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/cstrncat-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 14:21:23,502 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 14:21:23,504 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 14:21:23,517 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 14:21:23,517 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 14:21:23,518 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 14:21:23,518 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 14:21:23,520 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 14:21:23,521 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 14:21:23,522 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 14:21:23,522 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 14:21:23,522 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 14:21:23,523 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 14:21:23,524 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 14:21:23,525 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 14:21:23,528 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 14:21:23,530 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 14:21:23,532 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 14:21:23,533 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 14:21:23,534 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 14:21:23,537 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-23 14:21:23,537 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-23 14:21:23,538 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-23 14:21:23,539 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-23 14:21:23,539 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-23 14:21:23,541 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-23 14:21:23,541 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-23 14:21:23,542 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-23 14:21:23,542 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-23 14:21:23,542 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 14:21:23,543 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 14:21:23,543 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 14:21:23,553 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 14:21:23,553 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 14:21:23,554 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 14:21:23,554 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 14:21:23,554 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 14:21:23,554 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 14:21:23,555 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 14:21:23,555 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 14:21:23,555 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 14:21:23,556 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 14:21:23,556 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 14:21:23,556 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 14:21:23,556 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 14:21:23,556 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 14:21:23,557 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 14:21:23,557 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 14:21:23,557 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 14:21:23,557 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 14:21:23,557 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 14:21:23,557 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 14:21:23,558 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 14:21:23,558 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 14:21:23,558 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 14:21:23,558 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 14:21:23,558 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 14:21:23,559 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:21:23,559 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 14:21:23,559 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 14:21:23,559 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 14:21:23,559 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 14:21:23,560 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 14:21:23,560 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 14:21:23,560 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 14:21:23,560 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 14:21:23,560 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 14:21:23,561 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 14:21:23,561 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 14:21:23,594 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 14:21:23,606 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 14:21:23,610 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 14:21:23,612 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 14:21:23,612 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 14:21:23,613 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrncat-alloca_true-valid-memsafety_true-termination.i [2018-01-23 14:21:23,789 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 14:21:23,795 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 14:21:23,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 14:21:23,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 14:21:23,800 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 14:21:23,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:21:23" (1/1) ... [2018-01-23 14:21:23,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b2fa6e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:23, skipping insertion in model container [2018-01-23 14:21:23,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:21:23" (1/1) ... [2018-01-23 14:21:23,821 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:21:23,860 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:21:23,979 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:21:23,995 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:21:24,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:24 WrapperNode [2018-01-23 14:21:24,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 14:21:24,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 14:21:24,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 14:21:24,003 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 14:21:24,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:24" (1/1) ... [2018-01-23 14:21:24,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:24" (1/1) ... [2018-01-23 14:21:24,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:24" (1/1) ... [2018-01-23 14:21:24,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:24" (1/1) ... [2018-01-23 14:21:24,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:24" (1/1) ... [2018-01-23 14:21:24,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:24" (1/1) ... [2018-01-23 14:21:24,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:24" (1/1) ... [2018-01-23 14:21:24,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 14:21:24,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 14:21:24,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 14:21:24,042 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 14:21:24,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:24" (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 14:21:24,089 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 14:21:24,089 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 14:21:24,089 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrncat [2018-01-23 14:21:24,089 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 14:21:24,089 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-23 14:21:24,089 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-23 14:21:24,089 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 14:21:24,089 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 14:21:24,090 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 14:21:24,090 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-23 14:21:24,090 INFO L128 BoogieDeclarations]: Found specification of procedure cstrncat [2018-01-23 14:21:24,090 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 14:21:24,090 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 14:21:24,090 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 14:21:24,294 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 14:21:24,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:21:24 BoogieIcfgContainer [2018-01-23 14:21:24,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 14:21:24,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-23 14:21:24,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-23 14:21:24,297 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-23 14:21:24,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 02:21:23" (1/3) ... [2018-01-23 14:21:24,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e10458b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:21:24, skipping insertion in model container [2018-01-23 14:21:24,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:24" (2/3) ... [2018-01-23 14:21:24,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e10458b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:21:24, skipping insertion in model container [2018-01-23 14:21:24,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:21:24" (3/3) ... [2018-01-23 14:21:24,303 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrncat-alloca_true-valid-memsafety_true-termination.i [2018-01-23 14:21:24,311 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-23 14:21:24,316 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-23 14:21:24,361 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:21:24,361 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:21:24,361 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:21:24,362 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:21:24,362 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:21:24,362 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:21:24,362 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:21:24,362 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-23 14:21:24,363 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:21:24,383 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-23 