java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrpbrk-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 23:22:00,335 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 23:22:00,337 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 23:22:00,351 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 23:22:00,352 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 23:22:00,353 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 23:22:00,354 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 23:22:00,356 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 23:22:00,358 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 23:22:00,359 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 23:22:00,360 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 23:22:00,360 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 23:22:00,361 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 23:22:00,362 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 23:22:00,363 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 23:22:00,366 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 23:22:00,368 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 23:22:00,370 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 23:22:00,372 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 23:22:00,373 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 23:22:00,375 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-24 23:22:00,380 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 23:22:00,381 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 23:22:00,381 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf [2018-01-24 23:22:00,392 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 23:22:00,392 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 23:22:00,393 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 23:22:00,393 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 23:22:00,393 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 23:22:00,394 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 23:22:00,394 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 23:22:00,394 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 23:22:00,395 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 23:22:00,395 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 23:22:00,395 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 23:22:00,395 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 23:22:00,395 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 23:22:00,396 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 23:22:00,396 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 23:22:00,396 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 23:22:00,396 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 23:22:00,396 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 23:22:00,397 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 23:22:00,397 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 23:22:00,397 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 23:22:00,397 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 23:22:00,397 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 23:22:00,398 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 23:22:00,398 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:22:00,398 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 23:22:00,398 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 23:22:00,398 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 23:22:00,399 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 23:22:00,399 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 23:22:00,399 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 23:22:00,399 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 23:22:00,399 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 23:22:00,399 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 23:22:00,400 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 23:22:00,401 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 23:22:00,435 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 23:22:00,448 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 23:22:00,452 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 23:22:00,454 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 23:22:00,454 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 23:22:00,455 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrpbrk-alloca_true-valid-memsafety_true-termination.i [2018-01-24 23:22:00,619 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 23:22:00,626 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 23:22:00,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 23:22:00,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 23:22:00,632 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 23:22:00,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:22:00" (1/1) ... [2018-01-24 23:22:00,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@647aa831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:22:00, skipping insertion in model container [2018-01-24 23:22:00,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:22:00" (1/1) ... [2018-01-24 23:22:00,652 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:22:00,692 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:22:00,808 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:22:00,823 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:22:00,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:22:00 WrapperNode [2018-01-24 23:22:00,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 23:22:00,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 23:22:00,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 23:22:00,831 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 23:22:00,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:22:00" (1/1) ... [2018-01-24 23:22:00,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:22:00" (1/1) ... [2018-01-24 23:22:00,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:22:00" (1/1) ... [2018-01-24 23:22:00,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:22:00" (1/1) ... [2018-01-24 23:22:00,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:22:00" (1/1) ... [2018-01-24 23:22:00,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:22:00" (1/1) ... [2018-01-24 23:22:00,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:22:00" (1/1) ... [2018-01-24 23:22:00,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 23:22:00,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 23:22:00,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 23:22:00,861 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 23:22:00,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:22:00" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:22:00,911 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 23:22:00,911 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 23:22:00,911 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrpbrk [2018-01-24 23:22:00,911 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 23:22:00,911 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 23:22:00,911 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 23:22:00,911 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 23:22:00,912 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 23:22:00,912 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 23:22:00,912 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 23:22:00,912 INFO L128 BoogieDeclarations]: Found specification of procedure cstrpbrk [2018-01-24 23:22:00,912 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 23:22:00,912 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 23:22:00,912 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 23:22:01,093 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 23:22:01,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:22:01 BoogieIcfgContainer [2018-01-24 23:22:01,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 23:22:01,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 23:22:01,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 23:22:01,097 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 23:22:01,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:22:00" (1/3) ... [2018-01-24 23:22:01,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13875f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:22:01, skipping insertion in model container [2018-01-24 23:22:01,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:22:00" (2/3) ... [2018-01-24 23:22:01,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13875f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:22:01, skipping insertion in model container [2018-01-24 23:22:01,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:22:01" (3/3) ... [2018-01-24 23:22:01,100 