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/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf -i ../../../trunk/examples/svcomp/memsafety/test-0102_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 08:23:25,877 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 08:23:25,879 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 08:23:25,894 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 08:23:25,895 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 08:23:25,896 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 08:23:25,897 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 08:23:25,898 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 08:23:25,901 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 08:23:25,901 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 08:23:25,902 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 08:23:25,903 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 08:23:25,904 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 08:23:25,905 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 08:23:25,906 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 08:23:25,908 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 08:23:25,910 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 08:23:25,912 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 08:23:25,914 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 08:23:25,915 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 08:23:25,917 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 08:23:25,922 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 08:23:25,922 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 08:23:25,923 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf [2018-01-21 08:23:25,931 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 08:23:25,931 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 08:23:25,932 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 08:23:25,932 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 08:23:25,932 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 08:23:25,932 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 08:23:25,932 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 08:23:25,932 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 08:23:25,933 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 08:23:25,933 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 08:23:25,933 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 08:23:25,933 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 08:23:25,934 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 08:23:25,934 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 08:23:25,934 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 08:23:25,934 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 08:23:25,934 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 08:23:25,934 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 08:23:25,934 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 08:23:25,935 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 08:23:25,935 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 08:23:25,935 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 08:23:25,935 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 08:23:25,935 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 08:23:25,935 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 08:23:25,936 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 08:23:25,936 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 08:23:25,936 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:23:25,936 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 08:23:25,936 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 08:23:25,936 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 08:23:25,936 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 08:23:25,937 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 08:23:25,937 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 08:23:25,937 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 08:23:25,937 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 08:23:25,937 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 08:23:25,937 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 08:23:25,938 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 08:23:25,938 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 08:23:25,969 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 08:23:25,979 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 08:23:25,983 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 08:23:25,984 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 08:23:25,984 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 08:23:25,985 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/test-0102_true-valid-memsafety.i [2018-01-21 08:23:26,149 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 08:23:26,153 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 08:23:26,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 08:23:26,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 08:23:26,160 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 08:23:26,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:23:26" (1/1) ... [2018-01-21 08:23:26,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c63e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:26, skipping insertion in model container [2018-01-21 08:23:26,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:23:26" (1/1) ... [2018-01-21 