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_SmtInterpol_Array.epf -i ../../../trunk/examples/svcomp/array-memsafety/reverse_array_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-a74eeac-m [2018-02-02 19:49:49,172 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-02 19:49:49,173 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-02 19:49:49,185 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-02 19:49:49,185 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-02 19:49:49,186 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-02 19:49:49,187 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-02 19:49:49,188 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-02 19:49:49,190 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-02 19:49:49,190 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-02 19:49:49,191 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-02 19:49:49,191 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-02 19:49:49,192 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-02 19:49:49,193 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-02 19:49:49,194 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-02 19:49:49,195 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-02 19:49:49,197 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-02 19:49:49,199 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-02 19:49:49,200 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-02 19:49:49,201 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-02 19:49:49,203 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-02-02 19:49:49,206 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-02 19:49:49,206 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-02 19:49:49,207 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_SmtInterpol_Array.epf [2018-02-02 19:49:49,216 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-02 19:49:49,216 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-02 19:49:49,217 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-02 19:49:49,217 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-02 19:49:49,217 INFO L133 SettingsManager]: * Use SBE=true [2018-02-02 19:49:49,217 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-02 19:49:49,217 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-02 19:49:49,218 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-02 19:49:49,218 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-02 19:49:49,218 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-02 19:49:49,218 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-02 19:49:49,218 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-02 19:49:49,218 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-02 19:49:49,219 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-02 19:49:49,219 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-02 19:49:49,219 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-02 19:49:49,219 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-02 19:49:49,219 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-02 19:49:49,219 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-02 19:49:49,219 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-02 19:49:49,220 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-02 19:49:49,220 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-02 19:49:49,220 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-02-02 19:49:49,246 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-02 19:49:49,254 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-02 19:49:49,257 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-02 19:49:49,258 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-02 19:49:49,259 INFO L276 PluginConnector]: CDTParser initialized [2018-02-02 19:49:49,259 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/reverse_array_unsafe_false-valid-deref.i [2018-02-02 19:49:49,375 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-02 19:49:49,376 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-02 19:49:49,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-02 19:49:49,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-02 19:49:49,381 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-02 19:49:49,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 07:49:49" (1/1) ... [2018-02-02 19:49:49,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af2d12f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 07:49:49, skipping insertion in model container [2018-02-02 19:49:49,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 07:49:49" (1/1) ... [2018-02-02 19:49:49,393 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 19:49:49,424 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 19:49:49,527 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 19:49:49,540 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 19:49:49,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 07:49:49 WrapperNode [2018-02-02 19:49:49,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-02 19:49:49,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-02 19:49:49,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-02 19:49:49,547 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-02 19:49:49,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 07:49:49" (1/1) ... [2018-02-02 19:49:49,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 07:49:49" (1/1) ... [2018-02-02 19:49:49,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 07:49:49" (1/1) ... [2018-02-02 19:49:49,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 07:49:49" (1/1) ... [2018-02-02 19:49:49,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 07:49:49" (1/1) ... [2018-02-02 19:49:49,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 07:49:49" (1/1) ... [2018-02-02 19:49:49,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 07:49:49" (1/1) ... [2018-02-02 19:49:49,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-02 19:49:49,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-02 19:49:49,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-02 19:49:49,577 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-02 19:49:49,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 07:49:49" (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 19:49:49,618 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-02 19:49:49,618 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-02 19:49:49,618 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-02 19:49:49,618 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-02 19:49:49,619 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-02 19:49:49,619 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-02 19:49:49,619 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-02 19:49:49,619 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-02 19:49:49,619 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-02 19:49:49,619 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-02 19:49:49,619 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-02 19:49:49,619 