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_cbzero-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-25 02:39:32,488 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-25 02:39:32,490 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-25 02:39:32,505 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-25 02:39:32,505 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-25 02:39:32,506 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-25 02:39:32,507 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-25 02:39:32,509 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-25 02:39:32,511 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-25 02:39:32,512 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-25 02:39:32,513 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-25 02:39:32,513 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-25 02:39:32,514 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-25 02:39:32,516 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-25 02:39:32,517 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-25 02:39:32,519 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-25 02:39:32,521 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-25 02:39:32,523 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-25 02:39:32,525 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-25 02:39:32,526 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-25 02:39:32,529 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-25 02:39:32,529 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-25 02:39:32,529 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-25 02:39:32,530 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-25 02:39:32,531 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-25 02:39:32,532 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-25 02:39:32,533 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-25 02:39:32,533 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-25 02:39:32,534 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-25 02:39:32,534 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-25 02:39:32,535 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-25 02:39:32,535 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 02:39:32,543 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-25 02:39:32,543 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-25 02:39:32,544 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-25 02:39:32,544 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-25 02:39:32,544 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-25 02:39:32,545 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-25 02:39:32,545 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-25 02:39:32,545 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-25 02:39:32,545 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-25 02:39:32,545 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-25 02:39:32,545 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-25 02:39:32,545 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-25 02:39:32,546 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-25 02:39:32,546 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-25 02:39:32,546 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-25 02:39:32,546 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-25 02:39:32,546 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-25 02:39:32,546 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-25 02:39:32,546 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-25 02:39:32,547 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-25 02:39:32,547 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-25 02:39:32,547 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-25 02:39:32,547 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-25 02:39:32,547 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-25 02:39:32,548 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-25 02:39:32,548 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 02:39:32,548 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-25 02:39:32,548 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-25 02:39:32,548 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-25 02:39:32,548 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-25 02:39:32,548 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-25 02:39:32,549 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-25 02:39:32,549 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-25 02:39:32,549 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-25 02:39:32,549 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-25 02:39:32,550 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-25 02:39:32,550 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-25 02:39:32,583 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-25 02:39:32,593 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-25 02:39:32,596 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-25 02:39:32,597 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-25 02:39:32,597 INFO L276 PluginConnector]: CDTParser initialized [2018-01-25 02:39:32,598 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cbzero-alloca_true-valid-memsafety_true-termination.i [2018-01-25 02:39:32,833 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-25 02:39:32,842 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-25 02:39:32,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-25 02:39:32,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-25 02:39:32,851 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-25 02:39:32,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 02:39:32" (1/1) ... [2018-01-25 02:39:32,855 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 25.01 02:39:32, skipping insertion in model container [2018-01-25 02:39:32,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 02:39:32" (1/1) ... [2018-01-25 02:39:32,880 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 02:39:32,946 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 02:39:33,085 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 02:39:33,101 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 02:39:33,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:39:33 WrapperNode [2018-01-25 02:39:33,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-25 02:39:33,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-25 02:39:33,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-25 02:39:33,110 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-25 02:39:33,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:39:33" (1/1) ... [2018-01-25 02:39:33,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:39:33" (1/1) ... [2018-01-25 02:39:33,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:39:33" (1/1) ... [2018-01-25 02:39:33,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:39:33" (1/1) ... [2018-01-25 02:39:33,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:39:33" (1/1) ... [2018-01-25 02:39:33,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:39:33" (1/1) ... [2018-01-25 02:39:33,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:39:33" (1/1) ... [2018-01-25 02:39:33,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-25 02:39:33,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-25 02:39:33,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-25 02:39:33,142 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-25 02:39:33,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:39:33" (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 02:39:33,202 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-25 02:39:33,202 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-25 02:39:33,203 INFO L136 BoogieDeclarations]: Found implementation of procedure cbzero [2018-01-25 02:39:33,203 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-25 02:39:33,203 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-25 02:39:33,203 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-25 02:39:33,203 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-25 02:39:33,203 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-25 02:39:33,203 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-25 02:39:33,203 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-25 02:39:33,203 INFO L128 BoogieDeclarations]: Found specification of procedure cbzero [2018-01-25 02:39:33,203 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-25 02:39:33,204 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-25 02:39:33,204 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-25 02:39:33,353 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-25 02:39:33,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 02:39:33 BoogieIcfgContainer [2018-01-25 02:39:33,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-25 02:39:33,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-25 02:39:33,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-25 02:39:33,356 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-25 02:39:33,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.01 02:39:32" (1/3) ... [2018-01-25 02:39:33,357 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 25.01 02:39:33, skipping insertion in model container [2018-01-25 02:39:33,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:39:33" (2/3) ... [2018-01-25 02:39:33,357 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 25.01 02:39:33, skipping insertion in model container [2018-01-25 02:39:33,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 02:39:33" (3/3) ... [2018-01-25 02:39:33,359 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cbzero-alloca_true-valid-memsafety_true-termination.i [2018-01-25 02:39:33,366 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-25 02:39:33,371 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-25 02:39:33,410 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-25 02:39:33,410 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-25 02:39:33,410 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-25 02:39:33,411 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-25 02:39:33,411 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-25 02:39:33,411 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-25 02:39:33,411 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-25 02:39:33,411 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-25 02:39:33,412 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-25 02:39:33,433 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-01-25 02:39:33,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-01-25 02:39:33,440 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:39:33,441 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:39:33,441 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-25 02:39:33,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1815231445, now seen corresponding path program 1 times [2018-01-25 02:39:33,450 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:39:33,496 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:39:33,496 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:39:33,497 