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca_true-valid-memsafety_true-termination.i [2018-01-24 23:22:01,107 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 23:22:01,113 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-01-24 23:22:01,157 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 23:22:01,157 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 23:22:01,157 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 23:22:01,157 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 23:22:01,157 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 23:22:01,157 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 23:22:01,157 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 23:22:01,157 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 23:22:01,158 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 23:22:01,171 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-24 23:22:01,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 23:22:01,178 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:22:01,179 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:22:01,180 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrpbrkErr3RequiresViolation, cstrpbrkErr1RequiresViolation, cstrpbrkErr2RequiresViolation, cstrpbrkErr0RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:22:01,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1526501255, now seen corresponding path program 1 times [2018-01-24 23:22:01,188 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:22:01,229 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:01,229 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:22:01,229 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:01,229 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:22:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:22:01,286 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:22:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:22:01,448 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:22:01,448 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:22:01,448 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:22:01,450 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:22:01,461 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:22:01,461 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:22:01,463 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 4 states. [2018-01-24 23:22:01,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:22:01,661 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2018-01-24 23:22:01,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:22:01,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 23:22:01,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:22:01,670 INFO L225 Difference]: With dead ends: 74 [2018-01-24 23:22:01,670 INFO L226 Difference]: Without dead ends: 43 [2018-01-24 23:22:01,674 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:22:01,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-24 23:22:01,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-24 23:22:01,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-24 23:22:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2018-01-24 23:22:01,706 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 13 [2018-01-24 23:22:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:22:01,707 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2018-01-24 23:22:01,707 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:22:01,707 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2018-01-24 23:22:01,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 23:22:01,707 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:22:01,708 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:22:01,708 INFO L371 AbstractCegarLoop]: === Iteration 2 === [cstrpbrkErr3RequiresViolation, cstrpbrkErr1RequiresViolation, cstrpbrkErr2RequiresViolation, cstrpbrkErr0RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:22:01,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1526501254, now seen corresponding path program 1 times [2018-01-24 23:22:01,708 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:22:01,709 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:01,709 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:22:01,709 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:01,709 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:22:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:22:01,729 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:22:01,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:22:01,869 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:22:01,869 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:22:01,869 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:22:01,871 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:22:01,871 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:22:01,872 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:22:01,872 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 6 states. [2018-01-24 23:22:01,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:22:01,955 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2018-01-24 23:22:01,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:22:01,956 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-01-24 23:22:01,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:22:01,957 INFO L225 Difference]: With dead ends: 43 [2018-01-24 23:22:01,957 INFO L226 Difference]: Without dead ends: 42 [2018-01-24 23:22:01,958 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:22:01,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-01-24 23:22:01,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-01-24 23:22:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-24 23:22:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2018-01-24 23:22:01,966 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 13 [2018-01-24 23:22:01,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:22:01,967 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2018-01-24 23:22:01,967 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:22:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2018-01-24 23:22:01,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 23:22:01,968 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:22:01,968 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:22:01,968 INFO L371 AbstractCegarLoop]: === Iteration 3 === [cstrpbrkErr3RequiresViolation, cstrpbrkErr1RequiresViolation, cstrpbrkErr2RequiresViolation, cstrpbrkErr0RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:22:01,968 INFO L82 PathProgramCache]: Analyzing trace with hash -76898612, now seen corresponding path program 1 times [2018-01-24 23:22:01,968 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:22:01,970 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:01,970 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:22:01,970 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:01,970 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:22:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:22:01,984 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:22:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:22:02,044 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:22:02,044 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:22:02,044 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:22:02,044 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:22:02,044 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:22:02,045 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:22:02,045 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 4 states. [2018-01-24 23:22:02,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:22:02,108 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-01-24 23:22:02,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:22:02,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-01-24 23:22:02,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:22:02,109 INFO L225 Difference]: With dead ends: 42 [2018-01-24 23:22:02,109 INFO L226 Difference]: Without dead ends: 41 [2018-01-24 23:22:02,110 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:22:02,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-24 23:22:02,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-24 23:22:02,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-24 23:22:02,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2018-01-24 23:22:02,114 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 14 [2018-01-24 23:22:02,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:22:02,115 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2018-01-24 23:22:02,115 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:22:02,115 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2018-01-24 23:22:02,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 