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-02 19:49:49,841 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-02 19:49:49,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 07:49:49 BoogieIcfgContainer [2018-02-02 19:49:49,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-02 19:49:49,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-02 19:49:49,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-02 19:49:49,846 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-02 19:49:49,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 07:49:49" (1/3) ... [2018-02-02 19:49:49,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7938ea28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 07:49:49, skipping insertion in model container [2018-02-02 19:49:49,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 07:49:49" (2/3) ... [2018-02-02 19:49:49,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7938ea28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 07:49:49, skipping insertion in model container [2018-02-02 19:49:49,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 07:49:49" (3/3) ... [2018-02-02 19:49:49,849 INFO L107 eAbstractionObserver]: Analyzing ICFG reverse_array_unsafe_false-valid-deref.i [2018-02-02 19:49:49,855 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-02-02 19:49:49,859 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2018-02-02 19:49:49,890 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-02 19:49:49,890 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-02 19:49:49,890 INFO L324 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-02-02 19:49:49,890 INFO L325 AbstractCegarLoop]: Backedges is CANONICAL [2018-02-02 19:49:49,890 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-02 19:49:49,890 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-02 19:49:49,890 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-02 19:49:49,891 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-02 19:49:49,891 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-02 19:49:49,900 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-02-02 19:49:49,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-02-02 19:49:49,909 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 19:49:49,910 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 19:49:49,915 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr20EnsuresViolation, mainErr9RequiresViolation, mainErr18RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, mainErr19RequiresViolation]=== [2018-02-02 19:49:49,918 INFO L82 PathProgramCache]: Analyzing trace with hash -506470517, now seen corresponding path program 1 times [2018-02-02 19:49:49,953 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-02 19:49:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 19:49:50,001 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 19:49:50,029 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 19:49:50,030 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 19:49:50,030 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-02-02 19:49:50,031 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-02 19:49:50,032 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 19:49:50,032 INFO L182 omatonBuilderFactory]: Interpolants [66#true, 67#false] [2018-02-02 19:49:50,032 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 19:49:50,033 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-02-02 19:49:50,044 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-02-02 19:49:50,045 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-02-02 19:49:50,046 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2018-02-02 19:49:50,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 19:49:50,057 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-02-02 19:49:50,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-02-02 19:49:50,058 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-02-02 19:49:50,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 19:49:50,063 INFO L225 Difference]: With dead ends: 63 [2018-02-02 19:49:50,064 INFO L226 Difference]: Without dead ends: 60 [2018-02-02 19:49:50,065 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-02-02 19:49:50,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-02-02 19:49:50,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-02-02 19:49:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-02-02 19:49:50,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2018-02-02 19:49:50,144 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 12 [2018-02-02 19:49:50,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 19:49:50,145 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2018-02-02 19:49:50,145 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-02-02 19:49:50,145 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2018-02-02 19:49:50,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-02 19:49:50,145 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 19:49:50,145 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 19:49:50,145 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr20EnsuresViolation, mainErr9RequiresViolation, mainErr18RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, mainErr19RequiresViolation]=== [2018-02-02 19:49:50,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258408, now seen corresponding path program 1 times [2018-02-02 19:49:50,146 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-02 19:49:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 19:49:50,158 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 19:49:50,190 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 19:49:50,190 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 19:49:50,190 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-02 19:49:50,190 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-02 19:49:50,190 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 19:49:50,190 INFO L182 omatonBuilderFactory]: Interpolants [192#false, 193#(= 1 (select |#valid| |main_#t~malloc2.base|)), 194#(= 1 (select |#valid| main_~arr~0.base)), 191#true] [2018-02-02 19:49:50,190 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 19:49:50,191 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 19:49:50,191 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 19:49:50,192 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 19:49:50,192 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 4 states. [2018-02-02 19:49:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 19:49:50,244 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2018-02-02 19:49:50,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-02 19:49:50,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-02-02 19:49:50,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 19:49:50,245 INFO L225 Difference]: With dead ends: 56 [2018-02-02 19:49:50,245 INFO L226 Difference]: Without dead ends: 56 [2018-02-02 19:49:50,246 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 19:49:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-02-02 19:49:50,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-02-02 