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_mostprecise.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cbzero-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 19:50:48,909 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 19:50:48,944 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 19:50:48,956 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 19:50:48,956 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 19:50:48,957 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 19:50:48,958 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 19:50:48,960 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 19:50:48,962 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 19:50:48,963 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 19:50:48,963 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 19:50:48,963 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 19:50:48,964 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 19:50:48,965 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 19:50:48,966 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 19:50:48,969 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 19:50:48,971 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 19:50:48,973 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 19:50:48,974 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 19:50:48,975 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 19:50:48,977 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 19:50:48,978 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 19:50:48,978 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 19:50:48,979 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 19:50:48,980 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 19:50:48,981 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 19:50:48,981 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 19:50:48,982 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 19:50:48,982 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 19:50:48,982 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 19:50:48,983 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 19:50:48,983 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_mostprecise.epf [2018-01-24 19:50:48,993 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 19:50:48,993 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 19:50:48,994 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 19:50:48,994 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 19:50:48,995 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 19:50:48,995 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 19:50:48,995 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 19:50:48,995 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 19:50:48,995 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 19:50:48,996 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 19:50:48,996 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 19:50:48,996 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 19:50:48,996 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 19:50:48,997 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 19:50:48,997 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 19:50:48,997 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 19:50:48,997 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 19:50:48,997 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 19:50:48,998 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 19:50:48,998 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 19:50:48,998 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 19:50:48,998 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 19:50:48,998 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 19:50:48,999 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 19:50:48,999 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 19:50:48,999 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 19:50:48,999 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 19:50:48,999 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 19:50:49,000 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 19:50:49,000 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 19:50:49,000 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 19:50:49,000 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 19:50:49,000 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 19:50:49,001 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 19:50:49,001 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 19:50:49,002 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 19:50:49,002 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 19:50:49,035 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 19:50:49,047 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 19:50:49,051 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 19:50:49,053 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 19:50:49,053 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 19:50:49,054 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cbzero-alloca_true-valid-memsafety_true-termination.i [2018-01-24 19:50:49,201 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 19:50:49,207 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 19:50:49,208 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 19:50:49,208 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 19:50:49,212 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 19:50:49,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 07:50:49" (1/1) ... [2018-01-24 19:50:49,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6193682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:50:49, skipping insertion in model container [2018-01-24 19:50:49,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 07:50:49" (1/1) ... [2018-01-24 19:50:49,230 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 19:50:49,266 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 19:50:49,380 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 19:50:49,393 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 19:50:49,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:50:49 WrapperNode [2018-01-24 19:50:49,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 19:50:49,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 19:50:49,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 19:50:49,399 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 19:50:49,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:50:49" (1/1) ... [2018-01-24 19:50:49,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:50:49" (1/1) ... [2018-01-24 19:50:49,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:50:49" (1/1) ... [2018-01-24 19:50:49,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:50:49" (1/1) ... [2018-01-24 19:50:49,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:50:49" (1/1) ... [2018-01-24 19:50:49,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:50:49" (1/1) ... [2018-01-24 19:50:49,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:50:49" (1/1) ... [2018-01-24 19:50:49,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 19:50:49,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 19:50:49,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 19:50:49,438 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 19:50:49,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:50:49" (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 19:50:49,494 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 19:50:49,494 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 19:50:49,494 INFO L136 BoogieDeclarations]: Found implementation of procedure cbzero [2018-01-24 19:50:49,494 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 19:50:49,494 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 19:50:49,494 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 19:50:49,495 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 19:50:49,495 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 19:50:49,495 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 19:50:49,495 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 19:50:49,495 INFO L128 BoogieDeclarations]: Found specification of procedure cbzero [2018-01-24 19:50:49,495 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 19:50:49,496 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 19:50:49,496 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 19:50:49,645 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 19:50:49,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 07:50:49 BoogieIcfgContainer [2018-01-24 19:50:49,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 19:50:49,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 19:50:49,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 19:50:49,647 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 19:50:49,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 07:50:49" (1/3) ... [2018-01-24 19:50:49,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c5dafc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 07:50:49, skipping insertion in model container [2018-01-24 19:50:49,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:50:49" (2/3) ... [2018-01-24 19:50:49,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c5dafc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 07:50:49, skipping insertion in model container [2018-01-24 19:50:49,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 07:50:49" (3/3) ... [2018-01-24 19:50:49,650 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cbzero-alloca_true-valid-memsafety_true-termination.i [2018-01-24 19:50:49,657 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 19:50:49,662 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-24 19:50:49,697 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 19:50:49,697 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 19:50:49,698 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 19:50:49,698 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 19:50:49,698 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 19:50:49,698 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 19:50:49,698 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 19:50:49,698 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 19:50:49,699 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 19:50:49,719 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-01-24 19:50:49,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-01-24 19:50:49,725 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:50:49,726 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 19:50:49,727 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-24 19:50:49,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1815231445, now seen corresponding path program 1 times [2018-01-24 19:50:49,733 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:50:49,772 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:50:49,772 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:50:49,772 