08:23:26,177 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:23:26,216 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:23:26,341 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:23:26,366 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:23:26,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:26 WrapperNode [2018-01-21 08:23:26,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 08:23:26,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 08:23:26,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 08:23:26,377 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 08:23:26,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:26" (1/1) ... [2018-01-21 08:23:26,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:26" (1/1) ... [2018-01-21 08:23:26,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:26" (1/1) ... [2018-01-21 08:23:26,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:26" (1/1) ... [2018-01-21 08:23:26,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:26" (1/1) ... [2018-01-21 08:23:26,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:26" (1/1) ... [2018-01-21 08:23:26,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:26" (1/1) ... [2018-01-21 08:23:26,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 08:23:26,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 08:23:26,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 08:23:26,421 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 08:23:26,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:26" (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 [2018-01-21 08:23:26,468 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 08:23:26,469 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 08:23:26,469 INFO L136 BoogieDeclarations]: Found implementation of procedure __list_add [2018-01-21 08:23:26,469 INFO L136 BoogieDeclarations]: Found implementation of procedure list_add_tail [2018-01-21 08:23:26,469 INFO L136 BoogieDeclarations]: Found implementation of procedure destroy_sub [2018-01-21 08:23:26,469 INFO L136 BoogieDeclarations]: Found implementation of procedure destroy_top [2018-01-21 08:23:26,469 INFO L136 BoogieDeclarations]: Found implementation of procedure insert_sub [2018-01-21 08:23:26,469 INFO L136 BoogieDeclarations]: Found implementation of procedure create_sub_list [2018-01-21 08:23:26,469 INFO L136 BoogieDeclarations]: Found implementation of procedure insert_top [2018-01-21 08:23:26,469 INFO L136 BoogieDeclarations]: Found implementation of procedure create_top [2018-01-21 08:23:26,469 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 08:23:26,470 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 08:23:26,470 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 08:23:26,470 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 08:23:26,470 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 08:23:26,470 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 08:23:26,470 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 08:23:26,470 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 08:23:26,470 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 08:23:26,470 INFO L128 BoogieDeclarations]: Found specification of procedure abort [2018-01-21 08:23:26,471 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 08:23:26,471 INFO L128 BoogieDeclarations]: Found specification of procedure __list_add [2018-01-21 08:23:26,471 INFO L128 BoogieDeclarations]: Found specification of procedure list_add_tail [2018-01-21 08:23:26,471 INFO L128 BoogieDeclarations]: Found specification of procedure destroy_sub [2018-01-21 08:23:26,471 INFO L128 BoogieDeclarations]: Found specification of procedure destroy_top [2018-01-21 08:23:26,471 INFO L128 BoogieDeclarations]: Found specification of procedure insert_sub [2018-01-21 08:23:26,471 INFO L128 BoogieDeclarations]: Found specification of procedure create_sub_list [2018-01-21 08:23:26,471 INFO L128 BoogieDeclarations]: Found specification of procedure insert_top [2018-01-21 08:23:26,471 INFO L128 BoogieDeclarations]: Found specification of procedure create_top [2018-01-21 08:23:26,471 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 08:23:26,471 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 08:23:26,472 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 08:23:26,817 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 08:23:26,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:23:26 BoogieIcfgContainer [2018-01-21 08:23:26,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 08:23:26,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 08:23:26,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 08:23:26,820 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 08:23:26,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 08:23:26" (1/3) ... [2018-01-21 08:23:26,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9256fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:23:26, skipping insertion in model container [2018-01-21 08:23:26,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:23:26" (2/3) ... [2018-01-21 08:23:26,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9256fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:23:26, skipping insertion in model container [2018-01-21 08:23:26,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:23:26" (3/3) ... [2018-01-21 08:23:26,823 INFO L105 eAbstractionObserver]: Analyzing ICFG test-0102_true-valid-memsafety.i [2018-01-21 08:23:26,830 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 08:23:26,836 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2018-01-21 08:23:26,875 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:23:26,875 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:23:26,875 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:23:26,875 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:23:26,875 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:23:26,876 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:23:26,876 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:23:26,876 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == __list_addErr0EnsuresViolation======== [2018-01-21 08:23:26,877 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:23:26,900 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states. [2018-01-21 08:23:26,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-21 08:23:26,909 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:23:26,910 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:23:26,910 INFO L371 AbstractCegarLoop]: === Iteration 1 === [__list_addErr0EnsuresViolation]=== [2018-01-21 08:23:26,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1421895685, now seen corresponding path program 1 times [2018-01-21 08:23:26,916 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:23:26,958 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:26,958 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:23:26,959 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:26,959 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:23:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:23:27,037 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:23:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:23:27,103 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:23:27,104 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:23:27,104 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:23:27,108 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:23:27,124 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:23:27,124 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:23:27,127 INFO L87 Difference]: Start difference. First operand 98 states. Second operand 2 states. [2018-01-21 08:23:27,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:23:27,244 INFO L93 Difference]: Finished difference Result 183 states and 216 transitions. [2018-01-21 08:23:27,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:23:27,246 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2018-01-21 08:23:27,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:23:27,251 INFO L225 Difference]: With dead ends: 183 [2018-01-21 08:23:27,251 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 08:23:27,257 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:23:27,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 08:23:27,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 08:23:27,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 08:23:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 08:23:27,280 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2018-01-21 08:23:27,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:23:27,280 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 08:23:27,280 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:23:27,281 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 08:23:27,281 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 08:23:27,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-01-21 08:23:27,349 INFO L401 ceAbstractionStarter]: For program point L627'(line 627) no Hoare annotation was computed. [2018-01-21 08:23:27,350 INFO L401 ceAbstractionStarter]: For program point __list_addErr0EnsuresViolation(lines 623 631) no Hoare annotation was computed. [2018-01-21 08:23:27,350 INFO L401 ceAbstractionStarter]: For program point __list_addEXIT(lines 623 631) no Hoare annotation was computed. [2018-01-21 08:23:27,350 INFO L401 ceAbstractionStarter]: For program point L629(line 629) no Hoare annotation was computed. [2018-01-21 08:23:27,350 INFO L401 ceAbstractionStarter]: For program point L628(line 628) no Hoare annotation was computed. [2018-01-21 08:23:27,350 INFO L401 ceAbstractionStarter]: For program point L627(line 627) no Hoare annotation was computed. [2018-01-21 08:23:27,351 INFO L404 ceAbstractionStarter]: At program point __list_addENTRY(lines 623 631) the Hoare annotation is: true [2018-01-21 08:23:27,351 INFO L401 ceAbstractionStarter]: For program point __list_addFINAL(lines 623 631) no Hoare annotation was computed. [2018-01-21 08:23:27,351 INFO L404 ceAbstractionStarter]: At program point L670(line 670) the Hoare annotation is: true [2018-01-21 08:23:27,351 INFO L401 ceAbstractionStarter]: For program point insert_subFINAL(lines 665 672) no Hoare annotation was computed. [2018-01-21 08:23:27,351 INFO L401 ceAbstractionStarter]: For program point L667(line 667) no Hoare annotation was computed. [2018-01-21 08:23:27,351 INFO L401 ceAbstractionStarter]: For program point insert_subErr0EnsuresViolation(lines 665 672) no Hoare annotation was computed. [2018-01-21 08:23:27,351 INFO L401 ceAbstractionStarter]: For program point L668''(lines 668 669) no Hoare annotation was computed. [2018-01-21 08:23:27,352 INFO L401 ceAbstractionStarter]: For program point L668(lines 668 669) no Hoare annotation was computed. [2018-01-21 08:23:27,352 INFO L401 ceAbstractionStarter]: For program point insert_subEXIT(lines 