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_init1_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:33:23,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:33:23,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:33:23,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:33:23,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:33:23,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:33:23,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:33:23,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:33:23,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:33:23,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:33:23,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:33:23,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:33:23,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:33:23,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:33:23,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:33:23,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:33:23,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:33:23,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:33:23,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:33:23,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:33:23,215 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:33:23,233 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:33:23,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:33:23,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:33:23,236 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:33:23,236 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:33:23,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:33:23,236 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:33:23,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:33:23,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:33:23,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:33:23,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:33:23,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:33:23,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:33:23,239 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:33:23,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:33:23,239 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:33:23,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:33:23,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:33:23,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:33:23,240 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:33:23,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:33:23,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:33:23,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:33:23,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:33:23,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:33:23,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:33:23,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:33:23,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:33:23,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:33:23,523 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:33:23,537 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:33:23,541 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:33:23,543 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:33:23,543 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:33:23,544 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init1_ground-1.i [2019-10-15 01:33:23,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fb837481/565a74a695044d2eb1fde6c4d68e3b51/FLAG990a647c5 [2019-10-15 01:33:24,097 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:33:24,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init1_ground-1.i [2019-10-15 01:33:24,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fb837481/565a74a695044d2eb1fde6c4d68e3b51/FLAG990a647c5 [2019-10-15 01:33:24,461 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fb837481/565a74a695044d2eb1fde6c4d68e3b51 [2019-10-15 01:33:24,469 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:33:24,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:33:24,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:24,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:33:24,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:33:24,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:24" (1/1) ... [2019-10-15 01:33:24,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e76d925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:24, skipping insertion in model container [2019-10-15 01:33:24,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:24" (1/1) ... [2019-10-15 01:33:24,488 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:33:24,512 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:33:24,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:24,746 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:33:24,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:24,796 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:33:24,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:24 WrapperNode [2019-10-15 01:33:24,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:24,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:33:24,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:33:24,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:33:24,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:24" (1/1) ... [2019-10-15 01:33:24,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:24" (1/1) ... [2019-10-15 01:33:24,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:24" (1/1) ... [2019-10-15 01:33:24,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:24" (1/1) ... [2019-10-15 01:33:24,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:24" (1/1) ... [2019-10-15 01:33:24,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:24" (1/1) ... [2019-10-15 01:33:24,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:24" (1/1) ... [2019-10-15 01:33:24,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:33:24,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:33:24,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:33:24,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:33:24,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:33:24,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:33:24,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:33:24,996 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:33:24,996 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:33:24,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:33:24,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:33:24,996 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:33:24,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:33:24,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:33:24,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:33:24,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:33:24,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:33:24,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:33:25,329 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:33:25,329 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 01:33:25,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:25 BoogieIcfgContainer [2019-10-15 01:33:25,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:33:25,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:33:25,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:33:25,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:33:25,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:33:24" (1/3) ... [2019-10-15 01:33:25,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@666b940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:25, skipping insertion in model container [2019-10-15 01:33:25,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:24" (2/3) ... [2019-10-15 01:33:25,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@666b940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:25, skipping insertion in model container [2019-10-15 01:33:25,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:25" (3/3) ... [2019-10-15 01:33:25,339 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init1_ground-1.i [2019-10-15 01:33:25,353 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:33:25,361 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:33:25,372 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:33:25,397 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:33:25,398 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:33:25,398 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:33:25,398 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:33:25,398 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:33:25,398 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:33:25,399 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:33:25,399 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:33:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-15 01:33:25,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:33:25,422 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:25,423 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:25,425 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:25,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:25,430 INFO L82 PathProgramCache]: Analyzing trace with hash 243563535, now seen corresponding path program 1 times [2019-10-15 01:33:25,437 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:25,437 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216014230] [2019-10-15 01:33:25,438 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:25,438 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:25,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:25,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216014230] [2019-10-15 01:33:25,596 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:33:25,596 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:33:25,596 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686226425] [2019-10-15 01:33:25,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:33:25,602 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:25,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:33:25,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:33:25,620 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-10-15 01:33:25,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:25,666 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 01:33:25,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:33:25,668 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:33:25,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:25,674 INFO L225 Difference]: With dead ends: 31 [2019-10-15 01:33:25,675 INFO L226 Difference]: Without dead ends: 16 [2019-10-15 01:33:25,678 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:33:25,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-15 01:33:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-15 01:33:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-15 01:33:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-10-15 01:33:25,720 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2019-10-15 01:33:25,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:25,721 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-10-15 01:33:25,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:33:25,722 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-10-15 01:33:25,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:33:25,723 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:25,723 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:25,724 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:25,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:25,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1400307069, now seen corresponding path program 1 times [2019-10-15 01:33:25,725 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:25,725 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123535814] [2019-10-15 01:33:25,725 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:25,725 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:25,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:25,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123535814] [2019-10-15 01:33:25,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856307113] [2019-10-15 01:33:25,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:25,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:33:25,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:25,877 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:25,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [48794077] [2019-10-15 01:33:25,951 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 01:33:25,952 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:25,959 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:25,968 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:25,969 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:26,168 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:26,602 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:26,630 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:26,639 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:27,138 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:27,138 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-10-15 01:33:27,139 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787714837] [2019-10-15 01:33:27,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:33:27,143 