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_imprecise.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1_false-unreach-call_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 01:05:50,833 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 01:05:50,835 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 01:05:50,849 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 01:05:50,850 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 01:05:50,851 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 01:05:50,852 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 01:05:50,853 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 01:05:50,856 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 01:05:50,857 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 01:05:50,858 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 01:05:50,858 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 01:05:50,859 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 01:05:50,860 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 01:05:50,861 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 01:05:50,863 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 01:05:50,866 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 01:05:50,868 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 01:05:50,869 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 01:05:50,870 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 01:05:50,872 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 01:05:50,878 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 01:05:50,879 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 01:05:50,879 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_imprecise.epf [2018-01-21 01:05:50,889 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 01:05:50,889 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 01:05:50,890 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 01:05:50,890 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 01:05:50,891 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 01:05:50,891 INFO L133 SettingsManager]: * Deactivate Weak Equivalences=true [2018-01-21 01:05:50,891 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 01:05:50,891 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 01:05:50,892 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 01:05:50,892 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 01:05:50,892 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 01:05:50,892 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 01:05:50,893 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 01:05:50,893 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 01:05:50,893 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 01:05:50,893 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 01:05:50,893 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 01:05:50,893 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 01:05:50,894 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 01:05:50,894 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 01:05:50,894 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 01:05:50,894 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 01:05:50,894 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 01:05:50,895 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 01:05:50,895 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 01:05:50,895 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 01:05:50,895 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 01:05:50,895 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 01:05:50,896 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 01:05:50,896 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 01:05:50,896 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 01:05:50,896 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 01:05:50,896 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 01:05:50,896 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 01:05:50,897 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 01:05:50,897 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 01:05:50,897 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 01:05:50,898 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 01:05:50,898 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 01:05:50,933 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 01:05:50,944 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 01:05:50,947 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 01:05:50,948 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 01:05:50,948 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 01:05:50,949 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1_false-unreach-call_false-valid-deref.i [2018-01-21 01:05:51,110 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 01:05:51,115 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 01:05:51,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 01:05:51,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 01:05:51,121 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 01:05:51,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 01:05:51" (1/1) ... [2018-01-21 01:05:51,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d3346b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 01:05:51, skipping insertion in model container [2018-01-21 01:05:51,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 01:05:51" (1/1) ... [2018-01-21 01:05:51,141 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 01:05:51,181 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 01:05:51,308 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 01:05:51,334 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 01:05:51,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 01:05:51 WrapperNode [2018-01-21 01:05:51,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 01:05:51,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 01:05:51,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 01:05:51,346 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 01:05:51,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 01:05:51" (1/1) ... [2018-01-21 01:05:51,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 01:05:51" (1/1) ... [2018-01-21 01:05:51,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 01:05:51" (1/1) ... [2018-01-21 01:05:51,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 01:05:51" (1/1) ... [2018-01-21 01:05:51,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 01:05:51" (1/1) ... [2018-01-21 01:05:51,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 01:05:51" (1/1) ... [2018-01-21 01:05:51,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 01:05:51" (1/1) ... [2018-01-21 01:05:51,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 01:05:51,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 01:05:51,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 01:05:51,387 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 01:05:51,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 01:05:51" (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 01:05:51,438 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 01:05:51,438 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 01:05:51,438 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 01:05:51,438 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 01:05:51,439 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 01:05:51,439 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 01:05:51,439 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 01:05:51,439 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 01:05:51,439 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 01:05:51,439 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 01:05:51,440 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 01:05:51,440 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 01:05:51,440 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 01:05:51,440 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 01:05:51,440 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 01:05:51,440 