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 -i ../../../trunk/examples/svcomp/recursive-simple/id2_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:27:25,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:27:25,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:27:25,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 06:27:25,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 06:27:25,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 06:27:25,867 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 06:27:25,869 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 06:27:25,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 06:27:25,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 06:27:25,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 06:27:25,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 06:27:25,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:27:25,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:27:25,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:27:25,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:27:25,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:27:25,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:27:25,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:27:25,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:27:25,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:27:25,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:27:25,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:27:25,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:27:25,905 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 06:27:25,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:27:25,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:27:25,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:27:25,916 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 [2019-09-08 06:27:25,951 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:27:25,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:27:25,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:27:25,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:27:25,954 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:27:25,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:27:25,955 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:27:25,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:27:25,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:27:25,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:27:25,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:27:25,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:27:25,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:27:25,956 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:27:25,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:27:25,957 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:27:25,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:27:25,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:27:25,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:27:25,958 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:27:25,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:27:25,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:27:25,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:27:25,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:27:25,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:27:25,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:27:25,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:27:25,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:27:25,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:27:25,997 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:27:26,015 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:27:26,025 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:27:26,027 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:27:26,028 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:27:26,029 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b2_o3.c [2019-09-08 06:27:26,139 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf360100b/31e81ef74ee943d3b246c20553923ca2/FLAG6a2674dd1 [2019-09-08 06:27:26,830 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:27:26,833 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b2_o3.c [2019-09-08 06:27:26,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf360100b/31e81ef74ee943d3b246c20553923ca2/FLAG6a2674dd1 [2019-09-08 06:27:27,109 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf360100b/31e81ef74ee943d3b246c20553923ca2 [2019-09-08 06:27:27,127 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:27:27,129 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:27:27,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:27:27,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:27:27,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:27:27,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:27:27" (1/1) ... [2019-09-08 06:27:27,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f69beb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:27, skipping insertion in model container [2019-09-08 06:27:27,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:27:27" (1/1) ... [2019-09-08 06:27:27,147 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:27:27,166 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:27:27,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:27:27,380 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:27:27,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:27:27,430 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:27:27,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:27 WrapperNode [2019-09-08 06:27:27,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:27:27,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:27:27,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:27:27,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:27:27,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:27" (1/1) ... [2019-09-08 06:27:27,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:27" (1/1) ... [2019-09-08 06:27:27,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:27" (1/1) ... [2019-09-08 06:27:27,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:27" (1/1) ... [2019-09-08 06:27:27,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:27" (1/1) ... [2019-09-08 06:27:27,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:27" (1/1) ... [2019-09-08 06:27:27,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:27" (1/1) ... [2019-09-08 06:27:27,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:27:27,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:27:27,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:27:27,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:27:27,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:27" (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 [2019-09-08 06:27:27,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:27:27,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:27:27,701 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-09-08 06:27:27,701 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2019-09-08 06:27:27,703 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:27:27,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-08 06:27:27,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:27:27,703 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-09-08 06:27:27,704 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2019-09-08 06:27:27,705 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:27:27,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:27:27,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:27:27,945 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:27:27,946 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:27:27,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:27:27 BoogieIcfgContainer [2019-09-08 06:27:27,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:27:27,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:27:27,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:27:27,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:27:27,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:27:27" (1/3) ... [2019-09-08 06:27:27,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ad86f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:27:27, skipping insertion in model container [2019-09-08 06:27:27,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:27" (2/3) ... [2019-09-08 06:27:27,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ad86f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:27:27, skipping insertion in model container [2019-09-08 06:27:27,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:27:27" (3/3) ... [2019-09-08 06:27:27,974 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b2_o3.c [2019-09-08 06:27:28,023 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:27:28,051 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:27:28,092 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:27:28,133 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:27:28,135 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:27:28,135 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:27:28,135 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:27:28,135 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:27:28,135 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:27:28,136 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:27:28,136 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:27:28,136 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:27:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-09-08 06:27:28,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 06:27:28,165 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:28,166 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:28,168 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:28,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:28,174 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2019-09-08 06:27:28,175 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:28,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:28,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:28,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:28,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:27:28,447 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:27:28,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:27:28,451 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:27:28,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:27:28,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:27:28,466 