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/mempurity-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/array-memsafety/count_down_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 14:20:26,636 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 14:20:26,638 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 14:20:26,654 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 14:20:26,654 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 14:20:26,655 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 14:20:26,656 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 14:20:26,658 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 14:20:26,661 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 14:20:26,661 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 14:20:26,662 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 14:20:26,663 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 14:20:26,664 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 14:20:26,664 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 14:20:26,665 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 14:20:26,668 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 14:20:26,670 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 14:20:26,672 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 14:20:26,673 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 14:20:26,675 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 14:20:26,677 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-23 14:20:26,682 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 14:20:26,683 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 14:20:26,683 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-23 14:20:26,693 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 14:20:26,693 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 14:20:26,694 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 14:20:26,694 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 14:20:26,694 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 14:20:26,695 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 14:20:26,695 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 14:20:26,695 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 14:20:26,696 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 14:20:26,696 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 14:20:26,696 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 14:20:26,696 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 14:20:26,696 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 14:20:26,697 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 14:20:26,697 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 14:20:26,697 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 14:20:26,697 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 14:20:26,697 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 14:20:26,697 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 14:20:26,698 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 14:20:26,698 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 14:20:26,698 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 14:20:26,698 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 14:20:26,698 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 14:20:26,699 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 14:20:26,699 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:20:26,699 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 14:20:26,699 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 14:20:26,699 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 14:20:26,700 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 14:20:26,700 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 14:20:26,700 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 14:20:26,700 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 14:20:26,700 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 14:20:26,700 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 14:20:26,701 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 14:20:26,702 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 14:20:26,737 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 14:20:26,752 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 14:20:26,756 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 14:20:26,758 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 14:20:26,759 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 14:20:26,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/count_down_unsafe_false-valid-deref.i [2018-01-23 14:20:26,926 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 14:20:26,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 14:20:26,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 14:20:26,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 14:20:26,941 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 14:20:26,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:20:26" (1/1) ... [2018-01-23 14:20:26,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e99cb12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:20:26, skipping insertion in model container [2018-01-23 14:20:26,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:20:26" (1/1) ... [2018-01-23 14:20:26,962 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:20:27,000 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:20:27,114 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:20:27,129 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:20:27,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:20:27 WrapperNode [2018-01-23 14:20:27,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 14:20:27,136 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 14:20:27,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 14:20:27,136 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 14:20:27,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:20:27" (1/1) ... [2018-01-23 14:20:27,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:20:27" (1/1) ... [2018-01-23 14:20:27,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:20:27" (1/1) ... [2018-01-23 14:20:27,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:20:27" (1/1) ... [2018-01-23 14:20:27,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:20:27" (1/1) ... [2018-01-23 14:20:27,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:20:27" (1/1) ... [2018-01-23 14:20:27,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:20:27" (1/1) ... [2018-01-23 14:20:27,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 14:20:27,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 14:20:27,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 14:20:27,167 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 14:20:27,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:20:27" (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 [2018-01-23 14:20:27,214 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 14:20:27,215 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 14:20:27,215 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 14:20:27,215 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-23 14:20:27,215 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-23 14:20:27,215 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 14:20:27,215 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 14:20:27,215 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 14:20:27,215 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-23 14:20:27,216 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 14:20:27,216 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 14:20:27,216 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 14:20:27,393 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 14:20:27,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:20:27 BoogieIcfgContainer [2018-01-23 14:20:27,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 14:20:27,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-23 14:20:27,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-23 14:20:27,396 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-23 14:20:27,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 02:20:26" (1/3) ... [2018-01-23 14:20:27,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@baf4b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:20:27, skipping insertion in model container [2018-01-23 