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_preciseopt.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-25 02:40:44,788 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-25 02:40:44,790 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-25 02:40:44,803 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-25 02:40:44,803 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-25 02:40:44,804 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-25 02:40:44,805 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-25 02:40:44,807 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-25 02:40:44,808 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-25 02:40:44,809 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-25 02:40:44,810 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-25 02:40:44,810 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-25 02:40:44,811 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-25 02:40:44,811 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-25 02:40:44,812 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-25 02:40:44,815 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-25 02:40:44,817 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-25 02:40:44,819 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-25 02:40:44,821 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-25 02:40:44,822 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-25 02:40:44,824 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-25 02:40:44,825 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-25 02:40:44,825 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-25 02:40:44,826 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-25 02:40:44,827 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-25 02:40:44,828 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-25 02:40:44,829 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-25 02:40:44,829 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-25 02:40:44,830 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-25 02:40:44,830 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-25 02:40:44,830 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-25 02:40:44,831 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_preciseopt.epf [2018-01-25 02:40:44,842 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-25 02:40:44,842 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-25 02:40:44,843 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-25 02:40:44,843 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-25 02:40:44,843 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-25 02:40:44,844 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-25 02:40:44,844 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-25 02:40:44,844 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-25 02:40:44,844 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-25 02:40:44,845 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-25 02:40:44,845 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-25 02:40:44,846 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-25 02:40:44,846 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-25 02:40:44,846 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-25 02:40:44,846 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-25 02:40:44,846 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-25 02:40:44,846 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-25 02:40:44,847 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-25 02:40:44,847 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-25 02:40:44,847 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-25 02:40:44,847 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-25 02:40:44,848 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-25 02:40:44,848 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-25 02:40:44,848 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-25 02:40:44,848 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-25 02:40:44,848 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 02:40:44,849 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-25 02:40:44,849 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-25 02:40:44,849 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-25 02:40:44,849 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-25 02:40:44,849 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-25 02:40:44,849 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-25 02:40:44,850 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-25 02:40:44,850 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-25 02:40:44,850 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-25 02:40:44,851 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-25 02:40:44,851 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-25 02:40:44,887 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-25 02:40:44,897 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-25 02:40:44,901 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-25 02:40:44,903 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-25 02:40:44,903 INFO L276 PluginConnector]: CDTParser initialized [2018-01-25 02:40:44,903 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i [2018-01-25 02:40:45,071 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-25 02:40:45,077 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-25 02:40:45,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-25 02:40:45,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-25 02:40:45,083 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-25 02:40:45,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 02:40:45" (1/1) ... [2018-01-25 02:40:45,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577bb5b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:40:45, skipping insertion in model container [2018-01-25 02:40:45,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 02:40:45" (1/1) ... [2018-01-25 02:40:45,101 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 02:40:45,139 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 02:40:45,265 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 02:40:45,281 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 02:40:45,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:40:45 WrapperNode [2018-01-25 02:40:45,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-25 02:40:45,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-25 02:40:45,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-25 02:40:45,289 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-25 02:40:45,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:40:45" (1/1) ... [2018-01-25 02:40:45,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:40:45" (1/1) ... [2018-01-25 02:40:45,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:40:45" (1/1) ... [2018-01-25 02:40:45,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:40:45" (1/1) ... [2018-01-25 02:40:45,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:40:45" (1/1) ... [2018-01-25 02:40:45,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:40:45" (1/1) ... [2018-01-25 02:40:45,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:40:45" (1/1) ... [2018-01-25 02:40:45,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-25 02:40:45,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-25 02:40:45,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-25 02:40:45,329 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-25 02:40:45,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:40:45" (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 [2018-01-25 02:40:45,377 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-25 02:40:45,378 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-25 02:40:45,378 INFO L136 BoogieDeclarations]: Found implementation of procedure cstpcpy [2018-01-25 02:40:45,378 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-25 02:40:45,378 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-25 02:40:45,378 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-25 02:40:45,378 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-25 02:40:45,379 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-25 02:40:45,379 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-25 02:40:45,379 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-25 02:40:45,379 INFO L128 