java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength2_false-valid-deref-read.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 10:27:20,960 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 10:27:20,961 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 10:27:20,976 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 10:27:20,976 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 10:27:20,977 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 10:27:20,977 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 10:27:20,979 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 10:27:20,980 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 10:27:20,981 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 10:27:20,982 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 10:27:20,982 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 10:27:20,982 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 10:27:20,984 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 10:27:20,985 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 10:27:20,987 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 10:27:20,989 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 10:27:20,991 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 10:27:20,992 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 10:27:20,994 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 10:27:20,996 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-21 10:27:20,996 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-21 10:27:20,997 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-21 10:27:20,998 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-21 10:27:20,998 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-21 10:27:21,000 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-21 10:27:21,000 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-21 10:27:21,001 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-21 10:27:21,001 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-21 10:27:21,001 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 10:27:21,002 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 10:27:21,002 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf [2018-01-21 10:27:21,012 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 10:27:21,012 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 10:27:21,013 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 10:27:21,013 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 10:27:21,014 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 10:27:21,014 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 10:27:21,014 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 10:27:21,014 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 10:27:21,015 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 10:27:21,015 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 10:27:21,015 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 10:27:21,016 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 10:27:21,016 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 10:27:21,016 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 10:27:21,016 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 10:27:21,016 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 10:27:21,017 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 10:27:21,017 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 10:27:21,017 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 10:27:21,017 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 10:27:21,017 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 10:27:21,018 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 10:27:21,018 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 10:27:21,018 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 10:27:21,018 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 10:27:21,018 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 10:27:21,019 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 10:27:21,019 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 10:27:21,019 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 10:27:21,019 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 10:27:21,019 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 10:27:21,020 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 10:27:21,020 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 10:27:21,020 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 10:27:21,020 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 10:27:21,020 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 10:27:21,020 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 10:27:21,021 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 10:27:21,022 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 10:27:21,056 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 10:27:21,069 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 10:27:21,073 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 10:27:21,075 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 10:27:21,076 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 10:27:21,076 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength2_false-valid-deref-read.c [2018-01-21 10:27:21,192 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 10:27:21,195 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 10:27:21,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 10:27:21,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 10:27:21,203 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 10:27:21,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 10:27:21" (1/1) ... [2018-01-21 10:27:21,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5274b3a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:27:21, skipping insertion in model container [2018-01-21 10:27:21,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 10:27:21" (1/1) ... [2018-01-21 10:27:21,254 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 10:27:21,273 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 10:27:21,384 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 10:27:21,399 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 10:27:21,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:27:21 WrapperNode [2018-01-21 10:27:21,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 10:27:21,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 10:27:21,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 10:27:21,408 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 10:27:21,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:27:21" (1/1) ... [2018-01-21 10:27:21,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:27:21" (1/1) ... [2018-01-21 10:27:21,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:27:21" (1/1) ... [2018-01-21 10:27:21,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:27:21" (1/1) ... [2018-01-21 10:27:21,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:27:21" (1/1) ... [2018-01-21 10:27:21,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:27:21" (1/1) ... [2018-01-21 10:27:21,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:27:21" (1/1) ... [2018-01-21 10:27:21,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 10:27:21,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 10:27:21,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 10:27:21,451 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 10:27:21,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:27:21" (1/1) ... No working directory specified, using /storage/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 [2018-01-21 10:27:21,513 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 10:27:21,513 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 10:27:21,513 INFO L136 BoogieDeclarations]: Found implementation of procedure bar [2018-01-21 10:27:21,513 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-21 10:27:21,514 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 10:27:21,514 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 10:27:21,514 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 10:27:21,514 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 10:27:21,514 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 10:27:21,514 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 10:27:21,515 INFO L128 BoogieDeclarations]: Found specification of procedure bar [2018-01-21 10:27:21,515 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-21 10:27:21,515 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 10:27:21,515 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 10:27:21,515 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 10:27:21,756 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 10:27:21,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 10:27:21 BoogieIcfgContainer [2018-01-21 10:27:21,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 10:27:21,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 10:27:21,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 10:27:21,761 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 10:27:21,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 10:27:21" (1/3) ... [2018-01-21 10:27:21,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f8a3546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 10:27:21, skipping insertion in model container [2018-01-21 10:27:21,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:27:21" (2/3) ... [2018-01-21 10:27:21,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f8a3546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 10:27:21, skipping insertion in model container [2018-01-21 10:27:21,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 10:27:21" (3/3) ... [2018-01-21 10:27:21,765 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2_false-valid-deref-read.c [2018-01-21 10:27:21,773 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 10:27:21,782 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-01-21 10:27:21,818 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 10:27:21,818 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 10:27:21,818 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 10:27:21,818 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 10:27:21,818 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 10:27:21,818 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 10:27:21,818 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 10:27:21,818 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == barErr0EnsuresViolation======== [2018-01-21 10:27:21,819 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 10:27:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-21 10:27:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-21 10:27:21,843 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:27:21,844 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:27:21,844 INFO L371 AbstractCegarLoop]: === Iteration 1 === [barErr0EnsuresViolation]=== [2018-01-21 10:27:21,848 INFO L82 PathProgramCache]: Analyzing trace with hash -492377012, now