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/ldv-memsafety/memleaks_test17_2_false-valid-free.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 00:55:10,407 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 00:55:10,409 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 00:55:10,424 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 00:55:10,424 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 00:55:10,425 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 00:55:10,426 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 00:55:10,428 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 00:55:10,430 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 00:55:10,431 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 00:55:10,432 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-01-21 00:55:10,453 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 00:55:10,461 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 00:55:10,461 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 00:55:10,462 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 00:55:10,462 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 00:55:10,462 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 00:55:10,462 INFO L133 SettingsManager]: * Deactivate Weak Equivalences=true [2018-01-21 00:55:10,463 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 00:55:10,463 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 00:55:10,463 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 00:55:10,463 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 00:55:10,463 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 00:55:10,463 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 00:55:10,464 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 00:55:10,464 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 00:55:10,464 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 00:55:10,464 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 00:55:10,464 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 00:55:10,464 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 00:55:10,464 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 00:55:10,465 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 00:55:10,465 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 00:55:10,465 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 00:55:10,465 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 00:55:10,465 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 00:55:10,465 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 00:55:10,466 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 00:55:10,466 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 00:55:10,466 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 00:55:10,466 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 00:55:10,466 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 00:55:10,466 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 00:55:10,467 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 00:55:10,467 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 00:55:10,467 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 00:55:10,467 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 00:55:10,467 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 00:55:10,467 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 00:55:10,468 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 00:55:10,468 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 00:55:10,501 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 00:55:10,512 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 00:55:10,515 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 00:55:10,516 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 00:55:10,517 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 00:55:10,517 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/memleaks_test17_2_false-valid-free.i [2018-01-21 00:55:10,703 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 00:55:10,706 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 00:55:10,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 00:55:10,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 00:55:10,713 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 00:55:10,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:55:10" (1/1) ... [2018-01-21 00:55:10,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70b24fc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:55:10, skipping insertion in model container [2018-01-21 00:55:10,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:55:10" (1/1) ... [2018-01-21 00:55:10,732 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:55:10,781 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:55:10,908 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:55:10,931 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:55:10,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:55:10 WrapperNode [2018-01-21 00:55:10,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 00:55:10,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 00:55:10,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 00:55:10,942 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 00:55:10,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:55:10" (1/1) ... [2018-01-21 00:55:10,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:55:10" (1/1) ... [2018-01-21 00:55:10,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:55:10" (1/1) ... [2018-01-21 00:55:10,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:55:10" (1/1) ... [2018-01-21 00:55:10,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:55:10" (1/1) ... [2018-01-21 00:55:10,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:55:10" (1/1) ... [2018-01-21 00:55:10,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:55:10" (1/1) ... [2018-01-21 00:55:10,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 00:55:10,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 00:55:10,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 00:55:10,981 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 00:55:10,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:55:10" (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 00:55:11,031 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 00:55:11,031 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 00:55:11,031 INFO L136 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2018-01-21 00:55:11,031 INFO L136 BoogieDeclarations]: Found implementation of procedure alloc_unsafe_17 [2018-01-21 00:55:11,032 INFO L136 BoogieDeclarations]: Found implementation of procedure free_17 [2018-01-21 00:55:11,032 INFO L136 BoogieDeclarations]: Found implementation of procedure entry_point [2018-01-21 00:55:11,032 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 00:55:11,032 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 00:55:11,032 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 00:55:11,032 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 00:55:11,033 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 00:55:11,033 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 00:55:11,033 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 00:55:11,033 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 00:55:11,033 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 00:55:11,033 INFO L128 BoogieDeclarations]: Found specification of procedure ldv_malloc [2018-01-21 00:55:11,033 INFO L128 BoogieDeclarations]: Found specification of procedure alloc_unsafe_17 [2018-01-21 00:55:11,034 INFO L128 