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/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_SS.epf -i ../../../trunk/examples/svcomp/array-memsafety/count_down_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cceb4a [2018-01-29 22:33:10,812 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-29 22:33:10,813 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-29 22:33:10,829 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-29 22:33:10,829 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-29 22:33:10,831 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-29 22:33:10,832 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-29 22:33:10,833 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-29 22:33:10,835 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-29 22:33:10,836 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-29 22:33:10,837 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-29 22:33:10,838 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-29 22:33:10,838 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-29 22:33:10,840 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-29 22:33:10,841 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-29 22:33:10,844 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-29 22:33:10,846 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-29 22:33:10,848 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-29 22:33:10,850 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-29 22:33:10,851 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-29 22:33:10,853 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-29 22:33:10,858 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-29 22:33:10,859 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-29 22:33:10,859 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_SS.epf [2018-01-29 22:33:10,868 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-29 22:33:10,868 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-29 22:33:10,869 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-29 22:33:10,869 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-29 22:33:10,869 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-29 22:33:10,870 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-29 22:33:10,870 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-29 22:33:10,870 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-29 22:33:10,870 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-29 22:33:10,871 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-29 22:33:10,871 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-29 22:33:10,871 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-29 22:33:10,871 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-29 22:33:10,871 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-29 22:33:10,871 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-29 22:33:10,871 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-29 22:33:10,871 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-29 22:33:10,872 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-29 22:33:10,872 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-29 22:33:10,872 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-01-29 22:33:10,872 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-29 22:33:10,872 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-29 22:33:10,872 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-29 22:33:10,873 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-29 22:33:10,873 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-29 22:33:10,873 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-29 22:33:10,873 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-29 22:33:10,873 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-29 22:33:10,873 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-29 22:33:10,874 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-29 22:33:10,874 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-29 22:33:10,874 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-29 22:33:10,874 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-29 22:33:10,875 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-29 22:33:10,907 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-29 22:33:10,917 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-29 22:33:10,920 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-29 22:33:10,921 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-29 22:33:10,922 INFO L276 PluginConnector]: CDTParser initialized [2018-01-29 22:33:10,922 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/count_down_unsafe_false-valid-deref.i [2018-01-29 22:33:11,077 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-29 22:33:11,081 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-29 22:33:11,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-29 22:33:11,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-29 22:33:11,088 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-29 22:33:11,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 10:33:11" (1/1) ... [2018-01-29 22:33:11,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67a116ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:11, skipping insertion in model container [2018-01-29 22:33:11,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 10:33:11" (1/1) ... [2018-01-29 22:33:11,105 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-29 22:33:11,142 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-29 22:33:11,282 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-29 22:33:11,298 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-29 22:33:11,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:11 WrapperNode [2018-01-29 22:33:11,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-29 22:33:11,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-29 22:33:11,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-29 22:33:11,305 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-29 22:33:11,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:11" (1/1) ... [2018-01-29 22:33:11,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:11" (1/1) ... [2018-01-29 22:33:11,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:11" (1/1) ... [2018-01-29 22:33:11,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:11" (1/1) ... [2018-01-29 22:33:11,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:11" (1/1) ... [2018-01-29 22:33:11,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:11" (1/1) ... [2018-01-29 22:33:11,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:11" (1/1) ... [2018-01-29 22:33:11,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-29 22:33:11,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-29 22:33:11,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-29 22:33:11,343 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-29 22:33:11,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:11" (1/1) ... No working directory specified, using /storage/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 [2018-01-29 22:33:11,388 