seen corresponding path program 1 times [2018-01-21 10:27:21,851 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:27:21,891 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:21,891 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:27:21,891 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:21,891 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:27:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:21,949 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:27:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 10:27:21,995 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:27:21,995 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 10:27:21,996 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:27:21,999 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 10:27:22,012 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 10:27:22,013 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 10:27:22,014 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2018-01-21 10:27:22,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:27:22,042 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2018-01-21 10:27:22,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 10:27:22,043 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2018-01-21 10:27:22,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:27:22,049 INFO L225 Difference]: With dead ends: 114 [2018-01-21 10:27:22,049 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 10:27:22,053 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 10:27:22,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 10:27:22,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 10:27:22,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 10:27:22,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 10:27:22,075 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2018-01-21 10:27:22,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:27:22,076 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 10:27:22,076 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 10:27:22,076 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 10:27:22,076 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 10:27:22,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-01-21 10:27:22,182 INFO L404 ceAbstractionStarter]: At program point L13'''(lines 13 15) the Hoare annotation is: true [2018-01-21 10:27:22,182 INFO L401 ceAbstractionStarter]: For program point barErr0EnsuresViolation(lines 11 17) no Hoare annotation was computed. [2018-01-21 10:27:22,182 INFO L401 ceAbstractionStarter]: For program point L13''(lines 13 15) no Hoare annotation was computed. [2018-01-21 10:27:22,182 INFO L401 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-01-21 10:27:22,182 INFO L401 ceAbstractionStarter]: For program point L13(lines 13 15) no Hoare annotation was computed. [2018-01-21 10:27:22,182 INFO L404 ceAbstractionStarter]: At program point barENTRY(lines 11 17) the Hoare annotation is: true [2018-01-21 10:27:22,182 INFO L401 ceAbstractionStarter]: For program point L13''''(lines 13 15) no Hoare annotation was computed. [2018-01-21 10:27:22,183 INFO L401 ceAbstractionStarter]: For program point barFINAL(lines 11 17) no Hoare annotation was computed. [2018-01-21 10:27:22,183 INFO L401 ceAbstractionStarter]: For program point L14'(line 14) no Hoare annotation was computed. [2018-01-21 10:27:22,183 INFO L401 ceAbstractionStarter]: For program point barEXIT(lines 11 17) no Hoare annotation was computed. [2018-01-21 10:27:22,183 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initErr0EnsuresViolation(lines 1 43) no Hoare annotation was computed. [2018-01-21 10:27:22,183 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 43) no Hoare annotation was computed. [2018-01-21 10:27:22,183 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 43) the Hoare annotation is: true [2018-01-21 10:27:22,184 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 43) no Hoare annotation was computed. [2018-01-21 10:27:22,184 INFO L401 ceAbstractionStarter]: For program point fooEXIT(lines 20 29) no Hoare annotation was computed. [2018-01-21 10:27:22,184 INFO L401 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-01-21 10:27:22,184 INFO L401 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2018-01-21 10:27:22,184 INFO L401 ceAbstractionStarter]: For program point L22(lines 22 24) no Hoare annotation was computed. [2018-01-21 10:27:22,184 INFO L401 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2018-01-21 10:27:22,184 INFO L401 ceAbstractionStarter]: For program point L23'(line 23) no Hoare annotation was computed. [2018-01-21 10:27:22,185 INFO L401 ceAbstractionStarter]: For program point L21'''''(line 21) no Hoare annotation was computed. [2018-01-21 10:27:22,185 INFO L401 ceAbstractionStarter]: For program point L25'(lines 25 27) no Hoare annotation was computed. [2018-01-21 10:27:22,185 INFO L401 ceAbstractionStarter]: For program point L21'''(line 21) no Hoare annotation was computed. [2018-01-21 10:27:22,185 INFO L401 ceAbstractionStarter]: For program point L21'(line 21) no Hoare annotation was computed. [2018-01-21 10:27:22,185 INFO L401 ceAbstractionStarter]: For program point fooFINAL(lines 20 29) no Hoare annotation was computed. [2018-01-21 10:27:22,185 INFO L404 ceAbstractionStarter]: At program point fooENTRY(lines 20 29) the Hoare annotation is: true [2018-01-21 10:27:22,186 INFO L401 ceAbstractionStarter]: For program point L22''(lines 22 24) no Hoare annotation was computed. [2018-01-21 10:27:22,186 INFO L401 ceAbstractionStarter]: For program point L23''(line 23) no Hoare annotation was computed. [2018-01-21 10:27:22,186 INFO L401 ceAbstractionStarter]: For program point L21''(line 21) no Hoare annotation was computed. [2018-01-21 10:27:22,186 INFO L404 ceAbstractionStarter]: At program point L22''''(lines 22 24) the Hoare annotation is: true [2018-01-21 10:27:22,186 INFO L404 ceAbstractionStarter]: At program point L22'''(lines 22 24) the Hoare annotation is: true [2018-01-21 10:27:22,186 INFO L401 ceAbstractionStarter]: For program point fooErr0EnsuresViolation(lines 20 29) no Hoare annotation was computed. [2018-01-21 10:27:22,186 INFO L401 ceAbstractionStarter]: For program point L21''''(line 21) no Hoare annotation was computed. [2018-01-21 10:27:22,187 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 43) the Hoare annotation is: true [2018-01-21 10:27:22,187 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 43) no Hoare annotation was computed. [2018-01-21 10:27:22,187 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 43) the Hoare annotation is: true [2018-01-21 10:27:22,187 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startErr0EnsuresViolation(lines 1 43) no Hoare annotation was computed. [2018-01-21 10:27:22,187 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 43) no Hoare annotation was computed. [2018-01-21 10:27:22,187 INFO L404 ceAbstractionStarter]: At program point L36''(lines 36 40) the Hoare annotation is: true [2018-01-21 10:27:22,188 INFO L401 ceAbstractionStarter]: For program point L33''(lines 33 35) no Hoare annotation was computed. [2018-01-21 10:27:22,188 INFO L401 ceAbstractionStarter]: For program point L34''(line 34) no Hoare annotation was computed. [2018-01-21 10:27:22,188 INFO L404 ceAbstractionStarter]: At program point L33'''(lines 33 35) the Hoare annotation is: true [2018-01-21 10:27:22,188 INFO L401 ceAbstractionStarter]: For program point L32''(line 32) no Hoare annotation was computed. [2018-01-21 10:27:22,188 INFO L401 ceAbstractionStarter]: For program point L37'(line 37) no Hoare annotation was computed. [2018-01-21 10:27:22,188 INFO L401 ceAbstractionStarter]: For program point L32''''(line 32) no Hoare annotation was computed. [2018-01-21 10:27:22,188 INFO L401 ceAbstractionStarter]: For program point L32'''''(line 32) no Hoare annotation was computed. [2018-01-21 10:27:22,189 INFO L401 ceAbstractionStarter]: For program point mainErr0EnsuresViolation(lines 31 42) no Hoare annotation was computed. [2018-01-21 10:27:22,189 INFO L401 ceAbstractionStarter]: For program point L36'''(lines 36 40) no Hoare annotation was computed. [2018-01-21 10:27:22,189 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 31 42) no Hoare annotation was computed. [2018-01-21 10:27:22,189 INFO L401 ceAbstractionStarter]: For program point L32(line 32) no Hoare annotation was computed. [2018-01-21 10:27:22,189 INFO L401 ceAbstractionStarter]: For program point L32'''(line 32) no Hoare annotation was computed. [2018-01-21 10:27:22,189 INFO L404 ceAbstractionStarter]: At program point L34(line 34) the Hoare annotation is: true [2018-01-21 10:27:22,189 INFO L401 ceAbstractionStarter]: For program point L33(lines 33 35) no Hoare annotation was computed. [2018-01-21 10:27:22,190 INFO L401 ceAbstractionStarter]: For program point L34'''(line 34) no Hoare annotation was computed. [2018-01-21 10:27:22,190 INFO L401 ceAbstractionStarter]: For program point L33''''(lines 33 35) no Hoare annotation was computed. [2018-01-21 10:27:22,190 INFO L401 ceAbstractionStarter]: For program point L36(lines 36 40) no Hoare annotation was computed. [2018-01-21 10:27:22,190 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 31 42) no Hoare annotation was computed. [2018-01-21 10:27:22,190 INFO L404 ceAbstractionStarter]: At program point mainENTRY(lines 31 42) the Hoare annotation is: true [2018-01-21 10:27:22,190 INFO L401 ceAbstractionStarter]: For program point L38(line 38) no Hoare annotation was computed. [2018-01-21 10:27:22,191 INFO L401 ceAbstractionStarter]: For program point L37(line 37) no Hoare annotation was computed. [2018-01-21 10:27:22,191 INFO L401 ceAbstractionStarter]: For program point L34'(line 34) no Hoare annotation was computed. [2018-01-21 10:27:22,191 INFO L401 ceAbstractionStarter]: For program point L32'(line 32) no Hoare annotation was computed. [2018-01-21 10:27:22,195 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 10:27:22,195 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 10:27:22,195 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 10:27:22,195 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 10:27:22,195 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 10:27:22,195 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 10:27:22,196 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 10:27:22,196 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 10:27:22,196 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 10:27:22,198 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-21 10:27:22,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 10:27:22,199 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:27:22,199 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 10:27:22,199 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 10:27:22,199 INFO L82 PathProgramCache]: Analyzing trace with hash 136143, now seen corresponding path program 1 times [2018-01-21 10:27:22,199 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:27:22,201 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:22,201 