java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/memsafety/test-memleak_nexttime_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 20:17:19,002 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 20:17:19,003 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 20:17:19,015 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 20:17:19,016 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 20:17:19,017 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 20:17:19,018 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 20:17:19,019 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 20:17:19,021 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 20:17:19,022 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 20:17:19,023 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 20:17:19,023 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 20:17:19,024 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 20:17:19,025 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 20:17:19,026 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 20:17:19,029 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 20:17:19,031 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 20:17:19,033 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 20:17:19,034 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 20:17:19,035 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 20:17:19,037 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-24 20:17:19,042 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 20:17:19,043 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 20:17:19,043 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-24 20:17:19,052 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 20:17:19,052 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 20:17:19,053 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 20:17:19,053 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 20:17:19,054 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 20:17:19,054 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 20:17:19,054 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 20:17:19,054 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 20:17:19,054 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 20:17:19,055 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 20:17:19,055 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 20:17:19,055 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 20:17:19,056 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 20:17:19,056 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 20:17:19,056 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 20:17:19,056 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 20:17:19,056 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 20:17:19,057 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 20:17:19,057 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 20:17:19,057 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 20:17:19,057 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 20:17:19,057 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 20:17:19,058 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 20:17:19,058 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 20:17:19,058 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 20:17:19,058 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:17:19,059 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 20:17:19,059 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 20:17:19,059 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 20:17:19,059 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 20:17:19,059 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 20:17:19,059 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 20:17:19,060 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 20:17:19,060 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 20:17:19,060 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 20:17:19,061 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 20:17:19,061 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 20:17:19,097 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 20:17:19,109 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 20:17:19,114 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 20:17:19,115 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 20:17:19,116 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 20:17:19,116 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/test-memleak_nexttime_true-valid-memsafety_true-termination.i [2018-01-24 20:17:19,291 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 20:17:19,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 20:17:19,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 20:17:19,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 20:17:19,302 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 20:17:19,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:17:19" (1/1) ... [2018-01-24 20:17:19,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eb333df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:19, skipping insertion in model container [2018-01-24 20:17:19,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:17:19" (1/1) ... [2018-01-24 20:17:19,320 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:17:19,363 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:17:19,466 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:17:19,481 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:17:19,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:19 WrapperNode [2018-01-24 20:17:19,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 20:17:19,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 20:17:19,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 20:17:19,493 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 20:17:19,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:19" (1/1) ... [2018-01-24 20:17:19,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:19" (1/1) ... [2018-01-24 20:17:19,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:19" (1/1) ... [2018-01-24 20:17:19,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:19" (1/1) ... [2018-01-24 20:17:19,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:19" (1/1) ... [2018-01-24 20:17:19,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:19" (1/1) ... [2018-01-24 20:17:19,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:19" (1/1) ... [2018-01-24 20:17:19,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 20:17:19,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 20:17:19,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 20:17:19,533 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 20:17:19,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:19" (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 20:17:19,586 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 20:17:19,587 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 20:17:19,587 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-24 20:17:19,587 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 20:17:19,587 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 20:17:19,587 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 20:17:19,587 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 20:17:19,587 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 20:17:19,587 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 20:17:19,587 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 20:17:19,587 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 20:17:19,588 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2018-01-24 20:17:19,588 INFO L136 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2018-01-24 20:17:19,588 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 20:17:19,588 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 20:17:19,588 INFO L128 BoogieDeclarations]: Found specification of procedure memcpy [2018-01-24 20:17:19,588 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-24 20:17:19,588 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 20:17:19,588 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 