23:22:02,115 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:22:02,115 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:22:02,116 INFO L371 AbstractCegarLoop]: === Iteration 4 === [cstrpbrkErr3RequiresViolation, cstrpbrkErr1RequiresViolation, cstrpbrkErr2RequiresViolation, cstrpbrkErr0RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:22:02,116 INFO L82 PathProgramCache]: Analyzing trace with hash -76898611, now seen corresponding path program 1 times [2018-01-24 23:22:02,116 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:22:02,116 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:02,117 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:22:02,117 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:02,117 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:22:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:22:02,128 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:22:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:22:02,193 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:22:02,212 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:22:02,212 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:22:02,213 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:22:02,213 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:22:02,213 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:22:02,213 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 5 states. [2018-01-24 23:22:02,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:22:02,256 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2018-01-24 23:22:02,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:22:02,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-01-24 23:22:02,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:22:02,257 INFO L225 Difference]: With dead ends: 41 [2018-01-24 23:22:02,257 INFO L226 Difference]: Without dead ends: 40 [2018-01-24 23:22:02,258 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 [2018-01-24 23:22:02,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-24 23:22:02,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-01-24 23:22:02,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-24 23:22:02,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-01-24 23:22:02,263 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 14 [2018-01-24 23:22:02,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:22:02,264 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-01-24 23:22:02,264 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:22:02,264 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-01-24 23:22:02,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 23:22:02,264 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:22:02,264 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:22:02,265 INFO L371 AbstractCegarLoop]: === Iteration 5 === [cstrpbrkErr3RequiresViolation, cstrpbrkErr1RequiresViolation, cstrpbrkErr2RequiresViolation, cstrpbrkErr0RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:22:02,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1821085779, now seen corresponding path program 1 times [2018-01-24 23:22:02,265 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:22:02,266 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:02,266 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:22:02,266 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:02,266 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:22:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:22:02,280 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:22:02,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:22:02,319 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:22:02,319 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:22:02,319 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:22:02,319 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:22:02,319 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:22:02,319 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:22:02,320 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2018-01-24 23:22:02,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:22:02,415 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-01-24 23:22:02,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:22:02,416 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-01-24 23:22:02,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:22:02,417 INFO L225 Difference]: With dead ends: 40 [2018-01-24 23:22:02,417 INFO L226 Difference]: Without dead ends: 39 [2018-01-24 23:22:02,418 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:22:02,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-24 23:22:02,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-24 23:22:02,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-24 23:22:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2018-01-24 23:22:02,424 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 19 [2018-01-24 23:22:02,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:22:02,424 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2018-01-24 23:22:02,424 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:22:02,425 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2018-01-24 23:22:02,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 23:22:02,425 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:22:02,426 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:22:02,426 INFO L371 AbstractCegarLoop]: === Iteration 6 === [cstrpbrkErr3RequiresViolation, cstrpbrkErr1RequiresViolation, cstrpbrkErr2RequiresViolation, cstrpbrkErr0RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:22:02,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1821085778, now seen corresponding path program 1 times [2018-01-24 23:22:02,426 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:22:02,427 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:02,427 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:22:02,428 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:02,428 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:22:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:22:02,442 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:22:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:22:02,549 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:22:02,549 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 23:22:02,549 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:22:02,550 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 23:22:02,550 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 23:22:02,551 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-01-24 23:22:02,551 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2018-01-24 23:22:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:22:02,675 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-01-24 23:22:02,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-24 23:22:02,675 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-01-24 23:22:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:22:02,676 INFO L225 Difference]: With dead ends: 45 [2018-01-24 23:22:02,676 INFO L226 Difference]: Without dead ends: 44 [2018-01-24 23:22:02,676 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-01-24 23:22:02,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-01-24 23:22:02,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2018-01-24 23:22:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-24 23:22:02,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2018-01-24 23:22:02,680 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 19 [2018-01-24 23:22:02,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:22:02,680 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2018-01-24 23:22:02,680 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 23:22:02,680 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2018-01-24 23:22:02,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 23:22:02,681 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:22:02,681 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:22:02,681 INFO L371 AbstractCegarLoop]: === Iteration 7 === [cstrpbrkErr3RequiresViolation, cstrpbrkErr1RequiresViolation, cstrpbrkErr2RequiresViolation, cstrpbrkErr0RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:22:02,681 INFO L82 PathProgramCache]: Analyzing trace with hash -551391085, now seen corresponding path program 1 times [2018-01-24 23:22:02,681 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:22:02,682 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:02,682 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:22:02,682 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:02,682 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:22:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:22:02,695 