BoogieDeclarations]: Found specification of procedure free_17 [2018-01-21 00:55:11,034 INFO L128 BoogieDeclarations]: Found specification of procedure entry_point [2018-01-21 00:55:11,034 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 00:55:11,034 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 00:55:11,034 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 00:55:11,287 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 00:55:11,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:55:11 BoogieIcfgContainer [2018-01-21 00:55:11,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 00:55:11,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 00:55:11,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 00:55:11,292 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 00:55:11,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 12:55:10" (1/3) ... [2018-01-21 00:55:11,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@758636d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:55:11, skipping insertion in model container [2018-01-21 00:55:11,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:55:10" (2/3) ... [2018-01-21 00:55:11,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@758636d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:55:11, skipping insertion in model container [2018-01-21 00:55:11,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:55:11" (3/3) ... [2018-01-21 00:55:11,296 INFO L105 eAbstractionObserver]: Analyzing ICFG memleaks_test17_2_false-valid-free.i [2018-01-21 00:55:11,306 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 00:55:11,313 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-01-21 00:55:11,362 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:55:11,362 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:55:11,362 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:55:11,362 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:55:11,363 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:55:11,363 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:55:11,363 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:55:11,363 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ldv_mallocErr0EnsuresViolation======== [2018-01-21 00:55:11,364 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:55:11,380 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-01-21 00:55:11,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-21 00:55:11,385 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:55:11,385 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:55:11,386 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ldv_mallocErr0EnsuresViolation]=== [2018-01-21 00:55:11,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1596927186, now seen corresponding path program 1 times [2018-01-21 00:55:11,391 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:55:11,440 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:11,440 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:55:11,440 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:11,440 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:55:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:55:11,489 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:55:11,547 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 00:55:11,549 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:55:11,549 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:55:11,550 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:55:11,552 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 00:55:11,564 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 00:55:11,564 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:55:11,566 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2018-01-21 00:55:11,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:55:11,804 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2018-01-21 00:55:11,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 00:55:11,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-01-21 00:55:11,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:55:11,813 INFO L225 Difference]: With dead ends: 125 [2018-01-21 00:55:11,814 INFO L226 Difference]: Without dead ends: 31 [2018-01-21 00:55:11,817 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:55:11,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-01-21 00:55:11,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-01-21 00:55:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-01-21 00:55:11,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2018-01-21 00:55:11,850 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 11 [2018-01-21 00:55:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:55:11,850 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2018-01-21 00:55:11,851 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 00:55:11,851 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2018-01-21 00:55:11,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-21 00:55:11,853 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:55:11,853 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:55:11,853 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ldv_mallocErr0EnsuresViolation]=== [2018-01-21 00:55:11,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1343609524, now seen corresponding path program 1 times [2018-01-21 00:55:11,854 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:55:11,855 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:11,856 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:55:11,856 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:11,856 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:55:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:55:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:55:11,928 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:55:11,937 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:55:11,940 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:55:11,953 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:55:11,953 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:55:11,953 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:55:11,953 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:55:11,954 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:55:11,954 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:55:11,954 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:55:11,954 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 00:55:11,954 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:55:11,956 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-01-21 00:55:11,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 00:55:11,956 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:55:11,956 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 00:55:11,956 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 00:55:11,956 INFO L82 PathProgramCache]: Analyzing trace with hash 142100, now seen corresponding path program 1 times [2018-01-21 00:55:11,956 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:55:11,958 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:11,958 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:55:11,958 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:11,958 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:55:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:55:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:55:11,969 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:55:11,970 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:55:11,973 