665 672) no Hoare annotation was computed. [2018-01-21 08:23:27,352 INFO L401 ceAbstractionStarter]: For program point L667'(line 667) no Hoare annotation was computed. [2018-01-21 08:23:27,352 INFO L404 ceAbstractionStarter]: At program point insert_subENTRY(lines 665 672) the Hoare annotation is: true [2018-01-21 08:23:27,352 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initErr0EnsuresViolation(lines 1 702) no Hoare annotation was computed. [2018-01-21 08:23:27,352 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 702) no Hoare annotation was computed. [2018-01-21 08:23:27,352 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 702) the Hoare annotation is: true [2018-01-21 08:23:27,352 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 702) no Hoare annotation was computed. [2018-01-21 08:23:27,353 INFO L401 ceAbstractionStarter]: For program point L692(lines 692 694) no Hoare annotation was computed. [2018-01-21 08:23:27,353 INFO L404 ceAbstractionStarter]: At program point L692''(lines 692 694) the Hoare annotation is: true [2018-01-21 08:23:27,353 INFO L401 ceAbstractionStarter]: For program point create_topErr0EnsuresViolation(lines 690 695) no Hoare annotation was computed. [2018-01-21 08:23:27,353 INFO L404 ceAbstractionStarter]: At program point L693(line 693) the Hoare annotation is: true [2018-01-21 08:23:27,353 INFO L404 ceAbstractionStarter]: At program point create_topENTRY(lines 690 695) the Hoare annotation is: true [2018-01-21 08:23:27,353 INFO L401 ceAbstractionStarter]: For program point create_topEXIT(lines 690 695) no Hoare annotation was computed. [2018-01-21 08:23:27,353 INFO L401 ceAbstractionStarter]: For program point L693'(line 693) no Hoare annotation was computed. [2018-01-21 08:23:27,353 INFO L401 ceAbstractionStarter]: For program point L692'''(lines 692 694) no Hoare annotation was computed. [2018-01-21 08:23:27,354 INFO L401 ceAbstractionStarter]: For program point insert_topErr0EnsuresViolation(lines 681 689) no Hoare annotation was computed. [2018-01-21 08:23:27,354 INFO L401 ceAbstractionStarter]: For program point L684(lines 684 685) no Hoare annotation was computed. [2018-01-21 08:23:27,354 INFO L404 ceAbstractionStarter]: At program point L684''(lines 684 685) the Hoare annotation is: true [2018-01-21 08:23:27,354 INFO L401 ceAbstractionStarter]: For program point L683(line 683) no Hoare annotation was computed. [2018-01-21 08:23:27,354 INFO L401 ceAbstractionStarter]: For program point L683'(line 683) no Hoare annotation was computed. [2018-01-21 08:23:27,354 INFO L404 ceAbstractionStarter]: At program point L687(line 687) the Hoare annotation is: true [2018-01-21 08:23:27,354 INFO L404 ceAbstractionStarter]: At program point L686(line 686) the Hoare annotation is: true [2018-01-21 08:23:27,355 INFO L404 ceAbstractionStarter]: At program point insert_topENTRY(lines 681 689) the Hoare annotation is: true [2018-01-21 08:23:27,355 INFO L401 ceAbstractionStarter]: For program point insert_topEXIT(lines 681 689) no Hoare annotation was computed. [2018-01-21 08:23:27,355 INFO L401 ceAbstractionStarter]: For program point insert_topFINAL(lines 681 689) no Hoare annotation was computed. [2018-01-21 08:23:27,355 INFO L401 ceAbstractionStarter]: For program point L650(line 650) no Hoare annotation was computed. [2018-01-21 08:23:27,355 INFO L401 ceAbstractionStarter]: For program point L650'(line 650) no Hoare annotation was computed. [2018-01-21 08:23:27,355 INFO L401 ceAbstractionStarter]: For program point destroy_subErr0EnsuresViolation(lines 645 653) no Hoare annotation was computed. [2018-01-21 08:23:27,355 INFO L401 ceAbstractionStarter]: For program point L649(line 649) no Hoare annotation was computed. [2018-01-21 08:23:27,356 INFO L401 ceAbstractionStarter]: For program point L648(lines 648 652) no Hoare annotation was computed. [2018-01-21 08:23:27,356 INFO L404 ceAbstractionStarter]: At program point destroy_subENTRY(lines 645 653) the Hoare annotation is: true [2018-01-21 08:23:27,356 INFO L401 ceAbstractionStarter]: For program point L647(line 647) no Hoare annotation was computed. [2018-01-21 08:23:27,356 INFO L404 ceAbstractionStarter]: At program point L648''(lines 648 652) the Hoare annotation is: true [2018-01-21 08:23:27,356 INFO L401 ceAbstractionStarter]: For program point L648'''(lines 648 652) no Hoare annotation was computed. [2018-01-21 08:23:27,356 INFO L401 ceAbstractionStarter]: For program point L649'(line 649) no Hoare annotation was computed. [2018-01-21 08:23:27,356 INFO L401 ceAbstractionStarter]: For program point L647'(line 647) no Hoare annotation was computed. [2018-01-21 08:23:27,356 INFO L401 ceAbstractionStarter]: For program point destroy_subEXIT(lines 645 653) no Hoare annotation was computed. [2018-01-21 08:23:27,357 INFO L401 ceAbstractionStarter]: For program point L677'''(lines 677 679) no Hoare annotation was computed. [2018-01-21 08:23:27,357 INFO L404 ceAbstractionStarter]: At program point L678(line 678) the Hoare annotation is: true [2018-01-21 08:23:27,357 INFO L401 ceAbstractionStarter]: For program point L677(lines 677 679) no Hoare annotation was computed. [2018-01-21 08:23:27,357 INFO L404 ceAbstractionStarter]: At program point L677''(lines 677 679) the Hoare annotation is: true [2018-01-21 08:23:27,357 INFO L401 ceAbstractionStarter]: For program point L675(line 675) no Hoare annotation was computed. [2018-01-21 08:23:27,357 INFO L401 ceAbstractionStarter]: For program point create_sub_listEXIT(lines 673 680) no Hoare