20:17:19,588 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 20:17:19,715 WARN L455 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-01-24 20:17:19,836 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 20:17:19,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:17:19 BoogieIcfgContainer [2018-01-24 20:17:19,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 20:17:19,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 20:17:19,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 20:17:19,839 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 20:17:19,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 08:17:19" (1/3) ... [2018-01-24 20:17:19,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c250baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:17:19, skipping insertion in model container [2018-01-24 20:17:19,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:19" (2/3) ... [2018-01-24 20:17:19,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c250baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:17:19, skipping insertion in model container [2018-01-24 20:17:19,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:17:19" (3/3) ... [2018-01-24 20:17:19,842 INFO L105 eAbstractionObserver]: Analyzing ICFG test-memleak_nexttime_true-valid-memsafety_true-termination.i [2018-01-24 20:17:19,849 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 20:17:19,855 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 23 error locations. [2018-01-24 20:17:19,898 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 20:17:19,898 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 20:17:19,898 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 20:17:19,898 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 20:17:19,899 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 20:17:19,899 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 20:17:19,899 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 20:17:19,899 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 20:17:19,900 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 20:17:19,920 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2018-01-24 20:17:19,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-01-24 20:17:19,925 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:17:19,926 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-01-24 20:17:19,926 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr3RequiresViolation, ULTIMATE.initErr1RequiresViolation, ULTIMATE.initErr7RequiresViolation, ULTIMATE.initErr2RequiresViolation, ULTIMATE.initErr4RequiresViolation, ULTIMATE.initErr0RequiresViolation, ULTIMATE.initErr6RequiresViolation, ULTIMATE.initErr5RequiresViolation, fooErr1RequiresViolation, fooErr5RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr4RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-01-24 20:17:19,929 INFO L82 PathProgramCache]: Analyzing trace with hash 2931467, now seen corresponding path program 1 times [2018-01-24 20:17:19,931 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:17:19,971 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:19,972 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:17:19,972 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:19,972 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:17:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:17:20,018 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:17:20,079 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 20:17:20,080 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:17:20,081 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 20:17:20,081 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:17:20,083 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 20:17:20,095 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 20:17:20,095 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:17:20,098 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 3 states. [2018-01-24 20:17:20,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:17:20,229 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-01-24 20:17:20,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 20:17:20,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-01-24 20:17:20,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:17:20,239 INFO L225 Difference]: With dead ends: 65 [2018-01-24 20:17:20,240 INFO L226 Difference]: Without dead ends: 57 [2018-01-24 20:17:20,308 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:17:20,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-24 20:17:20,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-01-24 20:17:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-24 20:17:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-01-24 20:17:20,342 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 4 [2018-01-24 20:17:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:17:20,342 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-01-24 20:17:20,342 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 20:17:20,343 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-01-24 20:17:20,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-01-24 20:17:20,343 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:17:20,343 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-01-24 20:17:20,343 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.initErr3RequiresViolation, ULTIMATE.initErr1RequiresViolation, ULTIMATE.initErr7RequiresViolation, ULTIMATE.initErr2RequiresViolation, ULTIMATE.initErr4RequiresViolation, ULTIMATE.initErr0RequiresViolation, ULTIMATE.initErr6RequiresViolation, ULTIMATE.initErr5RequiresViolation, fooErr1RequiresViolation, fooErr5RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr4RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-01-24 20:17:20,343 INFO L82 PathProgramCache]: Analyzing trace with hash 2931468, now seen corresponding path program 1 times [2018-01-24 20:17:20,344 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:17:20,345 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:20,345 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:17:20,345 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:20,345 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:17:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:17:20,361 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:17:20,427 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 20:17:20,427 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:17:20,427 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 20:17:20,428 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:17:20,429 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 20:17:20,429 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 20:17:20,429 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:17:20,430 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 3 states. [2018-01-24 20:17:20,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:17:20,509 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-01-24 20:17:20,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 20:17:20,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-01-24 20:17:20,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:17:20,511 INFO L225 Difference]: With dead ends: 57 [2018-01-24 20:17:20,511 INFO L226 Difference]: Without dead ends: 53 [2018-01-24 20:17:20,512 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:17:20,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-01-24 20:17:20,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-01-24 20:17:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-24 20:17:20,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-01-24 20:17:20,521 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 4 [2018-01-24 20:17:20,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:17:20,521 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-01-24 20:17:20,521 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 20:17:20,522 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-01-24 20:17:20,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 20:17:20,522 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:17:20,522 