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:27:22,201 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:22,201 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:27:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 10:27:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 10:27:22,232 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 10:27:22,237 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:27:22,241 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 10:27:22,242 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 10:27:22,242 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 10:27:22,242 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 10:27:22,242 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 10:27:22,242 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 10:27:22,242 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 10:27:22,242 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-21 10:27:22,242 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 10:27:22,244 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-21 10:27:22,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-21 10:27:22,245 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:27:22,245 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:27:22,245 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-21 10:27:22,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1220349549, now seen corresponding path program 1 times [2018-01-21 10:27:22,245 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:27:22,246 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:22,246 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:27:22,246 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:22,246 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:27:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:22,262 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:27:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 10:27:22,283 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:27:22,283 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 10:27:22,283 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:27:22,283 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 10:27:22,284 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 10:27:22,284 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 10:27:22,284 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2018-01-21 10:27:22,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:27:22,293 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2018-01-21 10:27:22,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 10:27:22,293 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2018-01-21 10:27:22,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:27:22,296 INFO L225 Difference]: With dead ends: 114 [2018-01-21 10:27:22,296 INFO L226 Difference]: Without dead ends: 43 [2018-01-21 10:27:22,297 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 10:27:22,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-21 10:27:22,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-21 10:27:22,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-21 10:27:22,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2018-01-21 10:27:22,311 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2018-01-21 10:27:22,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:27:22,311 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2018-01-21 10:27:22,311 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 10:27:22,312 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2018-01-21 10:27:22,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 10:27:22,313 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:27:22,313 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:27:22,313 INFO L371 AbstractCegarLoop]: === Iteration 2 === [fooErr0EnsuresViolation]=== [2018-01-21 10:27:22,314 INFO L82 PathProgramCache]: Analyzing trace with hash 390316661, now seen corresponding path program 1 times [2018-01-21 10:27:22,314 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:27:22,315 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:22,315 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:27:22,315 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:22,316 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:27:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:22,342 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:27:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 10:27:22,458 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:27:22,458 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-21 10:27:22,458 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:27:22,459 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 10:27:22,460 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 10:27:22,460 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-21 10:27:22,460 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 7 states. [2018-01-21 10:27:22,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:27:22,624 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2018-01-21 10:27:22,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-21 10:27:22,625 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2018-01-21 10:27:22,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:27:22,629 INFO L225 Difference]: With dead ends: 112 [2018-01-21 10:27:22,629 INFO L226 Difference]: Without dead ends: 77 [2018-01-21 10:27:22,631 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-01-21 10:27:22,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-01-21 10:27:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2018-01-21 10:27:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-01-21 10:27:22,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2018-01-21 10:27:22,648 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 28 [2018-01-21 10:27:22,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:27:22,649 INFO L432 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2018-01-21 10:27:22,649 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 10:27:22,649 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2018-01-21 10:27:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-21 10:27:22,651 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:27:22,651 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:27:22,651 INFO L371 AbstractCegarLoop]: === Iteration 3 === [fooErr0EnsuresViolation]=== [2018-01-21 10:27:22,651 INFO L82 PathProgramCache]: Analyzing trace with hash 2078164222, now seen corresponding path program 1 times [2018-01-21 10:27:22,651 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:27:22,652 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:22,652 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:27:22,652 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:22,652 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:27:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:22,674 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:27:22,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 10:27:22,741 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:27:22,741 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 10:27:22,742 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:27:22,742 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 10:27:22,742 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 10:27:22,742 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 10:27:22,743 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 4 states. [2018-01-21 10:27:22,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:27:22,840 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2018-01-21 10:27:22,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 10:27:22,841 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2018-01-21 10:27:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:27:22,842 INFO L225 Difference]: With dead ends: 69 [2018-01-21 10:27:22,842 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 10:27:22,843 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 10:27:22,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 10:27:22,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 10:27:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 10:27:22,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 10:27:22,844 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2018-01-21 10:27:22,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:27:22,844 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 10:27:22,844 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 10:27:22,844 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 10:27:22,844 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 10:27:22,846 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 10:27:22,846 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 10:27:22,847 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 10:27:22,847 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 10:27:22,847 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 10:27:22,847 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 10:27:22,847 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 10:27:22,847 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 10:27:22,847 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 10:27:22,849 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-21 10:27:22,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-21 10:27:22,850 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:27:22,850 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:27:22,850 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:27:22,850 INFO L82 PathProgramCache]: Analyzing trace with hash -851979775, now seen corresponding path program 1 times [2018-01-21 10:27:22,850 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:27:22,851 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:22,851 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:27:22,852 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:22,852 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:27:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:22,857 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:27:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 10:27:22,864 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:27:22,864 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 10:27:22,864 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:27:22,864 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 10:27:22,865 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 10:27:22,865 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 10:27:22,865 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2018-01-21 10:27:22,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:27:22,871 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2018-01-21 10:27:22,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 10:27:22,871 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-21 10:27:22,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:27:22,872 