annotation was computed. [2018-01-21 08:23:27,357 INFO L404 ceAbstractionStarter]: At program point create_sub_listENTRY(lines 673 680) the Hoare annotation is: true [2018-01-21 08:23:27,358 INFO L401 ceAbstractionStarter]: For program point create_sub_listErr0EnsuresViolation(lines 673 680) no Hoare annotation was computed. [2018-01-21 08:23:27,358 INFO L401 ceAbstractionStarter]: For program point L678'(line 678) no Hoare annotation was computed. [2018-01-21 08:23:27,358 INFO L401 ceAbstractionStarter]: For program point L675'(line 675) no Hoare annotation was computed. [2018-01-21 08:23:27,358 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 702) the Hoare annotation is: true [2018-01-21 08:23:27,358 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 702) no Hoare annotation was computed. [2018-01-21 08:23:27,358 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 702) the Hoare annotation is: true [2018-01-21 08:23:27,358 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startErr0EnsuresViolation(lines 1 702) no Hoare annotation was computed. [2018-01-21 08:23:27,358 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 702) no Hoare annotation was computed. [2018-01-21 08:23:27,359 INFO L404 ceAbstractionStarter]: At program point mainENTRY(lines 696 702) the Hoare annotation is: true [2018-01-21 08:23:27,359 INFO L401 ceAbstractionStarter]: For program point L698'''(line 698) no Hoare annotation was computed. [2018-01-21 08:23:27,359 INFO L401 ceAbstractionStarter]: For program point L698'(line 698) no Hoare annotation was computed. [2018-01-21 08:23:27,359 INFO L401 ceAbstractionStarter]: For program point L700(line 700) no Hoare annotation was computed. [2018-01-21 08:23:27,359 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 696 702) no Hoare annotation was computed. [2018-01-21 08:23:27,359 INFO L404 ceAbstractionStarter]: At program point L699(line 699) the Hoare annotation is: true [2018-01-21 08:23:27,359 INFO L401 ceAbstractionStarter]: For program point L698(line 698) no Hoare annotation was computed. [2018-01-21 08:23:27,359 INFO L401 ceAbstractionStarter]: For program point L698''''(line 698) no Hoare annotation was computed. [2018-01-21 08:23:27,360 INFO L404 ceAbstractionStarter]: At program point L698''(line 698) the Hoare annotation is: true [2018-01-21 08:23:27,360 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 696 702) no Hoare annotation was computed. [2018-01-21 08:23:27,360 INFO L401 ceAbstractionStarter]: For program point mainErr0EnsuresViolation(lines 696 702) no Hoare annotation was computed. [2018-01-21 08:23:27,360 INFO L401 ceAbstractionStarter]: For program point list_add_tailEXIT(lines 632 635) no Hoare annotation was computed. [2018-01-21 08:23:27,360 INFO L404 ceAbstractionStarter]: At program point L634'(line 634) the Hoare annotation is: true [2018-01-21 08:23:27,360 INFO L401 ceAbstractionStarter]: For program point list_add_tailFINAL(lines 632 635) no Hoare annotation was computed. [2018-01-21 08:23:27,360 INFO L401 ceAbstractionStarter]: For program point L634(line 634) no Hoare annotation was computed. [2018-01-21 08:23:27,360 INFO L401 ceAbstractionStarter]: For program point L634''(line 634) no Hoare annotation was computed. [2018-01-21 08:23:27,361 INFO L404 ceAbstractionStarter]: At program point list_add_tailENTRY(lines 632 635) the Hoare annotation is: true [2018-01-21 08:23:27,361 INFO L401 ceAbstractionStarter]: For program point list_add_tailErr0EnsuresViolation(lines 632 635) no Hoare annotation was computed. [2018-01-21 08:23:27,361 INFO L401 ceAbstractionStarter]: For program point destroy_topErr0EnsuresViolation(lines 654 664) no Hoare annotation was computed. [2018-01-21 08:23:27,361 INFO L401 ceAbstractionStarter]: For program point L661(line 661) no Hoare annotation was computed. [2018-01-21 08:23:27,361 INFO L401 ceAbstractionStarter]: For program point L660(line 660) no Hoare annotation was computed. [2018-01-21 08:23:27,361 INFO L401 ceAbstractionStarter]: For program point L656(line 656) no Hoare annotation was computed. [2018-01-21 08:23:27,361 INFO L404 ceAbstractionStarter]: At program point L659(line 659) the Hoare annotation is: true [2018-01-21 08:23:27,361 INFO L401 ceAbstractionStarter]: For program point L658(line 658) no Hoare annotation was computed. [2018-01-21 08:23:27,361 INFO L404 ceAbstractionStarter]: At program point L657''(lines 657 663) the Hoare annotation is: true [2018-01-21 08:23:27,362 INFO L401 ceAbstractionStarter]: For program point L657(lines 657 663) no Hoare annotation was computed. [2018-01-21 08:23:27,362 INFO L404 ceAbstractionStarter]: At program point L659'(line 659) the Hoare annotation is: true [2018-01-21 08:23:27,362 INFO L401 ceAbstractionStarter]: For program point L658'(line 658) no Hoare annotation was computed. [2018-01-21 08:23:27,362 INFO L401 ceAbstractionStarter]: For program point L656'(line 656) no Hoare annotation was computed. [2018-01-21 08:23:27,362 INFO L401 ceAbstractionStarter]: For program point L657'''(lines 657 663) no Hoare annotation was computed. [2018-01-21 08:23:27,362 INFO L404 ceAbstractionStarter]: At program point destroy_topENTRY(lines 654 664) the Hoare annotation is: true [2018-01-21 08:23:27,362 INFO L401 ceAbstractionStarter]: For program point destroy_topEXIT(lines 654 664) no Hoare annotation was computed. [2018-01-21 08:23:27,367 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:23:27,367 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:23:27,367 