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/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrlen_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c17473d-m [2018-02-04 11:59:15,920 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-04 11:59:15,922 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-04 11:59:15,932 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-04 11:59:15,932 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-04 11:59:15,933 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-04 11:59:15,933 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-04 11:59:15,935 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-04 11:59:15,936 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-04 11:59:15,937 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-04 11:59:15,938 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-04 11:59:15,938 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-04 11:59:15,939 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-04 11:59:15,940 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-04 11:59:15,940 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-04 11:59:15,942 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-04 11:59:15,944 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-04 11:59:15,945 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-04 11:59:15,946 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-04 11:59:15,947 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-04 11:59:15,949 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-02-04 11:59:15,949 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-02-04 11:59:15,950 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-02-04 11:59:15,951 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-02-04 11:59:15,951 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-02-04 11:59:15,952 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-02-04 11:59:15,953 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-02-04 11:59:15,953 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-02-04 11:59:15,953 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-02-04 11:59:15,954 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-04 11:59:15,954 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-04 11:59:15,954 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf [2018-02-04 11:59:15,964 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-04 11:59:15,964 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-04 11:59:15,966 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-04 11:59:15,966 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-04 11:59:15,966 INFO L133 SettingsManager]: * Use SBE=true [2018-02-04 11:59:15,966 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-04 11:59:15,966 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-04 11:59:15,966 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-04 11:59:15,967 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-04 11:59:15,967 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-04 11:59:15,967 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-04 11:59:15,967 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-04 11:59:15,967 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-04 11:59:15,967 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-04 11:59:15,968 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-04 11:59:15,968 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-04 11:59:15,968 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-04 11:59:15,968 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-04 11:59:15,968 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-04 11:59:15,968 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-04 11:59:15,968 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-04 11:59:15,969 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-04 11:59:15,969 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-04 11:59:15,969 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-02-04 11:59:15,999 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-04 11:59:16,011 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-04 11:59:16,014 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-04 11:59:16,015 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-04 11:59:16,016 INFO L276 PluginConnector]: CDTParser initialized [2018-02-04 11:59:16,016 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrlen_unsafe_false-valid-deref.i [2018-02-04 11:59:16,150 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-04 11:59:16,151 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-04 11:59:16,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-04 11:59:16,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-04 11:59:16,158 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-04 11:59:16,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 11:59:16" (1/1) ... [2018-02-04 11:59:16,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e18e78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 11:59:16, skipping insertion in model container [2018-02-04 11:59:16,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 11:59:16" (1/1) ... [2018-02-04 11:59:16,176 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 11:59:16,205 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 11:59:16,290 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 11:59:16,301 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 11:59:16,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 11:59:16 WrapperNode [2018-02-04 11:59:16,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-04 11:59:16,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-04 11:59:16,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-04 11:59:16,306 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-04 11:59:16,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 11:59:16" (1/1) ... [2018-02-04 11:59:16,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 11:59:16" (1/1) ... [2018-02-04 11:59:16,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 11:59:16" (1/1) ... [2018-02-04 11:59:16,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 11:59:16" (1/1) ... [2018-02-04 11:59:16,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 11:59:16" (1/1) ... [2018-02-04 11:59:16,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 11:59:16" (1/1) ... [2018-02-04 11:59:16,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 11:59:16" (1/1) ... [2018-02-04 11:59:16,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-04 11:59:16,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-04 11:59:16,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-04 11:59:16,334 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-04 11:59:16,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 11:59:16" (1/1) ... No working directory specified, using /home/ultimate/work/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 [2018-02-04 11:59:16,369 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-04 11:59:16,369 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-04 11:59:16,369 INFO L136 