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/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrcat-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 23:17:25,588 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 23:17:25,589 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 23:17:25,604 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 23:17:25,605 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 23:17:25,606 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 23:17:25,607 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 23:17:25,608 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 23:17:25,610 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 23:17:25,611 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 23:17:25,612 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 23:17:25,612 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 23:17:25,613 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 23:17:25,614 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 23:17:25,615 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 23:17:25,618 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 23:17:25,620 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 23:17:25,622 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 23:17:25,623 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 23:17:25,624 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 23:17:25,627 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 23:17:25,627 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 23:17:25,627 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 23:17:25,628 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 23:17:25,629 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 23:17:25,630 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 23:17:25,631 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 23:17:25,631 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 23:17:25,632 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 23:17:25,632 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 23:17:25,632 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 23:17:25,633 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf [2018-01-24 23:17:25,641 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 23:17:25,641 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 23:17:25,642 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 23:17:25,642 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 23:17:25,642 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 23:17:25,643 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 23:17:25,643 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 23:17:25,643 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 23:17:25,643 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 23:17:25,643 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 23:17:25,644 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 23:17:25,644 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 23:17:25,644 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 23:17:25,644 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 23:17:25,644 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 23:17:25,644 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 23:17:25,644 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 23:17:25,644 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 23:17:25,645 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 23:17:25,645 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 23:17:25,645 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 23:17:25,645 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 23:17:25,645 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 23:17:25,645 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 23:17:25,646 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:17:25,646 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 23:17:25,646 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 23:17:25,646 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 23:17:25,646 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 23:17:25,646 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 23:17:25,647 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 23:17:25,647 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 23:17:25,647 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 23:17:25,647 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 23:17:25,648 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 23:17:25,648 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 23:17:25,680 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 23:17:25,690 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 23:17:25,693 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 23:17:25,694 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 23:17:25,695 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 23:17:25,695 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrcat-alloca_true-valid-memsafety_true-termination.i [2018-01-24 23:17:25,852 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 23:17:25,857 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 23:17:25,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 23:17:25,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 23:17:25,864 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 23:17:25,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:17:25" (1/1) ... [2018-01-24 23:17:25,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4545185a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:25, skipping insertion in model container [2018-01-24 23:17:25,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:17:25" (1/1) ... [2018-01-24 23:17:25,882 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:17:25,919 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:17:26,041 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:17:26,061 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:17:26,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:26 WrapperNode [2018-01-24 23:17:26,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 23:17:26,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 23:17:26,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 23:17:26,071 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 23:17:26,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:26" (1/1) ... [2018-01-24 23:17:26,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:26" (1/1) ... [2018-01-24 23:17:26,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:26" (1/1) ... [2018-01-24 23:17:26,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:26" (1/1) ... [2018-01-24 23:17:26,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:26" (1/1) ... [2018-01-24 23:17:26,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:26" (1/1) ... [2018-01-24 23:17:26,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:26" (1/1) ... [2018-01-24 23:17:26,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 23:17:26,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 23:17:26,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 23:17:26,109 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 23:17:26,110 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:26" (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 [2018-01-24 23:17:26,163 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 23:17:26,163 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 23:17:26,163 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrcat [2018-01-24 23:17:26,163 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 23:17:26,163 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 23:17:26,164 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 23:17:26,164 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 23:17:26,164 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 23:17:26,164 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 23:17:26,164 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 23:17:26,164 INFO L128 BoogieDeclarations]: Found specification of procedure cstrcat [2018-01-24 23:17:26,165 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 23:17:26,165 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 23:17:26,165 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 23:17:26,371 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 23:17:26,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:17:26 BoogieIcfgContainer [2018-01-24 23:17:26,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 23:17:26,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 23:17:26,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 23:17:26,374 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 23:17:26,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:17:25" (1/3) ... [2018-01-24 23:17:26,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611dd326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:17:26, skipping insertion in model container [2018-01-24 23:17:26,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:26" (2/3) ... [2018-01-24 23:17:26,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611dd326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:17:26, skipping insertion in model container [2018-01-24 23:17:26,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:17:26" (3/3) ... [2018-01-24 23:17:26,377 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcat-alloca_true-valid-memsafety_true-termination.i [2018-01-24 23:17:26,385 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 23:17:26,390 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2018-01-24 23:17:26,426 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 23:17:26,427 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 23:17:26,427 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 23:17:26,427 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 23:17:26,427 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 23:17:26,427 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 23:17:26,428 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 23:17:26,428 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 23:17:26,429 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 23:17:26,450 