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_mostprecise.epf -i ../../../trunk/examples/svcomp/list-ext-properties/960521-1_1_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 03:10:22,108 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 03:10:22,111 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 03:10:22,137 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 03:10:22,138 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 03:10:22,139 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 03:10:22,142 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 03:10:22,146 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 03:10:22,148 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 03:10:22,152 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 03:10:22,153 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 03:10:22,154 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 03:10:22,155 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 03:10:22,159 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 03:10:22,160 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 03:10:22,164 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 03:10:22,173 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 03:10:22,176 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 03:10:22,178 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 03:10:22,179 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 03:10:22,182 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 03:10:22,187 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 03:10:22,188 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 03:10:22,189 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_mostprecise.epf [2018-01-21 03:10:22,207 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 03:10:22,212 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 03:10:22,213 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 03:10:22,213 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 03:10:22,213 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 03:10:22,213 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 03:10:22,213 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 03:10:22,214 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 03:10:22,214 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 03:10:22,214 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 03:10:22,215 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 03:10:22,215 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 03:10:22,215 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 03:10:22,215 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 03:10:22,215 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 03:10:22,216 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 03:10:22,216 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 03:10:22,216 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 03:10:22,217 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 03:10:22,217 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 03:10:22,217 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 03:10:22,217 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 03:10:22,217 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 03:10:22,218 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 03:10:22,218 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 03:10:22,218 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 03:10:22,218 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 03:10:22,218 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 03:10:22,219 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 03:10:22,219 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 03:10:22,219 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 03:10:22,219 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 03:10:22,219 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 03:10:22,219 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 03:10:22,220 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 03:10:22,220 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 03:10:22,222 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 03:10:22,222 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 03:10:22,223 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 03:10:22,223 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 03:10:22,286 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 03:10:22,303 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 03:10:22,306 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 03:10:22,307 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 03:10:22,308 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 03:10:22,308 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext-properties/960521-1_1_false-valid-deref.i [2018-01-21 03:10:22,610 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 03:10:22,622 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 03:10:22,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 03:10:22,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 03:10:22,637 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 03:10:22,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:10:22" (1/1) ... [2018-01-21 03:10:22,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79924daa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:10:22, skipping insertion in model container [2018-01-21 03:10:22,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:10:22" (1/1) ... [2018-01-21 03:10:22,699 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:10:22,840 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:10:23,005 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:10:23,025 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:10:23,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:10:23 WrapperNode [2018-01-21 03:10:23,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 03:10:23,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 03:10:23,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 03:10:23,044 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 03:10:23,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:10:23" (1/1) ... [2018-01-21 03:10:23,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:10:23" (1/1) ... [2018-01-21 03:10:23,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:10:23" (1/1) ... [2018-01-21 03:10:23,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:10:23" (1/1) ... [2018-01-21 03:10:23,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:10:23" (1/1) ... [2018-01-21 03:10:23,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:10:23" (1/1) ... [2018-01-21 03:10:23,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:10:23" (1/1) ... [2018-01-21 03:10:23,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 03:10:23,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 03:10:23,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 03:10:23,093 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 03:10:23,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:10:23" (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 03:10:23,161 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 03:10:23,162 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 03:10:23,162 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-21 03:10:23,162 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 03:10:23,162 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 03:10:23,162 