14:21:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-23 14:21:24,390 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:24,391 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-23 14:21:24,391 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-23 14:21:24,396 INFO L82 PathProgramCache]: Analyzing trace with hash 118205, now seen corresponding path program 1 times [2018-01-23 14:21:24,398 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:24,399 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:24,456 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:24,457 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:24,457 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:21:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:21:24,520 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:21:24,527 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:21:24,534 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:21:24,535 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:21:24,535 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:21:24,535 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:21:24,535 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:21:24,535 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:21:24,535 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:21:24,535 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-23 14:21:24,535 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:21:24,537 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-23 14:21:24,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-23 14:21:24,539 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:24,539 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:21:24,539 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:21:24,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1650403995, now seen corresponding path program 1 times [2018-01-23 14:21:24,539 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:24,539 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:24,541 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:24,541 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:24,541 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:21:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:21:24,591 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:21:24,594 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:21:24,595 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:21:24,595 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:21:24,604 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:21:24,604 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:21:24,604 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:21:24,604 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:21:24,605 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:21:24,605 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:21:24,605 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:21:24,605 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-23 14:21:24,605 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:21:24,607 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-23 14:21:24,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-23 14:21:24,608 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:24,608 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:21:24,608 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-23 14:21:24,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1409537045, now seen corresponding path program 1 times [2018-01-23 14:21:24,609 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:24,609 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:24,610 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:24,611 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:24,611 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:21:24,631 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:21:24,778 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 14:21:24,780 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:21:24,781 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:21:24,782 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-23 14:21:24,796 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-23 14:21:24,797 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-23 14:21:24,800 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2018-01-23 14:21:24,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:21:24,878 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-23 14:21:24,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-23 14:21:24,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-01-23 14:21:24,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:21:24,889 INFO L225 Difference]: With dead ends: 72 [2018-01-23 14:21:24,889 INFO L226 Difference]: Without dead ends: 41 [2018-01-23 14:21:24,892 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-23 14:21:24,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-23 14:21:24,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-23 14:21:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-23 14:21:24,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2018-01-23 14:21:24,928 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 11 [2018-01-23 14:21:24,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:21:24,928 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2018-01-23 14:21:24,929 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-23 14:21:24,929 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2018-01-23 14:21:24,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-23 14:21:24,930 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:24,930 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:21:24,930 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-23 14:21:24,931 INFO L82 PathProgramCache]: Analyzing trace with hash 2049811947, now seen corresponding path program 1 times [2018-01-23 14:21:24,931 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:24,931 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:24,932 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:24,932 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:24,932 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:21:24,948 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:21:25,031 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 14:21:25,032 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:21:25,032 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-23 14:21:25,034 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-23 14:21:25,034 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-23 14:21:25,034 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:21:25,034 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 5 states. [2018-01-23 14:21:25,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:21:25,104 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2018-01-23 14:21:25,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:21:25,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2018-01-23 14:21:25,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:21:25,105 INFO L225 Difference]: With dead ends: 75 [2018-01-23 14:21:25,105 INFO L226 Difference]: Without dead ends: 41 [2018-01-23 14:21:25,106 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-23 14:21:25,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-23 14:21:25,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-23 14:21:25,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-23 14:21:25,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2018-01-23 14:21:25,113 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 36 [2018-01-23 14:21:25,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:21:25,113 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2018-01-23 14:21:25,113 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-23 14:21:25,114 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2018-01-23 14:21:25,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-23 14:21:25,115 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:25,115 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:21:25,115 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-23 14:21:25,116 INFO L82 PathProgramCache]: Analyzing trace with hash 2072444201, now seen corresponding path program 1 times [2018-01-23 14:21:25,116 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:25,116 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:25,117 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:25,117 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:25,117 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:21:25,143 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:21:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:21:25,227 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:21:25,228 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-23 14:21:25,228 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-23 14:21:25,228 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-23 14:21:25,228 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-23 14:21:25,229 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 6 states. [2018-01-23 14:21:25,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:21:25,323 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2018-01-23 14:21:25,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-23 14:21:25,324 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2018-01-23 14:21:25,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:21:25,327 INFO L225 Difference]: With dead ends: 81 [2018-01-23 14:21:25,327 INFO L226 Difference]: Without dead ends: 54 [2018-01-23 14:21:25,328 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-23 14:21:25,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-23 14:21:25,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2018-01-23 14:21:25,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-23 14:21:25,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-01-23 14:21:25,333 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 36 [2018-01-23 14:21:25,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:21:25,334 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-01-23 14:21:25,334 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-23 14:21:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-01-23 