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_NoArray.epf -i ../../../trunk/examples/svcomp/array-memsafety/reverse_array_alloca_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ccafca9-m [2018-02-04 04:02:54,356 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-04 04:02:54,357 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-04 04:02:54,366 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-04 04:02:54,367 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-04 04:02:54,367 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-04 04:02:54,368 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-04 04:02:54,369 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-04 04:02:54,370 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-04 04:02:54,371 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-04 04:02:54,371 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-04 04:02:54,372 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-04 04:02:54,372 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-04 04:02:54,373 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-04 04:02:54,374 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-04 04:02:54,376 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-04 04:02:54,377 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-04 04:02:54,378 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-04 04:02:54,379 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-04 04:02:54,380 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-04 04:02:54,382 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-02-04 04:02:54,382 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-02-04 04:02:54,382 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-02-04 04:02:54,383 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-02-04 04:02:54,384 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-02-04 04:02:54,384 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-02-04 04:02:54,385 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-02-04 04:02:54,385 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-02-04 04:02:54,385 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-02-04 04:02:54,385 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-04 04:02:54,386 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-04 04:02:54,386 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_NoArray.epf [2018-02-04 04:02:54,395 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-04 04:02:54,395 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-04 04:02:54,396 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-04 04:02:54,396 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-04 04:02:54,396 INFO L133 SettingsManager]: * Use SBE=true [2018-02-04 04:02:54,397 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-04 04:02:54,397 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-04 04:02:54,397 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-04 04:02:54,397 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-04 04:02:54,397 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-04 04:02:54,397 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-04 04:02:54,398 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-04 04:02:54,398 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-04 04:02:54,398 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-04 04:02:54,398 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-04 04:02:54,398 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-04 04:02:54,398 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-04 04:02:54,398 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-04 04:02:54,399 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-04 04:02:54,399 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-04 04:02:54,399 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-04 04:02:54,399 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-04 04:02:54,399 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-04 04:02:54,399 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-04 04:02:54,399 INFO L133 SettingsManager]: * Trace refinement strategy=SMTINTERPOL [2018-02-04 04:02:54,427 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-04 04:02:54,438 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-04 04:02:54,442 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-04 04:02:54,443 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-04 04:02:54,443 INFO L276 PluginConnector]: CDTParser initialized [2018-02-04 04:02:54,444 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/reverse_array_alloca_unsafe_false-valid-deref.i [2018-02-04 04:02:54,568 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-04 04:02:54,569 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-04 04:02:54,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-04 04:02:54,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-04 04:02:54,575 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-04 04:02:54,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 04:02:54" (1/1) ... [2018-02-04 04:02:54,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40ee07db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:02:54, skipping insertion in model container [2018-02-04 04:02:54,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 04:02:54" (1/1) ... [2018-02-04 04:02:54,594 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 04:02:54,623 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 04:02:54,718 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 04:02:54,732 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 04:02:54,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:02:54 WrapperNode [2018-02-04 04:02:54,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-04 04:02:54,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-04 04:02:54,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-04 04:02:54,738 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-04 04:02:54,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:02:54" (1/1) ... [2018-02-04 04:02:54,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:02:54" (1/1) ... [2018-02-04 04:02:54,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:02:54" (1/1) ... [2018-02-04 04:02:54,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:02:54" (1/1) ... [2018-02-04 04:02:54,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:02:54" (1/1) ... [2018-02-04 04:02:54,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:02:54" (1/1) ... [2018-02-04 04:02:54,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:02:54" (1/1) ... [2018-02-04 04:02:54,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-04 04:02:54,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-04 04:02:54,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-04 04:02:54,768 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-04 04:02:54,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:02:54" (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 04:02:54,804 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-04 04:02:54,804 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-04 04:02:54,804 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-04 04:02:54,805 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-04 04:02:54,805 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-04 04:02:54,805 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-04 04:02:54,805 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-04 04:02:54,805 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-04 04:02:54,805 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-04 04:02:54,805 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-04 04:02:54,805 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-04 04:02:54,806 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-04 04:02:54,996 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-04 04:02:54,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 04:02:54 BoogieIcfgContainer [2018-02-04 