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/cav18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_SmtInterpol_Array.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrlen_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-26d9e06-m [2018-02-02 09:46:16,465 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-02 09:46:16,466 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-02 09:46:16,478 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-02 09:46:16,478 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-02 09:46:16,479 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-02 09:46:16,480 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-02 09:46:16,481 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-02 09:46:16,483 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-02 09:46:16,484 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-02 09:46:16,484 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-02 09:46:16,485 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-02 09:46:16,485 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-02 09:46:16,486 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-02 09:46:16,487 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-02 09:46:16,489 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-02 09:46:16,490 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-02 09:46:16,492 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-02 09:46:16,493 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-02 09:46:16,494 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-02 09:46:16,495 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-02-02 09:46:16,499 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-02 09:46:16,500 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-02 09:46:16,500 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cav18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_SmtInterpol_Array.epf [2018-02-02 09:46:16,509 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-02 09:46:16,509 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-02 09:46:16,510 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-02 09:46:16,510 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-02 09:46:16,510 INFO L133 SettingsManager]: * Use SBE=true [2018-02-02 09:46:16,510 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-02 09:46:16,510 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-02 09:46:16,510 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-02 09:46:16,510 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-02 09:46:16,511 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-02 09:46:16,511 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-02 09:46:16,511 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-02 09:46:16,511 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-02 09:46:16,511 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-02 09:46:16,511 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-02 09:46:16,511 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-02 09:46:16,511 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-02 09:46:16,511 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-02 09:46:16,511 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-02 09:46:16,512 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-02 09:46:16,512 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-02 09:46:16,512 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-02 09:46:16,512 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-02-02 09:46:16,543 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-02 09:46:16,553 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-02 09:46:16,557 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-02 09:46:16,558 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-02 09:46:16,558 INFO L276 PluginConnector]: CDTParser initialized [2018-02-02 09:46:16,559 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrlen_unsafe_false-valid-deref.i [2018-02-02 09:46:16,677 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-02 09:46:16,678 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-02 09:46:16,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-02 09:46:16,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-02 09:46:16,683 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-02 09:46:16,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:46:16" (1/1) ... [2018-02-02 09:46:16,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ff4e8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:46:16, skipping insertion in model container [2018-02-02 09:46:16,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:46:16" (1/1) ... [2018-02-02 09:46:16,700 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 09:46:16,729 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 09:46:16,814 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 09:46:16,825 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 09:46:16,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:46:16 WrapperNode [2018-02-02 09:46:16,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-02 09:46:16,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-02 09:46:16,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-02 09:46:16,829 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-02 09:46:16,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:46:16" (1/1) ... [2018-02-02 09:46:16,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:46:16" (1/1) ... [2018-02-02 09:46:16,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:46:16" (1/1) ... [2018-02-02 09:46:16,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:46:16" (1/1) ... [2018-02-02 09:46:16,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:46:16" (1/1) ... [2018-02-02 09:46:16,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:46:16" (1/1) ... [2018-02-02 09:46:16,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:46:16" (1/1) ... [2018-02-02 09:46:16,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-02 09:46:16,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-02 09:46:16,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-02 09:46:16,853 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-02 09:46:16,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:46:16" (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 [2018-02-02 09:46:16,888 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-02 09:46:16,888 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-02 09:46:16,888 INFO L136 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2018-02-02 09:46:16,889 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrlen [2018-02-02 09:46:16,889 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-02 09:46:16,889 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-02 09:46:16,889 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-02 09:46:16,889 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-02 09:46:16,889 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-02 09:46:16,889 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-02 09:46:16,890 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-02-02 09:46:16,890 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-02-02 09:46:16,890 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-02 