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:23:27,367 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:23:27,367 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:23:27,367 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:23:27,367 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:23:27,368 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == insert_subErr0EnsuresViolation======== [2018-01-21 08:23:27,368 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:23:27,371 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states. [2018-01-21 08:23:27,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-21 08:23:27,374 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:23:27,374 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:23:27,374 INFO L371 AbstractCegarLoop]: === Iteration 1 === [insert_subErr0EnsuresViolation]=== [2018-01-21 08:23:27,374 INFO L82 PathProgramCache]: Analyzing trace with hash 712574584, now seen corresponding path program 1 times [2018-01-21 08:23:27,375 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:23:27,376 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:27,376 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:23:27,376 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:27,376 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:23:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:23:27,401 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:23:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:23:27,438 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:23:27,438 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:23:27,438 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:23:27,439 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:23:27,439 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:23:27,439 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:23:27,440 INFO L87 Difference]: Start difference. First operand 98 states. Second operand 2 states. [2018-01-21 08:23:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:23:27,453 INFO L93 Difference]: Finished difference Result 183 states and 216 transitions. [2018-01-21 08:23:27,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:23:27,453 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2018-01-21 08:23:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:23:27,458 INFO L225 Difference]: With dead ends: 183 [2018-01-21 08:23:27,458 INFO L226 Difference]: Without dead ends: 54 [2018-01-21 08:23:27,459 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:23:27,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-21 08:23:27,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-01-21 08:23:27,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-21 08:23:27,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2018-01-21 08:23:27,479 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 42 [2018-01-21 08:23:27,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:23:27,479 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2018-01-21 08:23:27,479 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:23:27,479 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2018-01-21 08:23:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-21 08:23:27,481 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:23:27,482 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:23:27,482 INFO L371 AbstractCegarLoop]: === Iteration 2 === [insert_subErr0EnsuresViolation]=== [2018-01-21 08:23:27,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1047454716, now seen corresponding path program 1 times [2018-01-21 08:23:27,482 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:23:27,483 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:27,483 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:23:27,483 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:27,483 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:23:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:23:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:23:27,623 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:23:27,636 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:23:27,643 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:23:27,644 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:23:27,645 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:23:27,661 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:23:27,661 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:23:27,661 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:23:27,661 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:23:27,661 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:23:27,662 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:23:27,662 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:23:27,662 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 08:23:27,662 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:23:27,664 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states. [2018-01-21 08:23:27,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 08:23:27,664 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:23:27,664 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 08:23:27,664 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 08:23:27,664 INFO L82 PathProgramCache]: Analyzing trace with hash 189700, now seen corresponding path program 1 times [2018-01-21 08:23:27,664 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:23:27,665 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:27,665 