java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrcspn-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 00:29:47,539 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 00:29:47,541 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 00:29:47,556 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 00:29:47,556 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 00:29:47,557 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 00:29:47,559 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 00:29:47,560 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 00:29:47,562 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 00:29:47,563 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 00:29:47,564 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 00:29:47,564 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 00:29:47,565 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 00:29:47,567 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 00:29:47,568 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 00:29:47,570 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 00:29:47,573 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 00:29:47,575 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 00:29:47,576 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 00:29:47,577 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 00:29:47,580 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 00:29:47,585 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 00:29:47,586 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 00:29:47,586 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf [2018-01-21 00:29:47,596 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 00:29:47,596 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 00:29:47,597 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 00:29:47,598 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 00:29:47,598 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 00:29:47,598 INFO L133 SettingsManager]: * Deactivate Weak Equivalences=true [2018-01-21 00:29:47,598 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 00:29:47,598 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 00:29:47,599 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 00:29:47,599 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 00:29:47,600 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 00:29:47,600 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 00:29:47,600 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 00:29:47,600 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 00:29:47,600 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 00:29:47,600 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 00:29:47,601 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 00:29:47,601 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 00:29:47,601 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 00:29:47,601 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 00:29:47,601 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 00:29:47,602 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 00:29:47,602 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 00:29:47,602 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 00:29:47,602 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 00:29:47,603 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 00:29:47,603 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 00:29:47,603 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 00:29:47,603 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 00:29:47,603 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 00:29:47,604 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 00:29:47,604 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 00:29:47,604 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 00:29:47,604 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 00:29:47,604 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 00:29:47,605 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 00:29:47,605 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 00:29:47,606 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 00:29:47,606 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 00:29:47,642 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 00:29:47,655 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 00:29:47,659 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 00:29:47,661 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 00:29:47,662 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 00:29:47,662 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrcspn-alloca_true-valid-memsafety_true-termination.i [2018-01-21 00:29:47,852 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 00:29:47,857 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 00:29:47,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 00:29:47,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 00:29:47,863 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 00:29:47,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:29:47" (1/1) ... [2018-01-21 00:29:47,866 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 21.01 12:29:47, skipping insertion in model container [2018-01-21 00:29:47,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:29:47" (1/1) ... [2018-01-21 00:29:47,879 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:29:47,917 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:29:48,036 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:29:48,052 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:29:48,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:29:48 WrapperNode [2018-01-21 00:29:48,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 00:29:48,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 00:29:48,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 00:29:48,062 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 00:29:48,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:29:48" (1/1) ... [2018-01-21 00:29:48,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:29:48" (1/1) ... [2018-01-21 00:29:48,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:29:48" (1/1) ... [2018-01-21 00:29:48,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:29:48" (1/1) ... [2018-01-21 00:29:48,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:29:48" (1/1) ... [2018-01-21 00:29:48,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:29:48" (1/1) ... [2018-01-21 00:29:48,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:29:48" (1/1) ... [2018-01-21 00:29:48,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 00:29:48,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 00:29:48,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 00:29:48,098 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 00:29:48,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:29:48" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 00:29:48,145 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 00:29:48,146 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 00:29:48,146 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrcspn [2018-01-21 00:29:48,146 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 00:29:48,146 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 00:29:48,146 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 00:29:48,146 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 00:29:48,146 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 00:29:48,147 