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.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength2_true-valid-memsafety.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-20 23:51:12,829 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 23:51:12,831 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 23:51:12,846 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 23:51:12,846 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 23:51:12,847 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 23:51:12,848 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 23:51:12,850 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 23:51:12,852 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 23:51:12,853 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 23:51:12,854 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-20 23:51:12,854 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-20 23:51:12,855 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-20 23:51:12,857 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-20 23:51:12,858 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-20 23:51:12,860 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-20 23:51:12,862 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-20 23:51:12,864 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-20 23:51:12,866 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-20 23:51:12,867 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-20 23:51:12,869 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-20 23:51:12,870 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-20 23:51:12,870 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-20 23:51:12,871 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-20 23:51:12,872 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-20 23:51:12,873 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-20 23:51:12,874 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-20 23:51:12,874 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-20 23:51:12,874 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-20 23:51:12,875 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-20 23:51:12,875 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-20 23:51:12,876 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.epf [2018-01-20 23:51:12,884 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 23:51:12,884 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 23:51:12,885 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 23:51:12,885 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 23:51:12,885 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 23:51:12,885 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 23:51:12,885 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 23:51:12,886 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 23:51:12,886 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 23:51:12,886 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 23:51:12,886 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 23:51:12,886 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 23:51:12,887 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 23:51:12,887 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 23:51:12,887 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 23:51:12,887 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 23:51:12,887 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 23:51:12,887 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 23:51:12,887 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 23:51:12,887 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 23:51:12,888 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 23:51:12,888 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 23:51:12,888 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 23:51:12,888 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 23:51:12,888 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 23:51:12,889 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 23:51:12,889 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 23:51:12,889 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 23:51:12,889 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 23:51:12,889 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 23:51:12,889 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 23:51:12,889 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-20 23:51:12,890 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 23:51:12,890 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 23:51:12,890 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 23:51:12,890 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-20 23:51:12,891 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 23:51:12,891 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 23:51:12,924 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 23:51:12,934 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 23:51:12,937 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 23:51:12,939 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 23:51:12,939 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 23:51:12,939 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength2_true-valid-memsafety.c [2018-01-20 23:51:13,057 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 23:51:13,062 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 23:51:13,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 23:51:13,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 23:51:13,068 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 23:51:13,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:51:13" (1/1) ... [2018-01-20 23:51:13,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fa4218e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:51:13, skipping insertion in model container [2018-01-20 23:51:13,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:51:13" (1/1) ... [2018-01-20 23:51:13,085 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:51:13,099 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:51:13,212 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:51:13,230 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:51:13,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:51:13 WrapperNode [2018-01-20 23:51:13,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 23:51:13,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 23:51:13,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 23:51:13,238 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 23:51:13,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:51:13" (1/1) ... [2018-01-20 23:51:13,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:51:13" (1/1) ... [2018-01-20 23:51:13,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:51:13" (1/1) ... [2018-01-20 23:51:13,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:51:13" (1/1) ... [2018-01-20 23:51:13,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:51:13" (1/1) ... [2018-01-20 23:51:13,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:51:13" (1/1) ... [2018-01-20 23:51:13,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:51:13" (1/1) ... [2018-01-20 23:51:13,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 23:51:13,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 23:51:13,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 23:51:13,270 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 23:51:13,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:51:13" (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 [2018-01-20 23:51:13,316 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 23:51:13,316 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 23:51:13,317 INFO L136 BoogieDeclarations]: Found implementation of procedure bar [2018-01-20 23:51:13,317 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-20 23:51:13,317 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 23:51:13,317 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-20 23:51:13,317 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-20 23:51:13,317 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 23:51:13,317 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 23:51:13,317 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 23:51:13,317 INFO L128 BoogieDeclarations]: Found specification of procedure bar [2018-01-20 23:51:13,317 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-20 23:51:13,318 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 23:51:13,318 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 23:51:13,318 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 23:51:13,518 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 23:51:13,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:51:13 BoogieIcfgContainer [2018-01-20 23:51:13,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 23:51:13,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 23:51:13,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 23:51:13,522 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 23:51:13,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 11:51:13" (1/3) ... [2018-01-20 23:51:13,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28265479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:51:13, skipping insertion in model container [2018-01-20 23:51:13,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:51:13" (2/3) ... [2018-01-20 23:51:13,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28265479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:51:13, skipping insertion in model container [2018-01-20 23:51:13,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:51:13" (3/3) ... [2018-01-20 23:51:13,525 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2_true-valid-memsafety.c [2018-01-20 23:51:13,531 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 23:51:13,538 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-01-20 23:51:13,576 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:51:13,576 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:51:13,576 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:51:13,576 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:51:13,577 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:51:13,577 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:51:13,577 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:51:13,577 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == barErr0EnsuresViolation======== [2018-01-20 23:51:13,578 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:51:13,599 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-20 23:51:13,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-20 23:51:13,607 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:51:13,608 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] [2018-01-20 23:51:13,608 INFO L371 AbstractCegarLoop]: === Iteration 1 === [barErr0EnsuresViolation]=== [2018-01-20 23:51:13,613 INFO L82 PathProgramCache]: Analyzing trace with hash -492377012, now seen corresponding path program 1 times [2018-01-20 23:51:13,615 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:51:13,660 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:13,660 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:51:13,660 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:13,660 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:51:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:13,711 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:51:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:51:13,751 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:51:13,751 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:51:13,751 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:51:13,754 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:51:13,765 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:51:13,766 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:51:13,767 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2018-01-20 