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2018-01-24 23:17:26,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-24 23:17:26,458 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:26,459 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:17:26,459 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:26,465 INFO L82 PathProgramCache]: Analyzing trace with hash 967400660, now seen corresponding path program 1 times [2018-01-24 23:17:26,467 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:26,508 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:26,508 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:26,508 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:26,508 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:26,560 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:17:26,616 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:26,617 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 23:17:26,617 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:26,620 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 23:17:26,633 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 23:17:26,633 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:17:26,635 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2018-01-24 23:17:26,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:26,809 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2018-01-24 23:17:26,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 23:17:26,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-01-24 23:17:26,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:26,824 INFO L225 Difference]: With dead ends: 73 [2018-01-24 23:17:26,824 INFO L226 Difference]: Without dead ends: 47 [2018-01-24 23:17:26,828 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:17:26,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-01-24 23:17:26,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-01-24 23:17:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-01-24 23:17:26,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2018-01-24 23:17:26,867 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 11 [2018-01-24 23:17:26,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:26,868 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2018-01-24 23:17:26,868 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 23:17:26,868 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2018-01-24 23:17:26,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 23:17:26,868 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:26,868 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:17:26,868 INFO L371 AbstractCegarLoop]: === Iteration 2 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:26,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1512837349, now seen corresponding path program 1 times [2018-01-24 23:17:26,869 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:26,870 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:26,870 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:26,870 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:26,870 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:26,894 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:26,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:17:26,963 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:26,963 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:17:26,963 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:26,966 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:17:26,966 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:17:26,966 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:17:26,967 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 4 states. [2018-01-24 23:17:27,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:27,027 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2018-01-24 23:17:27,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:17:27,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-01-24 23:17:27,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:27,028 INFO L225 Difference]: With dead ends: 47 [2018-01-24 23:17:27,029 INFO L226 Difference]: Without dead ends: 46 [2018-01-24 23:17:27,030 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 [2018-01-24 23:17:27,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-24 23:17:27,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-01-24 23:17:27,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-01-24 23:17:27,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2018-01-24 23:17:27,036 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 15 [2018-01-24 23:17:27,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:27,037 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2018-01-24 23:17:27,037 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:17:27,037 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2018-01-24 23:17:27,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 23:17:27,037 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:27,038 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:17:27,038 INFO L371 AbstractCegarLoop]: === Iteration 3 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:27,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1512837350, now seen corresponding path program 1 times [2018-01-24 23:17:27,038 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:27,039 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:27,039 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:27,039 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:27,040 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:27,059 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:17:27,170 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:27,170 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:17:27,170 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:27,170 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:17:27,171 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:17:27,171 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:17:27,171 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 6 states. [2018-01-24 23:17:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:27,255 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2018-01-24 23:17:27,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:17:27,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-01-24 23:17:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:27,257 INFO L225 Difference]: With dead ends: 46 [2018-01-24 23:17:27,257 INFO L226 Difference]: Without dead ends: 45 [2018-01-24 23:17:27,257 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:17:27,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-24 23:17:27,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-01-24 23:17:27,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-24 23:17:27,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2018-01-24 23:17:27,263 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 15 [2018-01-24 23:17:27,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:27,263 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2018-01-24 23:17:27,263 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:17:27,263 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2018-01-24 23:17:27,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 23:17:27,264 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:27,264 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:17:27,264 INFO L371 AbstractCegarLoop]: === Iteration 4 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:27,264 INFO L82 PathProgramCache]: Analyzing trace with hash -346682393, now seen corresponding path program 1 times [2018-01-24 23:17:27,264 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:27,265 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:27,265 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:27,265 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:27,265 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:27,279 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:27,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:17:27,321 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:27,321 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:17:27,321 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:27,321 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:17:27,321 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:17:27,321 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:17:27,322 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 4 states. [2018-01-24 23:17:27,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:27,411 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-01-24 23:17:27,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:17:27,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-01-24 23:17:27,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:27,413 INFO L225 Difference]: With dead ends: 45 [2018-01-24 23:17:27,413 INFO L226 Difference]: Without dead ends: 44 [2018-01-24 23:17:27,413 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:17:27,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-01-24 23:17:27,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-01-24 23:17:27,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-24 23:17:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2018-01-24 23:17:27,419 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 16 [2018-01-24 23:17:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:27,420 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2018-01-24 23:17:27,420 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:17:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2018-01-24 23:17:27,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 23:17:27,421 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:27,421 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:17:27,421 INFO L371 AbstractCegarLoop]: === Iteration 5 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:27,421 INFO L82 PathProgramCache]: Analyzing trace with hash -346682392, now seen corresponding path program 1 times [2018-01-24 23:17:27,421 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:27,422 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:27,422 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:27,423 