09:46:16,890 INFO L128 BoogieDeclarations]: Found specification of procedure build_nondet_String [2018-02-02 09:46:16,890 INFO L128 BoogieDeclarations]: Found specification of procedure cstrlen [2018-02-02 09:46:16,890 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-02 09:46:16,890 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-02 09:46:16,890 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-02 09:46:17,008 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-02 09:46:17,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:46:17 BoogieIcfgContainer [2018-02-02 09:46:17,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-02 09:46:17,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-02 09:46:17,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-02 09:46:17,012 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-02 09:46:17,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 09:46:16" (1/3) ... [2018-02-02 09:46:17,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e0e2c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 09:46:17, skipping insertion in model container [2018-02-02 09:46:17,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:46:16" (2/3) ... [2018-02-02 09:46:17,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e0e2c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 09:46:17, skipping insertion in model container [2018-02-02 09:46:17,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:46:17" (3/3) ... [2018-02-02 09:46:17,014 INFO L107 eAbstractionObserver]: Analyzing ICFG cstrlen_unsafe_false-valid-deref.i [2018-02-02 09:46:17,019 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-02-02 09:46:17,024 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-02-02 09:46:17,065 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-02 09:46:17,065 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-02 09:46:17,065 INFO L324 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-02-02 09:46:17,066 INFO L325 AbstractCegarLoop]: Backedges is CANONICAL [2018-02-02 09:46:17,066 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-02 09:46:17,066 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-02 09:46:17,066 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-02 09:46:17,066 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-02 09:46:17,066 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-02 09:46:17,076 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2018-02-02 09:46:17,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-02-02 09:46:17,083 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 09:46:17,084 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 09:46:17,084 INFO L371 AbstractCegarLoop]: === Iteration 1 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 09:46:17,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1546631509, now seen corresponding path program 1 times [2018-02-02 09:46:17,122 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-02 09:46:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 09:46:17,162 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 09:46:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 09:46:17,226 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 09:46:17,226 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-02 09:46:17,227 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-02 09:46:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 09:46:17,228 INFO L182 omatonBuilderFactory]: Interpolants [40#true, 41#false, 42#(= 1 (select |#valid| |build_nondet_String_#t~malloc1.base|)), 43#(= 1 (select |#valid| build_nondet_String_~nondetString~0.base))] [2018-02-02 09:46:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 09:46:17,228 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 09:46:17,237 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 09:46:17,237 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 09:46:17,239 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2018-02-02 09:46:17,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 09:46:17,285 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2018-02-02 09:46:17,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-02 09:46:17,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-02-02 09:46:17,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 09:46:17,293 INFO L225 Difference]: With dead ends: 36 [2018-02-02 09:46:17,294 INFO L226 Difference]: Without dead ends: 33 [2018-02-02 09:46:17,295 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 [2018-02-02 09:46:17,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-02-02 09:46:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-02-02 09:46:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-02-02 09:46:17,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-02-02 09:46:17,370 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 11 [2018-02-02 09:46:17,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 09:46:17,370 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-02-02 09:46:17,370 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 09:46:17,370 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-02-02 09:46:17,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-02-02 09:46:17,370 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 09:46:17,371 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 09:46:17,371 INFO L371 AbstractCegarLoop]: === Iteration 2 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 09:46:17,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1546631508, now seen corresponding path program 1 times [2018-02-02 09:46:17,372 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-02 09:46:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 09:46:17,387 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 09:46:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 09:46:17,471 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 09:46:17,471 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-02 09:46:17,471 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-02 09:46:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 09:46:17,472 INFO L182 omatonBuilderFactory]: Interpolants [115#true, 116#false, 117#(<= 1 build_nondet_String_~length~0), 118#(and (<= 1 build_nondet_String_~length~0) (= build_nondet_String_~length~0 (select |#length| |build_nondet_String_#t~malloc1.base|)) (= 0 |build_nondet_String_#t~malloc1.offset|)), 119#(and (<= 1 build_nondet_String_~length~0) (= build_nondet_String_~length~0 (select |#length| build_nondet_String_~nondetString~0.base)) (= build_nondet_String_~nondetString~0.offset 0))] [2018-02-02 09:46:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 09:46:17,473 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-02 09:46:17,473 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-02 09:46:17,473 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-02-02 09:46:17,474 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 5 states. [2018-02-02 09:46:17,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 09:46:17,504 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2018-02-02 09:46:17,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-02 09:46:17,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-02-02 09:46:17,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 