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:55:11,973 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:55:11,973 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:55:11,973 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:55:11,974 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:55:11,974 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:55:11,974 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:55:11,974 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 00:55:11,974 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:55:11,976 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-01-21 00:55:11,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 00:55:11,978 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:55:11,978 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 00:55:11,978 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:55:11,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1836971356, now seen corresponding path program 1 times [2018-01-21 00:55:11,979 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:55:11,980 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:11,981 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:55:11,981 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:11,981 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:55:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:55:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:55:12,015 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:55:12,017 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:55:12,018 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:55:12,019 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:55:12,019 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:55:12,019 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:55:12,023 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:55:12,023 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:55:12,023 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:55:12,023 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:55:12,023 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:55:12,023 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:55:12,024 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:55:12,024 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 00:55:12,024 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:55:12,026 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-01-21 00:55:12,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-21 00:55:12,027 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:55:12,027 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:55:12,027 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 00:55:12,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1817080875, now seen corresponding path program 1 times [2018-01-21 00:55:12,028 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:55:12,029 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:12,029 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:55:12,029 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:12,029 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:55:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:55:12,041 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:55:12,094 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 00:55:12,094 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:55:12,094 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:55:12,094 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:55:12,095 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 00:55:12,095 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 00:55:12,095 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:55:12,095 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2018-01-21 00:55:12,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:55:12,201 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2018-01-21 00:55:12,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 00:55:12,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2018-01-21 00:55:12,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:55:12,202 INFO L225 Difference]: With dead ends: 125 [2018-01-21 00:55:12,202 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 00:55:12,203 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:55:12,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 00:55:12,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 00:55:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 00:55:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 00:55:12,204 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2018-01-21 00:55:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:55:12,204 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 00:55:12,205 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 00:55:12,205 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 00:55:12,205 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 00:55:12,207 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:55:12,208 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:55:12,208 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:55:12,208 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:55:12,208 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:55:12,208 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:55:12,208 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:55:12,208 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == free_17Err0EnsuresViolation======== [2018-01-21 00:55:12,208 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:55:12,209 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-01-21 00:55:12,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 00:55:12,211 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:55:12,211 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 00:55:12,211 INFO L371 AbstractCegarLoop]: === Iteration 1 === [free_17Err0EnsuresViolation]=== [2018-01-21 00:55:12,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1304963802, now seen corresponding path program 1 times [2018-01-21 00:55:12,212 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:55:12,214 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:12,214 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:55:12,214 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:12,214 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:55:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:55:12,229 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:55:12,250 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 00:55:12,250 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:55:12,251 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:55:12,251 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:55:12,251 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:55:12,251 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:55:12,251 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:55:12,252 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2018-01-21 00:55:12,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:55:12,259 INFO L93 Difference]: Finished difference Result 113 states and 133 transitions. [2018-01-21 00:55:12,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:55:12,260 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 28 [2018-01-21 00:55:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:55:12,261 INFO L225 Difference]: With dead ends: 113 [2018-01-21 00:55:12,262 INFO L226 Difference]: Without dead ends: 50 [2018-01-21 00:55:12,262 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 