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 01:05:51,440 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 01:05:51,887 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 01:05:51,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 01:05:51 BoogieIcfgContainer [2018-01-21 01:05:51,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 01:05:51,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 01:05:51,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 01:05:51,891 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 01:05:51,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 01:05:51" (1/3) ... [2018-01-21 01:05:51,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57051268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 01:05:51, skipping insertion in model container [2018-01-21 01:05:51,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 01:05:51" (2/3) ... [2018-01-21 01:05:51,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57051268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 01:05:51, skipping insertion in model container [2018-01-21 01:05:51,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 01:05:51" (3/3) ... [2018-01-21 01:05:51,896 INFO L105 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1_false-unreach-call_false-valid-deref.i [2018-01-21 01:05:51,905 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 01:05:51,912 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 01:05:51,968 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 01:05:51,968 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 01:05:51,968 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 01:05:51,968 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 01:05:51,969 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 01:05:51,969 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 01:05:51,969 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 01:05:51,969 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 01:05:51,970 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 01:05:51,992 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2018-01-21 01:05:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 01:05:51,998 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 01:05:51,999 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 01:05:51,999 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 01:05:52,005 INFO L82 PathProgramCache]: Analyzing trace with hash 193414, now seen corresponding path program 1 times [2018-01-21 01:05:52,008 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 01:05:52,078 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 01:05:52,078 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 01:05:52,079 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 01:05:52,079 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 01:05:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 01:05:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 01:05:52,146 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 01:05:52,155 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 01:05:52,163 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 01:05:52,163 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 01:05:52,163 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 01:05:52,164 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 01:05:52,164 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 01:05:52,164 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 01:05:52,164 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 01:05:52,164 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 01:05:52,164 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 01:05:52,167 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2018-01-21 01:05:52,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 01:05:52,171 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 01:05:52,171 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] [2018-01-21 01:05:52,171 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 01:05:52,172 INFO L82 PathProgramCache]: Analyzing trace with hash 672370295, now seen corresponding path program 1 times [2018-01-21 01:05:52,172 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 01:05:52,173 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 01:05:52,174 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 01:05:52,174 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 01:05:52,174 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 01:05:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 01:05:52,214 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 01:05:52,382 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 01:05:52,383 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 01:05:52,384 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 01:05:52,384 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 01:05:52,388 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 01:05:52,404 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 01:05:52,405 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 01:05:52,408 INFO L87 Difference]: Start difference. First operand 79 states. Second operand 2 states. [2018-01-21 01:05:52,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 01:05:52,437 INFO L93 Difference]: Finished difference Result 122 states and 153 transitions. [2018-01-21 01:05:52,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 01:05:52,439 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-01-21 01:05:52,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 01:05:52,454 INFO L225 Difference]: With dead ends: 122 [2018-01-21 01:05:52,454 INFO L226 Difference]: Without dead ends: 76 [2018-01-21 01:05:52,457 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 01:05:52,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-01-21 01:05:52,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-01-21 01:05:52,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-21 01:05:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2018-01-21 01:05:52,494 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 21 [2018-01-21 01:05:52,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 01:05:52,494 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2018-01-21 01:05:52,494 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 01:05:52,495 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2018-01-21 01:05:52,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-21 01:05:52,496 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 01:05:52,496 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] [2018-01-21 01:05:52,496 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 01:05:52,497 INFO L82 PathProgramCache]: Analyzing trace with hash 288420789, now seen corresponding path program 1 times [2018-01-21 01:05:52,497 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 01:05:52,498 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 01:05:52,498 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 01:05:52,498 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 01:05:52,499 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 01:05:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 01:05:52,523 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 01:05:52,691 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 01:05:52,692 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 01:05:52,692 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 01:05:52,692 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 01:05:52,693 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 01:05:52,694 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 01:05:52,694 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 01:05:52,694 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 5 states. [2018-01-21 01:05:52,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 01:05:52,927 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2018-01-21 01:05:52,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 01:05:52,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2018-01-21 01:05:52,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 