java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf -i ../../../trunk/examples/svcomp/memsafety/test-0158_false-valid-free.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 23:28:56,994 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 23:28:56,996 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 23:28:57,009 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 23:28:57,010 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 23:28:57,011 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 23:28:57,012 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 23:28:57,013 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 23:28:57,015 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 23:28:57,015 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 23:28:57,016 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 23:28:57,016 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 23:28:57,017 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 23:28:57,018 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 23:28:57,019 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 23:28:57,021 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 23:28:57,023 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 23:28:57,025 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 23:28:57,027 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 23:28:57,028 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 23:28:57,030 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 23:28:57,030 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 23:28:57,031 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 23:28:57,032 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 23:28:57,033 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 23:28:57,034 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 23:28:57,034 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 23:28:57,035 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 23:28:57,035 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 23:28:57,035 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 23:28:57,036 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 23:28:57,036 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf [2018-01-24 23:28:57,046 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 23:28:57,046 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 23:28:57,047 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 23:28:57,047 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 23:28:57,047 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 23:28:57,048 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 23:28:57,048 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 23:28:57,048 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 23:28:57,049 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 23:28:57,049 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 23:28:57,049 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 23:28:57,049 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 23:28:57,050 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 23:28:57,050 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 23:28:57,050 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 23:28:57,050 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 23:28:57,050 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 23:28:57,051 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 23:28:57,051 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 23:28:57,051 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 23:28:57,051 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 23:28:57,051 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 23:28:57,052 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 23:28:57,052 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 23:28:57,052 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:28:57,052 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 23:28:57,053 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 23:28:57,053 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 23:28:57,053 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 23:28:57,053 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 23:28:57,053 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 23:28:57,053 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 23:28:57,054 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 23:28:57,054 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 23:28:57,055 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 23:28:57,055 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 23:28:57,090 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 23:28:57,102 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 23:28:57,107 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 23:28:57,108 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 23:28:57,109 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 23:28:57,109 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/test-0158_false-valid-free.i [2018-01-24 23:28:57,294 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 23:28:57,301 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 23:28:57,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 23:28:57,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 23:28:57,309 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 23:28:57,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:28:57" (1/1) ... [2018-01-24 23:28:57,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69156849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:28:57, skipping insertion in model container [2018-01-24 23:28:57,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:28:57" (1/1) ... [2018-01-24 23:28:57,333 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:28:57,375 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:28:57,488 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:28:57,503 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:28:57,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:28:57 WrapperNode [2018-01-24 23:28:57,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 23:28:57,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 23:28:57,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 23:28:57,511 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 23:28:57,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:28:57" (1/1) ... [2018-01-24 23:28:57,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:28:57" (1/1) ... [2018-01-24 23:28:57,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:28:57" (1/1) ... [2018-01-24 23:28:57,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:28:57" (1/1) ... [2018-01-24 23:28:57,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:28:57" (1/1) ... [2018-01-24 23:28:57,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:28:57" (1/1) ... [2018-01-24 23:28:57,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:28:57" (1/1) ... [2018-01-24 23:28:57,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 23:28:57,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 