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:17:20,523 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.initErr3RequiresViolation, ULTIMATE.initErr1RequiresViolation, ULTIMATE.initErr7RequiresViolation, ULTIMATE.initErr2RequiresViolation, ULTIMATE.initErr4RequiresViolation, ULTIMATE.initErr0RequiresViolation, ULTIMATE.initErr6RequiresViolation, ULTIMATE.initErr5RequiresViolation, fooErr1RequiresViolation, fooErr5RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr4RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-01-24 20:17:20,523 INFO L82 PathProgramCache]: Analyzing trace with hash -240006955, now seen corresponding path program 1 times [2018-01-24 20:17:20,523 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:17:20,524 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:20,524 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:17:20,524 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:20,525 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:17:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:17:20,557 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:17:20,626 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 20:17:20,626 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:17:20,626 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 20:17:20,626 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:17:20,627 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 20:17:20,627 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 20:17:20,627 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:17:20,627 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 3 states. [2018-01-24 20:17:20,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:17:20,689 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-01-24 20:17:20,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 20:17:20,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-01-24 20:17:20,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:17:20,691 INFO L225 Difference]: With dead ends: 53 [2018-01-24 20:17:20,691 INFO L226 Difference]: Without dead ends: 51 [2018-01-24 20:17:20,692 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:17:20,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-24 20:17:20,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-01-24 20:17:20,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-01-24 20:17:20,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-01-24 20:17:20,700 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 14 [2018-01-24 20:17:20,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:17:20,700 INFO L432 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-01-24 20:17:20,700 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 20:17:20,700 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-01-24 20:17:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 20:17:20,701 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:17:20,701 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:17:20,701 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.initErr3RequiresViolation, ULTIMATE.initErr1RequiresViolation, ULTIMATE.initErr7RequiresViolation, ULTIMATE.initErr2RequiresViolation, ULTIMATE.initErr4RequiresViolation, ULTIMATE.initErr0RequiresViolation, ULTIMATE.initErr6RequiresViolation, ULTIMATE.initErr5RequiresViolation, fooErr1RequiresViolation, fooErr5RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr4RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-01-24 20:17:20,702 INFO L82 PathProgramCache]: Analyzing trace with hash -240006954, now seen corresponding path program 1 times [2018-01-24 20:17:20,702 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:17:20,703 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:20,703 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:17:20,703 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:20,704 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:17:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:17:20,731 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:17:20,788 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 20:17:20,789 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:17:20,789 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:17:20,789 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:17:20,789 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:17:20,789 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:17:20,789 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:17:20,789 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 4 states. [2018-01-24 20:17:20,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:17:20,864 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-01-24 20:17:20,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:17:20,865 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-01-24 20:17:20,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:17:20,866 INFO L225 Difference]: With dead ends: 51 [2018-01-24 20:17:20,866 INFO L226 Difference]: Without dead ends: 49 [2018-01-24 20:17:20,867 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:17:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-24 20:17:20,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-01-24 20:17:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-24 20:17:20,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-01-24 20:17:20,873 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 14 [2018-01-24 20:17:20,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:17:20,874 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-01-24 20:17:20,874 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:17:20,874 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-01-24 20:17:20,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 20:17:20,875 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:17:20,875 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:17:20,875 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.initErr3RequiresViolation, ULTIMATE.initErr1RequiresViolation, ULTIMATE.initErr7RequiresViolation, ULTIMATE.initErr2RequiresViolation, ULTIMATE.initErr4RequiresViolation, ULTIMATE.initErr0RequiresViolation, ULTIMATE.initErr6RequiresViolation, ULTIMATE.initErr5RequiresViolation, fooErr1RequiresViolation, fooErr5RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr4RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-01-24 20:17:20,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1149718964, now seen corresponding path program 1 times [2018-01-24 20:17:20,875 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:17:20,876 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:20,876 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:17:20,877 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:20,877 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:17:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:17:20,901 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:17:21,114 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 20:17:21,114 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:17:21,115 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-24 20:17:21,115 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:17:21,115 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 20:17:21,115 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 20:17:21,115 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:17:21,116 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 8 states. [2018-01-24 20:17:21,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:17:21,261 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-01-24 20:17:21,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:17:21,262 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-01-24 20:17:21,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:17:21,263 INFO L225 Difference]: With dead ends: 49 [2018-01-24 20:17:21,263 INFO L226 Difference]: Without dead ends: 46 [2018-01-24 20:17:21,263 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-01-24 20:17:21,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-24 20:17:21,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-01-24 