00:55:12,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-21 00:55:12,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-01-21 00:55:12,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-21 00:55:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2018-01-21 00:55:12,270 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 28 [2018-01-21 00:55:12,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:55:12,272 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2018-01-21 00:55:12,272 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:55:12,272 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2018-01-21 00:55:12,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-21 00:55:12,273 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:55:12,273 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 00:55:12,273 INFO L371 AbstractCegarLoop]: === Iteration 2 === [free_17Err0EnsuresViolation]=== [2018-01-21 00:55:12,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1633263304, now seen corresponding path program 1 times [2018-01-21 00:55:12,274 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:55:12,275 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:12,275 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:55:12,276 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:12,276 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:55:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:55:12,290 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:55:12,416 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 00:55:12,417 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:55:12,417 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 00:55:12,417 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:55:12,417 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 00:55:12,418 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 00:55:12,418 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:55:12,418 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 5 states. [2018-01-21 00:55:12,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:55:12,451 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2018-01-21 00:55:12,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:55:12,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-01-21 00:55:12,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:55:12,456 INFO L225 Difference]: With dead ends: 94 [2018-01-21 00:55:12,456 INFO L226 Difference]: Without dead ends: 52 [2018-01-21 00:55:12,457 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:55:12,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-01-21 00:55:12,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-01-21 00:55:12,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-21 00:55:12,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2018-01-21 00:55:12,465 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 32 [2018-01-21 00:55:12,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:55:12,465 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2018-01-21 00:55:12,465 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 00:55:12,465 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2018-01-21 00:55:12,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-21 00:55:12,467 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:55:12,467 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:55:12,467 INFO L371 AbstractCegarLoop]: === Iteration 3 === [free_17Err0EnsuresViolation]=== [2018-01-21 00:55:12,467 INFO L82 PathProgramCache]: Analyzing trace with hash 2058130582, now seen corresponding path program 1 times [2018-01-21 00:55:12,467 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:55:12,468 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:12,469 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:55:12,469 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:12,469 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:55:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:55:12,483 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:55:12,521 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 00:55:12,522 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:55:12,522 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 00:55:12,522 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:55:12,522 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 00:55:12,522 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 00:55:12,523 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 00:55:12,523 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 4 states. [2018-01-21 00:55:12,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:55:12,574 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2018-01-21 00:55:12,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 00:55:12,574 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2018-01-21 00:55:12,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:55:12,575 INFO L225 Difference]: With dead ends: 59 [2018-01-21 00:55:12,575 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 00:55:12,576 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 00:55:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 00:55:12,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 00:55:12,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 00:55:12,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 00:55:12,576 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2018-01-21 00:55:12,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:55:12,577 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 00:55:12,577 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 00:55:12,577 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 00:55:12,577 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 00:55:12,579 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:55:12,579 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:55:12,579 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:55:12,579 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:55:12,579 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:55:12,579 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:55:12,579 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:55:12,579 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == entry_pointErr0EnsuresViolation======== [2018-01-21 00:55:12,580 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:55:12,581 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-01-21 00:55:12,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-21 00:55:12,582 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:55:12,582 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:55:12,582 INFO L371 AbstractCegarLoop]: === Iteration 1 === [entry_pointErr0EnsuresViolation]=== [2018-01-21 00:55:12,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1485688060, now seen corresponding path program 1 times [2018-01-21 00:55:12,582 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:55:12,583 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:12,584 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:55:12,584 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:12,584 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:55:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:55:12,592 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:55:12,614 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 00:55:12,615 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:55:12,615 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:55:12,615 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:55:12,615 