14:20:27,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:20:27" (2/3) ... [2018-01-23 14:20:27,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@baf4b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:20:27, skipping insertion in model container [2018-01-23 14:20:27,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:20:27" (3/3) ... [2018-01-23 14:20:27,399 INFO L105 eAbstractionObserver]: Analyzing ICFG count_down_unsafe_false-valid-deref.i [2018-01-23 14:20:27,406 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-23 14:20:27,412 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-23 14:20:27,455 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:20:27,455 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:20:27,455 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:20:27,455 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:20:27,455 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:20:27,455 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:20:27,455 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:20:27,455 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-23 14:20:27,456 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:20:27,471 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2018-01-23 14:20:27,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-23 14:20:27,476 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:20:27,477 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-23 14:20:27,477 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-23 14:20:27,483 INFO L82 PathProgramCache]: Analyzing trace with hash 106673, now seen corresponding path program 1 times [2018-01-23 14:20:27,485 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:20:27,486 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:20:27,531 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:20:27,531 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:20:27,531 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:20:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:20:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:20:27,585 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:20:27,592 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:20:27,598 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:20:27,598 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:20:27,598 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:20:27,598 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:20:27,598 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:20:27,598 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:20:27,598 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:20:27,598 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-23 14:20:27,599 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:20:27,600 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2018-01-23 14:20:27,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-23 14:20:27,601 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:20:27,601 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:20:27,601 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:20:27,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1701202051, now seen corresponding path program 1 times [2018-01-23 14:20:27,602 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:20:27,602 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:20:27,603 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:20:27,603 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:20:27,603 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:20:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:20:27,631 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:20:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:20:27,724 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:20:27,724 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-23 14:20:27,726 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-23 14:20:27,740 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-23 14:20:27,741 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-23 14:20:27,744 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2018-01-23 14:20:27,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:20:27,869 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2018-01-23 14:20:27,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:20:27,871 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-01-23 14:20:27,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:20:27,883 INFO L225 Difference]: With dead ends: 58 [2018-01-23 14:20:27,883 INFO L226 Difference]: Without dead ends: 33 [2018-01-23 14:20:27,886 INFO L525 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 [2018-01-23 14:20:27,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-01-23 14:20:27,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-01-23 14:20:27,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-01-23 14:20:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2018-01-23 14:20:27,919 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 15 [2018-01-23 14:20:27,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:20:27,919 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2018-01-23 14:20:27,920 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-23 14:20:27,920 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2018-01-23 14:20:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-23 14:20:27,920 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:20:27,920 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:20:27,921 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:20:27,921 INFO L82 PathProgramCache]: Analyzing trace with hash 83400416, now seen corresponding path program 1 times [2018-01-23 14:20:27,921 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:20:27,921 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:20:27,922 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:20:27,922 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:20:27,923 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:20:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:20:27,940 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:20:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:20:28,009 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:20:28,009 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-23 14:20:28,011 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-23 14:20:28,011 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-23 14:20:28,011 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-23 14:20:28,011 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 4 states. [2018-01-23 14:20:28,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:20:28,051 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2018-01-23 14:20:28,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-23 14:20:28,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2018-01-23 14:20:28,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:20:28,054 INFO L225 Difference]: With dead ends: 56 [2018-01-23 14:20:28,054 INFO L226 Difference]: Without dead ends: 38 [2018-01-23 14:20:28,055 INFO L525 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 [2018-01-23 14:20:28,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-01-23 14:20:28,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2018-01-23 14:20:28,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-23 14:20:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2018-01-23 14:20:28,063 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 21 [2018-01-23 14:20:28,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:20:28,063 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2018-01-23 14:20:28,063 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-23 14:20:28,063 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2018-01-23 14:20:28,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-23 14:20:28,064 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:20:28,065 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:20:28,065 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:20:28,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2028475934, now seen corresponding path program 1 times [2018-01-23 14:20:28,065 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:20:28,065 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:20:28,066 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:20:28,067 