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2019-09-08 06:27:28,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:28,539 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2019-09-08 06:27:28,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:27:28,541 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 06:27:28,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:28,551 INFO L225 Difference]: With dead ends: 40 [2019-09-08 06:27:28,552 INFO L226 Difference]: Without dead ends: 26 [2019-09-08 06:27:28,556 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:27:28,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-08 06:27:28,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-09-08 06:27:28,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-08 06:27:28,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-09-08 06:27:28,611 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2019-09-08 06:27:28,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:28,611 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-09-08 06:27:28,611 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:27:28,612 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-09-08 06:27:28,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-08 06:27:28,614 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:28,614 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:28,615 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:28,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:28,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2019-09-08 06:27:28,616 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:28,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:28,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:28,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:28,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:27:28,736 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:27:28,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:27:28,738 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:27:28,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:27:28,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:27:28,740 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2019-09-08 06:27:28,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:28,763 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-09-08 06:27:28,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:27:28,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-09-08 06:27:28,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:28,766 INFO L225 Difference]: With dead ends: 32 [2019-09-08 06:27:28,766 INFO L226 Difference]: Without dead ends: 28 [2019-09-08 06:27:28,768 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:27:28,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-08 06:27:28,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-09-08 06:27:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-08 06:27:28,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-09-08 06:27:28,777 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2019-09-08 06:27:28,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:28,778 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-09-08 06:27:28,778 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:27:28,778 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-09-08 06:27:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-08 06:27:28,779 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:28,780 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:28,780 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:28,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2019-09-08 06:27:28,781 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:28,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:28,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:28,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:28,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:27:28,980 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:27:28,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-09-08 06:27:28,981 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-08 06:27:28,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-08 06:27:28,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:27:28,982 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2019-09-08 06:27:29,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:29,052 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2019-09-08 06:27:29,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 06:27:29,053 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-09-08 06:27:29,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:29,054 INFO L225 Difference]: With dead ends: 48 [2019-09-08 06:27:29,054 INFO L226 Difference]: Without dead ends: 32 [2019-09-08 06:27:29,056 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:27:29,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-08 06:27:29,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-09-08 06:27:29,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:27:29,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-09-08 06:27:29,064 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2019-09-08 06:27:29,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:29,064 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-09-08 06:27:29,065 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-08 06:27:29,065 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-09-08 06:27:29,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 06:27:29,066 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:29,066 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:29,067 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:29,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:29,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2019-09-08 06:27:29,068 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:29,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:29,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:29,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:29,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 06:27:29,188 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:27:29,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:27:29,189 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:27:29,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:27:29,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:27:29,191 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2019-09-08 06:27:29,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:29,231 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2019-09-08 06:27:29,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:27:29,233 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-09-08 06:27:29,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:29,235 INFO L225 Difference]: With dead ends: 50 [2019-09-08 06:27:29,235 INFO L226 Difference]: Without dead ends: 36 [2019-09-08 06:27:29,237 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:27:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-08 06:27:29,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-09-08 06:27:29,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-08 06:27:29,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-09-08 06:27:29,260 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2019-09-08 06:27:29,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:29,261 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-09-08 06:27:29,266 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:27:29,266 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-09-08 06:27:29,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 06:27:29,268 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:29,269 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:29,270 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:29,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:29,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2019-09-08 06:27:29,271 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:29,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:29,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:29,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:29,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:29,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 06:27:29,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:29,548 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:27:29,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:29,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-08 06:27:29,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 06:27:29,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:29,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-08 06:27:29,754 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:27:29,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:27:29,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:27:29,755 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 12 states. [2019-09-08 06:27:29,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:29,892 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2019-09-08 06:27:29,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:27:29,893 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-09-08 06:27:29,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:29,895 INFO L225 Difference]: With dead ends: 66 [2019-09-08 06:27:29,895 INFO L226 Difference]: Without dead ends: 46 [2019-09-08 06:27:29,896 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:27:29,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-08 06:27:29,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2019-09-08 06:27:29,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-08 06:27:29,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-09-08 06:27:29,905 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2019-09-08 06:27:29,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:29,905 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-09-08 06:27:29,905 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:27:29,906 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-09-08 06:27:29,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-08 06:27:29,907 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:29,907 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:29,908 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:29,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:29,908 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2019-09-08 06:27:29,908 