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/sanfoundry_02_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:31:42,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:31:42,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:31:42,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:31:42,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:31:42,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:31:42,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:31:42,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:31:42,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:31:42,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:31:42,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:31:42,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:31:42,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:31:42,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:31:42,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:31:42,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:31:42,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:31:42,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:31:42,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:31:42,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:31:42,999 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 01:31:43,023 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:31:43,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:31:43,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:31:43,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:31:43,025 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:31:43,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:31:43,025 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:31:43,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:31:43,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:31:43,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:31:43,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:31:43,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:31:43,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:31:43,027 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:31:43,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:31:43,027 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:31:43,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:31:43,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:31:43,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:31:43,028 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:31:43,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:31:43,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:31:43,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:31:43,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:31:43,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:31:43,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:31:43,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:31:43,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:31:43,030 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 01:31:43,288 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:31:43,301 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:31:43,305 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:31:43,306 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:31:43,307 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:31:43,307 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2019-10-15 01:31:43,370 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1877d1da7/64ea5e33c52049c39c7b70b8c29c895b/FLAG5fff67d35 [2019-10-15 01:31:43,869 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:31:43,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2019-10-15 01:31:43,878 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1877d1da7/64ea5e33c52049c39c7b70b8c29c895b/FLAG5fff67d35 [2019-10-15 01:31:44,260 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1877d1da7/64ea5e33c52049c39c7b70b8c29c895b [2019-10-15 01:31:44,273 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:31:44,275 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:31:44,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:44,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:31:44,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:31:44,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:44" (1/1) ... [2019-10-15 01:31:44,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f51de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44, skipping insertion in model container [2019-10-15 01:31:44,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:44" (1/1) ... [2019-10-15 01:31:44,292 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:31:44,315 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:31:44,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:44,583 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:31:44,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:44,658 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:31:44,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44 WrapperNode [2019-10-15 01:31:44,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:44,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:31:44,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:31:44,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:31:44,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44" (1/1) ... [2019-10-15 01:31:44,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44" (1/1) ... [2019-10-15 01:31:44,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44" (1/1) ... [2019-10-15 01:31:44,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44" (1/1) ... [2019-10-15 01:31:44,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44" (1/1) ... [2019-10-15 01:31:44,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44" (1/1) ... [2019-10-15 01:31:44,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44" (1/1) ... [2019-10-15 01:31:44,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:31:44,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:31:44,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:31:44,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:31:44,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44" (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 01:31:44,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:31:44,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:31:44,910 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:31:44,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:31:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:31:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:31:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:31:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:31:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:31:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:31:44,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:31:44,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:31:44,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:31:44,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:31:45,464 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:31:45,465 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 01:31:45,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:45 BoogieIcfgContainer [2019-10-15 01:31:45,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:31:45,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:31:45,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:31:45,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:31:45,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:31:44" (1/3) ... [2019-10-15 01:31:45,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a8228b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:45, skipping insertion in model container [2019-10-15 01:31:45,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44" (2/3) ... [2019-10-15 01:31:45,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a8228b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:45, skipping insertion in model container [2019-10-15 01:31:45,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:45" (3/3) ... [2019-10-15 01:31:45,474 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_02_ground.i [2019-10-15 01:31:45,484 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:31:45,492 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:31:45,504 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:31:45,529 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:31:45,530 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:31:45,530 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:31:45,530 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:31:45,531 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:31:45,531 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:31:45,531 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:31:45,531 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:31:45,549 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-15 01:31:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:31:45,555 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:45,556 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:45,558 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:45,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:45,564 INFO L82 PathProgramCache]: Analyzing trace with hash -556049670, now seen corresponding path program 1 times [2019-10-15 01:31:45,572 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:45,572 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261700461] [2019-10-15 01:31:45,573 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:45,573 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:45,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:45,729 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 01:31:45,731 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261700461] [2019-10-15 01:31:45,732 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:45,732 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:45,734 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523245175] [2019-10-15 01:31:45,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:45,739 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:45,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:45,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:45,758 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-10-15 01:31:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:45,795 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2019-10-15 01:31:45,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:45,797 