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:20:28,067 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:20:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:20:28,086 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:20:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-23 14:20:28,143 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:20:28,143 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-23 14:20:28,144 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-23 14:20:28,144 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-23 14:20:28,144 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-23 14:20:28,145 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 4 states. [2018-01-23 14:20:28,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:20:28,181 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2018-01-23 14:20:28,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-23 14:20:28,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2018-01-23 14:20:28,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:20:28,183 INFO L225 Difference]: With dead ends: 52 [2018-01-23 14:20:28,183 INFO L226 Difference]: Without dead ends: 45 [2018-01-23 14:20:28,184 INFO L525 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 [2018-01-23 14:20:28,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-23 14:20:28,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2018-01-23 14:20:28,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-23 14:20:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2018-01-23 14:20:28,191 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 26 [2018-01-23 14:20:28,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:20:28,192 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2018-01-23 14:20:28,192 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-23 14:20:28,192 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2018-01-23 14:20:28,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-23 14:20:28,193 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:20:28,193 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:20:28,193 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:20:28,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1502089971, now seen corresponding path program 1 times [2018-01-23 14:20:28,194 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:20:28,194 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:20:28,195 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:20:28,195 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:20:28,195 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:20:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:20:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:20:28,240 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:20:28,247 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:20:28,251 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:20:28,251 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:20:28,260 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:20:28,260 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:20:28,260 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:20:28,260 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:20:28,261 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:20:28,261 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:20:28,261 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:20:28,261 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-23 14:20:28,261 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:20:28,262 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2018-01-23 14:20:28,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-23 14:20:28,263 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:20:28,263 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:20:28,263 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-23 14:20:28,263 INFO L82 PathProgramCache]: Analyzing trace with hash -909960591, now seen corresponding path program 1 times [2018-01-23 14:20:28,263 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:20:28,264 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:20:28,265 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:20:28,265 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:20:28,265 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:20:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:20:28,273 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:20:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:20:28,320 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:20:28,320 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-23 14:20:28,320 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-23 14:20:28,320 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-23 14:20:28,320 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-23 14:20:28,321 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2018-01-23 14:20:28,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:20:28,339 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2018-01-23 14:20:28,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:20:28,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-23 14:20:28,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:20:28,340 INFO L225 Difference]: With dead ends: 58 [2018-01-23 14:20:28,340 INFO L226 Difference]: Without dead ends: 31 [2018-01-23 14:20:28,340 INFO L525 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 [2018-01-23 14:20:28,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-01-23 14:20:28,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-01-23 14:20:28,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-01-23 14:20:28,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2018-01-23 14:20:28,343 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 13 [2018-01-23 14:20:28,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:20:28,344 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2018-01-23 14:20:28,344 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-23 14:20:28,344 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2018-01-23 14:20:28,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-23 14:20:28,344 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:20:28,344 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:20:28,344 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-23 14:20:28,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1600085006, now seen corresponding path program 1 times [2018-01-23 14:20:28,345 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:20:28,345 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:20:28,345 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:20:28,345 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:20:28,346 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:20:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:20:28,354 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:20:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:20:28,379 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:20:28,379 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-23 14:20:28,379 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-23 14:20:28,379 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-23 14:20:28,380 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-23 14:20:28,380 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2018-01-23 14:20:28,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:20:28,403 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2018-01-23 14:20:28,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-23 14:20:28,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-01-23 14:20:28,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:20:28,404 INFO L225 Difference]: With dead ends: 52 [2018-01-23 14:20:28,404 INFO L226 Difference]: Without dead ends: 36 [2018-01-23 14:20:28,405 INFO L525 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 [2018-01-23 14:20:28,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-23 14:20:28,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-01-23 14:20:28,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-01-23 14:20:28,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2018-01-23 14:20:28,410 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 19 [2018-01-23 14:20:28,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:20:28,410 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2018-01-23 