BoogieDeclarations]: Found specification of procedure cstpcpy [2018-01-25 02:40:45,379 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-25 02:40:45,379 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-25 02:40:45,380 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-25 02:40:45,661 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-25 02:40:45,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 02:40:45 BoogieIcfgContainer [2018-01-25 02:40:45,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-25 02:40:45,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-25 02:40:45,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-25 02:40:45,664 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-25 02:40:45,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.01 02:40:45" (1/3) ... [2018-01-25 02:40:45,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6533a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 02:40:45, skipping insertion in model container [2018-01-25 02:40:45,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:40:45" (2/3) ... [2018-01-25 02:40:45,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6533a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 02:40:45, skipping insertion in model container [2018-01-25 02:40:45,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 02:40:45" (3/3) ... [2018-01-25 02:40:45,668 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i [2018-01-25 02:40:45,674 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-25 02:40:45,680 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-01-25 02:40:45,728 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-25 02:40:45,728 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-25 02:40:45,728 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-25 02:40:45,728 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-25 02:40:45,729 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-25 02:40:45,729 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-25 02:40:45,729 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-25 02:40:45,729 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-25 02:40:45,730 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-25 02:40:45,759 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-25 02:40:45,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-01-25 02:40:45,769 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:40:45,785 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:40:45,785 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, cstpcpyErr0RequiresViolation, cstpcpyErr3RequiresViolation, cstpcpyErr1RequiresViolation, cstpcpyErr2RequiresViolation]=== [2018-01-25 02:40:45,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1122979584, now seen corresponding path program 1 times [2018-01-25 02:40:45,794 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:40:45,844 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:40:45,845 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:40:45,845 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:40:45,845 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:40:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:40:45,895 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:40:45,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:40:45,966 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:40:45,966 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-25 02:40:45,967 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:40:45,969 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-25 02:40:45,981 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-25 02:40:45,982 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-25 02:40:45,984 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2018-01-25 02:40:46,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:40:46,120 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2018-01-25 02:40:46,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-25 02:40:46,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-01-25 02:40:46,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:40:46,222 INFO L225 Difference]: With dead ends: 54 [2018-01-25 02:40:46,222 INFO L226 Difference]: Without dead ends: 37 [2018-01-25 02:40:46,226 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 [2018-01-25 02:40:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-25 02:40:46,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-25 02:40:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-25 02:40:46,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-01-25 02:40:46,254 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 10 [2018-01-25 02:40:46,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:40:46,254 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-01-25 02:40:46,254 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-25 02:40:46,254 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-01-25 02:40:46,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-25 02:40:46,255 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:40:46,255 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:40:46,255 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, cstpcpyErr0RequiresViolation, cstpcpyErr3RequiresViolation, cstpcpyErr1RequiresViolation, cstpcpyErr2RequiresViolation]=== [2018-01-25 02:40:46,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1918226348, now seen corresponding path program 1 times [2018-01-25 02:40:46,255 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:40:46,256 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:40:46,256 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:40:46,256 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:40:46,256 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:40:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:40:46,276 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:40:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:40:46,338 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:40:46,338 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 02:40:46,338 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:40:46,340 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 02:40:46,341 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 02:40:46,341 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 02:40:46,341 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 4 states. [2018-01-25 02:40:46,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:40:46,423 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2018-01-25 02:40:46,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 02:40:46,424 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-01-25 02:40:46,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:40:46,425 INFO L225 Difference]: With dead ends: 37 [2018-01-25 02:40:46,425 INFO L226 Difference]: Without dead ends: 36 [2018-01-25 02:40:46,427 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 [2018-01-25 02:40:46,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-25 02:40:46,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-25 02:40:46,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-25 02:40:46,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-01-25 02:40:46,433 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 14 [2018-01-25 02:40:46,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:40:46,434 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-01-25 02:40:46,434 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 02:40:46,434 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-01-25 02:40:46,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-25 02:40:46,435 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:40:46,435 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:40:46,435 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, cstpcpyErr0RequiresViolation, cstpcpyErr3RequiresViolation, cstpcpyErr1RequiresViolation, cstpcpyErr2RequiresViolation]=== [2018-01-25 02:40:46,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1918226347, now seen corresponding path program 1 times [2018-01-25 02:40:46,436 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:40:46,437 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:40:46,437 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:40:46,437 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:40:46,437 