INFO L225 Difference]: With dead ends: 114 [2018-01-21 10:27:22,872 INFO L226 Difference]: Without dead ends: 57 [2018-01-21 10:27:22,873 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 10:27:22,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-21 10:27:22,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-01-21 10:27:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-21 10:27:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2018-01-21 10:27:22,879 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 17 [2018-01-21 10:27:22,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:27:22,879 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2018-01-21 10:27:22,879 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 10:27:22,879 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2018-01-21 10:27:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 10:27:22,880 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:27:22,880 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:27:22,880 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:27:22,880 INFO L82 PathProgramCache]: Analyzing trace with hash -178858898, now seen corresponding path program 1 times [2018-01-21 10:27:22,881 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:27:22,881 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:22,882 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:27:22,882 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:22,882 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:27:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:22,888 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:27:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 10:27:22,907 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:27:22,907 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 10:27:22,907 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:27:22,908 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 10:27:22,908 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 10:27:22,908 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 10:27:22,908 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 3 states. [2018-01-21 10:27:22,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:27:22,929 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2018-01-21 10:27:22,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 10:27:22,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-21 10:27:22,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:27:22,930 INFO L225 Difference]: With dead ends: 76 [2018-01-21 10:27:22,930 INFO L226 Difference]: Without dead ends: 61 [2018-01-21 10:27:22,931 INFO L525 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 [2018-01-21 10:27:22,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-21 10:27:22,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2018-01-21 10:27:22,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-21 10:27:22,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2018-01-21 10:27:22,935 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 19 [2018-01-21 10:27:22,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:27:22,936 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2018-01-21 10:27:22,936 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 10:27:22,936 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2018-01-21 10:27:22,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-21 10:27:22,937 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:27:22,937 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:27:22,937 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:27:22,938 INFO L82 PathProgramCache]: Analyzing trace with hash -853032378, now seen corresponding path program 1 times [2018-01-21 10:27:22,938 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:27:22,938 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:22,939 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:27:22,939 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:22,939 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:27:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:22,955 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:27:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 10:27:22,994 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:22,994 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 10:27:22,995 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 47 with the following transitions: [2018-01-21 10:27:22,997 INFO L201 CegarAbsIntRunner]: [0], [4], [7], [17], [18], [20], [21], [23], [24], [25], [29], [32], [44], [50], [51], [52], [53], [58], [59], [60], [61], [65], [68], [70], [72], [73], [74], [76], [80], [84], [89], [90], [93], [95], [96], [97], [106], [108], [109], [110], [111], [112], [113], [114], [115] [2018-01-21 10:27:23,045 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 10:27:23,045 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 10:27:23,930 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 10:27:23,931 INFO L268 AbstractInterpreter]: Visited 45 different actions 81 times. Merged at 17 different actions 17 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 23 variables. [2018-01-21 10:27:23,940 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 10:27:23,940 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:23,940 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/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) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 10:27:23,951 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:27:23,952 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 10:27:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:23,990 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 10:27:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 10:27:24,088 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 10:27:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 10:27:24,440 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-01-21 10:27:24,440 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 11 [2018-01-21 10:27:24,441 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:27:24,441 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 10:27:24,441 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 10:27:24,441 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-01-21 10:27:24,442 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 7 states. [2018-01-21 10:27:24,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:27:24,525 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2018-01-21 10:27:24,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-21 10:27:24,526 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2018-01-21 10:27:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:27:24,527 INFO L225 Difference]: With dead ends: 118 [2018-01-21 10:27:24,527 INFO L226 Difference]: Without dead ends: 61 [2018-01-21 10:27:24,527 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-01-21 10:27:24,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-21 10:27:24,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2018-01-21 10:27:24,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-21 10:27:24,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2018-01-21 10:27:24,531 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 46 [2018-01-21 10:27:24,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:27:24,532 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2018-01-21 10:27:24,532 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 10:27:24,532 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2018-01-21 10:27:24,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-01-21 10:27:24,533 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:27:24,533 INFO L322 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:27:24,533 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:27:24,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1793846129, now seen corresponding path program 1 times [2018-01-21 10:27:24,534 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:27:24,534 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:24,534 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:27:24,534 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:24,535 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:27:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:24,549 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:27:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 10:27:24,604 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:24,605 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 10:27:24,605 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 52 with the following transitions: [2018-01-21 10:27:24,605 INFO L201 CegarAbsIntRunner]: [0], [4], [7], [9], [10], [11], [13], [17], [18], [20], [21], [23], [24], [25], [29], [32], [44], [50], [51], [52], [53], [58], [59], [60], [61], [65], [68], [70], [72], [73], [74], [76], [80], [84], [89], [90], [93], [95], [96], [97], [106], [108], [109], [110], [111], [112], [113], [114], [115] [2018-01-21 10:27:24,607 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 10:27:24,607 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 10:27:25,335 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 10:27:25,335 INFO L268 AbstractInterpreter]: Visited 49 different actions 111 times. Merged at 27 different actions 37 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 23 variables. [2018-01-21 10:27:25,337 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 10:27:25,337 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:25,337 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/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 [2018-01-21 10:27:25,349 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:27:25,350 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 10:27:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:25,385 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 10:27:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 10:27:25,398 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 10:27:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 10:27:25,475 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:25,475 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 4 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 10:27:25,482 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:27:25,482 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 10:27:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:25,537 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 10:27:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 10:27:25,544 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 10:27:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 10:27:25,584 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 10:27:25,584 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 7 [2018-01-21 10:27:25,584 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 10:27:25,584 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 10:27:25,585 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 10:27:25,585 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-21 10:27:25,585 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 5 states. [2018-01-21 10:27:25,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:27:25,616 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2018-01-21 10:27:25,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 10:27:25,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2018-01-21 10:27:25,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:27:25,618 INFO L225 Difference]: With dead ends: 82 [2018-01-21 10:27:25,618 INFO L226 Difference]: Without dead ends: 70 [2018-01-21 10:27:25,619 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-21 10:27:25,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-01-21 10:27:25,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2018-01-21 10:27:25,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-01-21 10:27:25,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2018-01-21 10:27:25,627 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 51 [2018-01-21 10:27:25,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:27:25,628 INFO L432 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2018-01-21 10:27:25,628 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 10:27:25,628 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2018-01-21 10:27:25,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-01-21 10:27:25,631 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:27:25,631 INFO L322 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2018-01-21 10:27:25,631 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:27:25,631 INFO L82 PathProgramCache]: Analyzing trace with hash 988850019, now seen corresponding path program 2 times [2018-01-21 10:27:25,631 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:27:25,632 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:25,632 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:27:25,633 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:25,633 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:27:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:25,656 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:27:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-01-21 10:27:25,745 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:25,745 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 10:27:25,745 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 10:27:25,745 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 10:27:25,745 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:25,746 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 10:27:25,754 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 10:27:25,754 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 10:27:25,773 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 10:27:25,792 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 10:27:25,796 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 10:27:25,801 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 10:27:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-01-21 10:27:25,886 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 10:27:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-01-21 10:27:26,184 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-01-21 10:27:26,184 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5] total 12 [2018-01-21 10:27:26,184 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:27:26,185 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 10:27:26,185 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 10:27:26,185 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-01-21 10:27:26,185 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 7 states. [2018-01-21 10:27:26,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:27:26,264 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2018-01-21 10:27:26,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-21 10:27:26,264 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2018-01-21 10:27:26,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:27:26,266 INFO L225 Difference]: With dead ends: 128 [2018-01-21 10:27:26,266 INFO L226 Difference]: Without dead ends: 80 [2018-01-21 10:27:26,267 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-01-21 10:27:26,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-01-21 10:27:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2018-01-21 10:27:26,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-21 10:27:26,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2018-01-21 10:27:26,276 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 81 [2018-01-21 10:27:26,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:27:26,277 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2018-01-21 10:27:26,277 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 10:27:26,277 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2018-01-21 10:27:26,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-01-21 10:27:26,279 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:27:26,279 INFO L322 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:27:26,279 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:27:26,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1383712123, now seen corresponding path program 1 times [2018-01-21 10:27:26,280 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:27:26,280 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:26,281 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 10:27:26,281 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:26,281 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:27:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:26,303 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:27:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-01-21 10:27:26,385 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:26,385 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 10:27:26,386 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 88 with the following transitions: [2018-01-21 10:27:26,386 INFO L201 CegarAbsIntRunner]: [0], [4], [7], [9], [10], [11], [13], [17], [18], [20], [21], [23], [24], [25], [29], [32], [34], [35], [36], [37], [39], [44], [50], [51], [52], [53], [58], [59], [60], [61], [65], [68], [70], [72], [73], [74], [76], [80], [84], [89], [90], [93], [95], [96], [97], [106], [108], [109], [110], [111], [112], [113], [114], [115] [2018-01-21 10:27:26,388 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 10:27:26,388 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 10:27:30,394 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 10:27:30,394 INFO L268 AbstractInterpreter]: Visited 54 different actions 247 times. Merged at 38 different actions 115 times. Never widened. Found 20 fixpoints after 6 different actions. Largest state had 25 variables. [2018-01-21 10:27:30,401 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 10:27:30,401 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:30,401 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 10:27:30,416 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:27:30,417 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 10:27:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:30,456 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 10:27:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-01-21 10:27:30,544 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 10:27:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-01-21 10:27:30,893 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:30,893 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 7 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 10:27:30,896 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:27:30,897 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 10:27:30,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:30,951 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 10:27:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-01-21 10:27:30,971 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 10:27:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-01-21 10:27:31,058 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 10:27:31,058 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9, 5, 5] total 19 [2018-01-21 10:27:31,058 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 10:27:31,059 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-21 10:27:31,059 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-21 10:27:31,060 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2018-01-21 10:27:31,060 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand 12 states. [2018-01-21 10:27:31,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:27:31,294 INFO L93 Difference]: Finished difference Result 187 states and 215 transitions. [2018-01-21 10:27:31,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-21 10:27:31,328 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2018-01-21 10:27:31,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:27:31,329 INFO L225 Difference]: With dead ends: 187 [2018-01-21 10:27:31,329 INFO L226 Difference]: Without dead ends: 119 [2018-01-21 10:27:31,330 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 329 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2018-01-21 10:27:31,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-01-21 10:27:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 100. [2018-01-21 10:27:31,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-01-21 10:27:31,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2018-01-21 10:27:31,343 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 87 [2018-01-21 10:27:31,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:27:31,344 INFO L432 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2018-01-21 10:27:31,344 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-21 10:27:31,344 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2018-01-21 10:27:31,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-01-21 10:27:31,346 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:27:31,346 INFO L322 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:27:31,346 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:27:31,346 INFO L82 PathProgramCache]: Analyzing trace with hash -762611473, now seen corresponding path program 2 times [2018-01-21 10:27:31,346 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:27:31,347 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:31,347 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:27:31,347 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:31,347 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:27:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:31,379 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:27:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2018-01-21 10:27:31,547 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:31,547 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 10:27:31,547 