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2018-02-04 11:59:16,370 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrlen [2018-02-04 11:59:16,370 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-04 11:59:16,370 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-04 11:59:16,370 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-04 11:59:16,370 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-04 11:59:16,370 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-04 11:59:16,370 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-04 11:59:16,370 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-02-04 11:59:16,370 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-02-04 11:59:16,370 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-04 11:59:16,370 INFO L128 BoogieDeclarations]: Found specification of procedure build_nondet_String [2018-02-04 11:59:16,370 INFO L128 BoogieDeclarations]: Found specification of procedure cstrlen [2018-02-04 11:59:16,371 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-04 11:59:16,371 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-04 11:59:16,371 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-04 11:59:16,496 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-04 11:59:16,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 11:59:16 BoogieIcfgContainer [2018-02-04 11:59:16,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-04 11:59:16,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-04 11:59:16,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-04 11:59:16,499 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-04 11:59:16,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.02 11:59:16" (1/3) ... [2018-02-04 11:59:16,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ec7e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 11:59:16, skipping insertion in model container [2018-02-04 11:59:16,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 11:59:16" (2/3) ... [2018-02-04 11:59:16,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ec7e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 11:59:16, skipping insertion in model container [2018-02-04 11:59:16,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 11:59:16" (3/3) ... [2018-02-04 11:59:16,501 INFO L107 eAbstractionObserver]: Analyzing ICFG cstrlen_unsafe_false-valid-deref.i [2018-02-04 11:59:16,507 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-04 11:59:16,511 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-02-04 11:59:16,546 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-04 11:59:16,547 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-04 11:59:16,547 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-04 11:59:16,547 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-04 11:59:16,547 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-04 11:59:16,547 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-04 11:59:16,549 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-04 11:59:16,549 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-04 11:59:16,550 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-04 11:59:16,561 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2018-02-04 11:59:16,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-02-04 11:59:16,570 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 11:59:16,571 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 11:59:16,571 INFO L371 AbstractCegarLoop]: === Iteration 1 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-04 11:59:16,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1546631509, now seen corresponding path program 1 times [2018-02-04 11:59:16,577 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 11:59:16,578 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 11:59:16,623 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 11:59:16,624 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 11:59:16,624 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 11:59:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 11:59:16,679 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 11:59:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 11:59:16,766 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 11:59:16,767 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-04 11:59:16,768 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-04 11:59:16,777 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-04 11:59:16,777 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-04 11:59:16,779 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2018-02-04 11:59:16,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 11:59:16,841 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2018-02-04 11:59:16,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-04 11:59:16,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-02-04 11:59:16,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 11:59:16,847 INFO L225 Difference]: With dead ends: 36 [2018-02-04 11:59:16,847 INFO L226 Difference]: Without dead ends: 33 [2018-02-04 11:59:16,848 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-02-04 11:59:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-02-04 11:59:16,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-02-04 11:59:16,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-02-04 11:59:16,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-02-04 11:59:16,918 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 11 [2018-02-04 11:59:16,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 11:59:16,918 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-02-04 11:59:16,918 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-04 11:59:16,918 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-02-04 11:59:16,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-02-04 11:59:16,919 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 11:59:16,919 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 11:59:16,919 INFO L371 AbstractCegarLoop]: === Iteration 2 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-04 11:59:16,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1546631508, now seen corresponding path program 1 times [2018-02-04 11:59:16,919 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 11:59:16,919 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 11:59:16,920 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 11:59:16,920 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 11:59:16,920 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 11:59:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 11:59:16,933 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 11:59:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 11:59:17,017 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 11:59:17,018 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-04 11:59:17,019 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-04 11:59:17,019 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-04 11:59:17,019 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-02-04 11:59:17,020 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 