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-29 22:33:11,388 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-29 22:33:11,388 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-29 22:33:11,388 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-29 22:33:11,389 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-29 22:33:11,389 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-29 22:33:11,389 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-29 22:33:11,389 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-29 22:33:11,389 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-29 22:33:11,389 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-29 22:33:11,389 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-29 22:33:11,389 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-29 22:33:11,608 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-29 22:33:11,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 10:33:11 BoogieIcfgContainer [2018-01-29 22:33:11,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-29 22:33:11,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-29 22:33:11,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-29 22:33:11,614 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-29 22:33:11,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.01 10:33:11" (1/3) ... [2018-01-29 22:33:11,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0d6333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 10:33:11, skipping insertion in model container [2018-01-29 22:33:11,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:11" (2/3) ... [2018-01-29 22:33:11,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0d6333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 10:33:11, skipping insertion in model container [2018-01-29 22:33:11,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 10:33:11" (3/3) ... [2018-01-29 22:33:11,617 INFO L107 eAbstractionObserver]: Analyzing ICFG count_down_unsafe_false-valid-deref.i [2018-01-29 22:33:11,626 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-29 22:33:11,634 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-01-29 22:33:11,681 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-29 22:33:11,681 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-29 22:33:11,681 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-29 22:33:11,681 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-29 22:33:11,681 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-29 22:33:11,682 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-29 22:33:11,682 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-29 22:33:11,682 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-29 22:33:11,682 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-29 22:33:11,700 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-01-29 22:33:11,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-29 22:33:11,706 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:33:11,707 INFO L350 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:33:11,708 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-01-29 22:33:11,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1229773359, now seen corresponding path program 1 times [2018-01-29 22:33:11,714 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:33:11,714 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:33:11,756 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:33:11,757 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:33:11,757 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:33:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:33:11,812 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:33:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:33:11,910 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-29 22:33:11,911 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-29 22:33:11,912 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-29 22:33:11,923 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-29 22:33:11,923 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-29 22:33:11,926 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 4 states. [2018-01-29 22:33:12,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:33:12,079 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2018-01-29 22:33:12,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-29 22:33:12,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-01-29 22:33:12,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:33:12,090 INFO L225 Difference]: With dead ends: 94 [2018-01-29 22:33:12,090 INFO L226 Difference]: Without dead ends: 58 [2018-01-29 22:33:12,092 INFO L553 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-29 22:33:12,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-01-29 22:33:12,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-01-29 22:33:12,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-29 22:33:12,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2018-01-29 22:33:12,121 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 20 [2018-01-29 22:33:12,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:33:12,121 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2018-01-29 22:33:12,121 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-29 22:33:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2018-01-29 22:33:12,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-29 22:33:12,122 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:33:12,122 INFO L350 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:33:12,122 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-01-29 22:33:12,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1445043224, now seen corresponding path program 1 times [2018-01-29 22:33:12,123 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:33:12,123 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:33:12,123 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:33:12,124 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:33:12,124 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:33:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:33:12,135 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:33:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:33:12,228 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-29 22:33:12,228 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-29 22:33:12,229 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-29 22:33:12,230 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-29 22:33:12,230 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-29 22:33:12,230 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 4 states. [2018-01-29 22:33:12,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:33:12,288 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-01-29 22:33:12,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-29 22:33:12,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2018-01-29 22:33:12,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:33:12,290 INFO L225 Difference]: With dead ends: 58 [2018-01-29 22:33:12,290 INFO L226 Difference]: Without dead ends: 54 [2018-01-29 22:33:12,291 INFO L553 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 [2018-01-29 22:33:12,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-29 22:33:12,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-01-29 22:33:12,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-29 22:33:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2018-01-29 22:33:12,298 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 24 [2018-01-29 22:33:12,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:33:12,299 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2018-01-29 22:33:12,299 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-29 22:33:12,299 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2018-01-29 22:33:12,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-29 22:33:12,300 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:33:12,300 INFO L350 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:33:12,300 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-01-29 22:33:12,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1445043223, now seen corresponding path program 1 times [2018-01-29 22:33:12,301 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:33:12,301 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:33:12,302 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:33:12,302 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:33:12,302 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:33:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:33:12,316 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:33:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:33:12,361 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-29 22:33:12,361 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-29 22:33:12,362 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-29 22:33:12,362 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-29 22:33:12,362 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-29 22:33:12,362 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 4 states. [2018-01-29 22:33:12,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:33:12,406 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2018-01-29 22:33:12,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-29 22:33:12,407 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2018-01-29 22:33:12,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:33:12,408 INFO L225 Difference]: With dead ends: 89 [2018-01-29 22:33:12,408 INFO L226 Difference]: Without dead ends: 65 [2018-01-29 22:33:12,408 INFO L553 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 [2018-01-29 22:33:12,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-01-29 22:33:12,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2018-01-29 22:33:12,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-29 22:33:12,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2018-01-29 22:33:12,415 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 24 [2018-01-29 22:33:12,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:33:12,415 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2018-01-29 22:33:12,415 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-29 22:33:12,415 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2018-01-29 22:33:12,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-29 22:33:12,416 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:33:12,416 INFO L350 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:33:12,416 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-01-29 22:33:12,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1406967281, now seen corresponding path program 1 times [2018-01-29 22:33:12,416 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:33:12,416 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:33:12,417 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:33:12,417 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:33:12,417 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:33:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-29 22:33:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-29 22:33:12,468 INFO L409 BasicCegarLoop]: Counterexample might be feasible [2018-01-29 22:33:12,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.01 10:33:12 BoogieIcfgContainer [2018-01-29 22:33:12,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-29 22:33:12,495 INFO L168 Benchmark]: Toolchain (without parser) took 1417.20 ms. Allocated memory was 307.8 MB in the beginning and 471.3 MB in the end (delta: 163.6 MB). Free memory was 267.8 MB in the beginning and 410.1 MB in the end (delta: -142.3 MB). Peak memory consumption was 21.2 MB. Max. memory is 5.3 GB. [2018-01-29 22:33:12,496 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 307.8 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-29 22:33:12,496 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.66 ms. Allocated memory is still 307.8 MB. Free memory was 266.8 MB in the beginning and 256.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-29 22:33:12,497 INFO L168 Benchmark]: Boogie Preprocessor took 37.18 ms. Allocated memory is still 307.8 MB. Free memory was 256.8 MB in the beginning and 254.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-29 22:33:12,497 INFO L168 Benchmark]: RCFGBuilder took 266.75 ms. Allocated memory is still 307.8 MB. Free memory was 254.8 MB in the beginning and 237.1 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 5.3 GB. [2018-01-29 22:33:12,497 INFO L168 Benchmark]: TraceAbstraction took 884.15 ms. Allocated memory was 307.8 MB in the beginning and 471.3 MB in the end (delta: 163.6 MB). Free memory was 237.1 MB in the beginning and 410.1 MB in the end (delta: -173.0 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-29 22:33:12,499 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 307.8 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 222.66 ms. Allocated memory is still 307.8 MB. Free memory was 266.8 MB in the beginning and 256.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 37.18 ms. Allocated memory is still 307.8 MB. Free memory was 256.8 MB in the beginning and 254.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 266.75 ms. Allocated memory is still 307.8 MB. Free memory was 254.8 MB in the beginning and 237.1 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 5.3 GB. * TraceAbstraction took 884.15 ms. Allocated memory was 307.8 MB in the beginning and 471.3 MB in the end (delta: 163.6 MB). Free memory was 237.1 MB in the beginning and 410.1 MB in the end (delta: -173.0 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; [L542] int val; [L543] int length = __VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=2, length=2] [L544] COND FALSE !(length < 1) VAL [length=2] [L545] EXPR, FCALL __builtin_alloca (length) VAL [__builtin_alloca (length)={3:0}, length=2] [L545] int *arr = __builtin_alloca (length); VAL [__builtin_alloca (length)={3:0}, arr={3:0}, length=2] [L546] COND FALSE !(!arr) VAL [__builtin_alloca (length)={3:0}, arr={3:0}, length=2] [L547] i=0 VAL [__builtin_alloca (length)={3:0}, arr={3:0}, i=0, length=2] [L547] COND TRUE i