20:17:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-01-24 20:17:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-01-24 20:17:21,269 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 15 [2018-01-24 20:17:21,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:17:21,269 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-01-24 20:17:21,269 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 20:17:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-01-24 20:17:21,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-24 20:17:21,270 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:17:21,270 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:17:21,270 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.initErr3RequiresViolation, ULTIMATE.initErr1RequiresViolation, ULTIMATE.initErr7RequiresViolation, ULTIMATE.initErr2RequiresViolation, ULTIMATE.initErr4RequiresViolation, ULTIMATE.initErr0RequiresViolation, ULTIMATE.initErr6RequiresViolation, ULTIMATE.initErr5RequiresViolation, fooErr1RequiresViolation, fooErr5RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr4RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-01-24 20:17:21,270 INFO L82 PathProgramCache]: Analyzing trace with hash 536104684, now seen corresponding path program 1 times [2018-01-24 20:17:21,270 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:17:21,271 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:21,271 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:17:21,271 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:21,271 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:17:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:17:21,293 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:17:21,339 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 20:17:21,339 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:17:21,339 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 20:17:21,339 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:17:21,340 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 20:17:21,340 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 20:17:21,340 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:17:21,340 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 3 states. [2018-01-24 20:17:21,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:17:21,375 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-01-24 20:17:21,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 20:17:21,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2018-01-24 20:17:21,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:17:21,376 INFO L225 Difference]: With dead ends: 46 [2018-01-24 20:17:21,376 INFO L226 Difference]: Without dead ends: 44 [2018-01-24 20:17:21,376 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:17:21,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-01-24 20:17:21,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-01-24 20:17:21,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-24 20:17:21,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-01-24 20:17:21,381 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 27 [2018-01-24 20:17:21,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:17:21,381 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-01-24 20:17:21,381 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 20:17:21,381 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-01-24 20:17:21,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-24 20:17:21,382 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:17:21,382 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:17:21,382 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.initErr3RequiresViolation, ULTIMATE.initErr1RequiresViolation, ULTIMATE.initErr7RequiresViolation, ULTIMATE.initErr2RequiresViolation, ULTIMATE.initErr4RequiresViolation, ULTIMATE.initErr0RequiresViolation, ULTIMATE.initErr6RequiresViolation, ULTIMATE.initErr5RequiresViolation, fooErr1RequiresViolation, fooErr5RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr4RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-01-24 20:17:21,382 INFO L82 PathProgramCache]: Analyzing trace with hash 536104686, now seen corresponding path program 1 times [2018-01-24 20:17:21,382 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:17:21,383 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:21,383 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:17:21,383 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:21,383 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:17:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:17:21,403 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:17:21,438 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 20:17:21,438 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:17:21,439 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:17:21,439 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:17:21,439 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:17:21,440 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:17:21,440 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:17:21,440 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 4 states. [2018-01-24 20:17:21,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:17:21,472 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2018-01-24 20:17:21,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:17:21,473 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2018-01-24 20:17:21,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:17:21,474 INFO L225 Difference]: With dead ends: 74 [2018-01-24 20:17:21,474 INFO L226 Difference]: Without dead ends: 46 [2018-01-24 20:17:21,474 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:17:21,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-24 20:17:21,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-01-24 20:17:21,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-01-24 20:17:21,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-01-24 20:17:21,480 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 27 [2018-01-24 20:17:21,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:17:21,481 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-01-24 20:17:21,481 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:17:21,481 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-01-24 20:17:21,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 20:17:21,482 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:17:21,482 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:17:21,482 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.initErr3RequiresViolation, ULTIMATE.initErr1RequiresViolation, ULTIMATE.initErr7RequiresViolation, ULTIMATE.initErr2RequiresViolation, ULTIMATE.initErr4RequiresViolation, ULTIMATE.initErr0RequiresViolation, ULTIMATE.initErr6RequiresViolation, ULTIMATE.initErr5RequiresViolation, fooErr1RequiresViolation, fooErr5RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr4RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-01-24 20:17:21,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1523422321, now seen corresponding path program 1 times [2018-01-24 20:17:21,483 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:17:21,484 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:21,484 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:17:21,484 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:21,484 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:17:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:17:21,505 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:17:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:17:21,612 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:17:21,612 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 20:17:21,613 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-01-24 20:17:21,616 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [10], [11], [12], [13], [14], [15], [19], [21], [22], [24], [28], [42], [43], [44], [47], [50], [53], [56], [60], [61], [62], [63], [66], [67], [68] [2018-01-24 20:17:21,662 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 20:17:21,662 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