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:29,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:29,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:29,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:29,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-08 06:27:30,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:30,157 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:30,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:30,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-08 06:27:30,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-08 06:27:30,265 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:30,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-08 06:27:30,268 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:27:30,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:27:30,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:27:30,269 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 12 states. [2019-09-08 06:27:30,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:30,398 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2019-09-08 06:27:30,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:27:30,399 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2019-09-08 06:27:30,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:30,402 INFO L225 Difference]: With dead ends: 70 [2019-09-08 06:27:30,402 INFO L226 Difference]: Without dead ends: 52 [2019-09-08 06:27:30,404 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:27:30,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-08 06:27:30,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2019-09-08 06:27:30,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-08 06:27:30,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2019-09-08 06:27:30,414 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 34 [2019-09-08 06:27:30,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:30,414 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2019-09-08 06:27:30,414 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:27:30,415 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2019-09-08 06:27:30,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-08 06:27:30,416 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:30,416 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:30,417 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:30,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:30,417 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2019-09-08 06:27:30,418 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:30,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:30,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:30,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:30,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-08 06:27:30,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:30,670 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:27:30,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:30,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:27:30,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:30,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-08 06:27:30,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:30,839 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-08 06:27:30,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:30,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 15 [2019-09-08 06:27:30,850 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-08 06:27:30,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-08 06:27:30,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2019-09-08 06:27:30,852 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 15 states. [2019-09-08 06:27:31,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:31,052 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2019-09-08 06:27:31,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:27:31,053 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2019-09-08 06:27:31,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:31,054 INFO L225 Difference]: With dead ends: 58 [2019-09-08 06:27:31,054 INFO L226 Difference]: Without dead ends: 0 [2019-09-08 06:27:31,060 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:27:31,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-08 06:27:31,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-08 06:27:31,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-08 06:27:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-08 06:27:31,062 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2019-09-08 06:27:31,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:31,063 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-08 06:27:31,063 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-08 06:27:31,063 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-08 06:27:31,063 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-08 06:27:31,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-08 06:27:31,099 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-09-08 06:27:31,100 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:27:31,100 INFO L443 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2019-09-08 06:27:31,100 INFO L446 ceAbstractionStarter]: At program point L16(line 16) the Hoare annotation is: true [2019-09-08 06:27:31,100 INFO L443 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2019-09-08 06:27:31,100 INFO L443 ceAbstractionStarter]: For program point L16-1(line 16) no Hoare annotation was computed. [2019-09-08 06:27:31,100 INFO L443 ceAbstractionStarter]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2019-09-08 06:27:31,101 INFO L446 ceAbstractionStarter]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2019-09-08 06:27:31,101 INFO L443 ceAbstractionStarter]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2019-09-08 06:27:31,101 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:27:31,101 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-08 06:27:31,101 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-08 06:27:31,101 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-08 06:27:31,102 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2019-09-08 06:27:31,102 INFO L443 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2019-09-08 06:27:31,102 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2019-09-08 06:27:31,102 INFO L443 ceAbstractionStarter]: For program point L24(lines 24 26) no Hoare annotation was computed. [2019-09-08 06:27:31,102 INFO L446 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: true [2019-09-08 06:27:31,103 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2019-09-08 06:27:31,104 INFO L443 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-09-08 06:27:31,104 INFO L443 ceAbstractionStarter]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2019-09-08 06:27:31,104 INFO L443 ceAbstractionStarter]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2019-09-08 06:27:31,104 INFO L443 ceAbstractionStarter]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2019-09-08 06:27:31,105 INFO L443 ceAbstractionStarter]: For program point L10(line 10) no Hoare annotation was computed. [2019-09-08 06:27:31,105 INFO L446 ceAbstractionStarter]: At program point L9(line 9) the Hoare annotation is: true [2019-09-08 06:27:31,105 INFO L443 ceAbstractionStarter]: For program point L8(line 8) no Hoare annotation was computed. [2019-09-08 06:27:31,105 INFO L443 ceAbstractionStarter]: For program point L9-1(line 9) no Hoare annotation was computed. [2019-09-08 06:27:31,106 INFO L446 ceAbstractionStarter]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2019-09-08 06:27:31,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.09 06:27:31 BoogieIcfgContainer [2019-09-08 06:27:31,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-08 06:27:31,118 INFO L168 Benchmark]: Toolchain (without parser) took 3985.77 ms. Allocated memory was 133.7 MB in the beginning and 257.9 MB in the end (delta: 124.3 MB). Free memory was 89.1 MB in the beginning and 220.9 MB in the end (delta: -131.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-09-08 06:27:31,119 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 133.7 MB. Free memory was 107.0 MB in the beginning and 106.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-08 06:27:31,122 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.15 ms. Allocated memory is still 133.7 MB. Free memory was 88.9 MB in the beginning and 79.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:31,124 INFO L168 Benchmark]: Boogie Preprocessor took 204.67 ms. Allocated memory was 133.7 MB in the beginning and 202.9 MB in the end (delta: 69.2 MB). Free memory was 79.5 MB in the beginning and 179.7 MB in the end (delta: -100.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:31,125 INFO L168 Benchmark]: RCFGBuilder took 310.50 ms. Allocated memory is still 202.9 MB. Free memory was 179.1 MB in the beginning and 167.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:31,133 INFO L168 Benchmark]: TraceAbstraction took 3152.00 ms. Allocated memory was 202.9 MB in the beginning and 257.9 MB in the end (delta: 55.1 MB). Free memory was 167.0 MB in the beginning and 220.9 MB in the end (delta: -53.9 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:31,141 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 133.7 MB. Free memory was 107.0 MB in the beginning and 106.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 302.15 ms. Allocated memory is still 133.7 MB. Free memory was 88.9 MB in the beginning and 79.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 204.67 ms. Allocated memory was 133.7 MB in the beginning and 202.9 MB in the end (delta: 69.2 MB). Free memory was 79.5 MB in the beginning and 179.7 MB in the end (delta: -100.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 310.50 ms. Allocated memory is still 202.9 MB. Free memory was 179.1 MB in the beginning and 167.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3152.00 ms. Allocated memory was 202.9 MB in the beginning and 257.9 MB in the end (delta: 55.1 MB). Free memory was 167.0 MB in the beginning and 220.9 MB in the end (delta: -53.9 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. SAFE Result, 2.9s OverallTime, 7 OverallIterations, 3 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 206 SDtfs, 24 SDslu, 1272 SDs, 0 SdLazy, 284 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 162 GetRequests, 101 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 20 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 284 NumberOfCodeBlocks, 284 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 274 ConstructedInterpolants, 0 QuantifiedInterpolants, 26270 SizeOfPredicates, 10 NumberOfNonLiveVariables, 225 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 54/78 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...