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:39:33,497 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:39:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:39:33,547 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:39:33,615 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 02:39:33,617 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:39:33,618 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 02:39:33,618 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:39:33,621 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 02:39:33,637 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 02:39:33,638 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 02:39:33,640 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2018-01-25 02:39:33,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:39:33,722 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2018-01-25 02:39:33,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 02:39:33,724 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-01-25 02:39:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:39:33,733 INFO L225 Difference]: With dead ends: 43 [2018-01-25 02:39:33,733 INFO L226 Difference]: Without dead ends: 29 [2018-01-25 02:39:33,800 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 [2018-01-25 02:39:33,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-01-25 02:39:33,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2018-01-25 02:39:33,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-01-25 02:39:33,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2018-01-25 02:39:33,831 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2018-01-25 02:39:33,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:39:33,831 INFO L432 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2018-01-25 02:39:33,831 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 02:39:33,831 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2018-01-25 02:39:33,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-01-25 02:39:33,832 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:39:33,832 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:39:33,832 INFO L371 AbstractCegarLoop]: === Iteration 2 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-25 02:39:33,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1815233367, now seen corresponding path program 1 times [2018-01-25 02:39:33,832 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:39:33,833 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:39:33,833 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:39:33,833 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:39:33,833 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:39:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:39:33,845 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:39:33,875 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 02:39:33,876 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:39:33,876 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-25 02:39:33,876 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:39:33,878 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-25 02:39:33,878 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-25 02:39:33,878 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-25 02:39:33,879 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 3 states. [2018-01-25 02:39:33,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:39:33,926 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-01-25 02:39:33,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-25 02:39:33,926 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-01-25 02:39:33,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:39:33,927 INFO L225 Difference]: With dead ends: 29 [2018-01-25 02:39:33,927 INFO L226 Difference]: Without dead ends: 27 [2018-01-25 02:39:33,928 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 02:39:33,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-01-25 02:39:33,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-01-25 02:39:33,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-01-25 02:39:33,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-01-25 02:39:33,933 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 10 [2018-01-25 02:39:33,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:39:33,933 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-01-25 02:39:33,933 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-25 02:39:33,934 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-01-25 02:39:33,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-25 02:39:33,934 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:39:33,934 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:39:33,934 INFO L371 AbstractCegarLoop]: === Iteration 3 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-25 02:39:33,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1377281886, now seen corresponding path program 1 times [2018-01-25 02:39:33,935 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:39:33,936 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:39:33,936 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:39:33,936 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:39:33,936 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:39:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:39:33,959 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:39:34,085 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 02:39:34,086 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:39:34,086 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-25 02:39:34,086 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:39:34,087 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-25 02:39:34,087 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-25 02:39:34,087 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-25 02:39:34,087 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2018-01-25 02:39:34,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:39:34,194 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-01-25 02:39:34,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 02:39:34,194 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-01-25 02:39:34,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:39:34,195 INFO L225 Difference]: With dead ends: 26 [2018-01-25 02:39:34,195 INFO L226 Difference]: Without dead ends: 25 [2018-01-25 02:39:34,196 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-01-25 02:39:34,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-01-25 02:39:34,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-01-25 02:39:34,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-01-25 02:39:34,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-01-25 02:39:34,202 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2018-01-25 02:39:34,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:39:34,202 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-01-25 02:39:34,202 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-25 02:39:34,202 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-01-25 02:39:34,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-25 02:39:34,203 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:39:34,203 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:39:34,203 INFO L371 AbstractCegarLoop]: === Iteration 4 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-25 02:39:34,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1377281887, now seen corresponding path program 1 times [2018-01-25 02:39:34,204 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:39:34,205 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:39:34,205 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:39:34,205 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:39:34,205 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:39:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:39:34,234 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:39:34,392 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 02:39:34,398 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:39:34,398 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-25 02:39:34,399 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:39:34,399 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-25 02:39:34,399 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-25 02:39:34,399 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-01-25 02:39:34,399 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2018-01-25 02:39:34,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:39:34,657 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-01-25 02:39:34,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-25 02:39:34,658 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2018-01-25 02:39:34,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:39:34,664 INFO L225 Difference]: With dead ends: 32 [2018-01-25 02:39:34,664 INFO L226 Difference]: Without dead ends: 31 [2018-01-25 02:39:34,664 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 [2018-01-25 02:39:34,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-01-25 02:39:34,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-01-25 02:39:34,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-01-25 02:39:34,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2018-01-25 02:39:34,682 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 16 [2018-01-25 02:39:34,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:39:34,683 INFO L432 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2018-01-25 02:39:34,683 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-25 02:39:34,683 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2018-01-25 02:39:34,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-25 02:39:34,684 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:39:34,684 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:39:34,684 INFO L371 AbstractCegarLoop]: === Iteration 5 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-25 02:39:34,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1525480681, now seen corresponding path program 1 times [2018-01-25 02:39:34,685 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:39:34,686 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:39:34,686 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:39:34,686 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:39:34,686 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:39:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:39:34,708 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:39:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:39:34,861 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-25 02:39:34,861 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-25 02:39:34,862 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-01-25 02:39:34,865 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [14], [15], [17], [18], [24], [27], [33], [40], [41], [42], [49], [50], [51], [53] [2018-01-25 02:39:34,933 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-25 02:39:34,934 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