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_z3.epf -i ../../../trunk/examples/svcomp/array-memsafety/diff_usafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c17473d-m [2018-02-04 20:20:59,851 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-04 20:20:59,852 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-04 20:20:59,865 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-04 20:20:59,866 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-04 20:20:59,866 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-04 20:20:59,867 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-04 20:20:59,869 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-04 20:20:59,870 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-04 20:20:59,871 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-04 20:20:59,872 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-04 20:20:59,872 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-04 20:20:59,873 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-04 20:20:59,873 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-04 20:20:59,874 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-04 20:20:59,876 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-04 20:20:59,877 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-04 20:20:59,879 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-04 20:20:59,880 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-04 20:20:59,881 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-04 20:20:59,883 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-02-04 20:20:59,883 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-02-04 20:20:59,884 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-02-04 20:20:59,885 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-02-04 20:20:59,885 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-02-04 20:20:59,886 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-02-04 20:20:59,886 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-02-04 20:20:59,887 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-02-04 20:20:59,887 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-02-04 20:20:59,887 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-04 20:20:59,888 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-04 20:20:59,888 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_z3.epf [2018-02-04 20:20:59,897 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-04 20:20:59,898 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-04 20:20:59,899 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-04 20:20:59,899 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-04 20:20:59,899 INFO L133 SettingsManager]: * Use SBE=true [2018-02-04 20:20:59,899 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-04 20:20:59,900 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-04 20:20:59,900 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-04 20:20:59,900 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-04 20:20:59,900 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-04 20:20:59,900 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-04 20:20:59,900 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-04 20:20:59,901 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-04 20:20:59,901 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-04 20:20:59,901 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-04 20:20:59,901 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-04 20:20:59,901 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-04 20:20:59,901 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-04 20:20:59,901 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-04 20:20:59,902 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-04 20:20:59,902 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-04 20:20:59,902 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-02-04 20:20:59,902 INFO L133 SettingsManager]: * SMT solver=External_Z3InterpolationMode [2018-02-04 20:20:59,902 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-02-04 20:20:59,930 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-04 20:20:59,938 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-04 20:20:59,941 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-04 20:20:59,942 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-04 20:20:59,942 INFO L276 PluginConnector]: CDTParser initialized [2018-02-04 20:20:59,943 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/diff_usafe_false-valid-deref.i [2018-02-04 20:21:00,018 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-04 20:21:00,019 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-04 20:21:00,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-04 20:21:00,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-04 20:21:00,024 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-04 20:21:00,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 08:21:00" (1/1) ... [2018-02-04 20:21:00,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@495c832f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:00, skipping insertion in model container [2018-02-04 20:21:00,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 08:21:00" (1/1) ... [2018-02-04 20:21:00,038 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 20:21:00,049 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 20:21:00,139 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 20:21:00,152 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 20:21:00,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:00 WrapperNode [2018-02-04 20:21:00,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-04 20:21:00,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-04 20:21:00,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-04 20:21:00,157 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-04 20:21:00,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:00" (1/1) ... [2018-02-04 