09:46:17,506 INFO L225 Difference]: With dead ends: 32 [2018-02-02 09:46:17,506 INFO L226 Difference]: Without dead ends: 32 [2018-02-02 09:46:17,507 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 [2018-02-02 09:46:17,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-02-02 09:46:17,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-02-02 09:46:17,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-02-02 09:46:17,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-02-02 09:46:17,511 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 11 [2018-02-02 09:46:17,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 09:46:17,511 INFO L432 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-02-02 09:46:17,511 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-02 09:46:17,511 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-02-02 09:46:17,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-02-02 09:46:17,512 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 09:46:17,512 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 09:46:17,512 INFO L371 AbstractCegarLoop]: === Iteration 3 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 09:46:17,512 INFO L82 PathProgramCache]: Analyzing trace with hash -496824236, now seen corresponding path program 1 times [2018-02-02 09:46:17,513 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-02 09:46:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 09:46:17,526 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 09:46:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 09:46:17,577 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 09:46:17,577 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-02-02 09:46:17,577 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-02 09:46:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 09:46:17,578 INFO L182 omatonBuilderFactory]: Interpolants [192#(= 1 (select |#valid| |cstrlen_#in~s.base|)), 193#(= 1 (select |#valid| cstrlen_~p~0.base)), 186#true, 187#false, 188#(= 1 (select |#valid| build_nondet_String_~nondetString~0.base)), 189#(= 1 (select |#valid| |build_nondet_String_#res.base|)), 190#(= 1 (select |#valid| |main_#t~ret4.base|)), 191#(= 1 (select |#valid| main_~p~1.base))] [2018-02-02 09:46:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 09:46:17,578 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-02-02 09:46:17,578 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-02-02 09:46:17,578 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-02-02 09:46:17,578 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 8 states. [2018-02-02 09:46:17,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 09:46:17,687 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-02-02 09:46:17,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-02-02 09:46:17,688 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-02-02 09:46:17,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 09:46:17,689 INFO L225 Difference]: With dead ends: 30 [2018-02-02 09:46:17,689 INFO L226 Difference]: Without dead ends: 30 [2018-02-02 09:46:17,689 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 [2018-02-02 09:46:17,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-02-02 09:46:17,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-02-02 09:46:17,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-02-02 09:46:17,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-02-02 09:46:17,693 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 19 [2018-02-02 09:46:17,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 09:46:17,693 INFO L432 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-02-02 09:46:17,693 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-02-02 09:46:17,693 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-02-02 09:46:17,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-02-02 09:46:17,694 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 09:46:17,694 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 09:46:17,694 INFO L371 AbstractCegarLoop]: === Iteration 4 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 09:46:17,694 INFO L82 PathProgramCache]: Analyzing trace with hash -496824235, now seen corresponding path program 1 times [2018-02-02 09:46:17,695 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-02 09:46:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 09:46:17,706 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 09:46:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 09:46:17,834 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 09:46:17,834 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-02-02 09:46:17,834 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-02 09:46:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 09:46:17,835 INFO L182 omatonBuilderFactory]: Interpolants [258#true, 259#false, 260#(<= 1 build_nondet_String_~length~0), 261#(and (<= 1 build_nondet_String_~length~0) (= build_nondet_String_~length~0 (select |#length| |build_nondet_String_#t~malloc1.base|)) (= 0 |build_nondet_String_#t~malloc1.offset|)), 262#(and (= 0 build_nondet_String_~nondetString~0.offset) (<= 1 build_nondet_String_~length~0) (= build_nondet_String_~length~0 (select |#length| build_nondet_String_~nondetString~0.base))), 263#(and (= 0 build_nondet_String_~nondetString~0.offset) (<= 1 (select |#length| build_nondet_String_~nondetString~0.base))), 264#(and (<= 1 (select |#length| |build_nondet_String_#res.base|)) (= 0 |build_nondet_String_#res.offset|)), 265#(and (<= 1 (select |#length| |main_#t~ret4.base|)) (= 0 |main_#t~ret4.offset|)), 266#(and (<= 1 (select |#length| main_~p~1.base)) (= 0 main_~p~1.offset)), 267#(and (<= 1 (select |#length| |cstrlen_#in~s.base|)) (= 0 |cstrlen_#in~s.offset|)), 268#(and (<= 1 (select |#length| cstrlen_~p~0.base)) (= cstrlen_~p~0.offset 0))] [2018-02-02 09:46:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 09:46:17,835 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-02-02 09:46:17,835 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-02-02 09:46:17,836 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-02-02 09:46:17,836 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2018-02-02 09:46:17,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 09:46:17,962 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-02-02 09:46:17,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-02-02 09:46:17,962 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-02-02 09:46:17,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 09:46:17,965 INFO L225 Difference]: With dead ends: 35 [2018-02-02 09:46:17,965 INFO L226 Difference]: Without dead ends: 35 [2018-02-02 09:46:17,966 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 [2018-02-02 09:46:17,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-02-02 09:46:17,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-02-02 09:46:17,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-02-02 09:46:17,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-02-02 09:46:17,971 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 19 [2018-02-02 09:46:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 09:46:17,971 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-02-02 09:46:17,971 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-02-02 