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 00:29:48,147 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 00:29:48,147 INFO L128 BoogieDeclarations]: Found specification of procedure cstrcspn [2018-01-21 00:29:48,147 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 00:29:48,147 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 00:29:48,147 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 00:29:48,338 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 00:29:48,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:29:48 BoogieIcfgContainer [2018-01-21 00:29:48,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 00:29:48,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 00:29:48,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 00:29:48,341 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 00:29:48,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 12:29:47" (1/3) ... [2018-01-21 00:29:48,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf7b32b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:29:48, skipping insertion in model container [2018-01-21 00:29:48,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:29:48" (2/3) ... [2018-01-21 00:29:48,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf7b32b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:29:48, skipping insertion in model container [2018-01-21 00:29:48,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:29:48" (3/3) ... [2018-01-21 00:29:48,344 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrcspn-alloca_true-valid-memsafety_true-termination.i [2018-01-21 00:29:48,350 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 00:29:48,356 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 00:29:48,405 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:29:48,406 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:29:48,406 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:29:48,406 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:29:48,406 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:29:48,406 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:29:48,406 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:29:48,407 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 00:29:48,407 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:29:48,427 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-21 00:29:48,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 00:29:48,434 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:29:48,435 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 00:29:48,435 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 00:29:48,440 INFO L82 PathProgramCache]: Analyzing trace with hash 109556, now seen corresponding path program 1 times [2018-01-21 00:29:48,443 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:29:48,493 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:29:48,494 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:29:48,494 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:29:48,494 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:29:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:29:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:29:48,546 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:29:48,553 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:29:48,559 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:29:48,559 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:29:48,559 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:29:48,559 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:29:48,559 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:29:48,559 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:29:48,560 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:29:48,560 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrcspnErr0EnsuresViolation======== [2018-01-21 00:29:48,560 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:29:48,562 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-21 00:29:48,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 00:29:48,563 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:29:48,563 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:29:48,563 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrcspnErr0EnsuresViolation]=== [2018-01-21 00:29:48,564 INFO L82 PathProgramCache]: Analyzing trace with hash -237753640, now seen corresponding path program 1 times [2018-01-21 00:29:48,564 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:29:48,565 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:29:48,565 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:29:48,565 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:29:48,565 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:29:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:29:48,603 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:29:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:29:48,653 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:29:48,653 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:29:48,653 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:29:48,656 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:29:48,670 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:29:48,671 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:29:48,674 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2018-01-21 00:29:48,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:29:48,770 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2018-01-21 00:29:48,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:29:48,772 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-01-21 00:29:48,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:29:48,779 INFO L225 Difference]: With dead ends: 76 [2018-01-21 00:29:48,780 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 00:29:48,783 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:29:48,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 00:29:48,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 00:29:48,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 00:29:48,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 00:29:48,810 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2018-01-21 00:29:48,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:29:48,810 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 00:29:48,810 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:29:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 00:29:48,810 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 00:29:48,812 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:29:48,813 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:29:48,813 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:29:48,813 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:29:48,813 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:29:48,813 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:29:48,813 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:29:48,813 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 00:29:48,813 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:29:48,814 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-21 00:29:48,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 00:29:48,816 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:29:48,816 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:29:48,816 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:29:48,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1411464645, now seen corresponding path program 1 times [2018-01-21 00:29:48,816 