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 10:27:31,547 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 10:27:31,547 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:31,547 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 10:27:31,552 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 10:27:31,553 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 10:27:31,567 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 10:27:31,589 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 10:27:31,592 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 10:27:31,597 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 10:27:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-01-21 10:27:31,644 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 10:27:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-01-21 10:27:31,785 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:31,785 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 9 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 10:27:31,788 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 10:27:31,788 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 10:27:31,805 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 10:27:31,837 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 10:27:31,864 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 10:27:31,870 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 10:27:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2018-01-21 10:27:31,893 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 10:27:31,982 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2018-01-21 10:27:31,983 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 10:27:31,983 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9, 6, 6] total 21 [2018-01-21 10:27:31,984 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 10:27:31,984 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-21 10:27:31,984 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-21 10:27:31,985 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2018-01-21 10:27:31,985 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 13 states. [2018-01-21 10:27:32,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:27:32,176 INFO L93 Difference]: Finished difference Result 265 states and 302 transitions. [2018-01-21 10:27:32,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-21 10:27:32,176 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 133 [2018-01-21 10:27:32,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:27:32,179 INFO L225 Difference]: With dead ends: 265 [2018-01-21 10:27:32,179 INFO L226 Difference]: Without dead ends: 191 [2018-01-21 10:27:32,180 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 515 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2018-01-21 10:27:32,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-01-21 10:27:32,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 133. [2018-01-21 10:27:32,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-01-21 10:27:32,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2018-01-21 10:27:32,194 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 133 [2018-01-21 10:27:32,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:27:32,194 INFO L432 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2018-01-21 10:27:32,195 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-21 10:27:32,195 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2018-01-21 10:27:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-01-21 10:27:32,197 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:27:32,198 INFO L322 BasicCegarLoop]: trace histogram [11, 9, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:27:32,198 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:27:32,198 INFO L82 PathProgramCache]: Analyzing trace with hash 177172698, now seen corresponding path program 3 times [2018-01-21 10:27:32,198 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:27:32,199 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:32,199 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 10:27:32,199 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:32,199 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:27:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:32,237 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:27:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2018-01-21 10:27:32,349 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:32,349 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 10:27:32,349 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 10:27:32,349 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 10:27:32,350 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:32,350 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 10:27:32,359 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 10:27:32,360 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 10:27:32,383 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 10:27:32,391 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 10:27:32,403 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 10:27:32,420 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 10:27:32,423 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 10:27:32,431 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 10:27:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 107 proven. 10 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2018-01-21 10:27:32,534 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 10:27:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 107 proven. 10 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2018-01-21 10:27:32,907 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:32,907 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 11 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 10:27:32,910 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 10:27:32,910 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 10:27:32,929 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 10:27:32,942 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 10:27:32,970 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 10:27:33,028 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 10:27:33,052 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 10:27:33,060 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 10:27:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 194 proven. 9 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2018-01-21 10:27:33,135 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 10:27:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 194 proven. 9 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2018-01-21 10:27:33,415 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 10:27:33,416 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9, 10, 10] total 28 [2018-01-21 10:27:33,416 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 10:27:33,417 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-21 10:27:33,417 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-21 10:27:33,417 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2018-01-21 10:27:33,418 INFO L87 Difference]: Start difference. First operand 133 states and 147 transitions. Second operand 12 states. [2018-01-21 10:27:33,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:27:33,635 INFO L93 Difference]: Finished difference Result 297 states and 345 transitions. [2018-01-21 10:27:33,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-21 10:27:33,635 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 186 [2018-01-21 10:27:33,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:27:33,637 INFO L225 Difference]: With dead ends: 297 [2018-01-21 10:27:33,638 INFO L226 Difference]: Without dead ends: 285 [2018-01-21 10:27:33,638 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 757 GetRequests, 723 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2018-01-21 10:27:33,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-01-21 10:27:33,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 187. [2018-01-21 10:27:33,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-01-21 10:27:33,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 211 transitions. [2018-01-21 10:27:33,653 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 211 transitions. Word has length 186 [2018-01-21 10:27:33,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:27:33,653 INFO L432 AbstractCegarLoop]: Abstraction has 187 states and 211 transitions. [2018-01-21 10:27:33,653 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-21 10:27:33,654 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 211 transitions. [2018-01-21 10:27:33,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-01-21 10:27:33,658 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:27:33,658 INFO L322 BasicCegarLoop]: trace histogram [14, 14, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:27:33,658 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:27:33,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1635919095, now seen corresponding path program 4 times [2018-01-21 10:27:33,658 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:27:33,659 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:33,660 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 10:27:33,660 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:33,660 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:27:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:33,704 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:27:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2018-01-21 10:27:33,868 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:33,868 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 10:27:33,868 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 10:27:33,868 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 10:27:33,868 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:33,868 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 10:27:33,873 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 10:27:33,874 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 10:27:33,928 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 10:27:33,933 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 10:27:34,036 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 567 proven. 9 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-01-21 10:27:34,037 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 10:27:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 159 proven. 189 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2018-01-21 10:27:34,322 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:34,322 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 13 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 10:27:34,325 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 10:27:34,325 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 10:27:34,438 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 10:27:34,449 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 10:27:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 567 proven. 