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 03:10:23,162 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 03:10:23,163 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 03:10:23,163 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 03:10:23,163 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 03:10:23,163 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 03:10:23,163 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 03:10:23,164 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-21 03:10:23,164 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 03:10:23,164 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 03:10:23,164 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 03:10:23,607 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 03:10:23,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:10:23 BoogieIcfgContainer [2018-01-21 03:10:23,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 03:10:23,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 03:10:23,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 03:10:23,612 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 03:10:23,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 03:10:22" (1/3) ... [2018-01-21 03:10:23,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1715d37d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:10:23, skipping insertion in model container [2018-01-21 03:10:23,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:10:23" (2/3) ... [2018-01-21 03:10:23,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1715d37d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:10:23, skipping insertion in model container [2018-01-21 03:10:23,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:10:23" (3/3) ... [2018-01-21 03:10:23,617 INFO L105 eAbstractionObserver]: Analyzing ICFG 960521-1_1_false-valid-deref.i [2018-01-21 03:10:23,626 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 03:10:23,635 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 03:10:23,703 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:10:23,704 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:10:23,704 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:10:23,704 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:10:23,704 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:10:23,704 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:10:23,705 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:10:23,711 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 03:10:23,712 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:10:23,777 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-21 03:10:23,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 03:10:23,790 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:10:23,792 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 03:10:23,792 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 03:10:23,800 INFO L82 PathProgramCache]: Analyzing trace with hash 103790, now seen corresponding path program 1 times [2018-01-21 03:10:23,803 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:10:23,882 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:10:23,883 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:10:23,883 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:10:23,883 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:10:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:10:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:10:24,055 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:10:24,073 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:10:24,098 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:10:24,098 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:10:24,102 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:10:24,102 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:10:24,103 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:10:24,103 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:10:24,103 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:10:24,103 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-21 03:10:24,103 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:10:24,107 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-21 03:10:24,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 03:10:24,109 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:10:24,109 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 03:10:24,109 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-21 03:10:24,109 INFO L82 PathProgramCache]: Analyzing trace with hash -568733067, now seen corresponding path program 1 times [2018-01-21 03:10:24,110 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:10:24,112 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:10:24,112 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:10:24,112 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:10:24,112 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:10:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:10:24,169 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:10:24,230 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 03:10:24,244 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:10:24,244 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:10:24,244 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:10:24,248 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:10:24,288 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:10:24,295 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:10:24,298 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2018-01-21 03:10:24,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:10:24,491 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2018-01-21 03:10:24,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:10:24,492 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-01-21 03:10:24,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:10:24,498 INFO L225 Difference]: With dead ends: 75 [2018-01-21 03:10:24,499 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 03:10:24,501 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 03:10:24,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 03:10:24,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 03:10:24,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 03:10:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 03:10:24,526 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2018-01-21 03:10:24,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:10:24,527 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 03:10:24,527 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:10:24,527 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 03:10:24,527 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 03:10:24,529 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:10:24,530 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:10:24,530 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:10:24,530 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:10:24,530 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:10:24,530 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:10:24,530 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:10:24,530 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 03:10:24,530 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:10:24,533 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-21 03:10:24,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 03:10:24,534 