23:51:13,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:51:13,790 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2018-01-20 23:51:13,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:51:13,791 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2018-01-20 23:51:13,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:51:13,796 INFO L225 Difference]: With dead ends: 114 [2018-01-20 23:51:13,797 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 23:51:13,800 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 [2018-01-20 23:51:13,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 23:51:13,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 23:51:13,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 23:51:13,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 23:51:13,821 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2018-01-20 23:51:13,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:51:13,822 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 23:51:13,822 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:51:13,822 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 23:51:13,822 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 23:51:13,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-01-20 23:51:13,944 INFO L404 ceAbstractionStarter]: At program point L13'''(lines 13 15) the Hoare annotation is: true [2018-01-20 23:51:13,944 INFO L401 ceAbstractionStarter]: For program point barErr0EnsuresViolation(lines 11 17) no Hoare annotation was computed. [2018-01-20 23:51:13,945 INFO L401 ceAbstractionStarter]: For program point L13''(lines 13 15) no Hoare annotation was computed. [2018-01-20 23:51:13,945 INFO L401 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-01-20 23:51:13,945 INFO L401 ceAbstractionStarter]: For program point L13(lines 13 15) no Hoare annotation was computed. [2018-01-20 23:51:13,945 INFO L404 ceAbstractionStarter]: At program point barENTRY(lines 11 17) the Hoare annotation is: true [2018-01-20 23:51:13,945 INFO L401 ceAbstractionStarter]: For program point L13''''(lines 13 15) no Hoare annotation was computed. [2018-01-20 23:51:13,945 INFO L401 ceAbstractionStarter]: For program point barFINAL(lines 11 17) no Hoare annotation was computed. [2018-01-20 23:51:13,946 INFO L401 ceAbstractionStarter]: For program point L14'(line 14) no Hoare annotation was computed. [2018-01-20 23:51:13,946 INFO L401 ceAbstractionStarter]: For program point barEXIT(lines 11 17) no Hoare annotation was computed. [2018-01-20 23:51:13,946 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initErr0EnsuresViolation(lines 1 43) no Hoare annotation was computed. [2018-01-20 23:51:13,946 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 43) no Hoare annotation was computed. [2018-01-20 23:51:13,946 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 43) the Hoare annotation is: true [2018-01-20 23:51:13,946 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 43) no Hoare annotation was computed. [2018-01-20 23:51:13,947 INFO L401 ceAbstractionStarter]: For program point fooEXIT(lines 20 29) no Hoare annotation was computed. [2018-01-20 23:51:13,947 INFO L401 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-01-20 23:51:13,947 INFO L401 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2018-01-20 23:51:13,947 INFO L401 ceAbstractionStarter]: For program point L22(lines 22 24) no Hoare annotation was computed. [2018-01-20 23:51:13,947 INFO L401 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2018-01-20 23:51:13,947 INFO L401 ceAbstractionStarter]: For program point L23'(line 23) no Hoare annotation was computed. [2018-01-20 23:51:13,947 INFO L401 ceAbstractionStarter]: For program point L21'''''(line 21) no Hoare annotation was computed. [2018-01-20 23:51:13,947 INFO L401 ceAbstractionStarter]: For program point L25'(lines 25 27) no Hoare annotation was computed. [2018-01-20 23:51:13,947 INFO L401 ceAbstractionStarter]: For program point L21'''(line 21) no Hoare annotation was computed. [2018-01-20 23:51:13,948 INFO L401 ceAbstractionStarter]: For program point L21'(line 21) no Hoare annotation was computed. [2018-01-20 23:51:13,948 INFO L401 ceAbstractionStarter]: For program point fooFINAL(lines 20 29) no Hoare annotation was computed. [2018-01-20 23:51:13,948 INFO L404 ceAbstractionStarter]: At program point fooENTRY(lines 20 29) the Hoare annotation is: true [2018-01-20 23:51:13,948 INFO L401 ceAbstractionStarter]: For program point L22''(lines 22 24) no Hoare annotation was computed. [2018-01-20 23:51:13,948 INFO L401 ceAbstractionStarter]: For program point L23''(line 23) no Hoare annotation was computed. [2018-01-20 23:51:13,948 INFO L401 ceAbstractionStarter]: For program point L21''(line 21) no Hoare annotation was computed. [2018-01-20 23:51:13,948 INFO L404 ceAbstractionStarter]: At program point L22''''(lines 22 24) the Hoare annotation is: true [2018-01-20 23:51:13,948 INFO L404 ceAbstractionStarter]: At program point L22'''(lines 22 24) the Hoare annotation is: true [2018-01-20 23:51:13,948 INFO L401 ceAbstractionStarter]: For program point fooErr0EnsuresViolation(lines 20 29) no Hoare annotation was computed. [2018-01-20 23:51:13,948 INFO L401 ceAbstractionStarter]: For program point L21''''(line 21) no Hoare annotation was computed. [2018-01-20 23:51:13,949 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 43) the Hoare annotation is: true [2018-01-20 23:51:13,949 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 43) no Hoare annotation was computed. [2018-01-20 23:51:13,949 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 43) the Hoare annotation is: true [2018-01-20 23:51:13,949 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startErr0EnsuresViolation(lines 1 43) no Hoare annotation was computed. [2018-01-20 23:51:13,949 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 43) no Hoare annotation was computed. [2018-01-20 23:51:13,949 INFO L404 ceAbstractionStarter]: At program point L36''(lines 36 40) the Hoare annotation is: true [2018-01-20 23:51:13,949 INFO L401 ceAbstractionStarter]: For program point L33''(lines 33 35) no Hoare annotation was computed. [2018-01-20 23:51:13,949 INFO L401 ceAbstractionStarter]: For program point L34''(line 34) no Hoare annotation was computed. [2018-01-20 23:51:13,950 INFO L404 ceAbstractionStarter]: At program point L33'''(lines 33 35) the Hoare annotation is: true [2018-01-20 23:51:13,950 INFO L401 ceAbstractionStarter]: For program point L32''(line 32) no Hoare annotation was computed. [2018-01-20 23:51:13,950 INFO L401 ceAbstractionStarter]: For program point L37'(line 37) no Hoare annotation was computed. [2018-01-20 23:51:13,950 INFO L401 ceAbstractionStarter]: For program point L32''''(line 32) no Hoare annotation was computed. [2018-01-20 23:51:13,950 INFO L401 ceAbstractionStarter]: For program point L32'''''(line 32) no Hoare annotation was computed. [2018-01-20 23:51:13,950 INFO L401 ceAbstractionStarter]: For program point mainErr0EnsuresViolation(lines 31 42) no Hoare annotation was computed. [2018-01-20 23:51:13,950 INFO L401 ceAbstractionStarter]: For program point L36'''(lines 36 40) no Hoare annotation was computed. [2018-01-20 23:51:13,951 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 31 42) no Hoare annotation was computed. [2018-01-20 23:51:13,951 INFO L401 ceAbstractionStarter]: For program point L32(line 32) no Hoare annotation was computed. [2018-01-20 23:51:13,951 INFO L401 ceAbstractionStarter]: For program point L32'''(line 32) no Hoare annotation was computed. [2018-01-20 23:51:13,951 INFO L404 ceAbstractionStarter]: At program point L34(line 34) the Hoare annotation is: true [2018-01-20 23:51:13,951 INFO L401 ceAbstractionStarter]: For program point L33(lines 33 35) no Hoare annotation was computed. [2018-01-20 23:51:13,951 INFO L401 ceAbstractionStarter]: For program point L34'''(line 34) no Hoare annotation was computed. [2018-01-20 23:51:13,951 INFO L401 ceAbstractionStarter]: For program point L33''''(lines 33 35) no Hoare annotation was computed. [2018-01-20 23:51:13,951 INFO L401 ceAbstractionStarter]: For program point L36(lines 36 40) no Hoare annotation was computed. [2018-01-20 23:51:13,952 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 31 42) no Hoare annotation was computed. [2018-01-20 23:51:13,952 INFO L404 ceAbstractionStarter]: At program point mainENTRY(lines 31 42) the Hoare annotation is: true [2018-01-20 23:51:13,952 INFO L401 ceAbstractionStarter]: For program point L38(line 38) no Hoare annotation was computed. [2018-01-20 23:51:13,952 INFO L401 ceAbstractionStarter]: For program point L37(line 37) no Hoare annotation was computed. [2018-01-20 23:51:13,952 INFO L401 ceAbstractionStarter]: For program point L34'(line 34) no Hoare annotation was computed. [2018-01-20 23:51:13,952 INFO L401 ceAbstractionStarter]: For program point L32'(line 32) no Hoare annotation was computed. [2018-01-20 23:51:13,956 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:51:13,956 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:51:13,956 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:51:13,956 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:51:13,956 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:51:13,957 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:51:13,957 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:51:13,957 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-20 23:51:13,957 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:51:13,959 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-20 23:51:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-20 23:51:13,960 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:51:13,960 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-20 23:51:13,960 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-20 23:51:13,961 INFO L82 PathProgramCache]: Analyzing trace with hash 136143, now seen corresponding path program 1 times [2018-01-20 23:51:13,961 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:51:13,962 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:13,962 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:51:13,962 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:13,962 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:51:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:51:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:51:13,990 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 23:51:13,994 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:51:13,998 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:51:13,998 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:51:13,999 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:51:13,999 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:51:13,999 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:51:13,999 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:51:13,999 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:51:13,999 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-20 23:51:13,999 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:51:14,001 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-20 23:51:14,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-20 23:51:14,004 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:51:14,004 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] [2018-01-20 23:51:14,004 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-20 23:51:14,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1220349549, now seen corresponding path program 1 times [2018-01-20 23:51:14,004 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:51:14,005 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:14,005 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:51:14,005 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:14,005 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:51:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:14,021 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:51:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:51:14,044 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:51:14,045 