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:40:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:40:46,458 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:40:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:40:46,568 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:40:46,568 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 02:40:46,568 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:40:46,568 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 02:40:46,569 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 02:40:46,569 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-25 02:40:46,569 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 5 states. [2018-01-25 02:40:46,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:40:46,622 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-01-25 02:40:46,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-25 02:40:46,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-01-25 02:40:46,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:40:46,623 INFO L225 Difference]: With dead ends: 36 [2018-01-25 02:40:46,623 INFO L226 Difference]: Without dead ends: 35 [2018-01-25 02:40:46,624 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-01-25 02:40:46,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-01-25 02:40:46,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-01-25 02:40:46,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-25 02:40:46,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-01-25 02:40:46,629 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 14 [2018-01-25 02:40:46,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:40:46,630 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-01-25 02:40:46,630 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 02:40:46,630 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-01-25 02:40:46,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-25 02:40:46,630 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:40:46,630 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:40:46,630 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, cstpcpyErr0RequiresViolation, cstpcpyErr3RequiresViolation, cstpcpyErr1RequiresViolation, cstpcpyErr2RequiresViolation]=== [2018-01-25 02:40:46,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1371633306, now seen corresponding path program 1 times [2018-01-25 02:40:46,631 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:40:46,631 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:40:46,632 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:40:46,632 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:40:46,632 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:40:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:40:46,647 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:40:46,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:40:46,691 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:40:46,691 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 02:40:46,691 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:40:46,691 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 02:40:46,692 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 02:40:46,692 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 02:40:46,692 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 5 states. [2018-01-25 02:40:46,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:40:46,757 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-01-25 02:40:46,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 02:40:46,757 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-01-25 02:40:46,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:40:46,758 INFO L225 Difference]: With dead ends: 35 [2018-01-25 02:40:46,758 INFO L226 Difference]: Without dead ends: 34 [2018-01-25 02:40:46,759 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 [2018-01-25 02:40:46,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-01-25 02:40:46,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-01-25 02:40:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-01-25 02:40:46,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-01-25 02:40:46,765 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 18 [2018-01-25 02:40:46,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:40:46,765 INFO L432 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-01-25 02:40:46,765 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 02:40:46,765 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-01-25 02:40:46,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-25 02:40:46,766 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:40:46,766 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:40:46,766 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, cstpcpyErr0RequiresViolation, cstpcpyErr3RequiresViolation, cstpcpyErr1RequiresViolation, cstpcpyErr2RequiresViolation]=== [2018-01-25 02:40:46,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1371633307, now seen corresponding path program 1 times [2018-01-25 02:40:46,767 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:40:46,768 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:40:46,768 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:40:46,768 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:40:46,768 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:40:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:40:46,783 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:40:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:40:46,881 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:40:46,881 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-25 02:40:46,881 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:40:46,881 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-25 02:40:46,881 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-25 02:40:46,882 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-01-25 02:40:46,882 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 8 states. [2018-01-25 02:40:46,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:40:46,991 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-01-25 02:40:47,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-25 02:40:47,011 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2018-01-25 02:40:47,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:40:47,014 INFO L225 Difference]: With dead ends: 45 [2018-01-25 02:40:47,015 INFO L226 Difference]: Without dead ends: 44 [2018-01-25 02:40:47,015 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-01-25 02:40:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-01-25 02:40:47,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2018-01-25 02:40:47,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-25 02:40:47,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-01-25 02:40:47,021 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 18 [2018-01-25 02:40:47,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:40:47,021 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-01-25 02:40:47,021 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-25 02:40:47,021 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-01-25 02:40:47,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-25 02:40:47,022 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:40:47,022 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:40:47,022 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, cstpcpyErr0RequiresViolation, cstpcpyErr3RequiresViolation, cstpcpyErr1RequiresViolation, cstpcpyErr2RequiresViolation]=== [2018-01-25 02:40:47,022 INFO L82 PathProgramCache]: Analyzing trace with hash -429040459, now seen corresponding path program 1 times [2018-01-25 02:40:47,022 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:40:47,023 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:40:47,024 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:40:47,024 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:40:47,024 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:40:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:40:47,044 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:40:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:40:47,137 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:40:47,137 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-25 02:40:47,137 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:40:47,138 