04:02:54,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-04 04:02:54,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-04 04:02:54,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-04 04:02:54,999 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-04 04:02:54,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.02 04:02:54" (1/3) ... [2018-02-04 04:02:54,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28711f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 04:02:54, skipping insertion in model container [2018-02-04 04:02:54,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:02:54" (2/3) ... [2018-02-04 04:02:54,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28711f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 04:02:54, skipping insertion in model container [2018-02-04 04:02:55,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 04:02:54" (3/3) ... [2018-02-04 04:02:55,001 INFO L107 eAbstractionObserver]: Analyzing ICFG reverse_array_alloca_unsafe_false-valid-deref.i [2018-02-04 04:02:55,006 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-04 04:02:55,010 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2018-02-04 04:02:55,033 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-04 04:02:55,033 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-04 04:02:55,033 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-04 04:02:55,033 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-04 04:02:55,033 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-04 04:02:55,033 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-04 04:02:55,033 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-04 04:02:55,034 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-04 04:02:55,034 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-04 04:02:55,045 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-02-04 04:02:55,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-02-04 04:02:55,053 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 04:02:55,054 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 04:02:55,054 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]=== [2018-02-04 04:02:55,057 INFO L82 PathProgramCache]: Analyzing trace with hash -506470517, now seen corresponding path program 1 times [2018-02-04 04:02:55,058 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-04 04:02:55,059 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-04 04:02:55,089 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 04:02:55,089 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 04:02:55,089 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 04:02:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 04:02:55,132 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 04:02:55,162 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 04:02:55,164 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 04:02:55,165 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-02-04 04:02:55,166 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-02-04 04:02:55,179 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-02-04 04:02:55,180 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-02-04 04:02:55,181 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2018-02-04 04:02:55,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 04:02:55,195 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-02-04 04:02:55,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-02-04 04:02:55,196 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-02-04 04:02:55,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 04:02:55,203 INFO L225 Difference]: With dead ends: 63 [2018-02-04 04:02:55,203 INFO L226 Difference]: Without dead ends: 60 [2018-02-04 04:02:55,204 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 [2018-02-04 04:02:55,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-02-04 04:02:55,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-02-04 04:02:55,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-02-04 04:02:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2018-02-04 04:02:55,292 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 12 [2018-02-04 04:02:55,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 04:02:55,292 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2018-02-04 04:02:55,292 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-02-04 04:02:55,292 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2018-02-04 04:02:55,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-04 04:02:55,293 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 04:02:55,293 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 04:02:55,293 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]=== [2018-02-04 04:02:55,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258408, now seen corresponding path program 1 times [2018-02-04 04:02:55,293 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-04 04:02:55,293 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-04 04:02:55,294 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 04:02:55,295 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 04:02:55,295 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 04:02:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 04:02:55,309 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 04:02:55,352 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 04:02:55,352 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 04:02:55,352 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-04 04:02:55,353 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-04 04:02:55,353 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-04 04:02:55,353 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-04 04:02:55,354 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 4 states. [2018-02-04 04:02:55,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 04:02:55,430 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2018-02-04 04:02:55,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-04 04:02:55,430 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-02-04 04:02:55,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 04:02:55,431 INFO L225 Difference]: With dead ends: 56 [2018-02-04 04:02:55,431 INFO L226 Difference]: Without dead ends: 56 [2018-02-04 04:02:55,432 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-02-04 04:02:55,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-02-04 04:02:55,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-02-04 04:02:55,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-02-04 04:02:55,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2018-02-04 04:02:55,437 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 13 [2018-02-04 04:02:55,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 04:02:55,437 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2018-02-04 04:02:55,437 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-04 04:02:55,437 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2018-02-04 04:02:55,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-04 04:02:55,437 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 04:02:55,437 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 04:02:55,437 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]=== [2018-02-04 04:02:55,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258409, now seen corresponding path program 1 times [2018-02-04 04:02:55,438 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-04 04:02:55,438 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-04 04:02:55,439 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 04:02:55,439 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 04:02:55,439 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 04:02:55,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 04:02:55,455 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 04:02:55,496 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 04:02:55,496 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 04:02:55,496 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-04 