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:10:24,535 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 03:10:24,535 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:10:24,535 INFO L82 PathProgramCache]: Analyzing trace with hash 100681403, now seen corresponding path program 1 times [2018-01-21 03:10:24,535 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:10:24,537 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:10:24,537 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:10:24,537 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:10:24,537 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:10:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:10:24,552 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:10:24,578 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 03:10:24,579 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:10:24,579 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:10:24,579 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:10:24,579 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:10:24,580 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:10:24,580 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:10:24,580 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2018-01-21 03:10:24,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:10:24,590 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2018-01-21 03:10:24,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:10:24,591 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 28 [2018-01-21 03:10:24,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:10:24,593 INFO L225 Difference]: With dead ends: 75 [2018-01-21 03:10:24,594 INFO L226 Difference]: Without dead ends: 39 [2018-01-21 03:10:24,594 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 03:10:24,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-21 03:10:24,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-21 03:10:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-21 03:10:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2018-01-21 03:10:24,608 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 28 [2018-01-21 03:10:24,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:10:24,608 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2018-01-21 03:10:24,609 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:10:24,609 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2018-01-21 03:10:24,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-21 03:10:24,610 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:10:24,610 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:10:24,610 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:10:24,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1417341781, now seen corresponding path program 1 times [2018-01-21 03:10:24,611 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:10:24,612 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:10:24,612 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:10:24,612 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:10:24,612 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:10:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:10:24,683 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:10:24,841 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 03:10:24,842 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:10:24,842 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 03:10:24,842 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:10:24,851 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 03:10:24,851 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 03:10:24,852 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 03:10:24,852 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 5 states. [2018-01-21 03:10:25,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:10:25,119 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2018-01-21 03:10:25,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 03:10:25,120 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-01-21 03:10:25,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:10:25,128 INFO L225 Difference]: With dead ends: 67 [2018-01-21 03:10:25,129 INFO L226 Difference]: Without dead ends: 49 [2018-01-21 03:10:25,130 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-21 03:10:25,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-21 03:10:25,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2018-01-21 03:10:25,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-21 03:10:25,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-01-21 03:10:25,145 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 32 [2018-01-21 03:10:25,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:10:25,145 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-01-21 03:10:25,145 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 03:10:25,145 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-01-21 03:10:25,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 03:10:25,147 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:10:25,151 INFO L322 BasicCegarLoop]: trace histogram [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] [2018-01-21 03:10:25,151 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:10:25,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1542466606, now seen corresponding path program 1 times [2018-01-21 03:10:25,151 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:10:25,153 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:10:25,153 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:10:25,153 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:10:25,153 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:10:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:10:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:10:25,333 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:10:25,353 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:10:25,360 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:10:25,363 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:10:25,364 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:10:25,390 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:10:25,390 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:10:25,390 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:10:25,391 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:10:25,391 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:10:25,391 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:10:25,391 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:10:25,392 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 03:10:25,392 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:10:25,394 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-21 03:10:25,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-21 03:10:25,395 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:10:25,395 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] [2018-01-21 03:10:25,395 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 03:10:25,395 INFO L82 PathProgramCache]: Analyzing trace with hash -308274780, now seen corresponding path program 1 times [2018-01-21 03:10:25,395 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:10:25,396 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:10:25,396 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:10:25,396 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:10:25,397 