09:46:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-02-02 09:46:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-02-02 09:46:17,972 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 09:46:17,972 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] [2018-02-02 09:46:17,972 INFO L371 AbstractCegarLoop]: === Iteration 5 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 09:46:17,972 INFO L82 PathProgramCache]: Analyzing trace with hash -433504008, now seen corresponding path program 1 times [2018-02-02 09:46:17,973 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-02 09:46:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 09:46:17,986 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 09:46:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 09:46:18,107 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 09:46:18,108 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-02-02 09:46:18,108 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-02 09:46:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 09:46:18,108 INFO L182 omatonBuilderFactory]: Interpolants [352#(= |cstrlen_#t~mem3| 0), 341#true, 342#false, 343#(and (<= 1 build_nondet_String_~length~0) (<= build_nondet_String_~length~0 1)), 344#(and (<= 1 build_nondet_String_~length~0) (= 0 |build_nondet_String_#t~malloc1.offset|) (<= build_nondet_String_~length~0 1)), 345#(and (= build_nondet_String_~nondetString~0.offset 0) (= (+ build_nondet_String_~nondetString~0.offset build_nondet_String_~length~0) 1)), 346#(and (= build_nondet_String_~nondetString~0.offset 0) (= 0 (select (select |#memory_int| build_nondet_String_~nondetString~0.base) build_nondet_String_~nondetString~0.offset))), 347#(= 0 (select (select |#memory_int| |build_nondet_String_#res.base|) |build_nondet_String_#res.offset|)), 348#(= 0 (select (select |#memory_int| |main_#t~ret4.base|) |main_#t~ret4.offset|)), 349#(= 0 (select (select |#memory_int| main_~p~1.base) main_~p~1.offset)), 350#(= 0 (select (select |#memory_int| |cstrlen_#in~s.base|) |cstrlen_#in~s.offset|)), 351#(= 0 (select (select |#memory_int| cstrlen_~p~0.base) cstrlen_~p~0.offset))] [2018-02-02 09:46:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 09:46:18,108 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-02-02 09:46:18,109 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-02-02 09:46:18,109 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-02-02 09:46:18,109 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2018-02-02 09:46:18,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 09:46:18,240 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-02-02 09:46:18,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-02-02 09:46:18,241 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-02-02 09:46:18,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 09:46:18,241 INFO L225 Difference]: With dead ends: 51 [2018-02-02 09:46:18,241 INFO L226 Difference]: Without dead ends: 51 [2018-02-02 09:46:18,242 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 [2018-02-02 09:46:18,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-02-02 09:46:18,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2018-02-02 09:46:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-02-02 09:46:18,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-02-02 09:46:18,245 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 22 [2018-02-02 09:46:18,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 09:46:18,245 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-02-02 09:46:18,245 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-02-02 09:46:18,245 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-02-02 09:46:18,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-02-02 09:46:18,246 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 09:46:18,246 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] [2018-02-02 09:46:18,246 INFO L371 AbstractCegarLoop]: === Iteration 6 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 09:46:18,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1713367686, now seen corresponding path program 1 times [2018-02-02 09:46:18,246 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-02 09:46:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-02 09:46:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-02 09:46:18,285 INFO L410 BasicCegarLoop]: Counterexample might be feasible [2018-02-02 09:46:18,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.02 09:46:18 BoogieIcfgContainer [2018-02-02 09:46:18,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-02 09:46:18,300 INFO L168 Benchmark]: Toolchain (without parser) took 1622.91 ms. Allocated memory was 404.8 MB in the beginning and 615.0 MB in the end (delta: 210.2 MB). Free memory was 361.6 MB in the beginning and 443.3 MB in the end (delta: -81.6 MB). Peak memory consumption was 128.6 MB. Max. memory is 5.3 GB. [2018-02-02 09:46:18,301 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 404.8 MB. Free memory is still 368.2 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 09:46:18,301 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.01 ms. Allocated memory is still 404.8 MB. Free memory was 361.6 MB in the beginning and 352.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. [2018-02-02 09:46:18,302 INFO L168 Benchmark]: Boogie Preprocessor took 23.74 ms. Allocated memory is still 404.8 MB. Free memory was 352.4 MB in the beginning and 349.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. [2018-02-02 09:46:18,302 INFO L168 Benchmark]: RCFGBuilder took 155.90 ms. Allocated memory is still 404.8 MB. Free memory was 349.7 MB in the beginning and 333.1 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 5.3 GB. [2018-02-02 09:46:18,302 INFO L168 Benchmark]: TraceAbstraction took 1290.30 ms. Allocated memory was 404.8 MB in the beginning and 615.0 MB in the end (delta: 210.2 MB). Free memory was 333.1 MB in the beginning and 443.3 MB in the end (delta: -110.2 MB). Peak memory consumption was 100.0 MB. Max. memory is 5.3 GB. [2018-02-02 09:46:18,303 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 404.8 MB. Free memory is still 368.2 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 150.01 ms. Allocated memory is still 404.8 MB. Free memory was 361.6 MB in the beginning and 352.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 23.74 ms. Allocated memory is still 404.8 MB. Free memory was 352.4 MB in the beginning and 349.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. * RCFGBuilder took 155.90 ms. Allocated memory is still 404.8 MB. Free memory was 349.7 MB in the beginning and 333.1 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1290.30 ms. Allocated memory was 404.8 MB in the beginning and 615.0 MB in the end (delta: 210.2 MB). Free memory was 333.1 MB in the beginning and 443.3 MB in the end (delta: -110.2 MB). Peak memory consumption was 100.0 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, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 2/2 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_SmtInterpol_Array.epf_AutomizerC.xml/Csv-Benchmark-0-2018-02-02_09-46-18-307.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_SmtInterpol_Array.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-02-02_09-46-18-307.csv Received shutdown request...