04:02:55,497 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-04 04:02:55,497 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-04 04:02:55,497 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-02-04 04:02:55,498 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 4 states. [2018-02-04 04:02:55,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 04:02:55,547 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2018-02-04 04:02:55,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-04 04:02:55,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-02-04 04:02:55,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 04:02:55,550 INFO L225 Difference]: With dead ends: 68 [2018-02-04 04:02:55,550 INFO L226 Difference]: Without dead ends: 68 [2018-02-04 04:02:55,551 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 [2018-02-04 04:02:55,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-02-04 04:02:55,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2018-02-04 04:02:55,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-02-04 04:02:55,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2018-02-04 04:02:55,555 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 13 [2018-02-04 04:02:55,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 04:02:55,556 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2018-02-04 04:02:55,556 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-04 04:02:55,556 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2018-02-04 04:02:55,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-04 04:02:55,556 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 04:02:55,556 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 04:02:55,556 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]=== [2018-02-04 04:02:55,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258450, now seen corresponding path program 1 times [2018-02-04 04:02:55,557 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-04 04:02:55,557 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-04 04:02:55,557 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 04:02:55,558 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 04:02:55,558 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 04:02:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 04:02:55,568 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 04:02:55,635 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 04:02:55,636 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 04:02:55,636 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-02-04 04:02:55,636 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-02-04 04:02:55,636 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-02-04 04:02:55,636 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-02-04 04:02:55,637 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 6 states. [2018-02-04 04:02:55,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 04:02:55,788 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2018-02-04 04:02:55,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-04 04:02:55,789 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-02-04 04:02:55,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 04:02:55,790 INFO L225 Difference]: With dead ends: 65 [2018-02-04 04:02:55,790 INFO L226 Difference]: Without dead ends: 65 [2018-02-04 04:02:55,790 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-02-04 04:02:55,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-02-04 04:02:55,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2018-02-04 04:02:55,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-02-04 04:02:55,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2018-02-04 04:02:55,794 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 13 [2018-02-04 04:02:55,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 04:02:55,794 INFO L432 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2018-02-04 04:02:55,794 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-02-04 04:02:55,795 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2018-02-04 04:02:55,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-02-04 04:02:55,795 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 04:02:55,795 INFO L351 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 04:02:55,795 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr20EnsuresViolation, mainErr9RequiresViolation, mainErr18RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, mainErr19RequiresViolation]=== [2018-02-04 04:02:55,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1619006049, now seen corresponding path program 1 times [2018-02-04 04:02:55,796 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-04 04:02:55,796 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-04 04:02:55,797 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 04:02:55,797 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 04:02:55,797 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 04:02:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-04 04:02:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-04 04:02:55,837 INFO L410 BasicCegarLoop]: Counterexample might be feasible [2018-02-04 04:02:55,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.02 04:02:55 BoogieIcfgContainer [2018-02-04 04:02:55,852 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-04 04:02:55,853 INFO L168 Benchmark]: Toolchain (without parser) took 1284.61 ms. Allocated memory was 402.7 MB in the beginning and 616.0 MB in the end (delta: 213.4 MB). Free memory was 360.9 MB in the beginning and 525.7 MB in the end (delta: -164.8 MB). Peak memory consumption was 48.6 MB. Max. memory is 5.3 GB. [2018-02-04 04:02:55,854 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 402.7 MB. Free memory is still 366.1 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 04:02:55,854 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.37 ms. Allocated memory is still 402.7 MB. Free memory was 359.5 MB in the beginning and 349.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. [2018-02-04 04:02:55,854 INFO L168 Benchmark]: Boogie Preprocessor took 29.63 ms. Allocated memory is still 402.7 MB. Free memory was 349.0 MB in the beginning and 347.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. [2018-02-04 04:02:55,854 INFO L168 Benchmark]: RCFGBuilder took 228.26 ms. Allocated memory is still 402.7 MB. Free memory was 347.6 MB in the beginning and 325.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 5.3 GB. [2018-02-04 04:02:55,854 INFO L168 Benchmark]: TraceAbstraction took 855.51 ms. Allocated memory was 402.7 MB in the beginning and 616.0 MB in the end (delta: 213.4 MB). Free memory was 325.7 MB in the beginning and 525.7 MB in the end (delta: -200.0 MB). Peak memory consumption was 13.4 MB. Max. memory is 5.3 GB. [2018-02-04 04:02:55,855 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 402.7 MB. Free memory is still 366.1 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 168.37 ms. Allocated memory is still 402.7 MB. Free memory was 359.5 MB in the beginning and 349.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 29.63 ms. Allocated memory is still 402.7 MB. Free memory was 349.0 MB in the beginning and 347.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. * RCFGBuilder took 228.26 ms. Allocated memory is still 402.7 MB. Free memory was 347.6 MB in the beginning and 325.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 855.51 ms. Allocated memory was 402.7 MB in the beginning and 616.0 MB in the end (delta: 213.4 MB). Free memory was 325.7 MB in the beginning and 525.7 MB in the end (delta: -200.0 MB). Peak memory consumption was 13.4 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: [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*sizeof(int)) VAL [__builtin_alloca (length*sizeof(int))={7:0}, length=1] [L545] int *arr = __builtin_alloca (length*sizeof(int)); [L546] i=0 VAL [__builtin_alloca (length*sizeof(int))={7:0}, arr={7:0}, i=0, length=1] [L546] COND TRUE i