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:27,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:33:27,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:33:27,147 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 17 states. [2019-10-15 01:33:27,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:27,867 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2019-10-15 01:33:27,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:33:27,868 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 12 [2019-10-15 01:33:27,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:27,869 INFO L225 Difference]: With dead ends: 37 [2019-10-15 01:33:27,870 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 01:33:27,871 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:33:27,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 01:33:27,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2019-10-15 01:33:27,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 01:33:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-10-15 01:33:27,878 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2019-10-15 01:33:27,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:27,878 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-10-15 01:33:27,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:33:27,879 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-10-15 01:33:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:33:27,879 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:27,879 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:28,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:28,085 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:28,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:28,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1364428529, now seen corresponding path program 2 times [2019-10-15 01:33:28,086 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:28,087 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682781473] [2019-10-15 01:33:28,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:28,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:28,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:28,167 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682781473] [2019-10-15 01:33:28,167 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932964001] [2019-10-15 01:33:28,168 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 [2019-10-15 01:33:28,240 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:33:28,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:28,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:33:28,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:28,267 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:28,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1633001225] [2019-10-15 01:33:28,356 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 01:33:28,356 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:28,357 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:28,357 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:28,357 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:28,409 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:28,629 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:28,644 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:28,653 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:29,113 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:29,114 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-10-15 01:33:29,114 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604945282] [2019-10-15 01:33:29,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:33:29,115 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:29,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:33:29,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:33:29,116 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 23 states. [2019-10-15 01:33:30,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:30,059 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2019-10-15 01:33:30,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:33:30,060 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 15 [2019-10-15 01:33:30,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:30,061 INFO L225 Difference]: With dead ends: 43 [2019-10-15 01:33:30,061 INFO L226 Difference]: Without dead ends: 34 [2019-10-15 01:33:30,063 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:33:30,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-15 01:33:30,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2019-10-15 01:33:30,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:33:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-10-15 01:33:30,071 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 15 [2019-10-15 01:33:30,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:30,071 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-10-15 01:33:30,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:33:30,072 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-10-15 01:33:30,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:33:30,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:30,073 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:30,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:30,284 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:30,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:30,285 INFO L82 PathProgramCache]: Analyzing trace with hash 883442831, now seen corresponding path program 3 times [2019-10-15 01:33:30,285 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:30,286 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176251742] [2019-10-15 01:33:30,286 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:30,286 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:30,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:30,496 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176251742] [2019-10-15 01:33:30,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697287112] [2019-10-15 01:33:30,499 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 [2019-10-15 01:33:30,579 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:33:30,579 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:30,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:33:30,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:30,605 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:30,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [125644521] [2019-10-15 01:33:30,818 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 01:33:30,818 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:30,818 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:30,819 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:30,819 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:30,857 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:31,032 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:31,064 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:31,073 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:31,518 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:31,518 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-10-15 01:33:31,518 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891829723] [2019-10-15 01:33:31,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:33:31,519 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:31,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:33:31,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:33:31,521 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 35 states. [2019-10-15 01:33:32,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:32,948 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2019-10-15 01:33:32,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:33:32,948 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 21 [2019-10-15 01:33:32,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:32,950 INFO L225 Difference]: With dead ends: 55 [2019-10-15 01:33:32,950 INFO L226 Difference]: Without dead ends: 46 [2019-10-15 01:33:32,952 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:33:32,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-15 01:33:32,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2019-10-15 01:33:32,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-15 01:33:32,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-10-15 01:33:32,961 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 21 [2019-10-15 01:33:32,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:32,962 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-10-15 01:33:32,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:33:32,962 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-10-15 01:33:32,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 01:33:32,963 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:32,963 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:33,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:33,171 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:33,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:33,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1549534321, now seen corresponding path program 4 times [2019-10-15 01:33:33,172 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:33,172 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593278965] [2019-10-15 01:33:33,172 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:33,173 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:33,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:33,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593278965] [2019-10-15 01:33:33,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29814302] [2019-10-15 01:33:33,542 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 [2019-10-15 01:33:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:33,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:33:33,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:33,641 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:34,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [355155524] [2019-10-15 01:33:34,299 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 01:33:34,299 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:34,300 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:34,300 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:34,302 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:34,341 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:34,448 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:34,455 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:34,459 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:34,942 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:34,943 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-10-15 01:33:34,943 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319713502] [2019-10-15 01:33:34,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:33:34,945 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:34,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:33:34,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:33:34,948 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 59 states. [2019-10-15 01:33:38,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:38,192 INFO L93 Difference]: Finished difference Result 79 states and 104 transitions. [2019-10-15 01:33:38,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:33:38,194 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 33 [2019-10-15 01:33:38,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:38,196 INFO L225 Difference]: With dead ends: 79 [2019-10-15 01:33:38,196 INFO L226 Difference]: Without dead ends: 70 [2019-10-15 01:33:38,199 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:33:38,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-15 01:33:38,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2019-10-15 01:33:38,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-15 01:33:38,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2019-10-15 01:33:38,214 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 33 [2019-10-15 01:33:38,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:38,214 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2019-10-15 01:33:38,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:33:38,214 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2019-10-15 01:33:38,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-15 01:33:38,216 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:38,216 INFO L380 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:38,429 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:38,430 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:38,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:38,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1865684593, now seen corresponding path program 5 times [2019-10-15 01:33:38,431 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:38,431 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460409864] [2019-10-15 01:33:38,432 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:38,432 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:38,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:39,543 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460409864] [2019-10-15 01:33:39,544 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69488678] [2019-10-15 01:33:39,544 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