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 0.1.23-2f49842 [2018-01-20 21:55:19,827 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 21:55:19,828 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 21:55:19,843 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 21:55:19,844 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 21:55:19,845 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 21:55:19,846 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 21:55:19,847 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 21:55:19,849 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 21:55:19,850 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 21:55:19,851 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-20 21:55:19,851 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-20 21:55:19,852 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-20 21:55:19,853 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-20 21:55:19,854 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-20 21:55:19,857 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-20 21:55:19,859 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-20 21:55:19,861 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-20 21:55:19,862 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-20 21:55:19,864 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-20 21:55:19,866 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-20 21:55:19,866 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-20 21:55:19,866 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-20 21:55:19,867 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-20 21:55:19,868 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-20 21:55:19,870 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-20 21:55:19,870 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-20 21:55:19,870 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-20 21:55:19,871 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-20 21:55:19,871 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-20 21:55:19,871 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-20 21:55:19,872 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 [2018-01-20 21:55:19,880 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 21:55:19,881 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 21:55:19,881 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 21:55:19,881 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 21:55:19,881 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 21:55:19,882 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 21:55:19,882 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 21:55:19,882 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 21:55:19,882 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 21:55:19,882 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 21:55:19,882 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 21:55:19,882 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 21:55:19,883 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 21:55:19,883 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 21:55:19,883 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 21:55:19,883 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 21:55:19,883 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 21:55:19,883 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 21:55:19,883 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 21:55:19,883 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 21:55:19,884 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 21:55:19,884 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 21:55:19,884 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 21:55:19,884 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 21:55:19,884 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 21:55:19,885 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 21:55:19,885 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 21:55:19,885 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 21:55:19,885 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 21:55:19,885 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 21:55:19,885 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 21:55:19,885 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-20 21:55:19,886 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 21:55:19,886 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 21:55:19,886 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 21:55:19,886 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 21:55:19,887 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 21:55:19,921 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 21:55:19,933 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 21:55:19,936 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 21:55:19,937 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 21:55:19,937 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 21:55:19,938 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrncat-alloca_true-valid-memsafety_true-termination.i [2018-01-20 21:55:20,105 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 21:55:20,110 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 21:55:20,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 21:55:20,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 21:55:20,116 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 21:55:20,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 09:55:20" (1/1) ... [2018-01-20 21:55:20,120 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 20.01 09:55:20, skipping insertion in model container [2018-01-20 21:55:20,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 09:55:20" (1/1) ... [2018-01-20 21:55:20,134 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 21:55:20,171 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 21:55:20,292 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 21:55:20,316 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 21:55:20,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:55:20 WrapperNode [2018-01-20 21:55:20,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 21:55:20,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 21:55:20,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 21:55:20,325 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 21:55:20,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:55:20" (1/1) ... [2018-01-20 21:55:20,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:55:20" (1/1) ... [2018-01-20 21:55:20,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:55:20" (1/1) ... [2018-01-20 21:55:20,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:55:20" (1/1) ... [2018-01-20 21:55:20,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:55:20" (1/1) ... [2018-01-20 21:55:20,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:55:20" (1/1) ... [2018-01-20 21:55:20,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:55:20" (1/1) ... [2018-01-20 21:55:20,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 21:55:20,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 21:55:20,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 21:55:20,363 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 21:55:20,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:55:20" (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 [2018-01-20 21:55:20,418 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 21:55:20,418 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 21:55:20,418 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrncat [2018-01-20 21:55:20,418 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 21:55:20,418 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-20 21:55:20,419 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-20 21:55:20,419 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 21:55:20,419 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 21:55:20,419 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 21:55:20,419 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-20 21:55:20,419 INFO L128 BoogieDeclarations]: Found specification of procedure cstrncat [2018-01-20 21:55:20,420 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 21:55:20,420 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 21:55:20,420 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 21:55:20,652 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 21:55:20,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 09:55:20 BoogieIcfgContainer [2018-01-20 21:55:20,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 21:55:20,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 21:55:20,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 21:55:20,656 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 21:55:20,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 09:55:20" (1/3) ... [2018-01-20 21:55:20,657 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 20.01 09:55:20, skipping