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:23:27,665 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:27,666 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:23:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:23:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:23:27,670 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:23:27,671 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:23:27,672 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:23:27,672 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:23:27,672 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:23:27,672 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:23:27,673 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:23:27,673 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:23:27,673 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:23:27,673 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == create_topErr0EnsuresViolation======== [2018-01-21 08:23:27,673 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:23:27,674 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states. [2018-01-21 08:23:27,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-21 08:23:27,675 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:23:27,675 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:23:27,675 INFO L371 AbstractCegarLoop]: === Iteration 1 === [create_topErr0EnsuresViolation]=== [2018-01-21 08:23:27,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1605295434, now seen corresponding path program 1 times [2018-01-21 08:23:27,675 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:23:27,676 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:27,676 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:23:27,676 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:27,676 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:23:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:23:27,684 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:23:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:23:27,694 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:23:27,694 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:23:27,694 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:23:27,695 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:23:27,695 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:23:27,695 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:23:27,695 INFO L87 Difference]: Start difference. First operand 98 states. Second operand 2 states. [2018-01-21 08:23:27,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:23:27,708 INFO L93 Difference]: Finished difference Result 183 states and 216 transitions. [2018-01-21 08:23:27,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:23:27,708 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-01-21 08:23:27,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:23:27,709 INFO L225 Difference]: With dead ends: 183 [2018-01-21 08:23:27,710 INFO L226 Difference]: Without dead ends: 55 [2018-01-21 08:23:27,711 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:23:27,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-21 08:23:27,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-01-21 08:23:27,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-21 08:23:27,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2018-01-21 08:23:27,718 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 12 [2018-01-21 08:23:27,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:23:27,718 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2018-01-21 08:23:27,718 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:23:27,718 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2018-01-21 08:23:27,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-01-21 08:23:27,720 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:23:27,720 INFO L322 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2018-01-21 08:23:27,721 INFO L371 AbstractCegarLoop]: === Iteration 2 === [create_topErr0EnsuresViolation]=== [2018-01-21 08:23:27,721 INFO L82 PathProgramCache]: Analyzing trace with hash -817398474, now seen corresponding path program 1 times [2018-01-21 08:23:27,721 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:23:27,721 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:27,722 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:23:27,722 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:23:27,722 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:23:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:23:27,753 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:23:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-01-21 08:23:27,868 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:23:27,868 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 08:23:27,869 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 98 with the following transitions: [2018-01-21 08:23:27,871 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [5], [7], [8], [9], [14], [16], [18], [42], [43], [44], [48], [51], [54], [60], [62], [63], [64], [72], [73], [75], [76], [102], [103], [105], [109], [112], [115], [122], [123], [124], [125], [130], [135], [141], [142], [143], [144], [145], [149], [150], [155], [156], [157], [158], [159], [160], [161], [162], [163], [164], [165] [2018-01-21 08:23:27,932 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 08:23:27,933 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