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:50:49,773 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:50:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:50:49,818 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:50:49,906 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 19:50:49,908 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:50:49,908 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 19:50:49,908 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:50:49,910 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 19:50:49,920 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 19:50:49,921 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 19:50:49,922 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2018-01-24 19:50:50,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:50:50,002 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2018-01-24 19:50:50,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 19:50:50,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-01-24 19:50:50,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:50:50,072 INFO L225 Difference]: With dead ends: 43 [2018-01-24 19:50:50,072 INFO L226 Difference]: Without dead ends: 29 [2018-01-24 19:50:50,075 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 19:50:50,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-01-24 19:50:50,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2018-01-24 19:50:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-01-24 19:50:50,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2018-01-24 19:50:50,104 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2018-01-24 19:50:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:50:50,104 INFO L432 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2018-01-24 19:50:50,105 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 19:50:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2018-01-24 19:50:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-01-24 19:50:50,105 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:50:50,105 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 19:50:50,105 INFO L371 AbstractCegarLoop]: === Iteration 2 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-24 19:50:50,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1815233367, now seen corresponding path program 1 times [2018-01-24 19:50:50,106 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:50:50,106 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:50:50,106 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:50:50,107 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:50:50,107 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:50:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:50:50,118 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:50:50,140 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 19:50:50,141 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:50:50,141 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 19:50:50,141 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:50:50,143 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 19:50:50,143 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 19:50:50,143 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 19:50:50,144 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 3 states. [2018-01-24 19:50:50,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:50:50,172 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-01-24 19:50:50,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 19:50:50,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-01-24 19:50:50,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:50:50,174 INFO L225 Difference]: With dead ends: 29 [2018-01-24 19:50:50,174 INFO L226 Difference]: Without dead ends: 27 [2018-01-24 19:50:50,175 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 19:50:50,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-01-24 19:50:50,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-01-24 19:50:50,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-01-24 19:50:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-01-24 19:50:50,179 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 10 [2018-01-24 19:50:50,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:50:50,180 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-01-24 19:50:50,180 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 19:50:50,180 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-01-24 19:50:50,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 19:50:50,180 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:50:50,181 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 19:50:50,181 INFO L371 AbstractCegarLoop]: === Iteration 3 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-24 19:50:50,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1377281886, now seen corresponding path program 1 times [2018-01-24 19:50:50,181 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:50:50,182 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:50:50,182 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:50:50,182 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:50:50,183 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:50:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:50:50,205 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:50:50,301 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 19:50:50,301 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:50:50,301 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 19:50:50,302 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:50:50,302 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 19:50:50,302 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 19:50:50,302 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 19:50:50,303 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2018-01-24 19:50:50,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:50:50,401 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-01-24 19:50:50,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 19:50:50,401 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-01-24 19:50:50,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:50:50,402 INFO L225 Difference]: With dead ends: 26 [2018-01-24 19:50:50,402 INFO L226 Difference]: Without dead ends: 25 [2018-01-24 19:50:50,403 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-01-24 19:50:50,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-01-24 19:50:50,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-01-24 19:50:50,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-01-24 19:50:50,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-01-24 19:50:50,408 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2018-01-24 19:50:50,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:50:50,408 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-01-24 19:50:50,408 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 19:50:50,409 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-01-24 19:50:50,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 19:50:50,409 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:50:50,409 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 19:50:50,409 INFO L371 AbstractCegarLoop]: === Iteration 4 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-24 19:50:50,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1377281887, now seen corresponding path program 1 times [2018-01-24 19:50:50,410 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:50:50,411 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:50:50,411 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:50:50,411 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:50:50,411 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:50:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:50:50,427 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:50:50,535 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 19:50:50,535 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:50:50,535 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-24 19:50:50,536 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:50:50,536 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 19:50:50,536 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 19:50:50,536 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-01-24 19:50:50,536 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2018-01-24 19:50:50,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:50:50,671 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-01-24 19:50:50,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 19:50:50,672 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2018-01-24 19:50:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:50:50,676 INFO L225 Difference]: With dead ends: 32 [2018-01-24 19:50:50,676 INFO L226 Difference]: Without dead ends: 31 [2018-01-24 19:50:50,676 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-01-24 19:50:50,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-01-24 19:50:50,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-01-24 19:50:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-01-24 19:50:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2018-01-24 19:50:50,682 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 16 [2018-01-24 19:50:50,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:50:50,683 INFO L432 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2018-01-24 19:50:50,683 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 19:50:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2018-01-24 19:50:50,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 19:50:50,684 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:50:50,684 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 19:50:50,684 INFO L371 AbstractCegarLoop]: === Iteration 5 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-24 19:50:50,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1525480681, now seen corresponding path program 1 times [2018-01-24 19:50:50,685 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:50:50,686 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:50:50,686 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:50:50,686 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:50:50,686 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:50:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:50:50,705 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:50:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 19:50:50,821 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 19:50:50,821 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 19:50:50,822 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-01-24 19:50:50,824 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [14], [15], [17], [18], [24], [27], [33], [40], [41], [42], [49], [50], [51], [53] [2018-01-24 19:50:50,870 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 19:50:50,870 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