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/openbsd_cstrncat-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 14:22:10,186 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 14:22:10,188 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 14:22:10,203 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 14:22:10,203 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 14:22:10,204 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 14:22:10,204 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 14:22:10,206 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 14:22:10,207 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 14:22:10,208 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 14:22:10,208 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 14:22:10,208 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 14:22:10,209 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 14:22:10,210 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 14:22:10,210 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 14:22:10,213 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 14:22:10,215 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 14:22:10,217 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 14:22:10,219 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 14:22:10,220 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 14:22:10,222 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-23 14:22:10,227 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 14:22:10,228 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 14:22:10,228 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 14:22:10,238 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 14:22:10,238 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 14:22:10,239 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 14:22:10,239 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 14:22:10,240 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 14:22:10,240 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 14:22:10,240 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 14:22:10,240 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 14:22:10,241 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 14:22:10,241 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 14:22:10,241 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 14:22:10,241 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 14:22:10,241 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 14:22:10,242 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 14:22:10,242 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 14:22:10,242 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 14:22:10,242 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 14:22:10,242 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 14:22:10,242 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 14:22:10,243 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 14:22:10,243 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 14:22:10,243 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 14:22:10,243 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 14:22:10,243 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 14:22:10,244 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 14:22:10,244 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:22:10,244 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 14:22:10,244 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 14:22:10,244 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 14:22:10,245 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 14:22:10,245 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 14:22:10,245 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 14:22:10,245 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 14:22:10,245 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 14:22:10,245 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 14:22:10,246 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 14:22:10,246 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 14:22:10,281 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 14:22:10,294 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 14:22:10,298 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 14:22:10,299 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 14:22:10,300 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 14:22:10,300 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrncat-alloca_true-valid-memsafety_true-termination.i [2018-01-23 14:22:10,462 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 14:22:10,468 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 14:22:10,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 14:22:10,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 14:22:10,473 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 14:22:10,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:22:10" (1/1) ... [2018-01-23 14:22:10,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55297a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:10, skipping insertion in model container [2018-01-23 14:22:10,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:22:10" (1/1) ... [2018-01-23 14:22:10,490 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:22:10,526 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:22:10,645 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:22:10,662 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:22:10,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:10 WrapperNode [2018-01-23 14:22:10,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 14:22:10,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 14:22:10,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 14:22:10,671 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 14:22:10,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:10" (1/1) ... [2018-01-23 14:22:10,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:10" (1/1) ... [2018-01-23 14:22:10,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:10" (1/1) ... [2018-01-23 14:22:10,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:10" (1/1) ... [2018-01-23 14:22:10,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:10" (1/1) ... [2018-01-23 14:22:10,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:10" (1/1) ... [2018-01-23 14:22:10,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:10" (1/1) ... [2018-01-23 14:22:10,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 14:22:10,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 14:22:10,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 14:22:10,701 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 14:22:10,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:10" (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 14:22:10,750 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 14:22:10,750 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 14:22:10,750 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrncat [2018-01-23 14:22:10,750 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 14:22:10,750 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-23 14:22:10,750 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-23 14:22:10,751 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 14:22:10,751 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 14:22:10,751 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 14:22:10,751 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-23 14:22:10,751 INFO L128 BoogieDeclarations]: Found specification of procedure cstrncat [2018-01-23 14:22:10,751 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 14:22:10,752 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 14:22:10,752 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 14:22:10,960 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 14:22:10,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:22:10 BoogieIcfgContainer [2018-01-23 14:22:10,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 14:22:10,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-23 14:22:10,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-23 14:22:10,965 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-23 14:22:10,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 02:22:10" (1/3) ... [2018-01-23 14:22:10,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e8d1ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:22:10, skipping insertion in model container [2018-01-23 14:22:10,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:22:10" (2/3) ... [2018-01-23 14:22:10,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e8d1ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:22:10, skipping insertion in model container [2018-01-23 14:22:10,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:22:10" (3/3) ... [2018-01-23 14:22:10,968 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncat-alloca_true-valid-memsafety_true-termination.i [2018-01-23 14:22:10,975 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-23 14:22:10,981 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-23 14:22:11,028 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:22:11,028 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:22:11,028 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:22:11,028 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:22:11,029 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:22:11,029 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:22:11,029 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:22:11,029 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-23 14:22:11,030 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:22:11,051 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2018-01-23 14:22:11,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-23 14:22:11,057 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:11,059 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-23 14:22:11,059 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-23 14:22:11,064 INFO L82 PathProgramCache]: Analyzing trace with hash 115322, now seen corresponding path