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_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrcat-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 14:21:57,834 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 14:21:57,836 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 14:21:57,851 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 14:21:57,852 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 14:21:57,853 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 14:21:57,854 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 14:21:57,856 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 14:21:57,858 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 14:21:57,859 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 14:21:57,860 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 14:21:57,861 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 14:21:57,861 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 14:21:57,863 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 14:21:57,864 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 14:21:57,867 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 14:21:57,869 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 14:21:57,871 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 14:21:57,873 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 14:21:57,874 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 14:21:57,877 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-23 14:21:57,883 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-23 14:21:57,892 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 14:21:57,892 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 14:21:57,893 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 14:21:57,893 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 14:21:57,894 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 14:21:57,894 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 14:21:57,894 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 14:21:57,894 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 14:21:57,895 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 14:21:57,895 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 14:21:57,895 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 14:21:57,895 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 14:21:57,895 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 14:21:57,895 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 14:21:57,895 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 14:21:57,896 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 14:21:57,896 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 14:21:57,896 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 14:21:57,896 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 14:21:57,896 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 14:21:57,896 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 14:21:57,896 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 14:21:57,897 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 14:21:57,897 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 14:21:57,897 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 14:21:57,897 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:21:57,898 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 14:21:57,898 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 14:21:57,898 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 14:21:57,898 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 14:21:57,898 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 14:21:57,930 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 14:21:57,931 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 14:21:57,931 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 14:21:57,931 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 14:21:57,932 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 14:21:57,932 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 14:21:57,968 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 14:21:57,980 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 14:21:57,984 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 14:21:57,985 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 14:21:57,985 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 14:21:57,986 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrcat-alloca_true-valid-memsafety_true-termination.i [2018-01-23 14:21:58,147 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 14:21:58,152 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 14:21:58,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 14:21:58,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 14:21:58,161 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 14:21:58,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:21:58" (1/1) ... [2018-01-23 14:21:58,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@683c273b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:58, skipping insertion in model container [2018-01-23 14:21:58,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:21:58" (1/1) ... [2018-01-23 14:21:58,186 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:21:58,227 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:21:58,373 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:21:58,390 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:21:58,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:58 WrapperNode [2018-01-23 14:21:58,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 14:21:58,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 14:21:58,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 14:21:58,397 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 14:21:58,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:58" (1/1) ... [2018-01-23 14:21:58,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:58" (1/1) ... [2018-01-23 14:21:58,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:58" (1/1) ... [2018-01-23 14:21:58,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:58" (1/1) ... [2018-01-23 14:21:58,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:58" (1/1) ... [2018-01-23 14:21:58,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:58" (1/1) ... [2018-01-23 14:21:58,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:58" (1/1) ... [2018-01-23 14:21:58,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 14:21:58,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 14:21:58,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 14:21:58,442 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 14:21:58,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:58" (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 [2018-01-23 14:21:58,498 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 14:21:58,498 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 14:21:58,499 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrcat [2018-01-23 14:21:58,499 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 14:21:58,499 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-23 14:21:58,499 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-23 14:21:58,499 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 14:21:58,499 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 14:21:58,500 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 14:21:58,500 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-23 14:21:58,500 INFO L128 BoogieDeclarations]: Found specification of procedure cstrcat [2018-01-23 14:21:58,500 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 14:21:58,500 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 14:21:58,500 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 14:21:58,708 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 14:21:58,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:21:58 BoogieIcfgContainer [2018-01-23 14:21:58,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 14:21:58,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-23 14:21:58,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-23 14:21:58,711 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-23 14:21:58,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 02:21:58" (1/3) ... [2018-01-23 14:21:58,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1366555c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:21:58, skipping insertion in model container [2018-01-23 14:21:58,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:58" (2/3) ... [2018-01-23 14:21:58,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1366555c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:21:58, skipping insertion in model container [2018-01-23 14:21:58,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:21:58" (3/3) ... [2018-01-23 14:21:58,714 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcat-alloca_true-valid-memsafety_true-termination.i [2018-01-23 14:21:58,720 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-23 14:21:58,725 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-23 14:21:58,765 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:21:58,765 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:21:58,765 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:21:58,766 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:21:58,766 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:21:58,766 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:21:58,766 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:21:58,766 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-23 14:21:58,766 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:21:58,781 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-23 14:21:58,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-23 14:21:58,787 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:58,788 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-23 14:21:58,788 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-23 14:21:58,793 INFO L82 PathProgramCache]: Analyzing trace with hash 104751, now seen corresponding path program 1 times [2018-01-23 14:21:58,795 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:58,795 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:58,833 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:58,833 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:58,833 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:21:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:21:58,884 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:21:58,889 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:21:58,895 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:21:58,895 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:21:58,895 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:21:58,895 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:21:58,895 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:21:58,895 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:21:58,895 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:21:58,895 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrcatErr0EnsuresViolation======== [2018-01-23 14:21:58,895 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:21:58,897 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-23 14:21:58,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-23 14:21:58,898 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:58,898 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] [2018-01-23 14:21:58,898 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrcatErr0EnsuresViolation]=== [2018-01-23 14:21:58,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1425144812, now seen corresponding path program 1 times [2018-01-23 14:21:58,898 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:58,898 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:58,899 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:58,899 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:58,899 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:21:58,934 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:21:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:21:58,978 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:21:58,979 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:21:58,980 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:21:58,990 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:21:58,991 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:21:58,993 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2018-01-23 14:21:59,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:21:59,086 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2018-01-23 14:21:59,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:21:59,088 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2018-01-23 14:21:59,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:21:59,096 INFO L225 Difference]: With dead ends: 62 [2018-01-23 14:21:59,096 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:21:59,099 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 [2018-01-23 14:21:59,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:21:59,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:21:59,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:21:59,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:21:59,125 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2018-01-23 14:21:59,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:21:59,125 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:21:59,126 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:21:59,126 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:21:59,126 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:21:59,128 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:21:59,128 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:21:59,128 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:21:59,128 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:21:59,129 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:21:59,129 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:21:59,129 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:21:59,129 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-23 14:21:59,129 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:21:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-23 14:21:59,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-23 14:21:59,131 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:59,131 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:21:59,131 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:21:59,131 INFO L82 PathProgramCache]: Analyzing trace with hash -303941379, now seen corresponding path program 1 times [2018-01-23 14:21:59,131 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:59,131 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:59,132 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:59,132 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:59,132 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:21:59,147 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:21:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:21:59,226 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:21:59,227 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-23 14:21:59,227 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-23 14:21:59,227 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-23 14:21:59,227 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:21:59,228 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 5 states. [2018-01-23 14:21:59,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:21:59,359 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2018-01-23 14:21:59,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:21:59,360 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-01-23 14:21:59,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:21:59,366 INFO L225 Difference]: With dead ends: 96 [2018-01-23 14:21:59,366 INFO L226 Difference]: Without dead ends: 71 [2018-01-23 14:21:59,367 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-23 14:21:59,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-01-23 14:21:59,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 42. [2018-01-23 14:21:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-23 14:21:59,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2018-01-23 14:21:59,386 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 13 [2018-01-23 14:21:59,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:21:59,387 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2018-01-23 14:21:59,387 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-23 14:21:59,387 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2018-01-23 14:21:59,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-23 14:21:59,388 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:59,388 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:21:59,388 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:21:59,388 INFO L82 PathProgramCache]: Analyzing trace with hash -302094337, now seen corresponding path program 1 times [2018-01-23 14:21:59,389 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:59,389 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:59,390 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:59,390 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:59,390 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:21:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:21:59,423 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:21:59,427 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:21:59,428 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:21:59,428 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:21:59,435 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:21:59,435 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:21:59,435 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:21:59,435 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:21:59,436 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:21:59,436 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:21:59,436 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:21:59,436 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-23 14:21:59,436 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:21:59,438 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-23 14:21:59,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-23 14:21:59,438 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:59,439 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:21:59,439 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-23 14:21:59,439 INFO L82 PathProgramCache]: Analyzing trace with hash -661768057, now seen corresponding path program 1 times [2018-01-23 14:21:59,439 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:59,439 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:59,440 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:59,440 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:59,441 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:21:59,451 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:21:59,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:21:59,509 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:21:59,509 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-23 14:21:59,510 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-23 14:21:59,510 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-23 14:21:59,510 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:21:59,510 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 5 states. [2018-01-23 14:21:59,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:21:59,621 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2018-01-23 14:21:59,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:21:59,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-01-23 14:21:59,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:21:59,624 INFO L225 Difference]: With dead ends: 96 [2018-01-23 14:21:59,624 INFO L226 Difference]: Without dead ends: 69 [2018-01-23 14:21:59,625 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-23 14:21:59,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-23 