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 00:55:12,616 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 00:55:12,616 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:55:12,616 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2018-01-21 00:55:12,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:55:12,687 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2018-01-21 00:55:12,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 00:55:12,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2018-01-21 00:55:12,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:55:12,690 INFO L225 Difference]: With dead ends: 125 [2018-01-21 00:55:12,690 INFO L226 Difference]: Without dead ends: 65 [2018-01-21 00:55:12,691 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:55:12,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-01-21 00:55:12,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2018-01-21 00:55:12,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-21 00:55:12,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2018-01-21 00:55:12,696 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 15 [2018-01-21 00:55:12,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:55:12,696 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2018-01-21 00:55:12,696 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 00:55:12,696 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2018-01-21 00:55:12,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-21 00:55:12,697 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:55:12,698 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:55:12,698 INFO L371 AbstractCegarLoop]: === Iteration 2 === [entry_pointErr0EnsuresViolation]=== [2018-01-21 00:55:12,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1137499751, now seen corresponding path program 1 times [2018-01-21 00:55:12,698 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:55:12,699 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:12,699 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:55:12,699 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:12,699 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:55:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:55:12,707 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:55:12,767 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 00:55:12,767 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:55:12,767 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 00:55:12,768 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:55:12,768 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 00:55:12,768 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 00:55:12,768 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:55:12,769 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 5 states. [2018-01-21 00:55:12,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:55:12,793 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2018-01-21 00:55:12,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:55:12,794 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2018-01-21 00:55:12,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:55:12,795 INFO L225 Difference]: With dead ends: 100 [2018-01-21 00:55:12,795 INFO L226 Difference]: Without dead ends: 55 [2018-01-21 00:55:12,796 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:55:12,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-21 00:55:12,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-01-21 00:55:12,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-21 00:55:12,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2018-01-21 00:55:12,804 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 35 [2018-01-21 00:55:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:55:12,804 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2018-01-21 00:55:12,804 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 00:55:12,804 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2018-01-21 00:55:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-21 00:55:12,806 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:55:12,806 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:55:12,806 INFO L371 AbstractCegarLoop]: === Iteration 3 === [entry_pointErr0EnsuresViolation]=== [2018-01-21 00:55:12,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1184856503, now seen corresponding path program 1 times [2018-01-21 00:55:12,806 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:55:12,808 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:12,808 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:55:12,808 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:12,808 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:55:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:55:12,821 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:55:12,863 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 00:55:12,863 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:55:12,864 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 00:55:12,864 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:55:12,864 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 00:55:12,864 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 00:55:12,864 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 00:55:12,865 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 4 states. [2018-01-21 00:55:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:55:12,884 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2018-01-21 00:55:12,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 00:55:12,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2018-01-21 00:55:12,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:55:12,885 INFO L225 Difference]: With dead ends: 62 [2018-01-21 00:55:12,885 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 00:55:12,885 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 00:55:12,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 00:55:12,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 00:55:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 00:55:12,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 00:55:12,886 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2018-01-21 00:55:12,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:55:12,887 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 00:55:12,887 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 00:55:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 00:55:12,887 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 00:55:12,888 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:55:12,888 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:55:12,889 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:55:12,889 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:55:12,889 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:55:12,889 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:55:12,889 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:55:12,889 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == alloc_unsafe_17Err0EnsuresViolation======== [2018-01-21 00:55:12,889 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:55:12,890 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-01-21 00:55:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-21 00:55:12,891 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:55:12,892 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] [2018-01-21 00:55:12,892 INFO L371 AbstractCegarLoop]: === Iteration 1 === [alloc_unsafe_17Err0EnsuresViolation]=== [2018-01-21 