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:51:14,045 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:51:14,045 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:51:14,045 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:51:14,046 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:51:14,046 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2018-01-20 23:51:14,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:51:14,055 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2018-01-20 23:51:14,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:51:14,055 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2018-01-20 23:51:14,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:51:14,058 INFO L225 Difference]: With dead ends: 114 [2018-01-20 23:51:14,058 INFO L226 Difference]: Without dead ends: 43 [2018-01-20 23:51:14,059 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 [2018-01-20 23:51:14,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-20 23:51:14,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-20 23:51:14,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-20 23:51:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2018-01-20 23:51:14,070 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2018-01-20 23:51:14,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:51:14,071 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2018-01-20 23:51:14,071 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:51:14,071 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2018-01-20 23:51:14,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-20 23:51:14,072 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:51:14,073 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] [2018-01-20 23:51:14,073 INFO L371 AbstractCegarLoop]: === Iteration 2 === [fooErr0EnsuresViolation]=== [2018-01-20 23:51:14,073 INFO L82 PathProgramCache]: Analyzing trace with hash 390316661, now seen corresponding path program 1 times [2018-01-20 23:51:14,073 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:51:14,074 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:14,075 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:51:14,075 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:14,075 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:51:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:14,107 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:51:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:51:14,215 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:51:14,215 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-20 23:51:14,215 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:51:14,217 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-20 23:51:14,217 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-20 23:51:14,217 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-20 23:51:14,218 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 4 states. [2018-01-20 23:51:14,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:51:14,333 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2018-01-20 23:51:14,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-20 23:51:14,338 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2018-01-20 23:51:14,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:51:14,338 INFO L225 Difference]: With dead ends: 43 [2018-01-20 23:51:14,338 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 23:51:14,339 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 [2018-01-20 23:51:14,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 23:51:14,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 23:51:14,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 23:51:14,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 23:51:14,340 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2018-01-20 23:51:14,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:51:14,340 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 23:51:14,340 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-20 23:51:14,340 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 23:51:14,340 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 23:51:14,342 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:51:14,342 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:51:14,342 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:51:14,342 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:51:14,342 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:51:14,342 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:51:14,342 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:51:14,342 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-20 23:51:14,343 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:51:14,344 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-20 23:51:14,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-20 23:51:14,345 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:51:14,345 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:51:14,345 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:51:14,345 INFO L82 PathProgramCache]: Analyzing trace with hash -851979775, now seen corresponding path program 1 times [2018-01-20 23:51:14,345 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:51:14,346 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:14,346 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:51:14,346 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:14,346 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:51:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:14,351 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:51:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:51:14,359 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:51:14,359 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:51:14,359 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:51:14,359 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:51:14,359 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:51:14,360 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:51:14,360 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2018-01-20 23:51:14,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:51:14,365 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2018-01-20 23:51:14,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:51:14,365 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-20 23:51:14,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:51:14,366 INFO L225 Difference]: With dead ends: 114 [2018-01-20 23:51:14,366 INFO L226 Difference]: Without dead ends: 57 [2018-01-20 23:51:14,367 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 [2018-01-20 23:51:14,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-20 23:51:14,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-01-20 23:51:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-20 23:51:14,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2018-01-20 23:51:14,372 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 17 [2018-01-20 23:51:14,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:51:14,372 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2018-01-20 23:51:14,372 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:51:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2018-01-20 23:51:14,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-20 23:51:14,373 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:51:14,373 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:51:14,373 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:51:14,373 INFO L82 PathProgramCache]: Analyzing trace with hash -178858898, now seen corresponding path program 1 times [2018-01-20 23:51:14,373 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:51:14,374 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:14,374 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:51:14,374 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:14,375 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:51:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:14,380 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:51:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:51:14,402 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:51:14,402 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-20 23:51:14,402 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:51:14,402 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-20 23:51:14,402 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-20 23:51:14,402 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-20 23:51:14,403 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 3 states. [2018-01-20 23:51:14,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:51:14,422 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2018-01-20 23:51:14,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-20 23:51:14,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-20 23:51:14,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:51:14,425 INFO L225 Difference]: With dead ends: 76 [2018-01-20 23:51:14,425 INFO L226 Difference]: Without dead ends: 61 [2018-01-20 23:51:14,425 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 [2018-01-20 23:51:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-20 23:51:14,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2018-01-20 23:51:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-20 23:51:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2018-01-20 23:51:14,437 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 19 [2018-01-20 23:51:14,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:51:14,437 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2018-01-20 23:51:14,438 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-20 23:51:14,438 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2018-01-20 23:51:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-20 23:51:14,439 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:51:14,439 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] [2018-01-20 23:51:14,439 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:51:14,440 INFO L82 PathProgramCache]: Analyzing trace with hash -853032378, now seen corresponding path program 1 times [2018-01-20 23:51:14,440 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:51:14,441 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:14,441 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:51:14,441 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:14,441 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:51:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:14,459 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:51:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:51:14,501 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:14,501 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:51:14,502 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 47 with the following transitions: [2018-01-20 23:51:14,503 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] [2018-01-20 23:51:14,547 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-20 23:51:14,547 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-20 23:51:15,381 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-20 23:51:15,382 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. [2018-01-20 23:51:15,407 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-20 23:51:15,407 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:15,407 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 [2018-01-20 23:51:15,415 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:51:15,416 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-20 23:51:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:15,453 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:51:15,476 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:51:15,617 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:15,618 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 3 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 