5 states. [2018-02-04 11:59:17,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 11:59:17,059 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2018-02-04 11:59:17,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-04 11:59:17,059 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-02-04 11:59:17,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 11:59:17,060 INFO L225 Difference]: With dead ends: 32 [2018-02-04 11:59:17,060 INFO L226 Difference]: Without dead ends: 32 [2018-02-04 11:59:17,061 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-02-04 11:59:17,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-02-04 11:59:17,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-02-04 11:59:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-02-04 11:59:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-02-04 11:59:17,064 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 11 [2018-02-04 11:59:17,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 11:59:17,065 INFO L432 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-02-04 11:59:17,065 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-04 11:59:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-02-04 11:59:17,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-02-04 11:59:17,065 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 11:59:17,066 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 11:59:17,066 INFO L371 AbstractCegarLoop]: === Iteration 3 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-04 11:59:17,066 INFO L82 PathProgramCache]: Analyzing trace with hash -496824236, now seen corresponding path program 1 times [2018-02-04 11:59:17,066 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 11:59:17,066 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 11:59:17,067 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 11:59:17,067 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 11:59:17,067 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 11:59:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 11:59:17,080 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 11:59:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 11:59:17,140 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 11:59:17,140 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-02-04 11:59:17,140 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-02-04 11:59:17,140 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-02-04 11:59:17,140 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-02-04 11:59:17,141 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 8 states. [2018-02-04 11:59:17,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 11:59:17,227 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-02-04 11:59:17,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-02-04 11:59:17,227 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-02-04 11:59:17,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 11:59:17,228 INFO L225 Difference]: With dead ends: 30 [2018-02-04 11:59:17,228 INFO L226 Difference]: Without dead ends: 30 [2018-02-04 11:59:17,228 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-02-04 11:59:17,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-02-04 11:59:17,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-02-04 11:59:17,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-02-04 11:59:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-02-04 11:59:17,232 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 19 [2018-02-04 11:59:17,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 11:59:17,232 INFO L432 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-02-04 11:59:17,233 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-02-04 11:59:17,233 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-02-04 11:59:17,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-02-04 11:59:17,233 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 11:59:17,233 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 11:59:17,233 INFO L371 AbstractCegarLoop]: === Iteration 4 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-04 11:59:17,234 INFO L82 PathProgramCache]: Analyzing trace with hash -496824235, now seen corresponding path program 1 times [2018-02-04 11:59:17,234 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 11:59:17,234 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 11:59:17,234 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 11:59:17,235 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 11:59:17,235 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 11:59:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 11:59:17,246 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 11:59:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 11:59:17,354 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 11:59:17,355 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-02-04 11:59:17,355 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-02-04 11:59:17,355 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-02-04 11:59:17,355 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-02-04 11:59:17,356 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2018-02-04 11:59:17,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 11:59:17,490 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-02-04 11:59:17,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-02-04 11:59:17,492 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-02-04 11:59:17,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 11:59:17,495 INFO L225 Difference]: With dead ends: 35 [2018-02-04 11:59:17,495 INFO L226 Difference]: Without dead ends: 35 [2018-02-04 11:59:17,495 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2018-02-04 11:59:17,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-02-04 11:59:17,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-02-04 11:59:17,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-02-04 11:59:17,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-02-04 11:59:17,499 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 19 [2018-02-04 11:59:17,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 11:59:17,500 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-02-04 11:59:17,500 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-02-04 11:59:17,500 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-02-04 11:59:17,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-02-04 11:59:17,501 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 11:59:17,501 INFO L351 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 11:59:17,501 INFO L371 AbstractCegarLoop]: === Iteration 5 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-04 11:59:17,501 INFO L82 PathProgramCache]: Analyzing trace with hash -433504008, now seen corresponding path program 1 times [2018-02-04 11:59:17,501 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 11:59:17,502 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 11:59:17,502 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 11:59:17,502 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 11:59:17,503 