00:55:12,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1272018460, now seen corresponding path program 1 times [2018-01-21 00:55:12,892 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:55:12,894 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:12,894 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:55:12,894 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:12,894 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:55:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:55:12,900 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:55:12,909 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 00:55:12,909 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:55:12,909 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:55:12,910 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:55:12,910 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:55:12,910 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:55:12,910 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:55:12,910 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2018-01-21 00:55:12,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:55:12,915 INFO L93 Difference]: Finished difference Result 113 states and 133 transitions. [2018-01-21 00:55:12,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:55:12,915 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2018-01-21 00:55:12,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:55:12,916 INFO L225 Difference]: With dead ends: 113 [2018-01-21 00:55:12,916 INFO L226 Difference]: Without dead ends: 39 [2018-01-21 00:55:12,916 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 00:55:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-21 00:55:12,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-21 00:55:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-21 00:55:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2018-01-21 00:55:12,921 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 22 [2018-01-21 00:55:12,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:55:12,922 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2018-01-21 00:55:12,922 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:55:12,922 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2018-01-21 00:55:12,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-21 00:55:12,923 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:55:12,923 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] [2018-01-21 00:55:12,923 INFO L371 AbstractCegarLoop]: === Iteration 2 === [alloc_unsafe_17Err0EnsuresViolation]=== [2018-01-21 00:55:12,923 INFO L82 PathProgramCache]: Analyzing trace with hash -184415516, now seen corresponding path program 1 times [2018-01-21 00:55:12,924 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:55:12,925 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:12,925 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:55:12,925 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:12,925 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:55:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:55:12,931 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:55:13,038 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 00:55:13,039 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:55:13,039 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 00:55:13,039 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:55:13,039 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 00:55:13,039 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 00:55:13,040 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:55:13,040 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 5 states. [2018-01-21 00:55:13,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:55:13,063 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2018-01-21 00:55:13,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:55:13,063 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-01-21 00:55:13,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:55:13,064 INFO L225 Difference]: With dead ends: 72 [2018-01-21 00:55:13,064 INFO L226 Difference]: Without dead ends: 41 [2018-01-21 00:55:13,065 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:55:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-21 00:55:13,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-21 00:55:13,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-21 00:55:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2018-01-21 00:55:13,069 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 25 [2018-01-21 00:55:13,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:55:13,070 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2018-01-21 00:55:13,070 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 00:55:13,070 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2018-01-21 00:55:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-21 00:55:13,071 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:55:13,071 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:55:13,071 INFO L371 AbstractCegarLoop]: === Iteration 3 === [alloc_unsafe_17Err0EnsuresViolation]=== [2018-01-21 00:55:13,072 INFO L82 PathProgramCache]: Analyzing trace with hash -169228986, now seen corresponding path program 1 times [2018-01-21 00:55:13,072 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:55:13,073 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:13,073 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:55:13,074 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:55:13,074 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:55:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:55:13,084 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:55:13,132 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 00:55:13,132 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:55:13,133 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 00:55:13,133 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:55:13,133 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 00:55:13,133 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 00:55:13,133 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 00:55:13,134 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 4 states. [2018-01-21 00:55:13,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:55:13,159 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2018-01-21 00:55:13,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 00:55:13,160 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2018-01-21 00:55:13,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:55:13,160 INFO L225 Difference]: With dead ends: 48 [2018-01-21 00:55:13,160 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 00:55:13,161 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 00:55:13,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 00:55:13,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 00:55:13,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 00:55:13,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 00:55:13,161 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2018-01-21 00:55:13,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:55:13,162 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 00:55:13,162 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 00:55:13,162 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 00:55:13,162 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 00:55:13,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 12:55:13 BoogieIcfgContainer [2018-01-21 00:55:13,164 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 00:55:13,164 INFO L168 Benchmark]: Toolchain (without parser) took 2461.15 ms. Allocated memory was 307.2 MB in the beginning and 481.3 MB in the end (delta: 174.1 MB). Free memory was 264.4 MB in the beginning and 434.0 MB in the end (delta: -169.6 MB). Peak memory consumption was 4.4 MB. Max. memory is 5.3 GB. [2018-01-21 00:55:13,165 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 307.2 MB. Free memory is still 271.4 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 00:55:13,165 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.59 ms. Allocated memory is still 307.2 MB. Free memory was 264.4 MB in the beginning and 251.