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:27,423 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:27,437 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:17:27,494 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:27,494 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:17:27,494 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:27,495 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:17:27,495 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:17:27,495 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:17:27,495 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 6 states. [2018-01-24 23:17:27,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:27,613 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2018-01-24 23:17:27,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 23:17:27,613 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-01-24 23:17:27,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:27,616 INFO L225 Difference]: With dead ends: 60 [2018-01-24 23:17:27,616 INFO L226 Difference]: Without dead ends: 59 [2018-01-24 23:17:27,617 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-01-24 23:17:27,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-24 23:17:27,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2018-01-24 23:17:27,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-01-24 23:17:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2018-01-24 23:17:27,631 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 16 [2018-01-24 23:17:27,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:27,631 INFO L432 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2018-01-24 23:17:27,631 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:17:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2018-01-24 23:17:27,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 23:17:27,632 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:27,632 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:17:27,633 INFO L371 AbstractCegarLoop]: === Iteration 6 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:27,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1156029018, now seen corresponding path program 1 times [2018-01-24 23:17:27,633 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:27,634 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:27,634 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:27,634 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:27,635 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:27,648 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:17:27,725 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:27,725 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:17:27,726 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:27,726 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 23:17:27,726 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 23:17:27,726 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:17:27,727 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 7 states. [2018-01-24 23:17:27,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:27,815 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2018-01-24 23:17:27,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 23:17:27,815 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-01-24 23:17:27,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:27,816 INFO L225 Difference]: With dead ends: 51 [2018-01-24 23:17:27,816 INFO L226 Difference]: Without dead ends: 50 [2018-01-24 23:17:27,817 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-01-24 23:17:27,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-24 23:17:27,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2018-01-24 23:17:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-24 23:17:27,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2018-01-24 23:17:27,823 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 16 [2018-01-24 23:17:27,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:27,823 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2018-01-24 23:17:27,823 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 23:17:27,823 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2018-01-24 23:17:27,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 23:17:27,824 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:27,824 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] [2018-01-24 23:17:27,824 INFO L371 AbstractCegarLoop]: === Iteration 7 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:27,824 INFO L82 PathProgramCache]: Analyzing trace with hash -131455439, now seen corresponding path program 1 times [2018-01-24 23:17:27,825 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:27,826 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:27,826 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:27,826 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:27,826 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:27,839 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:17:27,865 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:27,865 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:17:27,865 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:27,866 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:17:27,866 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:17:27,866 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:17:27,866 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 5 states. [2018-01-24 23:17:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:27,913 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2018-01-24 23:17:27,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:17:27,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-01-24 23:17:27,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:27,914 INFO L225 Difference]: With dead ends: 43 [2018-01-24 23:17:27,915 INFO L226 Difference]: Without dead ends: 42 [2018-01-24 23:17:27,915 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:17:27,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-01-24 23:17:27,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-01-24 23:17:27,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-24 23:17:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2018-01-24 23:17:27,918 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 20 [2018-01-24 23:17:27,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:27,919 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2018-01-24 23:17:27,919 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:17:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2018-01-24 23:17:27,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 23:17:27,919 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:27,920 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] [2018-01-24 23:17:27,920 INFO L371 AbstractCegarLoop]: === Iteration 8 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:27,920 INFO L82 PathProgramCache]: Analyzing trace with hash -131455438, now seen corresponding path program 1 times [2018-01-24 23:17:27,920 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:27,921 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:27,921 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:27,921 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:27,921 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:27,931 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:17:28,039 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:28,039 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:17:28,039 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:28,039 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 23:17:28,039 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 23:17:28,040 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:17:28,040 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 7 states. [2018-01-24 23:17:28,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:28,177 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-01-24 23:17:28,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 23:17:28,177 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-01-24 23:17:28,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:28,178 INFO L225 Difference]: With dead ends: 49 [2018-01-24 23:17:28,178 INFO L226 Difference]: Without dead ends: 48 [2018-01-24 23:17:28,178 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-01-24 23:17:28,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-01-24 23:17:28,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2018-01-24 23:17:28,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-24 23:17:28,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2018-01-24 23:17:28,184 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 20 [2018-01-24 23:17:28,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:28,184 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2018-01-24 23:17:28,184 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 23:17:28,185 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2018-01-24 23:17:28,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-24 23:17:28,185 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:28,186 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] [2018-01-24 23:17:28,186 INFO L371 AbstractCegarLoop]: === Iteration 9 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:28,186 INFO L82 PathProgramCache]: Analyzing trace with hash -313436100, now seen corresponding path program 1 times [2018-01-24 23:17:28,186 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:28,187 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:28,187 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:28,187 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:28,187 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:28,198 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:17:28,244 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:28,244 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:17:28,244 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:28,244 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:17:28,245 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:17:28,245 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:17:28,245 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 