9 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-01-21 10:27:34,484 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 10:27:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 159 proven. 189 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2018-01-21 10:27:34,725 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 10:27:34,725 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11, 11, 11] total 21 [2018-01-21 10:27:34,725 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 10:27:34,726 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-21 10:27:34,726 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-21 10:27:34,726 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2018-01-21 10:27:34,727 INFO L87 Difference]: Start difference. First operand 187 states and 211 transitions. Second operand 17 states. [2018-01-21 10:27:34,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:27:34,977 INFO L93 Difference]: Finished difference Result 393 states and 464 transitions. [2018-01-21 10:27:34,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-21 10:27:34,978 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 245 [2018-01-21 10:27:34,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:27:34,979 INFO L225 Difference]: With dead ends: 393 [2018-01-21 10:27:34,979 INFO L226 Difference]: Without dead ends: 251 [2018-01-21 10:27:34,980 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 995 GetRequests, 954 SyntacticMatches, 14 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2018-01-21 10:27:34,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-01-21 10:27:34,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 202. [2018-01-21 10:27:34,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-01-21 10:27:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 228 transitions. [2018-01-21 10:27:34,995 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 228 transitions. Word has length 245 [2018-01-21 10:27:34,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:27:34,995 INFO L432 AbstractCegarLoop]: Abstraction has 202 states and 228 transitions. [2018-01-21 10:27:34,996 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-21 10:27:34,996 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 228 transitions. [2018-01-21 10:27:35,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-01-21 10:27:35,012 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:27:35,012 INFO L322 BasicCegarLoop]: trace histogram [21, 17, 15, 15, 15, 15, 11, 11, 11, 11, 11, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:27:35,012 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:27:35,013 INFO L82 PathProgramCache]: Analyzing trace with hash -650410822, now seen corresponding path program 5 times [2018-01-21 10:27:35,013 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:27:35,013 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:35,014 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 10:27:35,014 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:35,014 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:27:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:35,061 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:27:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1437 trivial. 0 not checked. [2018-01-21 10:27:35,325 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:35,325 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 10:27:35,325 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 10:27:35,326 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 10:27:35,326 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:35,326 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 10:27:35,333 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 10:27:35,333 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 10:27:35,357 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 10:27:35,366 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 10:27:35,377 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 10:27:35,391 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 10:27:35,559 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 10:27:35,562 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 10:27:35,568 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 10:27:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 912 proven. 70 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2018-01-21 10:27:35,773 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 10:27:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 168 proven. 256 refuted. 0 times theorem prover too weak. 1130 trivial. 0 not checked. [2018-01-21 10:27:36,082 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:36,083 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 15 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 10:27:36,085 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 10:27:36,086 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 10:27:36,115 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 10:27:36,130 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 10:27:36,172 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 10:27:41,137 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 10:27:53,199 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 10:27:53,286 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 10:27:53,298 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 10:27:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 912 proven. 70 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2018-01-21 10:27:53,369 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 10:27:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 168 proven. 256 refuted. 0 times theorem prover too weak. 1130 trivial. 0 not checked. [2018-01-21 10:27:53,703 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 10:27:53,703 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13, 13, 13] total 26 [2018-01-21 10:27:53,704 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 10:27:53,704 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-21 10:27:53,704 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-21 10:27:53,704 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2018-01-21 10:27:53,705 INFO L87 Difference]: Start difference. First operand 202 states and 228 transitions. Second operand 20 states. [2018-01-21 10:27:54,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:27:54,539 INFO L93 Difference]: Finished difference Result 440 states and 507 transitions. [2018-01-21 10:27:54,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-21 10:27:54,540 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 312 [2018-01-21 10:27:54,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:27:54,541 INFO L225 Difference]: With dead ends: 440 [2018-01-21 10:27:54,541 INFO L226 Difference]: Without dead ends: 229 [2018-01-21 10:27:54,542 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1277 GetRequests, 1220 SyntacticMatches, 15 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=1549, Unknown=0, NotChecked=0, Total=1892 [2018-01-21 10:27:54,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-01-21 10:27:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 190. [2018-01-21 10:27:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-01-21 10:27:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 209 transitions. [2018-01-21 10:27:54,556 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 209 transitions. Word has length 312 [2018-01-21 10:27:54,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:27:54,557 INFO L432 AbstractCegarLoop]: Abstraction has 190 states and 209 transitions. [2018-01-21 10:27:54,557 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-21 10:27:54,557 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 209 transitions. [2018-01-21 10:27:54,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-01-21 10:27:54,560 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:27:54,560 INFO L322 BasicCegarLoop]: trace histogram [25, 22, 18, 18, 18, 18, 15, 15, 15, 15, 15, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:27:54,560 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:27:54,560 INFO L82 PathProgramCache]: Analyzing trace with hash 354326094, now seen corresponding path program 6 times [2018-01-21 10:27:54,561 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:27:54,561 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:54,561 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 10:27:54,562 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:27:54,562 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:27:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:27:54,612 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:27:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2018-01-21 10:27:54,953 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:54,953 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 10:27:54,953 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 10:27:54,953 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 10:27:54,954 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:54,954 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 10:27:54,961 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 10:27:54,961 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-21 10:27:54,998 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 10:27:55,001 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 10:27:55,007 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 10:27:55,017 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 10:27:55,028 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 10:27:55,045 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 10:27:55,068 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 10:27:55,143 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 10:27:55,338 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 10:27:55,344 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 10:27:55,352 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 10:27:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 380 proven. 24 refuted. 0 times theorem prover too weak. 1992 trivial. 0 not checked. [2018-01-21 10:27:55,461 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 10:27:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 380 proven. 24 refuted. 0 times theorem prover too weak. 1992 trivial. 