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:31:45,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:45,807 INFO L225 Difference]: With dead ends: 39 [2019-10-15 01:31:45,807 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:31:45,810 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 01:31:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:31:45,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:31:45,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:31:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 01:31:45,865 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2019-10-15 01:31:45,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:45,866 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 01:31:45,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:45,866 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 01:31:45,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:31:45,870 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:45,870 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:45,872 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:45,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:45,873 INFO L82 PathProgramCache]: Analyzing trace with hash -275638623, now seen corresponding path program 1 times [2019-10-15 01:31:45,873 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:45,874 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240648024] [2019-10-15 01:31:45,874 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:45,874 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:45,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:31:45,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240648024] [2019-10-15 01:31:45,957 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:45,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:45,958 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725666884] [2019-10-15 01:31:45,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:45,960 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:45,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:45,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:45,960 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 01:31:45,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:45,992 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-10-15 01:31:45,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:45,993 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:31:45,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:45,994 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:31:45,994 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:31:45,996 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 01:31:45,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:31:46,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 01:31:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:31:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 01:31:46,008 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2019-10-15 01:31:46,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:46,009 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 01:31:46,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:46,010 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 01:31:46,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:31:46,011 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:46,011 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:46,012 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:46,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:46,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1658314951, now seen corresponding path program 1 times [2019-10-15 01:31:46,013 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:46,014 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457658096] [2019-10-15 01:31:46,015 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:46,015 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:46,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:31:46,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457658096] [2019-10-15 01:31:46,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939518147] [2019-10-15 01:31:46,079 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 01:31:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:46,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:31:46,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:31:46,179 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:31:46,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1173652495] [2019-10-15 01:31:46,256 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:31:46,257 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:46,263 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:46,269 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:46,270 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:46,433 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:46,712 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:31:46,762 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:46,773 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:47,124 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:47,124 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:31:47,124 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915880295] [2019-10-15 01:31:47,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:31:47,127 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:47,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:31:47,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:31:47,129 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 18 states. [2019-10-15 01:31:47,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:47,878 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2019-10-15 01:31:47,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:31:47,879 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-10-15 01:31:47,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:47,880 INFO L225 Difference]: With dead ends: 46 [2019-10-15 01:31:47,880 INFO L226 Difference]: Without dead ends: 32 [2019-10-15 01:31:47,882 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:31:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-15 01:31:47,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-10-15 01:31:47,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-15 01:31:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-10-15 01:31:47,892 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 14 [2019-10-15 01:31:47,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:47,892 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-10-15 01:31:47,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:31:47,893 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-10-15 01:31:47,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 01:31:47,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:47,894 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:48,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:48,100 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:48,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:48,101 INFO L82 PathProgramCache]: Analyzing trace with hash -716975334, now seen corresponding path program 2 times [2019-10-15 01:31:48,101 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:48,101 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390906310] [2019-10-15 01:31:48,101 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:48,102 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:48,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:31:48,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390906310] [2019-10-15 01:31:48,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865241464] [2019-10-15 01:31:48,239 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 01:31:48,299 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:31:48,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:48,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:31:48,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:31:48,308 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:31:48,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [149171743] [2019-10-15 01:31:48,375 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:31:48,375 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:48,376 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:48,376 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:48,376 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:48,410 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:48,527 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:31:48,544 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:48,550 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:48,850 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:48,850 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 22 [2019-10-15 01:31:48,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082423088] [2019-10-15 01:31:48,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:31:48,852 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:48,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:31:48,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:31:48,853 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 22 states. [2019-10-15 01:31:49,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:49,840 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2019-10-15 01:31:49,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-15 01:31:49,841 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2019-10-15 01:31:49,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:49,843 INFO L225 Difference]: With dead ends: 60 [2019-10-15 01:31:49,843 INFO L226 Difference]: Without dead ends: 42 [2019-10-15 01:31:49,845 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=484, Invalid=1868, Unknown=0, NotChecked=0, Total=2352 [2019-10-15 01:31:49,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-15 01:31:49,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-10-15 01:31:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-15 01:31:49,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2019-10-15 01:31:49,854 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 22 [2019-10-15 01:31:49,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:49,855 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2019-10-15 01:31:49,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:31:49,855 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2019-10-15 01:31:49,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:31:49,856 