6 states. [2018-01-24 23:17:28,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:28,320 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2018-01-24 23:17:28,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:17:28,320 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2018-01-24 23:17:28,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:28,321 INFO L225 Difference]: With dead ends: 44 [2018-01-24 23:17:28,321 INFO L226 Difference]: Without dead ends: 43 [2018-01-24 23:17:28,322 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:17:28,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-24 23:17:28,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-24 23:17:28,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-24 23:17:28,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2018-01-24 23:17:28,326 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 24 [2018-01-24 23:17:28,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:28,327 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2018-01-24 23:17:28,327 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:17:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2018-01-24 23:17:28,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-24 23:17:28,328 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:28,328 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] [2018-01-24 23:17:28,328 INFO L371 AbstractCegarLoop]: === Iteration 10 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:28,329 INFO L82 PathProgramCache]: Analyzing trace with hash -313436099, now seen corresponding path program 1 times [2018-01-24 23:17:28,329 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:28,330 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:28,330 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:28,330 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:28,330 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:28,343 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:17:28,463 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:28,463 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 23:17:28,464 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:28,464 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 23:17:28,464 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 23:17:28,464 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-01-24 23:17:28,465 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 9 states. [2018-01-24 23:17:28,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:28,608 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-01-24 23:17:28,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-24 23:17:28,609 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2018-01-24 23:17:28,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:28,610 INFO L225 Difference]: With dead ends: 51 [2018-01-24 23:17:28,610 INFO L226 Difference]: Without dead ends: 50 [2018-01-24 23:17:28,610 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-01-24 23:17:28,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-24 23:17:28,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2018-01-24 23:17:28,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-01-24 23:17:28,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2018-01-24 23:17:28,616 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 24 [2018-01-24 23:17:28,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:28,617 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2018-01-24 23:17:28,617 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 23:17:28,617 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2018-01-24 23:17:28,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-24 23:17:28,618 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:28,618 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] [2018-01-24 23:17:28,618 INFO L371 AbstractCegarLoop]: === Iteration 11 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:28,618 INFO L82 PathProgramCache]: Analyzing trace with hash -313382859, now seen corresponding path program 1 times [2018-01-24 23:17:28,619 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:28,619 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:28,620 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:28,620 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:28,620 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:28,632 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:17:28,712 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:17:28,713 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 23:17:28,713 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-01-24 23:17:28,715 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [6], [7], [9], [14], [16], [44], [49], [53], [59], [66], [67], [68], [69], [70], [71], [74], [85], [86], [87], [89] [2018-01-24 23:17:28,758 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 23:17:28,758 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-24 23:18:02,254 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-24 23:18:02,255 INFO L268 AbstractInterpreter]: Visited 23 different actions 28 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-01-24 23:18:02,263 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-24 23:18:02,263 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:18:02,263 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 [2018-01-24 23:18:02,281 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:18:02,281 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 23:18:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:18:02,328 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 23:18:02,392 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-01-24 23:18:02,394 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-01-24 23:18:02,394 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 23:18:02,402 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 23:18:02,403 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 23:18:02,404 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2018-01-24 23:18:02,440 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-01-24 23:18:02,442 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2018-01-24 23:18:02,442 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 23:18:02,443 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 23:18:02,444 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 23:18:02,444 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2018-01-24 23:18:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:18:02,455 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 23:18:02,462 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2018-01-24 23:18:02,483 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2018-01-24 23:18:02,494 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 23:18:02,496 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 23:18:02,497 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 23:18:02,497 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:13, output treesize:3 [2018-01-24 23:18:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:18:02,531 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-01-24 23:18:02,531 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [7] total 13 [2018-01-24 23:18:02,531 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:18:02,532 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 23:18:02,532 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 23:18:02,532 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-01-24 23:18:02,532 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 7 states. [2018-01-24 23:18:02,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:18:02,678 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2018-01-24 23:18:02,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 23:18:02,678 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2018-01-24 23:18:02,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:18:02,679 INFO L225 Difference]: With dead ends: 97 [2018-01-24 23:18:02,679 INFO L226 Difference]: Without dead ends: 71 [2018-01-24 23:18:02,680 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2018-01-24 23:18:02,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-01-24 23:18:02,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2018-01-24 23:18:02,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-24 23:18:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2018-01-24 23:18:02,689 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 24 [2018-01-24 23:18:02,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:18:02,689 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2018-01-24 23:18:02,689 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 23:18:02,689 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2018-01-24 23:18:02,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-24 23:18:02,690 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:18:02,691 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] [2018-01-24 23:18:02,691 INFO L371 AbstractCegarLoop]: === Iteration 12 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:18:02,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1334451213, now seen corresponding path program 1 times [2018-01-24 23:18:02,691 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:18:02,692 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:18:02,692 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:18:02,692 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:18:02,692 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:18:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:18:02,704 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:18:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:18:02,829 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:18:02,829 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 23:18:02,830 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-01-24 23:18:02,830 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [6], [7], [9], [14], [16], [44], [49], [53], [61], [66], [67], [68], [69], [70], [71], [74], [85], [86], [87], [89] [2018-01-24 23:18:02,831 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 23:18:02,831 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown