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.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrcspn-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-20 23:25:38,982 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 23:25:38,983 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 23:25:38,995 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 23:25:38,995 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 23:25:38,996 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 23:25:38,997 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 23:25:38,998 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 23:25:39,000 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 23:25:39,000 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 23:25:39,001 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-20 23:25:39,001 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-20 23:25:39,002 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-20 23:25:39,003 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-20 23:25:39,004 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-20 23:25:39,006 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-20 23:25:39,008 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-20 23:25:39,010 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-20 23:25:39,012 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-20 23:25:39,013 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-20 23:25:39,015 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-20 23:25:39,021 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.epf [2018-01-20 23:25:39,030 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 23:25:39,030 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 23:25:39,031 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 23:25:39,031 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 23:25:39,031 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 23:25:39,031 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 23:25:39,032 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 23:25:39,032 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 23:25:39,032 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 23:25:39,033 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 23:25:39,033 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 23:25:39,033 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 23:25:39,033 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 23:25:39,033 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 23:25:39,034 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 23:25:39,034 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 23:25:39,034 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 23:25:39,034 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 23:25:39,034 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 23:25:39,035 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 23:25:39,035 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 23:25:39,035 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 23:25:39,035 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 23:25:39,035 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 23:25:39,036 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 23:25:39,036 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 23:25:39,036 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 23:25:39,036 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 23:25:39,036 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 23:25:39,037 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 23:25:39,037 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 23:25:39,037 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-20 23:25:39,037 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 23:25:39,037 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 23:25:39,038 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 23:25:39,038 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-20 23:25:39,039 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 23:25:39,039 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 23:25:39,073 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 23:25:39,085 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 23:25:39,089 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 23:25:39,090 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 23:25:39,091 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 23:25:39,091 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrcspn-alloca_true-valid-memsafety_true-termination.i [2018-01-20 23:25:39,250 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 23:25:39,255 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 23:25:39,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 23:25:39,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 23:25:39,260 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 23:25:39,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:25:39" (1/1) ... [2018-01-20 23:25:39,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@655b3dab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:39, skipping insertion in model container [2018-01-20 23:25:39,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:25:39" (1/1) ... [2018-01-20 23:25:39,280 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:25:39,320 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:25:39,436 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:25:39,458 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:25:39,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:39 WrapperNode [2018-01-20 23:25:39,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 23:25:39,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 23:25:39,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 23:25:39,464 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 23:25:39,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:39" (1/1) ... [2018-01-20 23:25:39,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:39" (1/1) ... [2018-01-20 23:25:39,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:39" (1/1) ... [2018-01-20 23:25:39,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:39" (1/1) ... [2018-01-20 23:25:39,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:39" (1/1) ... [2018-01-20 23:25:39,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:39" (1/1) ... [2018-01-20 23:25:39,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:39" (1/1) ... [2018-01-20 23:25:39,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 23:25:39,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 23:25:39,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 23:25:39,500 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 23:25:39,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:39" (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 [2018-01-20 23:25:39,556 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 23:25:39,556 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 23:25:39,556 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrcspn [2018-01-20 23:25:39,556 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 23:25:39,556 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-20 23:25:39,557 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-20 23:25:39,557 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 23:25:39,557 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 23:25:39,557 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 23:25:39,557 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-20 23:25:39,557 INFO L128 BoogieDeclarations]: Found specification of procedure cstrcspn [2018-01-20 23:25:39,557 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 23:25:39,557 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 23:25:39,558 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 23:25:39,738 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 23:25:39,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:25:39 BoogieIcfgContainer [2018-01-20 23:25:39,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 23:25:39,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 23:25:39,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 23:25:39,742 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 23:25:39,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 11:25:39" (1/3) ... [2018-01-20 23:25:39,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646185e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:25:39, skipping insertion in model container [2018-01-20 23:25:39,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:39" (2/3) ... [2018-01-20 23:25:39,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646185e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:25:39, skipping insertion in model container [2018-01-20 23:25:39,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:25:39" (3/3) ... [2018-01-20 23:25:39,746 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcspn-alloca_true-valid-memsafety_true-termination.i [2018-01-20 23:25:39,754 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 23:25:39,761 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-20 23:25:39,801 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:25:39,801 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:25:39,801 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:25:39,801 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:25:39,801 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:25:39,802 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:25:39,802 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:25:39,802 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-20 23:25:39,802 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:25:39,819 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-20 23:25:39,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-20 23:25:39,824 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:25:39,825 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-20 23:25:39,825 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-20 23:25:39,829 INFO L82 PathProgramCache]: Analyzing trace with hash 97063, now seen corresponding path program 1 times [2018-01-20 23:25:39,831 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:25:39,869 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:39,869 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:25:39,869 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:39,870 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:25:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:25:39,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:25:39,923 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 23:25:39,928 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:25:39,934 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:25:39,934 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:25:39,934 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:25:39,934 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:25:39,935 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:25:39,935 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:25:39,935 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:25:39,935 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrcspnErr0EnsuresViolation======== [2018-01-20 23:25:39,935 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:25:39,937 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-20 23:25:39,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-20 23:25:39,938 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:25:39,938 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:25:39,938 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrcspnErr0EnsuresViolation]=== [2018-01-20 23:25:39,938 INFO L82 PathProgramCache]: Analyzing trace with hash 945947687, now seen corresponding path program 1 times [2018-01-20 23:25:39,939 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:25:39,939 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:39,940 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:25:39,940 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:39,940 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:25:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:25:39,977 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:25:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:25:40,026 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:25:40,026 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:25:40,026 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:25:40,028 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:25:40,038 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:25:40,038 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:25:40,040 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-01-20 23:25:40,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:25:40,128 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2018-01-20 23:25:40,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:25:40,130 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-01-20 23:25:40,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:25:40,137 INFO L225 Difference]: With dead ends: 62 [2018-01-20 23:25:40,137 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 23:25:40,139 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 [2018-01-20 23:25:40,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 23:25:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 23:25:40,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 23:25:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 23:25:40,157 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-01-20 23:25:40,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:25:40,158 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 23:25:40,158 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:25:40,158 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 23:25:40,158 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 23:25:40,161 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:25:40,161 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:25:40,161 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:25:40,161 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:25:40,161 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:25:40,161 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:25:40,161 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:25:40,161 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-20 23:25:40,162 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:25:40,163 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-20 23:25:40,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-20 23:25:40,165 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:25:40,165 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] [2018-01-20 23:25:40,165 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:25:40,166 INFO L82 PathProgramCache]: Analyzing trace with hash 725300169, now seen corresponding path program 1 times [2018-01-20 23:25:40,166 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:25:40,167 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:40,167 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:25:40,167 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:40,167 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:25:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:25:40,186 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:25:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:25:40,213 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:25:40,213 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:25:40,213 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:25:40,214 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:25:40,214 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:25:40,214 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:25:40,215 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-01-20 23:25:40,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:25:40,220 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2018-01-20 23:25:40,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:25:40,220 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2018-01-20 23:25:40,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:25:40,223 INFO L225 Difference]: With dead ends: 62 [2018-01-20 23:25:40,224 INFO L226 Difference]: Without dead ends: 36 [2018-01-20 23:25:40,224 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 [2018-01-20 23:25:40,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-20 23:25:40,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-20 23:25:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-20 23:25:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2018-01-20 23:25:40,236 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 27 [2018-01-20 23:25:40,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:25:40,236 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2018-01-20 23:25:40,236 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:25:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2018-01-20 23:25:40,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-20 23:25:40,237 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:25:40,237 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] [2018-01-20 23:25:40,237 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:25:40,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1576766648, now seen corresponding path program 1 times [2018-01-20 23:25:40,238 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:25:40,238 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:40,239 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:25:40,239 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:40,239 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:25:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:25:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:25:40,315 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 23:25:40,324 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:25:40,329 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:25:40,331 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:25:40,332 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:25:40,340 WARN L312 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2018-01-20 23:25:40,344 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:25:40,344 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:25:40,345 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:25:40,345 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:25:40,345 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:25:40,345 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:25:40,345 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:25:40,345 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-20 23:25:40,345 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:25:40,346 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-20 23:25:40,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-20 23:25:40,347 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:25:40,347 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] [2018-01-20 23:25:40,347 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-20 23:25:40,347 INFO L82 PathProgramCache]: Analyzing trace with hash -736674615, now seen corresponding path program 1 times [2018-01-20 23:25:40,347 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:25:40,348 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:40,348 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:25:40,348 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:40,348 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:25:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:25:40,361 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:25:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:25:40,379 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:25:40,379 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:25:40,379 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:25:40,379 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:25:40,380 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:25:40,380 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:25:40,380 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-01-20 23:25:40,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:25:40,384 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2018-01-20 23:25:40,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:25:40,385 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2018-01-20 23:25:40,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:25:40,386 INFO L225 Difference]: With dead ends: 62 [2018-01-20 23:25:40,386 INFO L226 Difference]: Without dead ends: 34 [2018-01-20 23:25:40,387 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 [2018-01-20 23:25:40,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-01-20 23:25:40,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-01-20 23:25:40,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-01-20 23:25:40,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2018-01-20 23:25:40,392 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2018-01-20 23:25:40,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:25:40,392 INFO L432 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2018-01-20 23:25:40,392 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:25:40,392 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2018-01-20 23:25:40,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-20 23:25:40,393 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:25:40,394 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] [2018-01-20 23:25:40,394 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-20 23:25:40,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1415117448, now seen corresponding path program 1 times [2018-01-20 23:25:40,394 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:25:40,395 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:40,395 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:25:40,395 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:40,396 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:25:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:25:40,416 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:25:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:25:40,759 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:25:40,801 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-20 23:25:40,802 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:25:40,802 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-20 23:25:40,802 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-20 23:25:40,802 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-01-20 23:25:40,803 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 9 states. [2018-01-20 23:25:41,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:25:41,039 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2018-01-20 23:25:41,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-20 23:25:41,040 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2018-01-20 23:25:41,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:25:41,040 INFO L225 Difference]: With dead ends: 34 [2018-01-20 23:25:41,040 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 23:25:41,041 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-01-20 23:25:41,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 23:25:41,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 23:25:41,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 23:25:41,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 23:25:41,042 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2018-01-20 23:25:41,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:25:41,042 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 23:25:41,042 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-20 23:25:41,042 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 23:25:41,042 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 23:25:41,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 11:25:41 BoogieIcfgContainer [2018-01-20 23:25:41,044 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-20 23:25:41,045 INFO L168 Benchmark]: Toolchain (without parser) took 1794.68 ms. Allocated memory was 298.3 MB in the beginning and 452.5 MB in the end (delta: 154.1 MB). Free memory was 257.2 MB in the beginning and 338.5 MB in the end (delta: -81.3 MB). Peak memory consumption was 72.9 MB. Max. memory is 5.3 GB. [2018-01-20 23:25:41,046 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 298.3 MB. Free memory is still 263.2 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-20 23:25:41,046 INFO L168 Benchmark]: CACSL2BoogieTranslator took 207.76 ms. Allocated memory is still 298.3 MB. Free memory was 257.2 MB in the beginning and 247.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-20 23:25:41,046 INFO L168 Benchmark]: Boogie Preprocessor took 35.59 ms. Allocated memory is still 298.3 MB. Free memory was 247.3 MB in the beginning and 245.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-20 23:25:41,047 INFO L168 Benchmark]: RCFGBuilder took 239.06 ms. Allocated memory is still 298.3 MB. Free memory was 245.3 MB in the beginning and 228.3 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 5.3 GB. [2018-01-20 23:25:41,047 INFO L168 Benchmark]: TraceAbstraction took 1305.14 ms. Allocated memory was 298.3 MB in the beginning and 452.5 MB in the end (delta: 154.1 MB). Free memory was 228.3 MB in the beginning and 338.5 MB in the end (delta: -110.2 MB). Peak memory consumption was 44.0 MB. Max. memory is 5.3 GB. [2018-01-20 23:25:41,049 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 298.3 MB. Free memory is still 263.2 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 207.76 ms. Allocated memory is still 298.3 MB. Free memory was 257.2 MB in the beginning and 247.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 35.59 ms. Allocated memory is still 298.3 MB. Free memory was 247.3 MB in the beginning and 245.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 239.06 ms. Allocated memory is still 298.3 MB. Free memory was 245.3 MB in the beginning and 228.3 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1305.14 ms. Allocated memory was 298.3 MB in the beginning and 452.5 MB in the end (delta: 154.1 MB). Free memory was 228.3 MB in the beginning and 338.5 MB in the end (delta: -110.2 MB). Peak memory consumption was 44.0 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) - 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, 40 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=40occurred 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: cstrcspnErr0EnsuresViolation CFG has 4 procedures, 40 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 42 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=40occurred 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, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 289 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: [L555] int length1 = __VERIFIER_nondet_int(); [L556] int length2 = __VERIFIER_nondet_int(); [L557] COND FALSE !(length1 < 1) VAL [length1=3, length2=0] [L560] COND TRUE length2 < 1 [L561] length2 = 1 VAL [length1=3, length2=1] [L563] EXPR, FCALL __builtin_alloca (length1 * sizeof(char)) VAL [__builtin_alloca (length1 * sizeof(char))={5:0}, length1=3, length2=1] [L563] char* nondetString1 = (char*) __builtin_alloca (length1 * sizeof(char)); VAL [__builtin_alloca (length1 * sizeof(char))={5:0}, length1=3, length2=1, nondetString1={5:0}] [L564] EXPR, FCALL __builtin_alloca (length2 * sizeof(char)) VAL [__builtin_alloca (length1 * sizeof(char))={5:0}, __builtin_alloca (length2 * sizeof(char))={7:0}, length1=3, length2=1, nondetString1={5:0}] [L564] char* nondetString2 = (char*) __builtin_alloca (length2 * sizeof(char)); VAL [__builtin_alloca (length1 * sizeof(char))={5:0}, __builtin_alloca (length2 * sizeof(char))={7:0}, length1=3, length2=1, nondetString1={5:0}, nondetString2={7:0}] [L565] FCALL nondetString1[length1-1] = '\0' VAL [__builtin_alloca (length1 * sizeof(char))={5:0}, __builtin_alloca (length2 * sizeof(char))={7:0}, length1=3, length2=1, nondetString1={5:0}, nondetString2={7:0}] [L566] FCALL nondetString2[length2-1] = '\0' VAL [__builtin_alloca (length1 * sizeof(char))={5:0}, __builtin_alloca (length2 * sizeof(char))={7:0}, length1=3, length2=1, nondetString1={5:0}, nondetString2={7:0}] [L567] CALL, EXPR cstrcspn(nondetString1,nondetString2) VAL [s1={5:0}, s2={7:0}] [L543] const char *p, *spanp; [L544] char c, sc; [L545] p = s1 VAL [p={5:0}, s1={5:0}, s1={5:0}, s2={7:0}, s2={7:0}] [L546] EXPR p++ VAL [p={5:1}, p++=0, p++={5:0}, s1={5:0}, s1={5:0}, s2={7:0}, s2={7:0}] [L546] c = *p++ [L547] spanp = s2 VAL [c=0, p={5:1}, p={7:0}, s1={5:0}, s1={5:0}, s2={7:0}, s2={7:0}] [L549] EXPR spanp++ VAL [c=0, p={7:1}, p={5:1}, s1={5:0}, s1={5:0}, s2={7:0}, s2={7:0}, spanp++=0spanp++={7:0}] [L549] EXPR sc = *spanp++ VAL [c=0, c=0, p={5:1}, p={7:1}, s1={5:0}, s1={5:0}, s2={7:0}, s2={7:0}, spanp++={7:0}spanp++=0] [L549] COND TRUE (sc = *spanp++) == c [L550] RET return (p - 1 - s1); VAL [\result=0, c=0, c=0, p={7:1}, p={5:1}, s1={5:0}, s1={5:0}, s2={7:0}, s2={7:0}] [L567] EXPR cstrcspn(nondetString1,nondetString2) VAL [__builtin_alloca (length1 * sizeof(char))={5:0}, __builtin_alloca (length2 * sizeof(char))={7:0}, cstrcspn(nondetString1,nondetString2)=0, length1=3, length2=1, nondetString1={5:0}, nondetString2={7:0}] [L567] return cstrcspn(nondetString1,nondetString2); - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 40 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 42 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=40occurred 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, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 676 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: 554]: 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, 40 locations, 4 error locations. SAFE Result, 0.6s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 68 SDtfs, 21 SDslu, 30 SDs, 0 SdLazy, 148 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 7210 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-20_23-25-41-057.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-20_23-25-41-057.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-20_23-25-41-057.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-20_23-25-41-057.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-20_23-25-41-057.csv Received shutdown request...