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:10:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:10:25,426 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:10:25,453 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 03:10:25,453 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:10:25,454 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:10:25,454 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:10:25,462 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:10:25,462 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:10:25,463 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:10:25,463 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2018-01-21 03:10:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:10:25,471 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2018-01-21 03:10:25,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:10:25,471 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2018-01-21 03:10:25,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:10:25,479 INFO L225 Difference]: With dead ends: 75 [2018-01-21 03:10:25,479 INFO L226 Difference]: Without dead ends: 37 [2018-01-21 03:10:25,480 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 03:10:25,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-21 03:10:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-21 03:10:25,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-21 03:10:25,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2018-01-21 03:10:25,485 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 26 [2018-01-21 03:10:25,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:10:25,485 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2018-01-21 03:10:25,485 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:10:25,485 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2018-01-21 03:10:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-21 03:10:25,488 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:10:25,488 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 03:10:25,488 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 03:10:25,488 INFO L82 PathProgramCache]: Analyzing trace with hash 198122686, now seen corresponding path program 1 times [2018-01-21 03:10:25,488 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:10:25,489 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:10:25,489 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:10:25,489 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:10:25,490 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:10:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:10:25,535 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:10:25,609 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 03:10:25,609 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:10:25,609 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 03:10:25,609 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:10:25,610 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 03:10:25,610 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 03:10:25,617 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 03:10:25,617 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 5 states. [2018-01-21 03:10:25,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:10:25,770 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2018-01-21 03:10:25,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 03:10:25,774 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2018-01-21 03:10:25,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:10:25,775 INFO L225 Difference]: With dead ends: 63 [2018-01-21 03:10:25,775 INFO L226 Difference]: Without dead ends: 47 [2018-01-21 03:10:25,776 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-21 03:10:25,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-01-21 03:10:25,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2018-01-21 03:10:25,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-21 03:10:25,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2018-01-21 03:10:25,782 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 30 [2018-01-21 03:10:25,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:10:25,782 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2018-01-21 03:10:25,783 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 03:10:25,783 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2018-01-21 03:10:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-21 03:10:25,786 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:10:25,786 INFO L322 BasicCegarLoop]: trace histogram [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] [2018-01-21 03:10:25,786 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 03:10:25,786 INFO L82 PathProgramCache]: Analyzing trace with hash 555794391, now seen corresponding path program 1 times [2018-01-21 03:10:25,787 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:10:25,787 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:10:25,788 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:10:25,788 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:10:25,788 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:10:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:10:25,840 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:10:26,324 WARN L146 SmtUtils]: Spent 167ms on a formula simplification. DAG size of input: 25 DAG size of output 17 [2018-01-21 03:10:26,791 WARN L146 SmtUtils]: Spent 147ms on a formula simplification. DAG size of input: 21 DAG size of output 14 [2018-01-21 03:10:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 03:10:26,805 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:10:26,805 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-21 03:10:26,806 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:10:26,806 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-21 03:10:26,806 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-21 03:10:26,806 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-01-21 03:10:26,807 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 9 states. [2018-01-21 03:10:27,740 WARN L143 SmtUtils]: Spent 347ms on a formula simplification that was a NOOP. DAG size: 31 [2018-01-21 03:10:28,020 WARN L143 SmtUtils]: Spent 150ms on a formula simplification that was a NOOP. DAG size: 25 [2018-01-21 03:10:28,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:10:28,804 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-01-21 03:10:28,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-21 03:10:28,805 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2018-01-21 03:10:28,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:10:28,805 INFO L225 Difference]: With dead ends: 39 [2018-01-21 03:10:28,806 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 03:10:28,806 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-01-21 03:10:28,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 03:10:28,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 03:10:28,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 03:10:28,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 03:10:28,807 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2018-01-21 03:10:28,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:10:28,808 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 03:10:28,808 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-21 03:10:28,808 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 03:10:28,808 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 03:10:28,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 03:10:28 BoogieIcfgContainer [2018-01-21 03:10:28,811 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 03:10:28,812 INFO L168 Benchmark]: Toolchain (without parser) took 6201.50 ms. Allocated memory was 298.3 MB in the beginning and 478.7 MB in the end (delta: 180.4 MB). Free memory was 255.4 MB in the beginning and 440.7 MB in the end (delta: -185.3 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 03:10:28,814 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 298.3 MB. Free memory is still 261.4 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 03:10:28,814 INFO L168 Benchmark]: CACSL2BoogieTranslator took 414.41 ms. Allocated memory is still 298.3 MB. Free memory was 255.4 MB in the beginning and 245.