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-25 02:40:47,138 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-25 02:40:47,138 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-01-25 02:40:47,138 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 8 states. [2018-01-25 02:40:47,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:40:47,246 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-01-25 02:40:47,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-25 02:40:47,247 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-01-25 02:40:47,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:40:47,248 INFO L225 Difference]: With dead ends: 36 [2018-01-25 02:40:47,248 INFO L226 Difference]: Without dead ends: 35 [2018-01-25 02:40:47,248 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-01-25 02:40:47,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-01-25 02:40:47,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-01-25 02:40:47,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-25 02:40:47,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-01-25 02:40:47,253 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 19 [2018-01-25 02:40:47,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:40:47,253 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-01-25 02:40:47,254 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-25 02:40:47,254 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-01-25 02:40:47,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-25 02:40:47,254 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:40:47,254 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:40:47,255 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, cstpcpyErr0RequiresViolation, cstpcpyErr3RequiresViolation, cstpcpyErr1RequiresViolation, cstpcpyErr2RequiresViolation]=== [2018-01-25 02:40:47,255 INFO L82 PathProgramCache]: Analyzing trace with hash -429040458, now seen corresponding path program 1 times [2018-01-25 02:40:47,255 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:40:47,256 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:40:47,256 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:40:47,256 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:40:47,257 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:40:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:40:47,270 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:40:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:40:47,367 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:40:47,367 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-25 02:40:47,368 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:40:47,368 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-25 02:40:47,368 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-25 02:40:47,369 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-01-25 02:40:47,369 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 8 states. [2018-01-25 02:40:47,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:40:47,505 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2018-01-25 02:40:47,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-25 02:40:47,506 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-01-25 02:40:47,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:40:47,507 INFO L225 Difference]: With dead ends: 42 [2018-01-25 02:40:47,507 INFO L226 Difference]: Without dead ends: 41 [2018-01-25 02:40:47,507 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-01-25 02:40:47,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-25 02:40:47,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2018-01-25 02:40:47,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-25 02:40:47,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-01-25 02:40:47,512 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 19 [2018-01-25 02:40:47,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:40:47,512 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-01-25 02:40:47,512 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-25 02:40:47,512 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-01-25 02:40:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-25 02:40:47,513 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:40:47,513 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] [2018-01-25 02:40:47,513 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, cstpcpyErr0RequiresViolation, cstpcpyErr3RequiresViolation, cstpcpyErr1RequiresViolation, cstpcpyErr2RequiresViolation]=== [2018-01-25 02:40:47,513 INFO L82 PathProgramCache]: Analyzing trace with hash 39867865, now seen corresponding path program 1 times [2018-01-25 02:40:47,513 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:40:47,514 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:40:47,514 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:40:47,514 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:40:47,515 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:40:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:40:47,529 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:40:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:40:47,725 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:40:47,725 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-01-25 02:40:47,725 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:40:47,726 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-25 02:40:47,726 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-25 02:40:47,726 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-01-25 02:40:47,726 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 11 states. [2018-01-25 02:40:48,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:40:48,141 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2018-01-25 02:40:48,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-25 02:40:48,141 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2018-01-25 02:40:48,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:40:48,142 INFO L225 Difference]: With dead ends: 91 [2018-01-25 02:40:48,142 INFO L226 Difference]: Without dead ends: 74 [2018-01-25 02:40:48,142 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2018-01-25 02:40:48,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-01-25 02:40:48,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2018-01-25 02:40:48,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-25 02:40:48,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2018-01-25 02:40:48,156 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 23 [2018-01-25 02:40:48,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:40:48,156 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2018-01-25 02:40:48,156 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-25 02:40:48,156 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2018-01-25 02:40:48,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-25 02:40:48,157 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:40:48,157 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] [2018-01-25 02:40:48,157 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, cstpcpyErr0RequiresViolation, cstpcpyErr3RequiresViolation, cstpcpyErr1RequiresViolation, cstpcpyErr2RequiresViolation]=== [2018-01-25 02:40:48,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1548480037, now seen corresponding path program 1 times [2018-01-25 02:40:48,157 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:40:48,158 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:40:48,158 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:40:48,158 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:40:48,159 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:40:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:40:48,175 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:40:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:40:48,382 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-25 02:40:48,382 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-25 02:40:48,384 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-01-25 02:40:48,386 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [10], [16], [21], [22], [23], [24], [25], [26], [37], [41], [42], [44], [45], [52], [54], [60], [61], [62], [64] [2018-01-25 02:40:48,440 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-25 02:40:48,440 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