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:51:15,623 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:51:15,624 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-20 23:51:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:15,684 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:51:15,692 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:51:15,726 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:51:15,726 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 7 [2018-01-20 23:51:15,726 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:51:15,727 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-20 23:51:15,727 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-20 23:51:15,727 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-20 23:51:15,727 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 5 states. [2018-01-20 23:51:15,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:51:15,773 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2018-01-20 23:51:15,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-20 23:51:15,774 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2018-01-20 23:51:15,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:51:15,776 INFO L225 Difference]: With dead ends: 80 [2018-01-20 23:51:15,776 INFO L226 Difference]: Without dead ends: 68 [2018-01-20 23:51:15,777 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-20 23:51:15,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-01-20 23:51:15,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2018-01-20 23:51:15,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-01-20 23:51:15,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2018-01-20 23:51:15,784 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 46 [2018-01-20 23:51:15,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:51:15,785 INFO L432 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2018-01-20 23:51:15,785 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-20 23:51:15,785 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2018-01-20 23:51:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-01-20 23:51:15,789 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:51:15,789 INFO L322 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:51:15,789 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:51:15,789 INFO L82 PathProgramCache]: Analyzing trace with hash -723838693, now seen corresponding path program 2 times [2018-01-20 23:51:15,790 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:51:15,791 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:15,791 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:51:15,791 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:15,791 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:51:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:15,815 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:51:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-01-20 23:51:15,894 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:15,894 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:51:15,894 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:51:15,894 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:51:15,894 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:15,894 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:51:15,906 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 23:51:15,907 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-20 23:51:15,926 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:51:15,946 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:51:15,950 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:51:15,955 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-01-20 23:51:16,029 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-01-20 23:51:16,326 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-01-20 23:51:16,326 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5] total 12 [2018-01-20 23:51:16,326 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:51:16,327 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-20 23:51:16,327 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-20 23:51:16,327 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-01-20 23:51:16,327 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 7 states. [2018-01-20 23:51:16,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:51:16,452 INFO L93 Difference]: Finished difference Result 124 states and 137 transitions. [2018-01-20 23:51:16,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-20 23:51:16,452 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2018-01-20 23:51:16,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:51:16,455 INFO L225 Difference]: With dead ends: 124 [2018-01-20 23:51:16,456 INFO L226 Difference]: Without dead ends: 78 [2018-01-20 23:51:16,458 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-01-20 23:51:16,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-01-20 23:51:16,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2018-01-20 23:51:16,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-01-20 23:51:16,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2018-01-20 23:51:16,464 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 71 [2018-01-20 23:51:16,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:51:16,465 INFO L432 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2018-01-20 23:51:16,465 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-20 23:51:16,465 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2018-01-20 23:51:16,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-01-20 23:51:16,466 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:51:16,466 INFO L322 BasicCegarLoop]: trace histogram [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, 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] [2018-01-20 23:51:16,466 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:51:16,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1699645763, now seen corresponding path program 1 times [2018-01-20 23:51:16,467 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:51:16,467 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:16,467 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:51:16,468 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:16,468 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:51:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:16,494 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:51:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-01-20 23:51:16,582 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:16,582 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:51:16,582 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 78 with the following transitions: [2018-01-20 23:51:16,583 INFO L201 CegarAbsIntRunner]: [0], [4], [7], [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] [2018-01-20 23:51:16,585 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-20 23:51:16,585 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-20 23:51:19,699 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-20 23:51:19,700 INFO L268 AbstractInterpreter]: Visited 50 different actions 161 times. Merged at 30 different actions 59 times. Never widened. Found 8 fixpoints after 4 different actions. Largest state had 25 variables. [2018-01-20 23:51:19,705 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-20 23:51:19,705 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:19,705 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 [2018-01-20 23:51:19,729 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:51:19,729 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-20 23:51:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:19,777 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-20 23:51:19,937 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-20 23:51:20,234 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-01-20 23:51:20,235 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5] total 13 [2018-01-20 23:51:20,235 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:51:20,235 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-20 23:51:20,235 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-20 23:51:20,236 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-01-20 23:51:20,236 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand 8 states. [2018-01-20 23:51:20,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:51:20,397 INFO L93 Difference]: Finished difference Result 155 states and 174 transitions. [2018-01-20 23:51:20,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-20 23:51:20,398 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2018-01-20 23:51:20,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:51:20,399 INFO L225 Difference]: With dead ends: 155 [2018-01-20 23:51:20,399 INFO L226 Difference]: Without dead ends: 98 [2018-01-20 23:51:20,400 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 142 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-01-20 23:51:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-01-20 23:51:20,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 79. [2018-01-20 23:51:20,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-01-20 23:51:20,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2018-01-20 23:51:20,408 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 77 [2018-01-20 23:51:20,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:51:20,409 INFO L432 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2018-01-20 23:51:20,409 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-20 23:51:20,409 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2018-01-20 23:51:20,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-01-20 23:51:20,411 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:51:20,411 INFO L322 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1] [2018-01-20 23:51:20,411 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:51:20,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1275911246, now seen corresponding path program 1 times [2018-01-20 23:51:20,412 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:51:20,413 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:20,413 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:51:20,413 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:20,413 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:51:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:20,435 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:51:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-01-20 23:51:20,509 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:20,509 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:51:20,509 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 83 with the following transitions: [2018-01-20 23:51:20,509 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] [2018-01-20 23:51:20,512 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-20 23:51:20,512 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-20 23:51:22,548 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-20 23:51:22,548 INFO L268 AbstractInterpreter]: Visited 54 different actions 223 times. Merged at 38 different actions 103 times. Never widened. Found 17 fixpoints after 7 different actions. Largest state had 25 variables. [2018-01-20 23:51:22,553 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-20 23:51:22,553 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:22,554 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 [2018-01-20 23:51:22,560 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:51:22,561 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-20 23:51:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:22,588 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-01-20 23:51:22,604 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-01-20 23:51:22,692 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:22,692 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 [2018-01-20 23:51:22,700 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:51:22,700 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-20 23:51:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:22,751 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-01-20 23:51:22,758 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-01-20 23:51:22,805 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:51:22,806 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 9 [2018-01-20 23:51:22,806 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:51:22,806 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-20 23:51:22,806 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-20 23:51:22,806 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-01-20 23:51:22,806 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 6 states. [2018-01-20 23:51:22,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:51:22,845 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2018-01-20 23:51:22,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-20 23:51:22,845 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2018-01-20 23:51:22,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:51:22,847 INFO L225 Difference]: With dead ends: 103 [2018-01-20 23:51:22,847 INFO L226 Difference]: Without dead ends: 91 [2018-01-20 23:51:22,847 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-01-20 23:51:22,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-01-20 23:51:22,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2018-01-20 23:51:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-20 23:51:22,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2018-01-20 23:51:22,856 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 82 [2018-01-20 23:51:22,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:51:22,856 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2018-01-20 23:51:22,856 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-20 23:51:22,856 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2018-01-20 23:51:22,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-01-20 23:51:22,859 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:51:22,860 INFO L322 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:51:22,860 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:51:22,860 INFO L82 PathProgramCache]: Analyzing trace with hash 858734366, now seen corresponding path program 2 times [2018-01-20 23:51:22,860 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:51:22,861 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:22,861 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:51:22,861 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:22,862 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:51:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:22,891 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:51:22,976 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-01-20 23:51:22,977 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:22,979 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:51:22,979 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:51:22,979 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:51:22,980 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:22,980 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 [2018-01-20 23:51:22,988 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 23:51:22,989 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-20 23:51:23,007 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:51:23,031 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:51:23,036 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:51:23,041 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-20 23:51:23,112 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-20 23:51:23,299 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:23,299 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 [2018-01-20 23:51:23,308 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 23:51:23,309 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-20 23:51:23,324 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:51:23,358 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:51:23,381 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:51:23,387 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-01-20 23:51:23,404 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-01-20 23:51:23,486 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:51:23,486 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9, 6, 6] total 21 [2018-01-20 23:51:23,486 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:51:23,487 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-20 23:51:23,487 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-20 23:51:23,487 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2018-01-20 23:51:23,487 INFO L87 Difference]: Start difference. First operand 86 states and 97 transitions. Second operand 13 states. [2018-01-20 23:51:23,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:51:23,653 INFO L93 Difference]: Finished difference Result 233 states and 270 transitions. [2018-01-20 23:51:23,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-20 23:51:23,653 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 118 [2018-01-20 23:51:23,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:51:23,655 INFO L225 Difference]: With dead ends: 233 [2018-01-20 23:51:23,655 INFO L226 Difference]: Without dead ends: 163 [2018-01-20 23:51:23,655 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 455 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2018-01-20 23:51:23,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-01-20 23:51:23,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 119. [2018-01-20 23:51:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-01-20 23:51:23,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 135 transitions. [2018-01-20 23:51:23,666 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 135 transitions. Word has length 118 [2018-01-20 23:51:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:51:23,666 INFO L432 AbstractCegarLoop]: Abstraction has 119 states and 135 transitions. [2018-01-20 23:51:23,666 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-20 23:51:23,666 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 135 transitions. [2018-01-20 23:51:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-01-20 23:51:23,668 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:51:23,668 INFO L322 BasicCegarLoop]: trace histogram [9, 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, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:51:23,668 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:51:23,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1795019066, now seen corresponding path program 3 times [2018-01-20 23:51:23,668 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:51:23,669 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:23,669 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:51:23,669 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:23,669 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:51:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:23,703 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:51:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-01-20 23:51:23,827 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:23,827 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:51:23,827 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:51:23,827 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:51:23,827 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:23,827 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 [2018-01-20 23:51:23,837 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 23:51:23,837 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-20 23:51:23,854 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:51:23,863 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:51:23,874 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:51:23,877 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:51:23,882 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-01-20 23:51:23,941 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-01-20 23:51:24,304 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:24,304 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 [2018-01-20 23:51:24,308 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 23:51:24,309 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-20 23:51:24,331 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:51:24,345 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:51:24,371 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:51:24,386 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:51:24,392 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-01-20 23:51:24,408 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-01-20 23:51:24,636 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:51:24,637 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9, 9, 9] total 18 [2018-01-20 23:51:24,637 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:51:24,637 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-20 23:51:24,637 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-20 23:51:24,638 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2018-01-20 23:51:24,638 INFO L87 Difference]: Start difference. First operand 119 states and 135 transitions. Second operand 12 states. [2018-01-20 23:51:24,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:51:24,814 INFO L93 Difference]: Finished difference Result 199 states and 235 transitions. [2018-01-20 23:51:24,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-20 23:51:24,814 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 166 [2018-01-20 23:51:24,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:51:24,816 INFO L225 Difference]: With dead ends: 199 [2018-01-20 23:51:24,816 INFO L226 Difference]: Without dead ends: 169 [2018-01-20 23:51:24,816 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 648 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2018-01-20 23:51:24,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-01-20 23:51:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 142. [2018-01-20 23:51:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-01-20 23:51:24,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 163 transitions. [2018-01-20 23:51:24,828 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 163 transitions. Word has length 166 [2018-01-20 23:51:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:51:24,828 INFO L432 AbstractCegarLoop]: Abstraction has 142 states and 163 transitions. [2018-01-20 23:51:24,828 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-20 23:51:24,828 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 163 transitions. [2018-01-20 23:51:24,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-01-20 23:51:24,831 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:51:24,831 INFO L322 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2018-01-20 23:51:24,831 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:51:24,831 INFO L82 PathProgramCache]: Analyzing trace with hash -234037377, now seen corresponding path program 4 times [2018-01-20 23:51:24,832 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:51:24,832 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:24,833 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:51:24,833 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:24,833 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:51:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:24,874 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:51:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-01-20 23:51:25,082 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:25,082 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:51:25,082 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:51:25,083 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:51:25,083 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:25,083 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 [2018-01-20 23:51:25,089 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 23:51:25,089 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-20 23:51:25,140 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:51:25,145 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 395 proven. 10 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2018-01-20 23:51:25,243 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 161 proven. 53 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2018-01-20 23:51:25,443 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:25,444 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 [2018-01-20 23:51:25,446 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 23:51:25,447 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-20 23:51:25,583 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:51:25,592 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 395 proven. 10 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2018-01-20 23:51:25,619 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 161 proven. 53 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2018-01-20 23:51:25,782 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:51:25,782 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11, 11, 11] total 21 [2018-01-20 23:51:25,782 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:51:25,783 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-20 23:51:25,783 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-20 23:51:25,783 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2018-01-20 23:51:25,783 INFO L87 Difference]: Start difference. First operand 142 states and 163 transitions. Second operand 17 states. [2018-01-20 23:51:26,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:51:26,038 INFO L93 Difference]: Finished difference Result 451 states and 547 transitions. [2018-01-20 23:51:26,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-20 23:51:26,039 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 223 [2018-01-20 23:51:26,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:51:26,042 INFO L225 Difference]: With dead ends: 451 [2018-01-20 23:51:26,042 INFO L226 Difference]: Without dead ends: 356 [2018-01-20 23:51:26,042 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 911 GetRequests, 871 SyntacticMatches, 12 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2018-01-20 23:51:26,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2018-01-20 23:51:26,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 181. [2018-01-20 23:51:26,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-01-20 23:51:26,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 207 transitions. [2018-01-20 23:51:26,061 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 207 transitions. Word has length 223 [2018-01-20 23:51:26,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:51:26,062 INFO L432 AbstractCegarLoop]: Abstraction has 181 states and 207 transitions. [2018-01-20 23:51:26,062 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-20 23:51:26,062 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 207 transitions. [2018-01-20 23:51:26,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-01-20 23:51:26,064 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:51:26,065 INFO L322 BasicCegarLoop]: trace histogram [18, 14, 12, 12, 12, 12, 12, 8, 8, 8, 8, 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] [2018-01-20 23:51:26,065 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:51:26,065 INFO L82 PathProgramCache]: Analyzing trace with hash 634716707, now seen corresponding path program 5 times [2018-01-20 23:51:26,065 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:51:26,066 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:26,066 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:51:26,066 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:26,066 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:51:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:26,099 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:51:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1046 trivial. 0 not checked. [2018-01-20 23:51:26,285 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:26,285 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:51:26,285 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:51:26,285 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:51:26,285 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:26,285 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 [2018-01-20 23:51:26,290 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 23:51:26,290 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-20 23:51:26,313 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:51:26,322 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:51:26,337 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:51:26,339 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:51:26,346 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 628 proven. 33 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2018-01-20 23:51:26,529 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 126 proven. 376 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2018-01-20 23:51:26,855 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:26,855 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 [2018-01-20 23:51:26,861 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 23:51:26,861 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-20 23:51:26,897 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:51:26,929 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:51:38,949 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:51:39,021 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:51:39,030 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 628 proven. 33 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2018-01-20 23:51:39,068 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 126 proven. 376 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2018-01-20 23:51:39,338 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:51:39,338 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12, 12, 12] total 24 [2018-01-20 23:51:39,338 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:51:39,338 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-20 23:51:39,339 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-20 23:51:39,339 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2018-01-20 23:51:39,339 INFO L87 Difference]: Start difference. First operand 181 states and 207 transitions. Second operand 19 states. [2018-01-20 23:51:39,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:51:39,844 INFO L93 Difference]: Finished difference Result 407 states and 470 transitions. [2018-01-20 23:51:39,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-20 23:51:39,844 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 283 [2018-01-20 23:51:39,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:51:39,847 INFO L225 Difference]: With dead ends: 407 [2018-01-20 23:51:39,847 INFO L226 Difference]: Without dead ends: 212 [2018-01-20 23:51:39,848 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1157 GetRequests, 1104 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2018-01-20 23:51:39,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-01-20 23:51:39,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 193. [2018-01-20 23:51:39,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-01-20 23:51:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 213 transitions. [2018-01-20 23:51:39,864 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 213 transitions. Word has length 283 [2018-01-20 23:51:39,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:51:39,864 INFO L432 AbstractCegarLoop]: Abstraction has 193 states and 213 transitions. [2018-01-20 23:51:39,864 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-20 23:51:39,864 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 213 transitions. [2018-01-20 23:51:39,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2018-01-20 23:51:39,866 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:51:39,867 INFO L322 BasicCegarLoop]: trace histogram [22, 18, 15, 15, 15, 15, 15, 11, 11, 11, 11, 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] [2018-01-20 23:51:39,867 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:51:39,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1619197343, now seen corresponding path program 6 times [2018-01-20 23:51:39,867 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:51:39,867 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:39,868 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:51:39,868 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:39,868 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:51:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:39,914 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:51:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1808 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 1647 trivial. 0 not checked. [2018-01-20 23:51:40,221 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:40,221 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:51:40,221 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:51:40,221 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:51:40,221 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:40,221 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 [2018-01-20 23:51:40,229 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 23:51:40,229 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-20 23:51:40,265 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:51:40,273 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:51:40,282 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:51:40,289 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:51:40,304 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:51:40,336 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:51:40,473 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:51:40,476 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:51:40,481 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1808 backedges. 542 proven. 9 refuted. 0 times theorem prover too weak. 1257 trivial. 0 not checked. [2018-01-20 23:51:40,629 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1808 backedges. 542 proven. 9 refuted. 0 times theorem prover too weak. 1257 trivial. 0 not checked. [2018-01-20 23:51:41,028 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:41,028 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 [2018-01-20 23:51:41,034 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 23:51:41,034 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-20 23:51:41,070 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:51:41,084 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:51:41,111 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:51:41,162 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:51:41,252 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:51:41,524 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:51:53,552 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:51:53,638 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:51:53,659 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1808 backedges. 542 proven. 9 refuted. 0 times theorem prover too weak. 1257 trivial. 0 not checked. [2018-01-20 23:51:53,713 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1808 backedges. 542 proven. 9 refuted. 0 times theorem prover too weak. 1257 trivial. 0 not checked. [2018-01-20 23:51:53,987 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:51:53,987 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10] total 23 [2018-01-20 23:51:53,987 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:51:53,987 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-20 23:51:53,987 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-20 23:51:53,988 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2018-01-20 23:51:53,988 INFO L87 Difference]: Start difference. First operand 193 states and 213 transitions. Second operand 16 states. [2018-01-20 23:51:54,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:51:54,278 INFO L93 Difference]: Finished difference Result 330 states and 383 transitions. [2018-01-20 23:51:54,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-20 23:51:54,278 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 341 [2018-01-20 23:51:54,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:51:54,281 INFO L225 Difference]: With dead ends: 330 [2018-01-20 23:51:54,281 INFO L226 Difference]: Without dead ends: 309 [2018-01-20 23:51:54,282 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1377 GetRequests, 1346 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2018-01-20 23:51:54,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-01-20 23:51:54,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 216. [2018-01-20 23:51:54,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-01-20 23:51:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 243 transitions. [2018-01-20 23:51:54,301 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 243 transitions. Word has length 341 [2018-01-20 23:51:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:51:54,302 INFO L432 AbstractCegarLoop]: Abstraction has 216 states and 243 transitions. [2018-01-20 23:51:54,302 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-20 23:51:54,302 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 243 transitions. [2018-01-20 23:51:54,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2018-01-20 23:51:54,305 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:51:54,306 INFO L322 BasicCegarLoop]: trace histogram [26, 26, 18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:51:54,306 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:51:54,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1930656331, now seen corresponding path program 7 times [2018-01-20 23:51:54,306 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:51:54,307 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:54,307 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:51:54,307 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:54,307 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:51:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:54,359 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:51:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2763 trivial. 0 not checked. [2018-01-20 23:51:54,674 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:54,674 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:51:54,675 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:51:54,675 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:51:54,675 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:54,675 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:51:54,680 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:51:54,680 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-20 23:51:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:54,815 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 1810 proven. 24 refuted. 0 times theorem prover too weak. 1141 trivial. 0 not checked. [2018-01-20 23:51:55,135 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 361 proven. 255 refuted. 0 times theorem prover too weak. 2359 trivial. 0 not checked. [2018-01-20 23:51:55,435 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:55,436 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 19 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 19 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:51:55,439 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:51:55,439 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-20 23:51:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:55,631 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 1810 proven. 24 refuted. 0 times theorem prover too weak. 1141 trivial. 0 not checked. [2018-01-20 23:51:55,706 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 361 proven. 255 refuted. 0 times theorem prover too weak. 2359 trivial. 0 not checked. [2018-01-20 23:51:55,995 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:51:55,996 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13, 13, 13] total 27 [2018-01-20 23:51:55,996 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:51:55,996 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-20 23:51:55,996 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-20 23:51:55,997 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2018-01-20 23:51:55,997 INFO L87 Difference]: Start difference. First operand 216 states and 243 transitions. Second operand 22 states. [2018-01-20 23:51:56,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:51:56,682 INFO L93 Difference]: Finished difference Result 669 states and 825 transitions. [2018-01-20 23:51:56,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-20 23:51:56,682 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 419 [2018-01-20 23:51:56,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:51:56,686 INFO L225 Difference]: With dead ends: 669 [2018-01-20 23:51:56,686 INFO L226 Difference]: Without dead ends: 546 [2018-01-20 23:51:56,687 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1703 GetRequests, 1651 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2018-01-20 23:51:56,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2018-01-20 23:51:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 261. [2018-01-20 23:51:56,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-01-20 23:51:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 293 transitions. [2018-01-20 23:51:56,709 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 293 transitions. Word has length 419 [2018-01-20 23:51:56,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:51:56,709 INFO L432 AbstractCegarLoop]: Abstraction has 261 states and 293 transitions. [2018-01-20 23:51:56,709 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-20 23:51:56,709 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 293 transitions. [2018-01-20 23:51:56,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2018-01-20 23:51:56,712 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:51:56,712 INFO L322 BasicCegarLoop]: trace histogram [35, 29, 26, 26, 26, 26, 26, 20, 20, 20, 20, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:51:56,712 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:51:56,713 INFO L82 PathProgramCache]: Analyzing trace with hash -789917730, now seen corresponding path program 8 times [2018-01-20 23:51:56,713 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:51:56,713 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:56,713 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:51:56,714 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:56,714 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:51:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:56,756 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:51:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4646 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 4376 trivial. 0 not checked. [2018-01-20 23:51:57,360 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:57,361 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:51:57,361 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:51:57,361 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:51:57,361 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:57,361 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:51:57,367 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 23:51:57,367 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-20 23:51:57,400 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:51:57,481 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:51:57,494 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:51:57,501 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4646 backedges. 2189 proven. 9 refuted. 0 times theorem prover too weak. 2448 trivial. 0 not checked. [2018-01-20 23:51:57,851 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4646 backedges. 344 proven. 719 refuted. 0 times theorem prover too weak. 3583 trivial. 0 not checked. [2018-01-20 23:51:58,383 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:51:58,384 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 21 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 21 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:51:58,387 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 23:51:58,387 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-20 23:51:58,431 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:51:58,552 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:51:58,642 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:51:58,667 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:51:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4646 backedges. 2189 proven. 9 refuted. 0 times theorem prover too weak. 2448 trivial. 0 not checked. [2018-01-20 23:51:58,758 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:51:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4646 backedges. 344 proven. 719 refuted. 0 times theorem prover too weak. 3583 trivial. 0 not checked. [2018-01-20 23:51:59,126 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:51:59,127 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12] total 26 [2018-01-20 23:51:59,127 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:51:59,128 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-20 23:51:59,128 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-20 23:51:59,128 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2018-01-20 23:51:59,129 INFO L87 Difference]: Start difference. First operand 261 states and 293 transitions. Second operand 22 states. [2018-01-20 23:51:59,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:51:59,627 INFO L93 Difference]: Finished difference Result 441 states and 500 transitions. [2018-01-20 23:51:59,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-20 23:51:59,627 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 502 [2018-01-20 23:51:59,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:51:59,629 INFO L225 Difference]: With dead ends: 441 [2018-01-20 23:51:59,630 INFO L226 Difference]: Without dead ends: 287 [2018-01-20 23:51:59,631 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2032 GetRequests, 1979 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=267, Invalid=1215, Unknown=0, NotChecked=0, Total=1482 [2018-01-20 23:51:59,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-01-20 23:51:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 260. [2018-01-20 23:51:59,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-01-20 23:51:59,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 286 transitions. [2018-01-20 23:51:59,651 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 286 transitions. Word has length 502 [2018-01-20 23:51:59,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:51:59,652 INFO L432 AbstractCegarLoop]: Abstraction has 260 states and 286 transitions. [2018-01-20 23:51:59,652 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-20 23:51:59,652 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 286 transitions. [2018-01-20 23:51:59,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2018-01-20 23:51:59,656 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:51:59,657 INFO L322 BasicCegarLoop]: trace histogram [40, 34, 30, 30, 30, 30, 30, 24, 24, 24, 24, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:51:59,657 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:51:59,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1877890605, now seen corresponding path program 9 times [2018-01-20 23:51:59,657 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:51:59,658 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:59,658 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:51:59,658 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:51:59,659 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:51:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:51:59,721 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:52:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6215 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 5880 trivial. 0 not checked. [2018-01-20 23:52:00,378 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:52:00,378 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:52:00,378 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:52:00,379 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:52:00,379 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:52:00,379 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:52:00,384 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 23:52:00,384 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-20 23:52:00,413 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:52:00,418 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:52:00,424 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:52:00,434 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:52:00,454 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:52:00,456 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:52:00,462 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:52:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6215 backedges. 1359 proven. 21 refuted. 0 times theorem prover too weak. 4835 trivial. 0 not checked. [2018-01-20 23:52:00,631 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:52:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6215 backedges. 1359 proven. 21 refuted. 0 times theorem prover too weak. 4835 trivial. 0 not checked. [2018-01-20 23:52:01,069 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:52:01,069 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 23 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 23 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:52:01,072 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 23:52:01,072 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-20 23:52:01,119 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:52:01,132 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:52:01,159 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:52:01,216 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:52:01,369 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:52:01,404 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:52:01,422 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:52:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6215 backedges. 1359 proven. 21 refuted. 0 times theorem prover too weak. 4835 trivial. 0 not checked. [2018-01-20 23:52:01,558 INFO L314 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-01-20 23:52:01,716 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-01-20 23:52:01,717 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-20 23:52:01,718 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:52:01,718 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:52:01,718 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:52:01,718 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:52:01,718 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:52:01,718 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:52:01,718 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:52:01,719 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-20 23:52:01,719 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:52:01,719 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-20 23:52:01,719 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-20 23:52:01,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 11:52:01 BoogieIcfgContainer [2018-01-20 23:52:01,720 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-20 23:52:01,721 INFO L168 Benchmark]: Toolchain (without parser) took 48663.12 ms. Allocated memory was 305.7 MB in the beginning and 1.2 GB in the end (delta: 917.5 MB). Free memory was 266.6 MB in the beginning and 1.1 GB in the end (delta: -822.2 MB). Peak memory consumption was 95.3 MB. Max. memory is 5.3 GB. [2018-01-20 23:52:01,721 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 305.7 MB. Free memory is still 270.6 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-20 23:52:01,721 INFO L168 Benchmark]: CACSL2BoogieTranslator took 175.00 ms. Allocated memory is still 305.7 MB. Free memory was 266.6 MB in the beginning and 256.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-20 23:52:01,721 INFO L168 Benchmark]: Boogie Preprocessor took 31.73 ms. Allocated memory is still 305.7 MB. Free memory was 256.6 MB in the beginning and 254.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-20 23:52:01,722 INFO L168 Benchmark]: RCFGBuilder took 249.50 ms. Allocated memory is still 305.7 MB. Free memory was 254.6 MB in the beginning and 237.5 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 5.3 GB. [2018-01-20 23:52:01,722 INFO L168 Benchmark]: TraceAbstraction took 48200.31 ms. Allocated memory was 305.7 MB in the beginning and 1.2 GB in the end (delta: 917.5 MB). Free memory was 237.5 MB in the beginning and 1.1 GB in the end (delta: -851.3 MB). Peak memory consumption was 66.2 MB. Max. memory is 5.3 GB. [2018-01-20 23:52:01,724 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 305.7 MB. Free memory is still 270.6 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 175.00 ms. Allocated memory is still 305.7 MB. Free memory was 266.6 MB in the beginning and 256.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 31.73 ms. Allocated memory is still 305.7 MB. Free memory was 256.6 MB in the beginning and 254.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 249.50 ms. Allocated memory is still 305.7 MB. Free memory was 254.6 MB in the beginning and 237.5 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 48200.31 ms. Allocated memory was 305.7 MB in the beginning and 1.2 GB in the end (delta: 917.5 MB). Free memory was 237.5 MB in the beginning and 1.1 GB in the end (delta: -851.3 MB). Peak memory consumption was 66.2 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) : 0.421663 RENAME_VARIABLES(MILLISECONDS) : 0.239224 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.382070 PROJECTAWAY(MILLISECONDS) : 0.162487 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.067662 DISJOIN(MILLISECONDS) : 0.191884 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.275887 ADD_EQUALITY(MILLISECONDS) : 0.034466 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.010669 #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 : 48 LocStat_MAX_WEQGRAPH_SIZE : 3 LocStat_MAX_SIZEOF_WEQEDGELABEL : 1 LocStat_NO_SUPPORTING_EQUALITIES : 456 LocStat_NO_SUPPORTING_DISEQUALITIES : 120 LocStat_NO_DISJUNCTIONS : -96 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 58 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 69 TransStat_NO_SUPPORTING_DISEQUALITIES : 8 TransStat_NO_DISJUNCTIONS : 58 TransStat_MAX_NO_DISJUNCTIONS : 1 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.406532 RENAME_VARIABLES(MILLISECONDS) : 0.210645 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.362497 PROJECTAWAY(MILLISECONDS) : 0.177806 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.055222 DISJOIN(MILLISECONDS) : 1.331335 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.240811 ADD_EQUALITY(MILLISECONDS) : 0.021157 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.016124 #CONJOIN_DISJUNCTIVE : 232 #RENAME_VARIABLES : 535 #UNFREEZE : 0 #CONJOIN : 379 #PROJECTAWAY : 367 #ADD_WEAK_EQUALITY : 11 #DISJOIN : 66 #RENAME_VARIABLES_DISJUNCTIVE : 535 #ADD_EQUALITY : 71 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 4 - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 51 LocStat_MAX_WEQGRAPH_SIZE : 3 LocStat_MAX_SIZEOF_WEQEDGELABEL : 2 LocStat_NO_SUPPORTING_EQUALITIES : 480 LocStat_NO_SUPPORTING_DISEQUALITIES : 115 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) : 0.306618 RENAME_VARIABLES(MILLISECONDS) : 0.179311 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.278073 PROJECTAWAY(MILLISECONDS) : 0.153613 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.044236 DISJOIN(MILLISECONDS) : 0.088457 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.203164 ADD_EQUALITY(MILLISECONDS) : 0.021462 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.009139 #CONJOIN_DISJUNCTIVE : 278 #RENAME_VARIABLES : 625 #UNFREEZE : 0 #CONJOIN : 427 #PROJECTAWAY : 425 #ADD_WEAK_EQUALITY : 11 #DISJOIN : 62 #RENAME_VARIABLES_DISJUNCTIVE : 625 #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, 0.3s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 103 SDtfs, 18 SDslu, 26 SDs, 0 SdLazy, 36 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 3460 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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 572 with TraceHistMax 40, while TraceCheckSpWp was constructing backward predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 19. - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 error locations. TIMEOUT Result, 47.3s OverallTime, 14 OverallIterations, 40 TraceHistogramMax, 3.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 676 SDtfs, 1260 SDslu, 3865 SDs, 0 SdLazy, 2759 SolverSat, 295 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9169 GetRequests, 8838 SyntacticMatches, 85 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2170 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=261occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 6.0s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 708 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 26.3s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 6872 NumberOfCodeBlocks, 6198 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 11327 ConstructedInterpolants, 0 QuantifiedInterpolants, 5506099 SizeOfPredicates, 69 NumberOfNonLiveVariables, 9220 ConjunctsInSsa, 171 ConjunctsInUnsatCore, 53 InterpolantComputations, 6 PerfectInterpolantSequences, 54497/58561 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_true-valid-memsafety.c_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-20_23-52-01-736.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_true-valid-memsafety.c_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-VPDomainBenchmark-0-2018-01-20_23-52-01-736.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_true-valid-memsafety.c_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-BenchmarkWithCounters-0-2018-01-20_23-52-01-736.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_true-valid-memsafety.c_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-VPDomainBenchmark-1-2018-01-20_23-52-01-736.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_true-valid-memsafety.c_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-BenchmarkWithCounters-1-2018-01-20_23-52-01-736.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_true-valid-memsafety.c_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-VPDomainBenchmark-2-2018-01-20_23-52-01-736.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_true-valid-memsafety.c_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-BenchmarkWithCounters-2-2018-01-20_23-52-01-736.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_true-valid-memsafety.c_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-20_23-52-01-736.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_true-valid-memsafety.c_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-20_23-52-01-736.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_true-valid-memsafety.c_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-20_23-52-01-736.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_true-valid-memsafety.c_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-20_23-52-01-736.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_true-valid-memsafety.c_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-4-2018-01-20_23-52-01-736.csv Completed graceful shutdown