14:21:59,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 40. [2018-01-23 14:21:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-23 14:21:59,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2018-01-23 14:21:59,632 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 11 [2018-01-23 14:21:59,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:21:59,632 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2018-01-23 14:21:59,632 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-23 14:21:59,632 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2018-01-23 14:21:59,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-23 14:21:59,633 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:59,633 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:21:59,633 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-23 14:21:59,633 INFO L82 PathProgramCache]: Analyzing trace with hash -661766135, now seen corresponding path program 1 times [2018-01-23 14:21:59,633 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:59,634 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:59,634 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:59,635 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:59,635 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:21:59,644 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:21:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:21:59,661 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:21:59,661 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:21:59,661 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-23 14:21:59,661 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-23 14:21:59,662 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-23 14:21:59,662 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 3 states. [2018-01-23 14:21:59,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:21:59,682 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2018-01-23 14:21:59,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-23 14:21:59,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-01-23 14:21:59,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:21:59,684 INFO L225 Difference]: With dead ends: 42 [2018-01-23 14:21:59,684 INFO L226 Difference]: Without dead ends: 40 [2018-01-23 14:21:59,684 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 [2018-01-23 14:21:59,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-23 14:21:59,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2018-01-23 14:21:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-23 14:21:59,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2018-01-23 14:21:59,689 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 11 [2018-01-23 14:21:59,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:21:59,690 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2018-01-23 14:21:59,690 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-23 14:21:59,690 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2018-01-23 14:21:59,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-23 14:21:59,691 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:59,691 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] [2018-01-23 14:21:59,691 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-23 14:21:59,692 INFO L82 PathProgramCache]: Analyzing trace with hash -27267444, now seen corresponding path program 1 times [2018-01-23 14:21:59,692 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:59,692 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:59,693 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:59,693 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:59,693 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:21:59,721 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:21:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:21:59,991 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:21:59,991 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-23 14:21:59,992 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-23 14:21:59,992 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-23 14:21:59,992 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-01-23 14:21:59,992 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 9 states. [2018-01-23 14:22:00,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:00,211 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2018-01-23 14:22:00,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-23 14:22:00,211 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-01-23 14:22:00,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:00,212 INFO L225 Difference]: With dead ends: 37 [2018-01-23 14:22:00,212 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:22:00,212 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-01-23 14:22:00,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:22:00,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:22:00,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:22:00,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:22:00,214 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2018-01-23 14:22:00,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:00,214 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:22:00,214 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-23 14:22:00,214 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:22:00,214 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:22:00,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.01 02:22:00 BoogieIcfgContainer [2018-01-23 14:22:00,217 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-23 14:22:00,219 INFO L168 Benchmark]: Toolchain (without parser) took 2071.04 ms. Allocated memory was 308.3 MB in the beginning and 469.2 MB in the end (delta: 161.0 MB). Free memory was 266.6 MB in the beginning and 326.5 MB in the end (delta: -59.9 MB). Peak memory consumption was 101.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:22:00,220 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 308.3 MB. Free memory is still 272.6 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 14:22:00,220 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.00 ms. Allocated memory is still 308.3 MB. Free memory was 265.6 MB in the beginning and 255.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 5.3 GB. [2018-01-23 14:22:00,221 INFO L168 Benchmark]: Boogie Preprocessor took 44.43 ms. Allocated memory is still 308.3 MB. Free memory was 255.4 MB in the beginning and 253.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:22:00,221 INFO L168 Benchmark]: RCFGBuilder took 267.42 ms. Allocated memory is still 308.3 MB. Free memory was 253.4 MB in the beginning and 236.8 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 5.3 GB. [2018-01-23 14:22:00,222 INFO L168 Benchmark]: TraceAbstraction took 1508.31 ms. Allocated memory was 308.3 MB in the beginning and 469.2 MB in the end (delta: 161.0 MB). Free memory was 236.8 MB in the beginning and 326.5 MB in the end (delta: -89.7 MB). Peak memory consumption was 71.3 MB. Max. memory is 5.3 GB. [2018-01-23 14:22:00,224 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 308.3 MB. Free memory is still 272.6 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 243.00 ms. Allocated memory is still 308.3 MB. Free memory was 265.6 MB in the beginning and 255.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 44.43 ms. Allocated memory is still 308.3 MB. Free memory was 255.4 MB in the beginning and 253.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 267.42 ms. Allocated memory is still 308.3 MB. Free memory was 253.4 MB in the beginning and 236.8 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1508.31 ms. Allocated memory was 308.3 MB in the beginning and 469.2 MB in the end (delta: 161.0 MB). Free memory was 236.8 MB in the beginning and 326.5 MB in the end (delta: -89.7 MB). Peak memory consumption was 71.3 MB. 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) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 43 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 540]: 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: cstrcatErr0EnsuresViolation CFG has 4 procedures, 43 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 47 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 441 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: [L549] int length1 = __VERIFIER_nondet_int(); [L550] int length2 = __VERIFIER_nondet_int(); [L551] int length3 = __VERIFIER_nondet_int(); [L552] COND TRUE length1 < 1 [L553] length1 = 1 VAL [length1=1, length2=0, length3=3] [L555] COND TRUE length2 < 2 [L556] length2 = 2 VAL [length1=1, length2=2, length3=3] [L558] COND FALSE !(length3 < 1) VAL [length1=1, length2=2, length3=3] [L561] COND TRUE length2 - length3 < length1 || length3 > length2 [L561] return 0; - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 43 locations, 4 error locations. UNSAFE Result, 0.3s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 51 SDtfs, 64 SDslu, 114 SDs, 0 SdLazy, 36 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 29 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 384 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: 548]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 43 locations, 4 error locations. SAFE Result, 0.7s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 116 SDtfs, 115 SDslu, 166 SDs, 0 SdLazy, 199 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 32 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 8034 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/openbsd_cstrcat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-23_14-22-00-233.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrcat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-23_14-22-00-233.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrcat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-23_14-22-00-233.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrcat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-23_14-22-00-233.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrcat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-23_14-22-00-233.csv Received shutdown request...