program 1 times [2018-01-23 14:22:11,066 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:11,067 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:11,126 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:11,127 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:22:11,127 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:22:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:22:11,192 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:22:11,200 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:22:11,207 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:22:11,208 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:22:11,208 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:22:11,208 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:22:11,208 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:22:11,208 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:22:11,208 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:22:11,208 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-23 14:22:11,208 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:22:11,210 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2018-01-23 14:22:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-23 14:22:11,212 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:11,212 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:22:11,212 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:22:11,212 INFO L82 PathProgramCache]: Analyzing trace with hash -47417765, now seen corresponding path program 1 times [2018-01-23 14:22:11,212 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:11,213 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:11,214 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:11,214 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:22:11,214 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:22:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:22:11,268 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:22:11,271 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:22:11,272 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:22:11,273 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:22:11,280 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:22:11,280 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:22:11,281 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:22:11,281 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:22:11,281 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:22:11,281 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:22:11,281 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:22:11,281 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-23 14:22:11,282 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:22:11,284 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2018-01-23 14:22:11,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-23 14:22:11,285 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:11,285 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:22:11,285 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-23 14:22:11,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1090550926, now seen corresponding path program 1 times [2018-01-23 14:22:11,286 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:11,286 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:11,287 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:11,287 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:22:11,287 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:11,308 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:11,453 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 14:22:11,455 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:22:11,455 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:22:11,456 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-23 14:22:11,467 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-23 14:22:11,468 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-23 14:22:11,470 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2018-01-23 14:22:11,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:11,546 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2018-01-23 14:22:11,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-23 14:22:11,548 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-01-23 14:22:11,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:11,557 INFO L225 Difference]: With dead ends: 67 [2018-01-23 14:22:11,557 INFO L226 Difference]: Without dead ends: 39 [2018-01-23 14:22:11,560 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 14:22:11,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-23 14:22:11,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-23 14:22:11,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-23 14:22:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2018-01-23 14:22:11,589 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 11 [2018-01-23 14:22:11,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:11,589 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2018-01-23 14:22:11,590 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-23 14:22:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2018-01-23 14:22:11,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-23 14:22:11,590 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:11,591 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] [2018-01-23 14:22:11,591 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-23 14:22:11,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1114650407, now seen corresponding path program 1 times [2018-01-23 14:22:11,591 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:11,591 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:11,592 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:11,592 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:22:11,592 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:11,608 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:11,660 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 14:22:11,661 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:22:11,661 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-23 14:22:11,663 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-23 14:22:11,663 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-23 14:22:11,663 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:22:11,664 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 5 states. [2018-01-23 14:22:11,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:11,739 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2018-01-23 14:22:11,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:22:11,740 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-01-23 14:22:11,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:11,741 INFO L225 Difference]: With dead ends: 71 [2018-01-23 14:22:11,741 INFO L226 Difference]: Without dead ends: 39 [2018-01-23 14:22:11,742 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 14:22:11,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-23 14:22:11,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-23 14:22:11,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-23 14:22:11,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2018-01-23 14:22:11,746 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 28 [2018-01-23 14:22:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:11,747 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2018-01-23 14:22:11,747 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-23 14:22:11,747 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2018-01-23 14:22:11,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-23 14:22:11,747 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:11,747 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] [2018-01-23 14:22:11,748 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-23 14:22:11,748 INFO L82 PathProgramCache]: Analyzing trace with hash -895795689, now seen corresponding path program 1 times [2018-01-23 14:22:11,748 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:11,748 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:11,749 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:11,749 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:22:11,749 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:11,774 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:11,868 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 14:22:11,868 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:22:11,868 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-23 14:22:11,869 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-23 14:22:11,869 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-23 14:22:11,869 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:22:11,869 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 5 states. [2018-01-23 14:22:11,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:11,960 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2018-01-23 14:22:11,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:22:11,961 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-01-23 14:22:11,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:11,965 INFO L225 Difference]: With dead ends: 73 [2018-01-23 14:22:11,965 INFO L226 Difference]: Without dead ends: 66 [2018-01-23 14:22:11,966 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-23 14:22:11,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-01-23 14:22:11,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 50. [2018-01-23 14:22:11,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-23 14:22:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2018-01-23 14:22:11,982 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 28 [2018-01-23 14:22:11,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:11,983 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2018-01-23 14:22:11,983 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-23 14:22:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2018-01-23 14:22:11,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-23 14:22:11,984 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:11,984 