20:21:00,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:00" (1/1) ... [2018-02-04 20:21:00,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:00" (1/1) ... [2018-02-04 20:21:00,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:00" (1/1) ... [2018-02-04 20:21:00,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:00" (1/1) ... [2018-02-04 20:21:00,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:00" (1/1) ... [2018-02-04 20:21:00,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:00" (1/1) ... [2018-02-04 20:21:00,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-04 20:21:00,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-04 20:21:00,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-04 20:21:00,182 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-04 20:21:00,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:00" (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 20:21:00,217 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-04 20:21:00,217 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-04 20:21:00,217 INFO L136 BoogieDeclarations]: Found implementation of procedure diff [2018-02-04 20:21:00,217 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-04 20:21:00,217 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-04 20:21:00,217 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-04 20:21:00,217 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-04 20:21:00,217 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-04 20:21:00,217 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-04 20:21:00,217 INFO L128 BoogieDeclarations]: Found specification of procedure diff [2018-02-04 20:21:00,218 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-04 20:21:00,218 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-04 20:21:00,218 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-04 20:21:00,348 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-04 20:21:00,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 08:21:00 BoogieIcfgContainer [2018-02-04 20:21:00,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-04 20:21:00,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-04 20:21:00,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-04 20:21:00,352 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-04 20:21:00,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.02 08:21:00" (1/3) ... [2018-02-04 20:21:00,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4178c862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 08:21:00, skipping insertion in model container [2018-02-04 20:21:00,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:00" (2/3) ... [2018-02-04 20:21:00,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4178c862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 08:21:00, skipping insertion in model container [2018-02-04 20:21:00,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 08:21:00" (3/3) ... [2018-02-04 20:21:00,354 INFO L107 eAbstractionObserver]: Analyzing ICFG diff_usafe_false-valid-deref.i [2018-02-04 20:21:00,360 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-02-04 20:21:00,365 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-02-04 20:21:00,387 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-04 20:21:00,387 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-04 20:21:00,387 INFO L324 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-02-04 20:21:00,387 INFO L325 AbstractCegarLoop]: Backedges is CANONICAL [2018-02-04 20:21:00,387 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-04 20:21:00,387 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-04 20:21:00,387 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-04 20:21:00,388 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-04 20:21:00,388 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-04 20:21:00,396 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2018-02-04 20:21:00,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-04 20:21:00,401 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 20:21:00,402 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 20:21:00,402 INFO L371 AbstractCegarLoop]: === Iteration 1 === [diffErr2RequiresViolation, diffErr4RequiresViolation, diffErr0RequiresViolation, diffErr6RequiresViolation, diffErr5RequiresViolation, diffErr1RequiresViolation, diffErr3RequiresViolation, diffErr7RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-04 20:21:00,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1637109738, now seen corresponding path program 1 times No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-02-04 20:21:00,422 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-04 20:21:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 20:21:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 20:21:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 20:21:00,506 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 20:21:00,525 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 20:21:00,525 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-04 20:21:00,525 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-04 20:21:00,526 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 20:21:00,526 INFO L182 omatonBuilderFactory]: Interpolants [48#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)), 49#(= |#memory_int| |old(#memory_int)|), 39#true, 40#false] [2018-02-04 20:21:00,526 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 20:21:00,527 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-04 20:21:00,534 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-04 20:21:00,535 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-04 20:21:00,536 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2018-02-04 20:21:00,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 20:21:00,651 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-02-04 20:21:00,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-04 20:21:00,652 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-02-04 