19:49:50,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-02-02 19:49:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2018-02-02 19:49:50,249 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 13 [2018-02-02 19:49:50,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 19:49:50,249 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2018-02-02 19:49:50,249 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 19:49:50,249 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2018-02-02 19:49:50,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-02 19:49:50,250 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 19:49:50,250 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 19:49:50,250 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr20EnsuresViolation, mainErr9RequiresViolation, mainErr18RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, mainErr19RequiresViolation]=== [2018-02-02 19:49:50,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258409, now seen corresponding path program 1 times [2018-02-02 19:49:50,250 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-02 19:49:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 19:49:50,261 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 19:49:50,301 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 19:49:50,302 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 19:49:50,302 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-02 19:49:50,302 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-02 19:49:50,302 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 19:49:50,302 INFO L182 omatonBuilderFactory]: Interpolants [309#true, 310#false, 311#(<= 1 main_~length~0), 312#(and (<= 1 main_~length~0) (= main_~i~0 0))] [2018-02-02 19:49:50,302 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 19:49:50,302 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 19:49:50,302 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 19:49:50,303 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-02-02 19:49:50,303 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 4 states. [2018-02-02 19:49:50,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 19:49:50,376 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2018-02-02 19:49:50,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-02 19:49:50,381 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-02-02 19:49:50,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 19:49:50,382 INFO L225 Difference]: With dead ends: 68 [2018-02-02 19:49:50,382 INFO L226 Difference]: Without dead ends: 68 [2018-02-02 19:49:50,382 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-02-02 19:49:50,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-02-02 19:49:50,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2018-02-02 19:49:50,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-02-02 19:49:50,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2018-02-02 19:49:50,391 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 13 [2018-02-02 19:49:50,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 19:49:50,392 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2018-02-02 19:49:50,392 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 19:49:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2018-02-02 19:49:50,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-02 19:49:50,392 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 19:49:50,392 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 19:49:50,393 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr20EnsuresViolation, mainErr9RequiresViolation, mainErr18RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, mainErr19RequiresViolation]=== [2018-02-02 19:49:50,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258450, now seen corresponding path program 1 times [2018-02-02 19:49:50,394 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-02 19:49:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-02 19:49:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-02 19:49:50,437 INFO L410 BasicCegarLoop]: Counterexample might be feasible [2018-02-02 19:49:50,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.02 07:49:50 BoogieIcfgContainer [2018-02-02 19:49:50,455 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-02 19:49:50,456 INFO L168 Benchmark]: Toolchain (without parser) took 1080.24 ms. Allocated memory was 393.2 MB in the beginning and 584.6 MB in the end (delta: 191.4 MB). Free memory was 351.2 MB in the beginning and 523.5 MB in the end (delta: -172.3 MB). Peak memory consumption was 19.1 MB. Max. memory is 5.3 GB. [2018-02-02 19:49:50,456 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 393.2 MB. Free memory is still 356.5 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 19:49:50,457 INFO L168 Benchmark]: CACSL2BoogieTranslator took 170.38 ms. Allocated memory is still 393.2 MB. Free memory was 349.9 MB in the beginning and 339.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. [2018-02-02 19:49:50,457 INFO L168 Benchmark]: Boogie Preprocessor took 29.20 ms. Allocated memory is still 393.2 MB. Free memory was 339.3 MB in the beginning and 338.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. [2018-02-02 19:49:50,457 INFO L168 Benchmark]: RCFGBuilder took 265.22 ms. Allocated memory is still 393.2 MB. Free memory was 338.0 MB in the beginning and 315.5 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 5.3 GB. [2018-02-02 19:49:50,457 INFO L168 Benchmark]: TraceAbstraction took 612.71 ms. Allocated memory was 393.2 MB in the beginning and 584.6 MB in the end (delta: 191.4 MB). Free memory was 315.5 MB in the beginning and 523.5 MB in the end (delta: -208.0 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 19:49:50,458 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 393.2 MB. Free memory is still 356.5 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 170.38 ms. Allocated memory is still 393.2 MB. Free memory was 349.9 MB in the beginning and 339.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 29.20 ms. Allocated memory is still 393.2 MB. Free memory was 339.3 MB in the beginning and 338.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. * RCFGBuilder took 265.22 ms. Allocated memory is still 393.2 MB. Free memory was 338.0 MB in the beginning and 315.5 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 5.3 GB. * TraceAbstraction took 612.71 ms. Allocated memory was 393.2 MB in the beginning and 584.6 MB in the end (delta: 191.4 MB). Free memory was 315.5 MB in the beginning and 523.5 MB in the end (delta: -208.0 MB). There was no memory consumed. 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: [L541] int i, j, tmp; [L542] int length = __VERIFIER_nondet_int(); [L543] COND TRUE length < 1 [L543] length = 1 VAL [length=1] [L544] COND FALSE !(length % 2 == 0) VAL [length=1] [L545] EXPR, FCALL __builtin_alloca (length) VAL [__builtin_alloca (length)={3:0}, length=1] [L545] int *arr = __builtin_alloca (length); [L546] i=0 VAL [__builtin_alloca (length)={3:0}, arr={3:0}, i=0, length=1] [L546] COND TRUE i