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:29:48,817 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:29:48,817 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:29:48,817 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:29:48,817 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:29:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:29:48,836 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:29:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:29:48,863 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:29:48,863 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:29:48,863 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:29:48,863 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:29:48,863 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:29:48,864 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:29:48,864 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2018-01-21 00:29:48,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:29:48,868 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2018-01-21 00:29:48,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:29:48,868 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 28 [2018-01-21 00:29:48,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:29:48,871 INFO L225 Difference]: With dead ends: 76 [2018-01-21 00:29:48,871 INFO L226 Difference]: Without dead ends: 43 [2018-01-21 00:29:48,872 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:29:48,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-21 00:29:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-21 00:29:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-21 00:29:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2018-01-21 00:29:48,884 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 28 [2018-01-21 00:29:48,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:29:48,885 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2018-01-21 00:29:48,885 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:29:48,885 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2018-01-21 00:29:48,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-21 00:29:48,886 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:29:48,886 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:29:48,886 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:29:48,886 INFO L82 PathProgramCache]: Analyzing trace with hash -895340150, now seen corresponding path program 1 times [2018-01-21 00:29:48,886 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:29:48,887 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:29:48,887 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:29:48,887 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:29:48,888 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:29:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:29:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:29:48,945 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:29:48,953 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:29:48,956 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:29:48,957 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:29:48,957 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:29:48,968 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:29:48,969 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:29:48,969 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:29:48,969 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:29:48,969 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:29:48,969 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:29:48,969 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:29:48,969 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 00:29:48,969 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:29:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-21 00:29:48,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-21 00:29:48,972 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:29:48,972 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:29:48,973 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 00:29:48,973 INFO L82 PathProgramCache]: Analyzing trace with hash -61101019, now seen corresponding path program 1 times [2018-01-21 00:29:48,973 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:29:48,974 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:29:48,974 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:29:48,974 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:29:48,974 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:29:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:29:48,986 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:29:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:29:49,008 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:29:49,008 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:29:49,008 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:29:49,009 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:29:49,009 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:29:49,009 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:29:49,009 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2018-01-21 00:29:49,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:29:49,015 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2018-01-21 00:29:49,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:29:49,015 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2018-01-21 00:29:49,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:29:49,016 INFO L225 Difference]: With dead ends: 76 [2018-01-21 00:29:49,016 INFO L226 Difference]: Without dead ends: 41 [2018-01-21 00:29:49,017 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:29:49,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-21 00:29:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-21 00:29:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-21 00:29:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2018-01-21 00:29:49,024 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2018-01-21 00:29:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:29:49,024 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2018-01-21 00:29:49,024 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:29:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2018-01-21 00:29:49,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 00:29:49,025 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:29:49,026 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:29:49,026 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 00:29:49,026 INFO L82 PathProgramCache]: Analyzing trace with hash 799067434, now seen corresponding path program 1 times [2018-01-21 00:29:49,026 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:29:49,027 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:29:49,027 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:29:49,027 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:29:49,028 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:29:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:29:49,045 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:29:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:29:49,408 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:29:49,409 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-21 00:29:49,409 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:29:49,409 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-21 00:29:49,410 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-21 00:29:49,410 