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:49,856 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:50,062 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:50,062 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:50,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:50,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1055620890, now seen corresponding path program 3 times [2019-10-15 01:31:50,063 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:50,063 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104357897] [2019-10-15 01:31:50,063 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:50,063 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:50,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:31:50,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104357897] [2019-10-15 01:31:50,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355617603] [2019-10-15 01:31:50,244 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 01:31:50,331 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:31:50,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:50,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:31:50,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:31:50,364 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:31:50,548 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1625803953] [2019-10-15 01:31:50,550 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:31:50,550 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:50,551 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:50,551 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:50,551 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:50,578 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:50,697 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:31:50,716 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:50,722 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:51,125 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:51,126 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 36 [2019-10-15 01:31:51,126 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029271981] [2019-10-15 01:31:51,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-15 01:31:51,127 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:51,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-15 01:31:51,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=906, Unknown=0, NotChecked=0, Total=1260 [2019-10-15 01:31:51,135 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 36 states. [2019-10-15 01:31:53,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:53,120 INFO L93 Difference]: Finished difference Result 92 states and 126 transitions. [2019-10-15 01:31:53,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:31:53,120 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 32 [2019-10-15 01:31:53,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:53,122 INFO L225 Difference]: With dead ends: 92 [2019-10-15 01:31:53,123 INFO L226 Difference]: Without dead ends: 68 [2019-10-15 01:31:53,127 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2223 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1903, Invalid=5929, Unknown=0, NotChecked=0, Total=7832 [2019-10-15 01:31:53,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-15 01:31:53,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-10-15 01:31:53,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-15 01:31:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-10-15 01:31:53,139 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 32 [2019-10-15 01:31:53,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:53,140 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-10-15 01:31:53,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-15 01:31:53,140 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-10-15 01:31:53,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-15 01:31:53,142 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:53,142 INFO L380 BasicCegarLoop]: trace histogram [24, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:53,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:53,346 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:53,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:53,347 INFO L82 PathProgramCache]: Analyzing trace with hash -171811398, now seen corresponding path program 4 times [2019-10-15 01:31:53,347 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:53,348 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124018305] [2019-10-15 01:31:53,348 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:53,348 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:53,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-10-15 01:31:53,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124018305] [2019-10-15 01:31:53,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356890200] [2019-10-15 01:31:53,871 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 01:31:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:54,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-15 01:31:54,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:31:54,099 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:31:55,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [290453110] [2019-10-15 01:31:55,113 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:31:55,113 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:55,114 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:55,114 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:55,114 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:55,147 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:55,268 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:31:55,284 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:55,288 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:55,690 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:55,690 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27, 27, 11] total 62 [2019-10-15 01:31:55,690 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198786039] [2019-10-15 01:31:55,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-10-15 01:31:55,696 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:55,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-10-15 01:31:55,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=2427, Unknown=0, NotChecked=0, Total=3782 [2019-10-15 01:31:55,698 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 62 states. [2019-10-15 01:32:01,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:01,144 INFO L93 Difference]: Finished difference Result 156 states and 216 transitions. [2019-10-15 01:32:01,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2019-10-15 01:32:01,145 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 58 [2019-10-15 01:32:01,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:01,148 INFO L225 Difference]: With dead ends: 156 [2019-10-15 01:32:01,148 INFO L226 Difference]: Without dead ends: 120 [2019-10-15 01:32:01,156 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7629 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=7779, Invalid=19943, Unknown=0, NotChecked=0, Total=27722 [2019-10-15 01:32:01,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-10-15 01:32:01,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2019-10-15 01:32:01,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-10-15 01:32:01,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2019-10-15 01:32:01,173 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 58 [2019-10-15 01:32:01,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:01,173 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2019-10-15 01:32:01,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-10-15 01:32:01,174 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2019-10-15 01:32:01,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-15 01:32:01,177 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:01,177 INFO L380 BasicCegarLoop]: trace histogram [50, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:01,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:01,382 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:01,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:01,382 INFO L82 PathProgramCache]: Analyzing trace with hash 214185690, now seen corresponding path program 5 times [2019-10-15 01:32:01,383 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:01,383 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658570517] [2019-10-15 01:32:01,383 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:01,384 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:01,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2019-10-15 01:32:02,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658570517] [2019-10-15 01:32:02,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183914767] [2019-10-15 01:32:02,610 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 [2019-10-15 01:32:23,863 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2019-10-15 01:32:23,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:23,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 50 conjunts are in the unsatisfiable core [2019-10-15 01:32:23,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2019-10-15 01:32:23,903 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2019-10-15 01:32:26,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1928384493] [2019-10-15 01:32:26,499 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:32:26,499 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:26,500 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:26,500 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:26,500 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:26,529 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:26,614 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:32:26,632 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:26,635 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:27,120 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:27,121 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51, 11] total 110 [2019-10-15 01:32:27,121 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261141141] [2019-10-15 01:32:27,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 110 states [2019-10-15 01:32:27,123 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:27,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2019-10-15 01:32:27,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4979, Invalid=7011, Unknown=0, NotChecked=0, Total=11990 [2019-10-15 01:32:27,126 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 110 states.