01:05:52,930 INFO L225 Difference]: With dead ends: 131 [2018-01-21 01:05:52,930 INFO L226 Difference]: Without dead ends: 112 [2018-01-21 01:05:52,931 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 01:05:52,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-01-21 01:05:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2018-01-21 01:05:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-01-21 01:05:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2018-01-21 01:05:52,939 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 30 [2018-01-21 01:05:52,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 01:05:52,939 INFO L432 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2018-01-21 01:05:52,939 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 01:05:52,940 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2018-01-21 01:05:52,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-21 01:05:52,941 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 01:05:52,941 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 01:05:52,941 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 01:05:52,941 INFO L82 PathProgramCache]: Analyzing trace with hash -892056259, now seen corresponding path program 1 times [2018-01-21 01:05:52,941 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 01:05:52,942 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 01:05:52,943 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 01:05:52,943 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 01:05:52,943 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 01:05:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 01:05:52,968 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 01:05:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 01:05:53,227 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 01:05:53,227 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 01:05:53,227 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 01:05:53,227 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 01:05:53,228 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 01:05:53,228 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-21 01:05:53,228 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 6 states. [2018-01-21 01:05:53,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 01:05:53,453 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2018-01-21 01:05:53,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-21 01:05:53,453 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2018-01-21 01:05:53,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 01:05:53,454 INFO L225 Difference]: With dead ends: 86 [2018-01-21 01:05:53,454 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 01:05:53,455 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-01-21 01:05:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 01:05:53,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 01:05:53,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 01:05:53,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 01:05:53,456 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2018-01-21 01:05:53,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 01:05:53,456 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 01:05:53,456 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 01:05:53,456 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 01:05:53,456 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 01:05:53,461 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 01:05:53,462 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 01:05:53,462 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 01:05:53,462 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 01:05:53,462 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 01:05:53,463 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 01:05:53,463 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 01:05:53,463 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 01:05:53,463 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 01:05:53,465 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2018-01-21 01:05:53,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 01:05:53,468 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 01:05:53,468 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 01:05:53,468 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 01:05:53,469 INFO L82 PathProgramCache]: Analyzing trace with hash 67738684, now seen corresponding path program 1 times [2018-01-21 01:05:53,469 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 01:05:53,470 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 01:05:53,471 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 01:05:53,471 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 01:05:53,471 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 01:05:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 01:05:53,486 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 01:05:53,500 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 01:05:53,501 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 01:05:53,501 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 01:05:53,501 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 01:05:53,502 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 01:05:53,502 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 01:05:53,502 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 01:05:53,502 INFO L87 Difference]: Start difference. First operand 79 states. Second operand 2 states. [2018-01-21 01:05:53,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 01:05:53,508 INFO L93 Difference]: Finished difference Result 122 states and 153 transitions. [2018-01-21 01:05:53,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 01:05:53,508 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-01-21 01:05:53,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 01:05:53,510 INFO L225 Difference]: With dead ends: 122 [2018-01-21 01:05:53,510 INFO L226 Difference]: Without dead ends: 74 [2018-01-21 01:05:53,510 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 01:05:53,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-01-21 01:05:53,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-01-21 01:05:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-01-21 01:05:53,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2018-01-21 01:05:53,518 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 19 [2018-01-21 01:05:53,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 01:05:53,518 INFO L432 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2018-01-21 01:05:53,518 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 01:05:53,518 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2018-01-21 01:05:53,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 01:05:53,520 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 01:05:53,520 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 01:05:53,520 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 01:05:53,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1796946170, now seen corresponding path program 1 times [2018-01-21 01:05:53,520 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 01:05:53,522 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 01:05:53,522 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 01:05:53,522 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 01:05:53,523 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 01:05:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 01:05:53,537 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 01:05:53,734 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 01:05:53,735 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 01:05:53,735 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 01:05:53,735 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 01:05:53,735 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 01:05:53,736 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 01:05:53,736 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 01:05:53,736 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand 5 states. [2018-01-21 01:05:53,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 01:05:53,910 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2018-01-21 01:05:53,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 01:05:53,911 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-01-21 01:05:53,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 01:05:53,912 INFO L225 Difference]: With dead ends: 127 [2018-01-21 01:05:53,913 INFO L226 Difference]: Without dead ends: 110 [2018-01-21 01:05:53,913 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 01:05:53,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-01-21 01:05:53,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 78. [2018-01-21 01:05:53,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-01-21 01:05:53,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2018-01-21 01:05:53,921 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 28 [2018-01-21 01:05:53,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 01:05:53,921 INFO L432 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2018-01-21 01:05:53,922 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 01:05:53,922 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2018-01-21 01:05:53,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-21 01:05:53,923 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 01:05:53,923 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 01:05:53,923 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 01:05:53,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1129796738, now seen corresponding path program 1 times [2018-01-21 01:05:53,924 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 01:05:53,926 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 01:05:53,926 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 01:05:53,926 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 01:05:53,926 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 01:05:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 01:05:53,944 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 01:05:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 01:05:54,025 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 01:05:54,025 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 01:05:54,025 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 01:05:54,025 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 01:05:54,026 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 01:05:54,026 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-21 01:05:54,026 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 6 states. [2018-01-21 01:05:54,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 01:05:54,206 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2018-01-21 01:05:54,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-21 01:05:54,206 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2018-01-21 01:05:54,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 01:05:54,207 INFO L225 Difference]: With dead ends: 84 [2018-01-21 01:05:54,207 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 01:05:54,207 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-01-21 01:05:54,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 01:05:54,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 01:05:54,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 01:05:54,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 01:05:54,208 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2018-01-21 01:05:54,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 01:05:54,208 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 01:05:54,208 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 01:05:54,208 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 01:05:54,208 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 01:05:54,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 01:05:54 BoogieIcfgContainer [2018-01-21 01:05:54,212 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 01:05:54,213 INFO L168 Benchmark]: Toolchain (without parser) took 3101.98 ms. Allocated memory was 308.3 MB in the beginning and 447.2 MB in the end (delta: 138.9 MB). Free memory was 266.4 MB in the beginning and 376.4 MB in the end (delta: -109.9 MB). Peak memory consumption was 29.0 MB. Max. memory is 5.3 GB. [2018-01-21 01:05:54,214 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 308.3 MB. Free memory is still 272.4 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 01:05:54,214 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.16 ms. Allocated memory is still 308.3 MB. Free memory was 265.4 MB in the beginning and 253.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 5.3 GB. [2018-01-21 01:05:54,214 INFO L168 Benchmark]: Boogie Preprocessor took 40.43 ms. Allocated memory is still 308.3 MB. Free memory was 253.4 MB in the beginning and 251.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 01:05:54,214 INFO L168 Benchmark]: RCFGBuilder took 501.42 ms. Allocated memory is still 308.3 MB. Free memory was 251.4 MB in the beginning and 225.4 MB in the end (delta: 26.0 MB). Peak memory consumption was 26.0 MB. Max. memory is 5.3 GB. [2018-01-21 01:05:54,215 INFO L168 Benchmark]: TraceAbstraction took 2323.10 ms. Allocated memory was 308.3 MB in the beginning and 447.2 MB in the end (delta: 138.9 MB). Free memory was 225.4 MB in the beginning and 376.4 MB in the end (delta: -151.0 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 01:05:54,216 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 308.3 MB. Free memory is still 272.4 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 229.16 ms. Allocated memory is still 308.3 MB. Free memory was 265.4 MB in the beginning and 253.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 40.43 ms. Allocated memory is still 308.3 MB. Free memory was 253.4 MB in the beginning and 251.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 501.42 ms. Allocated memory is still 308.3 MB. Free memory was 251.4 MB in the beginning and 225.4 MB in the end (delta: 26.0 MB). Peak memory consumption was 26.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 2323.10 ms. Allocated memory was 308.3 MB in the beginning and 447.2 MB in the end (delta: 138.9 MB). Free memory was 225.4 MB in the beginning and 376.4 MB in the end (delta: -151.0 MB). There was no memory consumed. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 3 procedures, 79 locations, 3 error locations. UNSAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 1]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 3 procedures, 79 locations, 3 error locations. SAFE Result, 1.2s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 194 SDtfs, 227 SDslu, 187 SDs, 0 SdLazy, 171 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=2, 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, 3 MinimizatonAttempts, 32 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 8306 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 991]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 3 procedures, 79 locations, 3 error locations. SAFE Result, 0.7s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 192 SDtfs, 227 SDslu, 181 SDs, 0 SdLazy, 171 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred 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, 3 MinimizatonAttempts, 32 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 7686 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 4/4 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/dll-rb-cnstr_1_false-unreach-call_false-valid-deref.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_01-05-54-225.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/dll-rb-cnstr_1_false-unreach-call_false-valid-deref.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_01-05-54-225.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/dll-rb-cnstr_1_false-unreach-call_false-valid-deref.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_01-05-54-225.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/dll-rb-cnstr_1_false-unreach-call_false-valid-deref.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_01-05-54-225.csv Received shutdown request...