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-21 03:10:28,814 INFO L168 Benchmark]: Boogie Preprocessor took 48.57 ms. Allocated memory is still 298.3 MB. Free memory was 245.5 MB in the beginning and 243.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 03:10:28,815 INFO L168 Benchmark]: RCFGBuilder took 515.02 ms. Allocated memory is still 298.3 MB. Free memory was 243.4 MB in the beginning and 226.5 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 5.3 GB. [2018-01-21 03:10:28,815 INFO L168 Benchmark]: TraceAbstraction took 5202.38 ms. Allocated memory was 298.3 MB in the beginning and 478.7 MB in the end (delta: 180.4 MB). Free memory was 226.5 MB in the beginning and 440.7 MB in the end (delta: -214.2 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 03:10:28,817 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 298.3 MB. Free memory is still 261.4 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 414.41 ms. Allocated memory is still 298.3 MB. Free memory was 255.4 MB in the beginning and 245.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 48.57 ms. Allocated memory is still 298.3 MB. Free memory was 245.5 MB in the beginning and 243.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 515.02 ms. Allocated memory is still 298.3 MB. Free memory was 243.4 MB in the beginning and 226.5 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 5202.38 ms. Allocated memory was 298.3 MB in the beginning and 478.7 MB in the end (delta: 180.4 MB). Free memory was 226.5 MB in the beginning and 440.7 MB in the end (delta: -214.2 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) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - 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: [L619] int *a, *b; [L620] int n; VAL [\old(a)=4, \old(a)=7, \old(b)=3, \old(b)=2, \old(n)=5, a={0:0}, b={0:0}, n=0] - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 43 locations, 4 error locations. UNSAFE Result, 0.4s 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=43occurred 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: 622]: 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: fooErr0EnsuresViolation CFG has 4 procedures, 43 locations, 4 error locations. SAFE Result, 0.4s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 45 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 324 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L619] int *a, *b; [L620] int n; VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={0:0}, b={0:0}, n=0] [L632] n = 1 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={0:0}, b={0:0}, n=1] [L633] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L636] EXPR, FCALL malloc(n * sizeof(*a)) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={0:0}, b={0:0}, malloc(n * sizeof(*a))={8:0}, n=1] [L636] a = malloc(n * sizeof(*a)) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={8:0}, b={0:0}, malloc(n * sizeof(*a))={8:0}, n=1] [L637] EXPR, FCALL malloc(n * sizeof(*b)) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={8:0}, b={0:0}, malloc(n * sizeof(*a))={8:0}, malloc(n * sizeof(*b))={14:0}, n=1] [L637] b = malloc(n * sizeof(*b)) [L638] EXPR b++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={8:0}, b={14:4}, b++={14:0}, malloc(n * sizeof(*a))={8:0}, malloc(n * sizeof(*b))={14:0}, n=1] [L638] FCALL *b++ = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={8:0}, b={14:4}, b++={14:0}, malloc(n * sizeof(*a))={8:0}, malloc(n * sizeof(*b))={14:0}, n=1] [L639] CALL foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={8:0}, b={14:4}, n=1] [L624] int i; [L625] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={8:0}, b={14:4}, i=0, n=1] [L625] COND TRUE i < n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={8:0}, b={14:4}, i=0, n=1] [L626] FCALL a[i] = n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={8:0}, b={14:4}, i=0, n=1] [L625] i++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={8:0}, b={14:4}, i=1, n=1] [L625] COND FALSE !(i < n) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={8:0}, b={14:4}, i=1, n=1] [L627] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={8:0}, b={14:4}, i=0, n=1] [L627] COND FALSE, RET !(i < n - 1) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={8:0}, b={14:4}, i=0, n=1] [L639] foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={8:0}, b={14:4}, malloc(n * sizeof(*a))={8:0}, malloc(n * sizeof(*b))={14:0}, n=1] [L640] FCALL b[-2] VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={8:0}, b={14:4}, b[-2]=6, malloc(n * sizeof(*a))={8:0}, malloc(n * sizeof(*b))={14:0}, n=1] [L640] COND TRUE b[-2] [L641] FCALL free(a) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={8:0}, b={14:4}, malloc(n * sizeof(*a))={8:0}, malloc(n * sizeof(*b))={14:0}, n=1] [L641] FCALL free(b-1) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={8:0}, b={14:4}, malloc(n * sizeof(*a))={8:0}, malloc(n * sizeof(*b))={14:0}, n=1] [L644] return 0; VAL [a={8:0}, b={14:4}, n=1] - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 43 locations, 4 error locations. UNSAFE Result, 0.8s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 75 SDtfs, 44 SDslu, 52 SDs, 0 SdLazy, 43 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred 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, 2 MinimizatonAttempts, 8 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 2744 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 630]: 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 4 procedures, 43 locations, 4 error locations. SAFE Result, 3.4s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 2.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 100 SDtfs, 69 SDslu, 95 SDs, 0 SdLazy, 218 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred 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, 8 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 87 ConstructedInterpolants, 0 QuantifiedInterpolants, 11857 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 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/960521-1_1_false-valid-deref.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_03-10-28-855.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/960521-1_1_false-valid-deref.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_03-10-28-855.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/960521-1_1_false-valid-deref.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_03-10-28-855.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/960521-1_1_false-valid-deref.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_03-10-28-855.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/960521-1_1_false-valid-deref.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_03-10-28-855.csv Received shutdown request...