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] [2018-01-23 14:22:11,984 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-23 14:22:11,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1713444139, now seen corresponding path program 1 times [2018-01-23 14:22:11,985 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:11,985 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:11,986 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:11,986 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:22:11,986 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:12,011 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:12,234 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 14:22:12,234 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:22:12,234 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-23 14:22:12,235 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-23 14:22:12,235 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-23 14:22:12,235 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-23 14:22:12,235 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 6 states. [2018-01-23 14:22:12,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:12,371 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2018-01-23 14:22:12,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-23 14:22:12,372 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-01-23 14:22:12,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:12,373 INFO L225 Difference]: With dead ends: 50 [2018-01-23 14:22:12,373 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:22:12,374 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-23 14:22:12,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:22:12,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:22:12,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:22:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:22:12,375 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2018-01-23 14:22:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:12,375 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:22:12,375 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-23 14:22:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:22:12,375 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:22:12,378 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:22:12,379 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:22:12,379 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:22:12,379 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:22:12,379 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:22:12,379 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:22:12,379 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:22:12,379 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrncatErr0EnsuresViolation======== [2018-01-23 14:22:12,379 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:22:12,381 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2018-01-23 14:22:12,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-23 14:22:12,382 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:22:12,382 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 14:22:12,382 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrncatErr0EnsuresViolation]=== [2018-01-23 14:22:12,383 INFO L82 PathProgramCache]: Analyzing trace with hash -492923190, now seen corresponding path program 1 times [2018-01-23 14:22:12,383 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:22:12,383 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:22:12,384 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:12,384 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:22:12,384 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:22:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:22:12,393 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:22:12,436 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 14:22:12,436 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:22:12,436 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-23 14:22:12,437 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-23 14:22:12,437 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-23 14:22:12,437 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:22:12,437 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2018-01-23 14:22:12,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:22:12,496 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2018-01-23 14:22:12,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:22:12,497 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-01-23 14:22:12,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:22:12,498 INFO L225 Difference]: With dead ends: 84 [2018-01-23 14:22:12,498 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:22:12,499 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 14:22:12,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:22:12,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:22:12,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:22:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:22:12,500 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-01-23 14:22:12,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:22:12,500 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:22:12,500 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-23 14:22:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:22:12,500 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:22:12,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.01 02:22:12 BoogieIcfgContainer [2018-01-23 14:22:12,503 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-23 14:22:12,504 INFO L168 Benchmark]: Toolchain (without parser) took 2041.45 ms. Allocated memory was 304.6 MB in the beginning and 461.9 MB in the end (delta: 157.3 MB). Free memory was 261.9 MB in the beginning and 336.4 MB in the end (delta: -74.4 MB). Peak memory consumption was 82.9 MB. Max. memory is 5.3 GB. [2018-01-23 14:22:12,506 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 304.6 MB. Free memory is still 267.9 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 14:22:12,506 INFO L168 Benchmark]: CACSL2BoogieTranslator took 201.71 ms. Allocated memory is still 304.6 MB. Free memory was 261.9 MB in the beginning and 252.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:22:12,506 INFO L168 Benchmark]: Boogie Preprocessor took 30.47 ms. Allocated memory is still 304.6 MB. Free memory was 252.0 MB in the beginning and 250.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:22:12,507 INFO L168 Benchmark]: RCFGBuilder took 260.15 ms. Allocated memory is still 304.6 MB. Free memory was 250.0 MB in the beginning and 231.4 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 5.3 GB. [2018-01-23 14:22:12,507 INFO L168 Benchmark]: TraceAbstraction took 1541.56 ms. Allocated memory was 304.6 MB in the beginning and 461.9 MB in the end (delta: 157.3 MB). Free memory was 231.4 MB in the beginning and 336.4 MB in the end (delta: -104.9 MB). Peak memory consumption was 52.4 MB. Max. memory is 5.3 GB. [2018-01-23 14:22:12,509 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 304.6 MB. Free memory is still 267.9 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 201.71 ms. Allocated memory is still 304.6 MB. Free memory was 261.9 MB in the beginning and 252.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 30.47 ms. Allocated memory is still 304.6 MB. Free memory was 252.0 MB in the beginning and 250.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 260.15 ms. Allocated memory is still 304.6 MB. Free memory was 250.0 MB in the beginning and 231.4 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1541.56 ms. Allocated memory was 304.6 MB in the beginning and 461.9 MB in the end (delta: 157.3 MB). Free memory was 231.4 MB in the beginning and 336.4 MB in the end (delta: -104.9 MB). Peak memory consumption was 52.4 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, 45 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=45occurred 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: [L558] int length1 = __VERIFIER_nondet_int(); [L559] int length2 = __VERIFIER_nondet_int(); [L560] int n = __VERIFIER_nondet_int(); [L561] COND TRUE length1 < 1 [L562] length1 = 1 VAL [length1=1, length2=0, n=0] [L564] COND TRUE length2 < 1 [L565] length2 = 1 VAL [length1=1, length2=1, n=0] [L567] COND TRUE n < 1 [L568] n = 1 VAL [length1=1, length2=1, n=1] [L570] COND TRUE length1 < n || length1 - n < length2 [L570] return 0; - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 45 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=45occurred 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: 557]: 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, 45 locations, 4 error locations. SAFE Result, 1.0s OverallTime, 4 OverallIterations, 1 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 172 SDtfs, 71 SDslu, 261 SDs, 0 SdLazy, 175 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=3, 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, 16 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 95 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 9481 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, 45 locations, 4 error locations. SAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 50 SDtfs, 15 SDslu, 122 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=45occurred 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, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 600 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/openbsd_cstrncat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-23_14-22-12-519.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrncat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-23_14-22-12-519.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrncat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-23_14-22-12-519.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrncat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-23_14-22-12-519.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrncat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-23_14-22-12-519.csv Received shutdown request...