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 11:59:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 11:59:17,528 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 11:59:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 11:59:17,633 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 11:59:17,634 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-02-04 11:59:17,634 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-02-04 11:59:17,634 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-02-04 11:59:17,635 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-02-04 11:59:17,635 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2018-02-04 11:59:17,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 11:59:17,757 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-02-04 11:59:17,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-02-04 11:59:17,757 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-02-04 11:59:17,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 11:59:17,758 INFO L225 Difference]: With dead ends: 51 [2018-02-04 11:59:17,758 INFO L226 Difference]: Without dead ends: 51 [2018-02-04 11:59:17,758 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2018-02-04 11:59:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-02-04 11:59:17,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2018-02-04 11:59:17,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-02-04 11:59:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-02-04 11:59:17,761 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 22 [2018-02-04 11:59:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 11:59:17,761 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-02-04 11:59:17,761 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-02-04 11:59:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-02-04 11:59:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-02-04 11:59:17,762 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 11:59:17,762 INFO L351 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 11:59:17,762 INFO L371 AbstractCegarLoop]: === Iteration 6 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-04 11:59:17,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1713367686, now seen corresponding path program 1 times [2018-02-04 11:59:17,762 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 11:59:17,762 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 11:59:17,763 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 11:59:17,763 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 11:59:17,763 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 11:59:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-04 11:59:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-04 11:59:17,793 INFO L410 BasicCegarLoop]: Counterexample might be feasible [2018-02-04 11:59:17,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.02 11:59:17 BoogieIcfgContainer [2018-02-04 11:59:17,809 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-04 11:59:17,810 INFO L168 Benchmark]: Toolchain (without parser) took 1659.55 ms. Allocated memory was 401.1 MB in the beginning and 607.6 MB in the end (delta: 206.6 MB). Free memory was 357.8 MB in the beginning and 439.5 MB in the end (delta: -81.7 MB). Peak memory consumption was 124.8 MB. Max. memory is 5.3 GB. [2018-02-04 11:59:17,810 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 401.1 MB. Free memory is still 364.4 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 11:59:17,811 INFO L168 Benchmark]: CACSL2BoogieTranslator took 153.59 ms. Allocated memory is still 401.1 MB. Free memory was 357.8 MB in the beginning and 348.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. [2018-02-04 11:59:17,811 INFO L168 Benchmark]: Boogie Preprocessor took 28.13 ms. Allocated memory is still 401.1 MB. Free memory was 348.5 MB in the beginning and 345.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. [2018-02-04 11:59:17,811 INFO L168 Benchmark]: RCFGBuilder took 162.19 ms. Allocated memory is still 401.1 MB. Free memory was 345.9 MB in the beginning and 328.7 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 5.3 GB. [2018-02-04 11:59:17,811 INFO L168 Benchmark]: TraceAbstraction took 1312.73 ms. Allocated memory was 401.1 MB in the beginning and 607.6 MB in the end (delta: 206.6 MB). Free memory was 328.7 MB in the beginning and 439.5 MB in the end (delta: -110.8 MB). Peak memory consumption was 95.7 MB. Max. memory is 5.3 GB. [2018-02-04 11:59:17,812 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 401.1 MB. Free memory is still 364.4 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 153.59 ms. Allocated memory is still 401.1 MB. Free memory was 357.8 MB in the beginning and 348.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 28.13 ms. Allocated memory is still 401.1 MB. Free memory was 348.5 MB in the beginning and 345.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. * RCFGBuilder took 162.19 ms. Allocated memory is still 401.1 MB. Free memory was 345.9 MB in the beginning and 328.7 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1312.73 ms. Allocated memory was 401.1 MB in the beginning and 607.6 MB in the end (delta: 206.6 MB). Free memory was 328.7 MB in the beginning and 439.5 MB in the end (delta: -110.8 MB). Peak memory consumption was 95.7 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L557] CALL, EXPR build_nondet_String() [L541] int length = __VERIFIER_nondet_int(); [L542] COND FALSE !(length < 1) VAL [length=2] [L545] EXPR, FCALL malloc(length * sizeof(char)) VAL [length=2, malloc(length * sizeof(char))={4:0}] [L545] char* nondetString = (char*) malloc(length * sizeof(char)); VAL [length=2, malloc(length * sizeof(char))={4:0}, nondetString={4:0}] [L546] FCALL nondetString[length-1] = '\0' VAL [length=2, malloc(length * sizeof(char))={4:0}, nondetString={4:0}] [L547] RET return nondetString; VAL [\result={4:0}, length=2, malloc(length * sizeof(char))={4:0}, nondetString={4:0}] [L557] EXPR build_nondet_String() VAL [build_nondet_String()={4:0}] [L557] char* p = build_nondet_String(); [L558] CALL cstrlen(p) VAL [s={4:0}] [L551] const char *p = s; VAL [p={4:0}, s={4:0}, s={4:0}] [L552] EXPR, FCALL \read(*p) VAL [\read(*p)=5, p={4:0}, s={4:0}, s={4:0}] [L552] COND TRUE *p != '\0' [L553] p = p+2 VAL [p={4:2}, s={4:0}, s={4:0}] [L552] FCALL \read(*p) VAL [p={4:2}, s={4:0}, s={4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 7 error locations. UNSAFE Result, 1.2s OverallTime, 6 OverallIterations, 2 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 123 SDtfs, 96 SDslu, 410 SDs, 0 SdLazy, 316 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=5, 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, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 77 ConstructedInterpolants, 0 QuantifiedInterpolants, 5386 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen_unsafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-Benchmark-0-2018-02-04_11-59-17-817.csv Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen_unsafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-02-04_11-59-17-817.csv Received shutdown request...