14:20:28,410 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-23 14:20:28,410 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2018-01-23 14:20:28,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-23 14:20:28,411 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:20:28,411 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:20:28,411 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-23 14:20:28,412 INFO L82 PathProgramCache]: Analyzing trace with hash 266045328, now seen corresponding path program 1 times [2018-01-23 14:20:28,412 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:20:28,412 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:20:28,413 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:20:28,413 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:20:28,413 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:20:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:20:28,424 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:20:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-23 14:20:28,463 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:20:28,464 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-23 14:20:28,464 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-23 14:20:28,464 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-23 14:20:28,464 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-23 14:20:28,464 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 4 states. [2018-01-23 14:20:28,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:20:28,496 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2018-01-23 14:20:28,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-23 14:20:28,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2018-01-23 14:20:28,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:20:28,497 INFO L225 Difference]: With dead ends: 48 [2018-01-23 14:20:28,497 INFO L226 Difference]: Without dead ends: 43 [2018-01-23 14:20:28,497 INFO L525 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 [2018-01-23 14:20:28,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-23 14:20:28,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2018-01-23 14:20:28,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-23 14:20:28,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2018-01-23 14:20:28,502 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 24 [2018-01-23 14:20:28,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:20:28,503 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2018-01-23 14:20:28,503 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-23 14:20:28,503 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2018-01-23 14:20:28,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-23 14:20:28,504 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:20:28,504 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:20:28,504 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-23 14:20:28,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1941225697, now seen corresponding path program 1 times [2018-01-23 14:20:28,505 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:20:28,505 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:20:28,506 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:20:28,506 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:20:28,506 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:20:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:20:28,521 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:20:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-23 14:20:28,590 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:20:28,590 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-23 14:20:28,590 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-23 14:20:28,590 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-23 14:20:28,591 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-23 14:20:28,591 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 4 states. [2018-01-23 14:20:28,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:20:28,675 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2018-01-23 14:20:28,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:20:28,675 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2018-01-23 14:20:28,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:20:28,676 INFO L225 Difference]: With dead ends: 35 [2018-01-23 14:20:28,676 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:20:28,676 INFO L525 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 [2018-01-23 14:20:28,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:20:28,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:20:28,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:20:28,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:20:28,677 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2018-01-23 14:20:28,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:20:28,677 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:20:28,677 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-23 14:20:28,678 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:20:28,678 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:20:28,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.01 02:20:28 BoogieIcfgContainer [2018-01-23 14:20:28,681 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-23 14:20:28,682 INFO L168 Benchmark]: Toolchain (without parser) took 1754.03 ms. Allocated memory was 299.4 MB in the beginning and 453.0 MB in the end (delta: 153.6 MB). Free memory was 257.7 MB in the beginning and 348.5 MB in the end (delta: -90.8 MB). Peak memory consumption was 62.8 MB. Max. memory is 5.3 GB. [2018-01-23 14:20:28,683 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 299.4 MB. Free memory is still 263.7 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 14:20:28,683 INFO L168 Benchmark]: CACSL2BoogieTranslator took 201.25 ms. Allocated memory is still 299.4 MB. Free memory was 256.7 MB in the beginning and 246.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:20:28,684 INFO L168 Benchmark]: Boogie Preprocessor took 30.61 ms. Allocated memory is still 299.4 MB. Free memory was 246.6 MB in the beginning and 245.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. [2018-01-23 14:20:28,684 INFO L168 Benchmark]: RCFGBuilder took 227.00 ms. Allocated memory is still 299.4 MB. Free memory was 245.6 MB in the beginning and 230.0 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.6 MB. Max. memory is 5.3 GB. [2018-01-23 14:20:28,684 INFO L168 Benchmark]: TraceAbstraction took 1287.22 ms. Allocated memory was 299.4 MB in the beginning and 453.0 MB in the end (delta: 153.6 MB). Free memory was 230.0 MB in the beginning and 348.5 MB in the end (delta: -118.4 MB). Peak memory consumption was 35.2 MB. Max. memory is 5.3 GB. [2018-01-23 14:20:28,686 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 299.4 MB. Free memory is still 263.7 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 201.25 ms. Allocated memory is still 299.4 MB. Free memory was 256.7 MB in the beginning and 246.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 30.61 ms. Allocated memory is still 299.4 MB. Free memory was 246.6 MB in the beginning and 245.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. * RCFGBuilder took 227.00 ms. Allocated memory is still 299.4 MB. Free memory was 245.6 MB in the beginning and 230.0 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1287.22 ms. Allocated memory was 299.4 MB in the beginning and 453.0 MB in the end (delta: 153.6 MB). Free memory was 230.0 MB in the beginning and 348.5 MB in the end (delta: -118.4 MB). Peak memory consumption was 35.2 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 3 procedures, 38 locations, 3 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred 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, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L541] int i, j; [L542] int val; [L543] int length = __VERIFIER_nondet_int(); [L544] COND TRUE length < 1 [L544] length = 1 VAL [length=1] [L545] EXPR, FCALL __builtin_alloca (length) VAL [__builtin_alloca (length)={3:0}, length=1] [L545] int *arr = __builtin_alloca (length); VAL [__builtin_alloca (length)={3:0}, arr={3:0}, length=1] [L546] COND FALSE !(!arr) [L547] i=0 VAL [__builtin_alloca (length)={3:0}, arr={3:0}, i=0, length=1] [L547] COND TRUE i 0) [L554] j++ VAL [__builtin_alloca (length)={3:0}, arr={3:0}, i=1, j=1, length=1, val=0] [L554] COND FALSE !(j