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 5.3 GB. [2018-01-21 00:55:13,166 INFO L168 Benchmark]: Boogie Preprocessor took 38.54 ms. Allocated memory is still 307.2 MB. Free memory was 251.0 MB in the beginning and 249.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 00:55:13,166 INFO L168 Benchmark]: RCFGBuilder took 307.60 ms. Allocated memory is still 307.2 MB. Free memory was 249.0 MB in the beginning and 228.0 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 5.3 GB. [2018-01-21 00:55:13,166 INFO L168 Benchmark]: TraceAbstraction took 1874.14 ms. Allocated memory was 307.2 MB in the beginning and 481.3 MB in the end (delta: 174.1 MB). Free memory was 228.0 MB in the beginning and 434.0 MB in the end (delta: -206.0 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 00:55:13,167 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 307.2 MB. Free memory is still 271.4 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 234.59 ms. Allocated memory is still 307.2 MB. Free memory was 264.4 MB in the beginning and 251.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 38.54 ms. Allocated memory is still 307.2 MB. Free memory was 251.0 MB in the beginning and 249.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 307.60 ms. Allocated memory is still 307.2 MB. Free memory was 249.0 MB in the beginning and 228.0 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1874.14 ms. Allocated memory was 307.2 MB in the beginning and 481.3 MB in the end (delta: 174.1 MB). Free memory was 228.0 MB in the beginning and 434.0 MB in the end (delta: -206.0 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) - 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) - 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: 1072]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L1478] CALL entry_point() [L1465] int i; [L1466] int len = 10; VAL [len=10] [L1467] CALL ldv_malloc(sizeof(struct A17*)*len) VAL [\old(size)=40] [L1073] COND TRUE __VERIFIER_nondet_int() [L1074] EXPR, FCALL malloc(size) VAL [\old(size)=40, malloc(size)={42:0}, size=40] [L1074] return malloc(size); VAL [\old(size)=40, \result={42:0}, malloc(size)={42:0}, size=40] - StatisticsResult: Ultimate Automizer benchmark data for error location: ldv_mallocErr0EnsuresViolation CFG has 7 procedures, 64 locations, 7 error locations. UNSAFE Result, 0.5s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 55 SDtfs, 36 SDslu, 14 SDs, 0 SdLazy, 28 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred 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, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 160 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: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 7 procedures, 64 locations, 7 error locations. UNSAFE Result, 0.0s 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=64occurred 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 - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L1478] CALL entry_point() [L1465] int i; [L1466] int len = 10; VAL [len=10] [L1467] CALL, EXPR ldv_malloc(sizeof(struct A17*)*len) VAL [\old(size)=40] [L1073] COND FALSE !(__VERIFIER_nondet_int()) [L1076] RET return 0; VAL [\old(size)=40, \result={0:0}, size=40] [L1467] EXPR ldv_malloc(sizeof(struct A17*)*len) VAL [ldv_malloc(sizeof(struct A17*)*len)={0:0}, len=10] [L1467] struct A17 **array = (struct A17 **)ldv_malloc(sizeof(struct A17*)*len); [L1468] COND TRUE, RET !array VAL [array={0:0}, len=10] [L1478] entry_point() - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 7 procedures, 64 locations, 7 error locations. UNSAFE Result, 0.0s 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=64occurred 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, 19 NumberOfCodeBlocks, 19 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: 1477]: 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 7 procedures, 64 locations, 7 error locations. SAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 55 SDtfs, 31 SDslu, 14 SDs, 0 SdLazy, 28 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred 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, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 640 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 - PositiveResult [Line: 1457]: 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: free_17Err0EnsuresViolation CFG has 7 procedures, 64 locations, 7 error locations. SAFE Result, 0.3s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 137 SDtfs, 3 SDslu, 166 SDs, 0 SdLazy, 21 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 94 NumberOfCodeBlocks, 94 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 3919 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 1464]: 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: entry_pointErr0EnsuresViolation CFG has 7 procedures, 64 locations, 7 error locations. SAFE Result, 0.3s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 124 SDtfs, 35 SDslu, 188 SDs, 0 SdLazy, 50 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred 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, 12 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 87 NumberOfCodeBlocks, 87 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 4148 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 1439]: 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: alloc_unsafe_17Err0EnsuresViolation CFG has 7 procedures, 64 locations, 7 error locations. SAFE Result, 0.2s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 125 SDtfs, 3 SDslu, 130 SDs, 0 SdLazy, 21 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 71 ConstructedInterpolants, 0 QuantifiedInterpolants, 2581 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memleaks_test17_2_false-valid-free.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_00-55-13-175.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memleaks_test17_2_false-valid-free.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_00-55-13-175.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memleaks_test17_2_false-valid-free.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_00-55-13-175.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memleaks_test17_2_false-valid-free.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_00-55-13-175.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memleaks_test17_2_false-valid-free.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_00-55-13-175.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memleaks_test17_2_false-valid-free.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-4-2018-01-21_00-55-13-175.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memleaks_test17_2_false-valid-free.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-5-2018-01-21_00-55-13-175.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memleaks_test17_2_false-valid-free.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-6-2018-01-21_00-55-13-175.csv Received shutdown request...