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:22,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1363999975, now seen corresponding path program 2 times [2019-11-07 01:27:22,728 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:22,728 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244366035] [2019-11-07 01:27:22,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:27:22,836 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244366035] [2019-11-07 01:27:22,836 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155213053] [2019-11-07 01:27:22,836 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 01:27:22,888 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:27:22,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:27:22,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:27:22,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:27:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:27:22,906 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:27:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:27:22,946 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1391171077] [2019-11-07 01:27:22,947 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:27:22,947 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:27:22,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:27:22,948 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:27:22,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:27:22,982 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:27:23,298 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-11-07 01:27:23,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:27:23,307 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:27:23,534 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:27:23,535 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 11] total 21 [2019-11-07 01:27:23,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787346075] [2019-11-07 01:27:23,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-07 01:27:23,536 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:27:23,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-07 01:27:23,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2019-11-07 01:27:23,537 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 21 states. [2019-11-07 01:27:24,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:27:24,572 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2019-11-07 01:27:24,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-07 01:27:24,572 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2019-11-07 01:27:24,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:27:24,574 INFO L225 Difference]: With dead ends: 73 [2019-11-07 01:27:24,574 INFO L226 Difference]: Without dead ends: 60 [2019-11-07 01:27:24,575 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=436, Invalid=1456, Unknown=0, NotChecked=0, Total=1892 [2019-11-07 01:27:24,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-07 01:27:24,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 32. [2019-11-07 01:27:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-07 01:27:24,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-11-07 01:27:24,586 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2019-11-07 01:27:24,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:27:24,586 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-11-07 01:27:24,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-07 01:27:24,587 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-11-07 01:27:24,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-07 01:27:24,587 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:24,588 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:24,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:27:24,793 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:24,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:24,793 INFO L82 PathProgramCache]: Analyzing trace with hash 311824988, now seen corresponding path program 3 times [2019-11-07 01:27:24,793 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:24,793 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629198305] [2019-11-07 01:27:24,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 01:27:24,944 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629198305] [2019-11-07 01:27:24,944 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745180186] [2019-11-07 01:27:24,944 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 01:27:25,005 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:27:25,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:27:25,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-07 01:27:25,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:27:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 01:27:25,080 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:27:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 01:27:25,216 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1763764274] [2019-11-07 01:27:25,218 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:27:25,218 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:27:25,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:27:25,219 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:27:25,219 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:27:25,245 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:27:25,507 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-11-07 01:27:25,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:27:25,518 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:27:25,776 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:27:25,777 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 37 [2019-11-07 01:27:25,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501088838] [2019-11-07 01:27:25,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-07 01:27:25,779 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:27:25,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-07 01:27:25,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=904, Unknown=0, NotChecked=0, Total=1332 [2019-11-07 01:27:25,780 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 37 states. [2019-11-07 01:27:27,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:27:27,771 INFO L93 Difference]: Finished difference Result 112 states and 146 transitions. [2019-11-07 01:27:27,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-07 01:27:27,772 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 28 [2019-11-07 01:27:27,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:27:27,774 INFO L225 Difference]: With dead ends: 112 [2019-11-07 01:27:27,775 INFO L226 Difference]: Without dead ends: 94 [2019-11-07 01:27:27,778 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2061 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1702, Invalid=4778, Unknown=0, NotChecked=0, Total=6480 [2019-11-07 01:27:27,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-07 01:27:27,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 52. [2019-11-07 01:27:27,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-07 01:27:27,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2019-11-07 01:27:27,792 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 28 [2019-11-07 01:27:27,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:27:27,792 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2019-11-07 01:27:27,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-07 01:27:27,792 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2019-11-07 01:27:27,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-07 01:27:27,794 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:27,794 INFO L410 BasicCegarLoop]: trace histogram [24, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:27,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:27:27,998 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:27,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:27,998 INFO L82 PathProgramCache]: Analyzing trace with hash -19181412, now seen corresponding path program 4 times [2019-11-07 01:27:27,999 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:27,999 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551029836] [2019-11-07 01:27:27,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-07 01:27:28,230 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551029836] [2019-11-07 01:27:28,230 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508056888] [2019-11-07 01:27:28,231 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 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 [2019-11-07 01:27:28,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:28,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-07 01:27:28,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:27:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-07 01:27:28,529 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:27:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-07 01:27:29,176 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2030482982] [2019-11-07 01:27:29,178 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:27:29,178 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:27:29,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:27:29,179 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:27:29,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:27:29,202 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:27:29,477 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-11-07 01:27:29,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:27:29,489 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:27:29,841 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:27:29,842 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 27, 27, 11] total 68 [2019-11-07 01:27:29,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061737984] [2019-11-07 01:27:29,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-11-07 01:27:29,843 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:27:29,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-11-07 01:27:29,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1792, Invalid=2764, Unknown=0, NotChecked=0, Total=4556 [2019-11-07 01:27:29,848 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 68 states. [2019-11-07 01:27:34,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:27:34,932 INFO L93 Difference]: Finished difference Result 185 states and 249 transitions. [2019-11-07 01:27:34,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-11-07 01:27:34,932 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 48 [2019-11-07 01:27:34,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:27:34,933 INFO L225 Difference]: With dead ends: 185 [2019-11-07 01:27:34,934 INFO L226 Difference]: Without dead ends: 163 [2019-11-07 01:27:34,941 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7869 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6850, Invalid=16102, Unknown=0, NotChecked=0, Total=22952 [2019-11-07 01:27:34,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-07 01:27:34,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 93. [2019-11-07 01:27:34,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-07 01:27:34,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2019-11-07 01:27:34,962 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 48 [2019-11-07 01:27:34,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:27:34,962 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2019-11-07 01:27:34,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-11-07 01:27:34,963 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2019-11-07 01:27:34,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-07 01:27:34,965 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:27:34,965 INFO L410 BasicCegarLoop]: trace histogram [55, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:27:35,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:27:35,169 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:27:35,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:27:35,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1425033416, now seen corresponding path program 5 times [2019-11-07 01:27:35,170 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:27:35,171 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262877972] [2019-11-07 01:27:35,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:27:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:27:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1793 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2019-11-07 01:27:35,589 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262877972] [2019-11-07 01:27:35,589 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290760972] [2019-11-07 01:27:35,590 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 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