23:28:57,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 23:28:57,544 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 23:28:57,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:28:57" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:28:57,595 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 23:28:57,596 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 23:28:57,596 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 23:28:57,596 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 23:28:57,596 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 23:28:57,596 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 23:28:57,596 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 23:28:57,596 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 23:28:57,597 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 23:28:57,597 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 23:28:57,597 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 23:28:57,597 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 23:28:57,597 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 23:28:57,597 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 23:28:57,598 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 23:28:57,770 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 23:28:57,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:28:57 BoogieIcfgContainer [2018-01-24 23:28:57,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 23:28:57,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 23:28:57,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 23:28:57,773 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 23:28:57,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:28:57" (1/3) ... [2018-01-24 23:28:57,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d14bd05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:28:57, skipping insertion in model container [2018-01-24 23:28:57,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:28:57" (2/3) ... [2018-01-24 23:28:57,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d14bd05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:28:57, skipping insertion in model container [2018-01-24 23:28:57,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:28:57" (3/3) ... [2018-01-24 23:28:57,776 INFO L105 eAbstractionObserver]: Analyzing ICFG test-0158_false-valid-free.i [2018-01-24 23:28:57,782 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 23:28:57,788 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 15 error locations. [2018-01-24 23:28:57,835 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 23:28:57,836 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 23:28:57,836 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 23:28:57,836 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 23:28:57,836 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 23:28:57,836 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 23:28:57,836 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 23:28:57,836 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 23:28:57,837 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 23:28:57,857 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2018-01-24 23:28:57,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 23:28:57,863 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:28:57,864 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:28:57,865 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-24 23:28:57,870 INFO L82 PathProgramCache]: Analyzing trace with hash -875651709, now seen corresponding path program 1 times [2018-01-24 23:28:57,873 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:28:57,924 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:28:57,924 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:28:57,924 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:28:57,925 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:28:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:28:57,973 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:28:58,079 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 23:28:58,081 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:28:58,081 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 23:28:58,082 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:28:58,084 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 23:28:58,094 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 23:28:58,094 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:28:58,096 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2018-01-24 23:28:58,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:28:58,238 INFO L93 Difference]: Finished difference Result 38 states and 37 transitions. [2018-01-24 23:28:58,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 23:28:58,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-01-24 23:28:58,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:28:58,247 INFO L225 Difference]: With dead ends: 38 [2018-01-24 23:28:58,248 INFO L226 Difference]: Without dead ends: 30 [2018-01-24 23:28:58,250 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 23:28:58,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-01-24 23:28:58,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-01-24 23:28:58,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-01-24 23:28:58,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 29 transitions. [2018-01-24 23:28:58,275 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 29 transitions. Word has length 8 [2018-01-24 23:28:58,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:28:58,275 INFO L432 AbstractCegarLoop]: Abstraction has 30 states and 29 transitions. [2018-01-24 23:28:58,275 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 23:28:58,276 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 29 transitions. [2018-01-24 23:28:58,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 23:28:58,276 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:28:58,276 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:28:58,276 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-24 23:28:58,276 INFO L82 PathProgramCache]: Analyzing trace with hash -875651708, now seen corresponding path program 1 times [2018-01-24 23:28:58,276 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:28:58,277 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:28:58,277 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:28:58,277 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:28:58,277 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:28:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:28:58,295 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:28:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:28:58,386 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:28:58,387 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:28:58,387 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:28:58,388 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:28:58,389 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:28:58,389 