0 not checked. [2018-01-21 10:27:55,757 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:27:55,758 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 17 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 10:27:55,760 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 10:27:55,760 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-21 10:27:55,788 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 10:27:55,794 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 10:27:55,808 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 10:27:55,834 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 10:27:55,888 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 10:27:56,043 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 10:28:08,066 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 10:28:10,334 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command Received shutdown request... [2018-01-21 10:28:22,406 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 10:28:22,564 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 10:28:22,584 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 10:28:22,597 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-01-21 10:28:22,598 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-21 10:28:22,600 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 10:28:22,601 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 10:28:22,601 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 10:28:22,601 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 10:28:22,601 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 10:28:22,601 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 10:28:22,601 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 10:28:22,601 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 10:28:22,601 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 10:28:22,602 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-21 10:28:22,603 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-21 10:28:22,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 10:28:22 BoogieIcfgContainer [2018-01-21 10:28:22,604 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 10:28:22,605 INFO L168 Benchmark]: Toolchain (without parser) took 61412.92 ms. Allocated memory was 308.3 MB in the beginning and 937.4 MB in the end (delta: 629.1 MB). Free memory was 269.2 MB in the beginning and 724.0 MB in the end (delta: -454.8 MB). Peak memory consumption was 174.4 MB. Max. memory is 5.3 GB. [2018-01-21 10:28:22,606 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 308.3 MB. Free memory is still 273.2 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 10:28:22,606 INFO L168 Benchmark]: CACSL2BoogieTranslator took 211.30 ms. Allocated memory is still 308.3 MB. Free memory was 269.2 MB in the beginning and 259.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-21 10:28:22,607 INFO L168 Benchmark]: Boogie Preprocessor took 41.62 ms. Allocated memory is still 308.3 MB. Free memory was 259.2 MB in the beginning and 257.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 10:28:22,607 INFO L168 Benchmark]: RCFGBuilder took 307.08 ms. Allocated memory is still 308.3 MB. Free memory was 257.2 MB in the beginning and 240.3 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 5.3 GB. [2018-01-21 10:28:22,607 INFO L168 Benchmark]: TraceAbstraction took 60846.13 ms. Allocated memory was 308.3 MB in the beginning and 937.4 MB in the end (delta: 629.1 MB). Free memory was 238.3 MB in the beginning and 724.0 MB in the end (delta: -485.7 MB). Peak memory consumption was 143.4 MB. Max. memory is 5.3 GB. [2018-01-21 10:28:22,609 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 308.3 MB. Free memory is still 273.2 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 211.30 ms. Allocated memory is still 308.3 MB. Free memory was 269.2 MB in the beginning and 259.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 41.62 ms. Allocated memory is still 308.3 MB. Free memory was 259.2 MB in the beginning and 257.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 307.08 ms. Allocated memory is still 308.3 MB. Free memory was 257.2 MB in the beginning and 240.3 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 60846.13 ms. Allocated memory was 308.3 MB in the beginning and 937.4 MB in the end (delta: 629.1 MB). Free memory was 238.3 MB in the beginning and 724.0 MB in the end (delta: -485.7 MB). Peak memory consumption was 143.4 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 44 LocStat_MAX_WEQGRAPH_SIZE : 2 LocStat_MAX_SIZEOF_WEQEDGELABEL : 1 LocStat_NO_SUPPORTING_EQUALITIES : 410 LocStat_NO_SUPPORTING_DISEQUALITIES : 98 LocStat_NO_DISJUNCTIONS : -88 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 53 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 66 TransStat_NO_SUPPORTING_DISEQUALITIES : 8 TransStat_NO_DISJUNCTIONS : 53 TransStat_MAX_NO_DISJUNCTIONS : 1 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.483727 RENAME_VARIABLES(MILLISECONDS) : 0.260436 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.436304 PROJECTAWAY(MILLISECONDS) : 0.189240 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.072752 DISJOIN(MILLISECONDS) : 0.245685 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.290370 ADD_EQUALITY(MILLISECONDS) : 0.047796 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.011970 #CONJOIN_DISJUNCTIVE : 98 #RENAME_VARIABLES : 195 #UNFREEZE : 0 #CONJOIN : 159 #PROJECTAWAY : 167 #ADD_WEAK_EQUALITY : 9 #DISJOIN : 18 #RENAME_VARIABLES_DISJUNCTIVE : 195 #ADD_EQUALITY : 67 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 4 - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 47 LocStat_MAX_WEQGRAPH_SIZE : 2 LocStat_MAX_SIZEOF_WEQEDGELABEL : 1 LocStat_NO_SUPPORTING_EQUALITIES : 431 LocStat_NO_SUPPORTING_DISEQUALITIES : 108 LocStat_NO_DISJUNCTIONS : -94 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 57 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 69 TransStat_NO_SUPPORTING_DISEQUALITIES : 8 TransStat_NO_DISJUNCTIONS : 57 TransStat_MAX_NO_DISJUNCTIONS : 1 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.426391 RENAME_VARIABLES(MILLISECONDS) : 0.216973 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.392814 PROJECTAWAY(MILLISECONDS) : 0.135683 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.059416 DISJOIN(MILLISECONDS) : 0.214652 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.242345 ADD_EQUALITY(MILLISECONDS) : 0.034351 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.013919 #CONJOIN_DISJUNCTIVE : 128 #RENAME_VARIABLES : 261 #UNFREEZE : 0 #CONJOIN : 197 #PROJECTAWAY : 209 #ADD_WEAK_EQUALITY : 9 #DISJOIN : 21 #RENAME_VARIABLES_DISJUNCTIVE : 261 #ADD_EQUALITY : 70 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 4 - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 51 LocStat_MAX_WEQGRAPH_SIZE : 3 LocStat_MAX_SIZEOF_WEQEDGELABEL : 1 LocStat_NO_SUPPORTING_EQUALITIES : 483 LocStat_NO_SUPPORTING_DISEQUALITIES : 123 LocStat_NO_DISJUNCTIONS : -102 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 62 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 72 TransStat_NO_SUPPORTING_DISEQUALITIES : 8 TransStat_NO_DISJUNCTIONS : 62 TransStat_MAX_NO_DISJUNCTIONS : 1 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.245867 RENAME_VARIABLES(MILLISECONDS) : 0.143041 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.222186 PROJECTAWAY(MILLISECONDS) : 0.096263 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.063478 DISJOIN(MILLISECONDS) : 0.121311 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.161602 ADD_EQUALITY(MILLISECONDS) : 0.031340 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.009915 #CONJOIN_DISJUNCTIVE : 326 #RENAME_VARIABLES : 753 #UNFREEZE : 0 #CONJOIN : 513 #PROJECTAWAY : 505 #ADD_WEAK_EQUALITY : 11 #DISJOIN : 81 #RENAME_VARIABLES_DISJUNCTIVE : 753 #ADD_EQUALITY : 74 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 4 * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: barErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 error locations. SAFE Result, 0.3s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 66 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=0, 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, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 17 PreInvPairs, 21 NumberOfFragments, 12 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 361 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 error locations. UNSAFE Result, 0.0s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=0, 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, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: fooErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 error locations. SAFE Result, 0.6s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 138 SDtfs, 60 SDslu, 196 SDs, 0 SdLazy, 114 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=2, 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, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 8 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 87 NumberOfCodeBlocks, 87 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 5846 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 1). Cancelled while BasicCegarLoop was analyzing trace of length 377 with TraceHistMax 25, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 error locations. TIMEOUT Result, 59.7s OverallTime, 11 OverallIterations, 25 TraceHistogramMax, 2.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 522 SDtfs, 942 SDslu, 2679 SDs, 0 SdLazy, 1674 SolverSat, 188 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4406 GetRequests, 4180 SyntacticMatches, 53 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=202occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 5.6s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 280 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 18.1s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 3332 NumberOfCodeBlocks, 3018 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 5449 ConstructedInterpolants, 0 QuantifiedInterpolants, 1823391 SizeOfPredicates, 48 NumberOfNonLiveVariables, 4547 ConjunctsInSsa, 115 ConjunctsInUnsatCore, 38 InterpolantComputations, 6 PerfectInterpolantSequences, 13844/15322 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 31). Cancelled while IsEmpty was searching accepting run (input had 62 states). - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 error locations. TIMEOUT Result, 0.0s OverallTime, 0 OverallIterations, 0 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=0, 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, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_10-28-22-622.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf_AutomizerC.xml/Csv-VPDomainBenchmark-0-2018-01-21_10-28-22-622.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf_AutomizerC.xml/Csv-BenchmarkWithCounters-0-2018-01-21_10-28-22-622.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf_AutomizerC.xml/Csv-VPDomainBenchmark-1-2018-01-21_10-28-22-622.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf_AutomizerC.xml/Csv-BenchmarkWithCounters-1-2018-01-21_10-28-22-622.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf_AutomizerC.xml/Csv-VPDomainBenchmark-2-2018-01-21_10-28-22-622.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf_AutomizerC.xml/Csv-BenchmarkWithCounters-2-2018-01-21_10-28-22-622.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_10-28-22-622.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_10-28-22-622.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_10-28-22-622.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_10-28-22-622.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-4-2018-01-21_10-28-22-622.csv Completed graceful shutdown