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-01-21 00:29:49,410 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 9 states. [2018-01-21 00:29:49,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:29:49,697 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2018-01-21 00:29:49,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-21 00:29:49,697 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-01-21 00:29:49,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:29:49,698 INFO L225 Difference]: With dead ends: 41 [2018-01-21 00:29:49,698 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 00:29:49,699 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-01-21 00:29:49,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 00:29:49,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 00:29:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 00:29:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 00:29:49,700 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2018-01-21 00:29:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:29:49,700 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 00:29:49,700 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-21 00:29:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 00:29:49,700 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 00:29:49,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 12:29:49 BoogieIcfgContainer [2018-01-21 00:29:49,703 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 00:29:49,704 INFO L168 Benchmark]: Toolchain (without parser) took 1850.98 ms. Allocated memory was 305.7 MB in the beginning and 466.1 MB in the end (delta: 160.4 MB). Free memory was 264.6 MB in the beginning and 352.0 MB in the end (delta: -87.4 MB). Peak memory consumption was 73.0 MB. Max. memory is 5.3 GB. [2018-01-21 00:29:49,705 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 305.7 MB. Free memory is still 270.6 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 00:29:49,705 INFO L168 Benchmark]: CACSL2BoogieTranslator took 202.83 ms. Allocated memory is still 305.7 MB. Free memory was 264.6 MB in the beginning and 254.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-21 00:29:49,705 INFO L168 Benchmark]: Boogie Preprocessor took 36.28 ms. Allocated memory is still 305.7 MB. Free memory was 254.6 MB in the beginning and 252.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 00:29:49,706 INFO L168 Benchmark]: RCFGBuilder took 240.62 ms. Allocated memory is still 305.7 MB. Free memory was 252.6 MB in the beginning and 233.7 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 5.3 GB. [2018-01-21 00:29:49,706 INFO L168 Benchmark]: TraceAbstraction took 1364.33 ms. Allocated memory was 305.7 MB in the beginning and 466.1 MB in the end (delta: 160.4 MB). Free memory was 233.7 MB in the beginning and 352.0 MB in the end (delta: -118.3 MB). Peak memory consumption was 42.1 MB. Max. memory is 5.3 GB. [2018-01-21 00:29:49,707 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 305.7 MB. Free memory is still 270.6 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 202.83 ms. Allocated memory is still 305.7 MB. Free memory was 264.6 MB in the beginning and 254.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 36.28 ms. Allocated memory is still 305.7 MB. Free memory was 254.6 MB in the beginning and 252.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 240.62 ms. Allocated memory is still 305.7 MB. Free memory was 252.6 MB in the beginning and 233.7 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1364.33 ms. Allocated memory was 305.7 MB in the beginning and 466.1 MB in the end (delta: 160.4 MB). Free memory was 233.7 MB in the beginning and 352.0 MB in the end (delta: -118.3 MB). Peak memory consumption was 42.1 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, 47 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=47occurred 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, 47 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 51 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=47occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 324 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L556] int length1 = __VERIFIER_nondet_int(); [L557] int length2 = __VERIFIER_nondet_int(); [L558] COND TRUE length1 < 1 [L559] length1 = 1 VAL [length1=1, length2=0] [L561] COND TRUE length2 < 1 [L562] length2 = 1 VAL [length1=1, length2=1] [L564] EXPR, FCALL __builtin_alloca (length1 * sizeof(char)) VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, length1=1, length2=1] [L564] char* nondetString1 = (char*) __builtin_alloca (length1 * sizeof(char)); VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, length1=1, length2=1, nondetString1={3:0}] [L565] EXPR, FCALL __builtin_alloca (length2 * sizeof(char)) VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, __builtin_alloca (length2 * sizeof(char))={4:0}, length1=1, length2=1, nondetString1={3:0}] [L565] char* nondetString2 = (char*) __builtin_alloca (length2 * sizeof(char)); VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, __builtin_alloca (length2 * sizeof(char))={4:0}, length1=1, length2=1, nondetString1={3:0}, nondetString2={4:0}] [L566] FCALL nondetString1[length1-1] = '\0' VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, __builtin_alloca (length2 * sizeof(char))={4:0}, length1=1, length2=1, nondetString1={3:0}, nondetString2={4:0}] [L567] FCALL nondetString2[length2-1] = '\0' VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, __builtin_alloca (length2 * sizeof(char))={4:0}, length1=1, length2=1, nondetString1={3:0}, nondetString2={4:0}] [L568] CALL, EXPR cstrcspn(nondetString1,nondetString2) VAL [s1={3:0}, s2={4:0}] [L542] const char *sc1; [L543] const char *s; [L544] int c; [L545] sc1 = s1 VAL [s1={3:0}, s1={3:0}, s2={4:0}, s2={4:0}, sc1={3:0}] [L545] EXPR, FCALL \read(*sc1) VAL [\read(*sc1)=0, s1={3:0}, s1={3:0}, s2={4:0}, s2={4:0}, sc1={3:0}] [L545] COND FALSE !(*sc1 != '\0') [L553] RET return sc1 - s1; VAL [\result=0, s1={3:0}, s1={3:0}, s2={4:0}, s2={4:0}, sc1={3:0}] [L568] EXPR cstrcspn(nondetString1,nondetString2) VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, __builtin_alloca (length2 * sizeof(char))={4:0}, cstrcspn(nondetString1,nondetString2)=0, length1=1, length2=1, nondetString1={3:0}, nondetString2={4:0}] [L568] return cstrcspn(nondetString1,nondetString2); - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 47 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 51 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=47occurred 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, 58 NumberOfCodeBlocks, 58 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 729 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: 555]: 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, 47 locations, 4 error locations. SAFE Result, 0.7s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 86 SDtfs, 30 SDslu, 30 SDs, 0 SdLazy, 193 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, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred 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, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 6295 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/cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_00-29-49-717.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_00-29-49-717.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_00-29-49-717.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_00-29-49-717.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_00-29-49-717.csv Received shutdown request...