20:21:00,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 20:21:00,658 INFO L225 Difference]: With dead ends: 59 [2018-02-04 20:21:00,658 INFO L226 Difference]: Without dead ends: 47 [2018-02-04 20:21:00,660 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 20:21:00,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-02-04 20:21:00,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-02-04 20:21:00,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-02-04 20:21:00,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2018-02-04 20:21:00,689 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 13 [2018-02-04 20:21:00,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 20:21:00,689 INFO L432 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2018-02-04 20:21:00,689 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-04 20:21:00,689 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2018-02-04 20:21:00,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-04 20:21:00,690 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 20:21:00,690 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 20:21:00,690 INFO L371 AbstractCegarLoop]: === Iteration 2 === [diffErr2RequiresViolation, diffErr4RequiresViolation, diffErr0RequiresViolation, diffErr6RequiresViolation, diffErr5RequiresViolation, diffErr1RequiresViolation, diffErr3RequiresViolation, diffErr7RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-04 20:21:00,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1592374036, now seen corresponding path program 1 times No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) [2018-02-04 20:21:00,696 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-02-04 20:21:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-04 20:21:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-04 20:21:00,764 INFO L410 BasicCegarLoop]: Counterexample might be feasible [2018-02-04 20:21:00,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.02 08:21:00 BoogieIcfgContainer [2018-02-04 20:21:00,786 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-04 20:21:00,786 INFO L168 Benchmark]: Toolchain (without parser) took 768.21 ms. Allocated memory is still 406.3 MB. Free memory was 363.2 MB in the beginning and 291.5 MB in the end (delta: 71.7 MB). Peak memory consumption was 71.7 MB. Max. memory is 5.3 GB. [2018-02-04 20:21:00,788 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 406.3 MB. Free memory is still 368.5 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 20:21:00,788 INFO L168 Benchmark]: CACSL2BoogieTranslator took 137.67 ms. Allocated memory is still 406.3 MB. Free memory was 363.2 MB in the beginning and 355.3 MB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 5.3 GB. [2018-02-04 20:21:00,789 INFO L168 Benchmark]: Boogie Preprocessor took 24.33 ms. Allocated memory is still 406.3 MB. Free memory is still 355.3 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 20:21:00,789 INFO L168 Benchmark]: RCFGBuilder took 167.30 ms. Allocated memory is still 406.3 MB. Free memory was 355.3 MB in the beginning and 336.0 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 5.3 GB. [2018-02-04 20:21:00,790 INFO L168 Benchmark]: TraceAbstraction took 436.17 ms. Allocated memory is still 406.3 MB. Free memory was 336.0 MB in the beginning and 291.5 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 MB. Max. memory is 5.3 GB. [2018-02-04 20:21:00,792 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 406.3 MB. Free memory is still 368.5 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 137.67 ms. Allocated memory is still 406.3 MB. Free memory was 363.2 MB in the beginning and 355.3 MB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 24.33 ms. Allocated memory is still 406.3 MB. Free memory is still 355.3 MB. There was no memory consumed. Max. memory is 5.3 GB. * RCFGBuilder took 167.30 ms. Allocated memory is still 406.3 MB. Free memory was 355.3 MB in the beginning and 336.0 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 5.3 GB. * TraceAbstraction took 436.17 ms. Allocated memory is still 406.3 MB. Free memory was 336.0 MB in the beginning and 291.5 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 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: [L27] int *A; [L28] int Alen = __VERIFIER_nondet_int(); [L29] int *B; [L30] int Blen = __VERIFIER_nondet_int(); [L31] int *D; VAL [Alen=1, Blen=1] [L32] CALL diff(A, Alen, B, Blen, D) VAL [\old(Alen)=1, \old(Blen)=1, A={0:9}, B={10:6}, D={8:7}] [L4] int k = 0; [L5] int i = 0; [L6] int l1 = Alen; [L7] int l2 = Blen; [L8] int found; VAL [\old(Alen)=1, \old(Blen)=1, A={0:9}, A={0:9}, Alen=1, B={10:6}, B={10:6}, Blen=1, D={8:7}, D={8:7}, i=0, k=0, l1=1, l2=1] [L9] COND TRUE i < l1 [L10] int j = 0; [L11] found = 0 VAL [\old(Alen)=1, \old(Blen)=1, A={0:9}, A={0:9}, Alen=1, B={10:6}, B={10:6}, Blen=1, D={8:7}, D={8:7}, found=0, i=0, j=0, k=0, l1=1, l2=1] [L12] COND TRUE j < l2 && !found VAL [\old(Alen)=1, \old(Blen)=1, A={0:9}, A={0:9}, Alen=1, B={10:6}, B={10:6}, Blen=1, D={8:7}, D={8:7}, found=0, i=0, j=0, k=0, l1=1, l2=1] [L13] FCALL A[i] VAL [\old(Alen)=1, \old(Blen)=1, A={0:9}, A={0:9}, Alen=1, B={10:6}, B={10:6}, Blen=1, D={8:7}, D={8:7}, found=0, i=0, j=0, k=0, l1=1, l2=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 36 locations, 9 error locations. UNSAFE Result, 0.4s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 28 SDtfs, 82 SDslu, 3 SDs, 0 SdLazy, 43 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 19 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 276 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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/diff_usafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_z3.epf_AutomizerC.xml/Csv-Benchmark-0-2018-02-04_20-21-00-799.csv Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/diff_usafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_z3.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-02-04_20-21-00-799.csv Received shutdown request...