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:28:58,389 INFO L87 Difference]: Start difference. First operand 30 states and 29 transitions. Second operand 4 states. [2018-01-24 23:28:58,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:28:58,438 INFO L93 Difference]: Finished difference Result 30 states and 29 transitions. [2018-01-24 23:28:58,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:28:58,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 23:28:58,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:28:58,440 INFO L225 Difference]: With dead ends: 30 [2018-01-24 23:28:58,440 INFO L226 Difference]: Without dead ends: 25 [2018-01-24 23:28:58,441 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 23:28:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-01-24 23:28:58,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-01-24 23:28:58,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-01-24 23:28:58,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 24 transitions. [2018-01-24 23:28:58,444 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 24 transitions. Word has length 8 [2018-01-24 23:28:58,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:28:58,444 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 24 transitions. [2018-01-24 23:28:58,444 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:28:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 24 transitions. [2018-01-24 23:28:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 23:28:58,445 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:28:58,445 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:28:58,445 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-24 23:28:58,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1516119050, now seen corresponding path program 1 times [2018-01-24 23:28:58,446 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:28:58,446 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:28:58,447 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:28:58,447 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:28:58,447 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:28:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:28:58,467 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:28:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:28:58,590 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:28:58,591 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:28:58,591 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:28:58,591 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:28:58,591 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:28:58,592 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:28:58,592 INFO L87 Difference]: Start difference. First operand 25 states and 24 transitions. Second operand 5 states. [2018-01-24 23:28:58,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:28:58,698 INFO L93 Difference]: Finished difference Result 25 states and 24 transitions. [2018-01-24 23:28:58,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:28:58,698 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-01-24 23:28:58,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:28:58,699 INFO L225 Difference]: With dead ends: 25 [2018-01-24 23:28:58,699 INFO L226 Difference]: Without dead ends: 24 [2018-01-24 23:28:58,700 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:28:58,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-01-24 23:28:58,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-01-24 23:28:58,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-01-24 23:28:58,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 23 transitions. [2018-01-24 23:28:58,705 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 23 transitions. Word has length 14 [2018-01-24 23:28:58,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:28:58,705 INFO L432 AbstractCegarLoop]: Abstraction has 24 states and 23 transitions. [2018-01-24 23:28:58,706 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:28:58,706 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 23 transitions. [2018-01-24 23:28:58,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 23:28:58,706 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:28:58,706 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:28:58,706 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-24 23:28:58,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1516119051, now seen corresponding path program 1 times [2018-01-24 23:28:58,707 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:28:58,709 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:28:58,709 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:28:58,709 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:28:58,709 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:28:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:28:58,725 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:28:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:28:58,801 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:28:58,801 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:28:58,801 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:28:58,802 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:28:58,802 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:28:58,802 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:28:58,802 INFO L87 Difference]: Start difference. First operand 24 states and 23 transitions. Second operand 5 states. [2018-01-24 23:28:58,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:28:58,867 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2018-01-24 23:28:58,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:28:58,868 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-01-24 23:28:58,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:28:58,868 INFO L225 Difference]: With dead ends: 24 [2018-01-24 23:28:58,868 INFO L226 Difference]: Without dead ends: 23 [2018-01-24 23:28:58,869 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:28:58,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-01-24 23:28:58,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-01-24 23:28:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-01-24 23:28:58,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2018-01-24 23:28:58,873 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 14 [2018-01-24 23:28:58,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:28:58,873 INFO L432 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2018-01-24 23:28:58,873 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:28:58,873 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2018-01-24 23:28:58,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 23:28:58,874 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:28:58,874 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:28:58,874 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-24 23:28:58,874 INFO L82 PathProgramCache]: Analyzing trace with hash 996493579, now seen corresponding path program 1 times [2018-01-24 23:28:58,875 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:28:58,875 