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:22:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:22:02,741 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:22:02,741 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:22:02,741 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:22:02,741 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 23:22:02,742 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 23:22:02,742 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:22:02,742 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 7 states. [2018-01-24 23:22:02,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:22:02,846 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2018-01-24 23:22:02,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 23:22:02,847 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-01-24 23:22:02,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:22:02,850 INFO L225 Difference]: With dead ends: 47 [2018-01-24 23:22:02,850 INFO L226 Difference]: Without dead ends: 46 [2018-01-24 23:22:02,851 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-01-24 23:22:02,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-24 23:22:02,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2018-01-24 23:22:02,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-24 23:22:02,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2018-01-24 23:22:02,856 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 23 [2018-01-24 23:22:02,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:22:02,856 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2018-01-24 23:22:02,856 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 23:22:02,856 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2018-01-24 23:22:02,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 23:22:02,857 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:22:02,857 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:22:02,857 INFO L371 AbstractCegarLoop]: === Iteration 8 === [cstrpbrkErr3RequiresViolation, cstrpbrkErr1RequiresViolation, cstrpbrkErr2RequiresViolation, cstrpbrkErr0RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:22:02,857 INFO L82 PathProgramCache]: Analyzing trace with hash -551391084, now seen corresponding path program 1 times [2018-01-24 23:22:02,857 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:22:02,858 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:02,858 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:22:02,858 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:02,858 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:22:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:22:02,869 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:22:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:22:03,027 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:22:03,027 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-01-24 23:22:03,027 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:22:03,027 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-24 23:22:03,027 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-24 23:22:03,027 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-01-24 23:22:03,028 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 10 states. [2018-01-24 23:22:03,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:22:03,147 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2018-01-24 23:22:03,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-24 23:22:03,147 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2018-01-24 23:22:03,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:22:03,148 INFO L225 Difference]: With dead ends: 46 [2018-01-24 23:22:03,148 INFO L226 Difference]: Without dead ends: 45 [2018-01-24 23:22:03,149 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2018-01-24 23:22:03,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-24 23:22:03,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2018-01-24 23:22:03,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-24 23:22:03,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2018-01-24 23:22:03,154 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 23 [2018-01-24 23:22:03,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:22:03,155 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2018-01-24 23:22:03,155 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-24 23:22:03,155 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2018-01-24 23:22:03,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 23:22:03,156 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:22:03,156 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:22:03,156 INFO L371 AbstractCegarLoop]: === Iteration 9 === [cstrpbrkErr3RequiresViolation, cstrpbrkErr1RequiresViolation, cstrpbrkErr2RequiresViolation, cstrpbrkErr0RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:22:03,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1601452084, now seen corresponding path program 1 times [2018-01-24 23:22:03,157 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:22:03,158 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:03,158 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:22:03,158 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:03,158 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:22:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:22:03,177 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:22:03,454 WARN L146 SmtUtils]: Spent 104ms on a formula simplification. DAG size of input: 23 DAG size of output 12 [2018-01-24 23:22:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:22:03,603 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:22:03,603 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2018-01-24 23:22:03,603 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:22:03,603 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-24 23:22:03,603 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-24 23:22:03,603 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-01-24 23:22:03,604 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 13 states. [2018-01-24 23:22:03,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:22:03,876 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2018-01-24 23:22:03,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-24 23:22:03,877 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2018-01-24 23:22:03,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:22:03,878 INFO L225 Difference]: With dead ends: 93 [2018-01-24 23:22:03,878 INFO L226 Difference]: Without dead ends: 69 [2018-01-24 23:22:03,879 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2018-01-24 23:22:03,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-24 23:22:03,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2018-01-24 23:22:03,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-24 23:22:03,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2018-01-24 23:22:03,887 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 28 [2018-01-24 23:22:03,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:22:03,887 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2018-01-24 23:22:03,887 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-24 23:22:03,887 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2018-01-24 23:22:03,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 23:22:03,888 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:22:03,888 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:22:03,889 INFO L371 AbstractCegarLoop]: === Iteration 10 === [cstrpbrkErr3RequiresViolation, cstrpbrkErr1RequiresViolation, cstrpbrkErr2RequiresViolation, cstrpbrkErr0RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:22:03,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1820306802, now seen corresponding path program 1 times [2018-01-24 23:22:03,889 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:22:03,890 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:03,890 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:22:03,890 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:22:03,890 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:22:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:22:03,905 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:22:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:22:04,186 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:22:04,186 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 23:22:04,187 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-01-24 23:22:04,188 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [6], [8], [9], [11], [12], [17], [21], [22], [25], [28], [47], [52], [56], [60], [61], [62], [63], [64], [67], [78], [79], [80], [82] [2018-01-24 23:22:04,232 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 23:22:04,233 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