14:21:25,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-23 14:21:25,335 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:25,335 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:21:25,335 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-23 14:21:25,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1987871450, now seen corresponding path program 1 times [2018-01-23 14:21:25,335 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:25,335 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:25,336 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:25,336 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:25,336 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:21:25,363 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:21:25,589 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 14:21:25,590 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:21:25,590 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-23 14:21:25,590 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-23 14:21:25,591 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-23 14:21:25,591 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-01-23 14:21:25,591 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 7 states. [2018-01-23 14:21:25,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:21:25,751 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2018-01-23 14:21:25,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-23 14:21:25,752 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2018-01-23 14:21:25,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:21:25,753 INFO L225 Difference]: With dead ends: 44 [2018-01-23 14:21:25,753 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:21:25,754 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-01-23 14:21:25,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:21:25,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:21:25,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:21:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:21:25,754 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2018-01-23 14:21:25,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:21:25,755 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:21:25,755 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-23 14:21:25,755 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:21:25,755 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:21:25,758 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:21:25,758 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:21:25,758 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:21:25,758 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:21:25,759 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:21:25,759 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:21:25,759 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:21:25,759 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrncatErr0EnsuresViolation======== [2018-01-23 14:21:25,759 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:21:25,760 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-23 14:21:25,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-23 14:21:25,762 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:25,762 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, 1, 1, 1] [2018-01-23 14:21:25,762 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrncatErr0EnsuresViolation]=== [2018-01-23 14:21:25,762 INFO L82 PathProgramCache]: Analyzing trace with hash -821118556, now seen corresponding path program 1 times [2018-01-23 14:21:25,762 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:25,763 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:25,764 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:25,764 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:25,764 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:21:25,773 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:21:25,816 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 14:21:25,816 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:21:25,816 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-23 14:21:25,817 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-23 14:21:25,817 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-23 14:21:25,817 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:21:25,817 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 5 states. [2018-01-23 14:21:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:21:25,883 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2018-01-23 14:21:25,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:21:25,885 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2018-01-23 14:21:25,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:21:25,886 INFO L225 Difference]: With dead ends: 88 [2018-01-23 14:21:25,886 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:21:25,887 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-23 14:21:25,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:21:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:21:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:21:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:21:25,888 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2018-01-23 14:21:25,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:21:25,889 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:21:25,889 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-23 14:21:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:21:25,889 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:21:25,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.01 02:21:25 BoogieIcfgContainer [2018-01-23 14:21:25,893 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-23 14:21:25,894 INFO L168 Benchmark]: Toolchain (without parser) took 2104.91 ms. Allocated memory was 302.5 MB in the beginning and 460.8 MB in the end (delta: 158.3 MB). Free memory was 260.8 MB in the beginning and 320.2 MB in the end (delta: -59.4 MB). Peak memory consumption was 98.9 MB. Max. memory is 5.3 GB. [2018-01-23 14:21:25,896 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 302.5 MB. Free memory is still 266.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 14:21:25,896 INFO L168 Benchmark]: CACSL2BoogieTranslator took 207.36 ms. Allocated memory is still 302.5 MB. Free memory was 259.8 MB in the beginning and 249.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-01-23 14:21:25,896 INFO L168 Benchmark]: Boogie Preprocessor took 38.09 ms. Allocated memory is still 302.5 MB. Free memory was 249.8 MB in the beginning and 247.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:21:25,897 INFO L168 Benchmark]: RCFGBuilder took 253.06 ms. Allocated memory is still 302.5 MB. Free memory was 247.8 MB in the beginning and 230.2 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 5.3 GB. [2018-01-23 14:21:25,897 INFO L168 Benchmark]: TraceAbstraction took 1598.44 ms. Allocated memory was 302.5 MB in the beginning and 460.8 MB in the end (delta: 158.3 MB). Free memory was 229.2 MB in the beginning and 320.2 MB in the end (delta: -91.0 MB). Peak memory consumption was 67.3 MB. Max. memory is 5.3 GB. [2018-01-23 14:21:25,899 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 302.5 MB. Free memory is still 266.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 207.36 ms. Allocated memory is still 302.5 MB. Free memory was 259.8 MB in the beginning and 249.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 38.09 ms. Allocated memory is still 302.5 MB. Free memory was 249.8 MB in the beginning and 247.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 253.06 ms. Allocated memory is still 302.5 MB. Free memory was 247.8 MB in the beginning and 230.2 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1598.44 ms. Allocated memory was 302.5 MB in the beginning and 460.8 MB in the end (delta: 158.3 MB). Free memory was 229.2 MB in the beginning and 320.2 MB in the end (delta: -91.0 MB). Peak memory consumption was 67.3 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 4 procedures, 47 locations, 4 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=47occurred 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: [L554] int length1 = __VERIFIER_nondet_int(); [L555] int length2 = __VERIFIER_nondet_int(); [L556] int n = __VERIFIER_nondet_int(); [L557] COND TRUE length1 < 1 [L558] length1 = 1 VAL [length1=1, length2=0, n=0] [L560] COND TRUE length2 < 1 [L561] length2 = 1 VAL [length1=1, length2=1, n=0] [L563] COND TRUE n < 1 [L564] n = 1 VAL [length1=1, length2=1, n=1] [L566] COND TRUE length1 < n || length1 - n < length2 [L566] return 0; - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 47 locations, 4 error locations. UNSAFE Result, 0.0s 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=47occurred 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, 13 NumberOfCodeBlocks, 13 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 - PositiveResult [Line: 553]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 47 locations, 4 error locations. SAFE Result, 1.1s OverallTime, 4 OverallIterations, 1 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 180 SDtfs, 120 SDslu, 254 SDs, 0 SdLazy, 183 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred 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: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 122 NumberOfCodeBlocks, 122 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 118 ConstructedInterpolants, 0 QuantifiedInterpolants, 12432 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 540]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: cstrncatErr0EnsuresViolation CFG has 4 procedures, 47 locations, 4 error locations. SAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 52 SDtfs, 15 SDslu, 128 SDs, 0 SdLazy, 31 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred 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: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 759 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-23_14-21-25-909.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-23_14-21-25-909.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-23_14-21-25-909.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-23_14-21-25-909.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-23_14-21-25-909.csv Received shutdown request...