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:28:58,875 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:28:58,876 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:28:58,876 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:28:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:28:58,890 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:28:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:28:58,949 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:28:58,949 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:28:58,949 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:28:58,949 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:28:58,949 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:28:58,950 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:28:58,950 INFO L87 Difference]: Start difference. First operand 23 states and 22 transitions. Second operand 6 states. [2018-01-24 23:28:59,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:28:59,008 INFO L93 Difference]: Finished difference Result 23 states and 22 transitions. [2018-01-24 23:28:59,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 23:28:59,009 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-01-24 23:28:59,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:28:59,009 INFO L225 Difference]: With dead ends: 23 [2018-01-24 23:28:59,009 INFO L226 Difference]: Without dead ends: 22 [2018-01-24 23:28:59,010 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-01-24 23:28:59,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-01-24 23:28:59,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-01-24 23:28:59,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-01-24 23:28:59,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 21 transitions. [2018-01-24 23:28:59,012 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 21 transitions. Word has length 16 [2018-01-24 23:28:59,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:28:59,012 INFO L432 AbstractCegarLoop]: Abstraction has 22 states and 21 transitions. [2018-01-24 23:28:59,012 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:28:59,012 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 21 transitions. [2018-01-24 23:28:59,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 23:28:59,013 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:28:59,013 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:28:59,013 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-24 23:28:59,014 INFO L82 PathProgramCache]: Analyzing trace with hash 996493580, now seen corresponding path program 1 times [2018-01-24 23:28:59,014 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:28:59,015 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:28:59,015 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:28:59,015 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:28:59,015 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:28:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-24 23:28:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-24 23:28:59,069 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-24 23:28:59,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.01 11:28:59 BoogieIcfgContainer [2018-01-24 23:28:59,094 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-24 23:28:59,095 INFO L168 Benchmark]: Toolchain (without parser) took 1800.53 ms. Allocated memory was 308.8 MB in the beginning and 471.3 MB in the end (delta: 162.5 MB). Free memory was 268.9 MB in the beginning and 362.5 MB in the end (delta: -93.6 MB). Peak memory consumption was 69.0 MB. Max. memory is 5.3 GB. [2018-01-24 23:28:59,096 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 308.8 MB. Free memory is still 274.9 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 23:28:59,096 INFO L168 Benchmark]: CACSL2BoogieTranslator took 208.91 ms. Allocated memory is still 308.8 MB. Free memory was 267.9 MB in the beginning and 256.8 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 5.3 GB. [2018-01-24 23:28:59,096 INFO L168 Benchmark]: Boogie Preprocessor took 32.51 ms. Allocated memory is still 308.8 MB. Free memory was 256.8 MB in the beginning and 255.8 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. [2018-01-24 23:28:59,096 INFO L168 Benchmark]: RCFGBuilder took 227.05 ms. Allocated memory is still 308.8 MB. Free memory was 255.8 MB in the beginning and 239.9 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 5.3 GB. [2018-01-24 23:28:59,097 INFO L168 Benchmark]: TraceAbstraction took 1322.93 ms. Allocated memory was 308.8 MB in the beginning and 471.3 MB in the end (delta: 162.5 MB). Free memory was 238.9 MB in the beginning and 362.5 MB in the end (delta: -123.5 MB). Peak memory consumption was 39.0 MB. Max. memory is 5.3 GB. [2018-01-24 23:28:59,098 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 308.8 MB. Free memory is still 274.9 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 208.91 ms. Allocated memory is still 308.8 MB. Free memory was 267.9 MB in the beginning and 256.8 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 32.51 ms. Allocated memory is still 308.8 MB. Free memory was 256.8 MB in the beginning and 255.8 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. * RCFGBuilder took 227.05 ms. Allocated memory is still 308.8 MB. Free memory was 255.8 MB in the beginning and 239.9 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1322.93 ms. Allocated memory was 308.8 MB in the beginning and 471.3 MB in the end (delta: 162.5 MB). Free memory was 238.9 MB in the beginning and 362.5 MB in the end (delta: -123.5 MB). Peak memory consumption was 39.0 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L742-L749] FCALL union { void *p0; struct { char c[2]; void *p1; void *p2; } str; } data; VAL [data={40:0}] [L750] EXPR, FCALL malloc(37U) VAL [data={40:0}, malloc(37U)={44:0}] [L750] FCALL data.p0 = malloc(37U) VAL [data={40:0}, malloc(37U)={44:0}] [L751] FCALL data.str.p2 = &data VAL [data={40:0}, malloc(37U)={44:0}] [L752] EXPR, FCALL data.p0 VAL [data={40:0}, data.p0={44:0}, malloc(37U)={44:0}] [L752] void *ptr = data.p0; [L753] FCALL data.str.c[1] = sizeof data.str.p1 VAL [data={40:0}, malloc(37U)={44:0}, ptr={44:0}] [L754] EXPR, FCALL data.p0 VAL [data={40:0}, data.p0={44:0}, malloc(37U)={44:0}, ptr={44:0}] [L754] FCALL free(data.p0) VAL [data={40:0}, data.p0={44:0}, malloc(37U)={44:0}, ptr={44:0}] [L755] FCALL free(ptr) VAL [data={40:0}, malloc(37U)={44:0}, ptr={44:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 15 error locations. UNSAFE Result, 1.2s OverallTime, 6 OverallIterations, 1 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 79 SDtfs, 82 SDslu, 105 SDs, 0 SdLazy, 108 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 76 NumberOfCodeBlocks, 76 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 3120 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/test-0158_false-valid-free.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-24_23-28-59-105.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/test-0158_false-valid-free.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-24_23-28-59-105.csv Received shutdown request...