insertion in model container [2018-01-20 21:55:20,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:55:20" (2/3) ... [2018-01-20 21:55:20,657 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 20.01 09:55:20, skipping insertion in model container [2018-01-20 21:55:20,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 09:55:20" (3/3) ... [2018-01-20 21:55:20,659 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrncat-alloca_true-valid-memsafety_true-termination.i [2018-01-20 21:55:20,665 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 21:55:20,671 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-20 21:55:20,714 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 21:55:20,715 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 21:55:20,715 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 21:55:20,715 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 21:55:20,715 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 21:55:20,715 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 21:55:20,715 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 21:55:20,715 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-20 21:55:20,716 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 21:55:20,736 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-20 21:55:20,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-20 21:55:20,742 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 21:55:20,742 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-20 21:55:20,742 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-20 21:55:20,746 INFO L82 PathProgramCache]: Analyzing trace with hash 118205, now seen corresponding path program 1 times [2018-01-20 21:55:20,748 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 21:55:20,748 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 21:55:20,789 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:55:20,790 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 21:55:20,790 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:55:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 21:55:20,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 21:55:20,847 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 21:55:20,852 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 21:55:20,858 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 21:55:20,858 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 21:55:20,858 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 21:55:20,858 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 21:55:20,859 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 21:55:20,859 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 21:55:20,859 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 21:55:20,859 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-20 21:55:20,859 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 21:55:20,860 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-20 21:55:20,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-20 21:55:20,861 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 21:55:20,861 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 21:55:20,861 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 21:55:20,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1650403995, now seen corresponding path program 1 times [2018-01-20 21:55:20,861 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 21:55:20,862 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 21:55:20,862 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:55:20,862 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 21:55:20,863 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:55:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 21:55:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 21:55:20,905 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 21:55:20,907 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 21:55:20,908 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 21:55:20,908 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 21:55:20,914 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 21:55:20,915 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 21:55:20,915 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 21:55:20,915 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 21:55:20,915 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 21:55:20,915 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 21:55:20,915 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 21:55:20,915 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-20 21:55:20,915 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 21:55:20,918 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-20 21:55:20,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-20 21:55:20,919 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 21:55:20,919 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 21:55:20,919 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-20 21:55:20,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1409537045, now seen corresponding path program 1 times [2018-01-20 21:55:20,919 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 21:55:20,920 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 21:55:20,921 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:55:20,921 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 21:55:20,921 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:55:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 21:55:20,941 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 21:55:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 21:55:21,085 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 21:55:21,085 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 21:55:21,086 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-20 21:55:21,095 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-20 21:55:21,096 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-20 21:55:21,098 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2018-01-20 21:55:21,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 21:55:21,176 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-20 21:55:21,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-20 21:55:21,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-01-20 21:55:21,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 21:55:21,185 INFO L225 Difference]: With dead ends: 72 [2018-01-20 21:55:21,185 INFO L226 Difference]: Without dead ends: 41 [2018-01-20 21:55:21,188 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-20 21:55:21,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-20 21:55:21,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-20 21:55:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-20 21:55:21,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2018-01-20 21:55:21,222 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 11 [2018-01-20 21:55:21,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 21:55:21,223 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2018-01-20 21:55:21,223 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-20 21:55:21,223 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2018-01-20 21:55:21,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-20 21:55:21,225 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 21:55:21,225 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] [2018-01-20 21:55:21,225 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-20 21:55:21,225 INFO L82 PathProgramCache]: Analyzing trace with hash 2049811947, now seen corresponding path program 1 times [2018-01-20 21:55:21,225 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 21:55:21,226 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 21:55:21,227 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:55:21,227 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 21:55:21,227 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:55:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 21:55:21,243 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 21:55:21,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 21:55:21,320 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 21:55:21,320 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-20 21:55:21,322 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-20 21:55:21,322 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-20 21:55:21,322 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-20 21:55:21,323 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 5 states. [2018-01-20 21:55:21,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 21:55:21,460 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2018-01-20 21:55:21,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-20 21:55:21,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2018-01-20 21:55:21,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 21:55:21,462 INFO L225 Difference]: With dead ends: 75 [2018-01-20 21:55:21,462 INFO L226 Difference]: Without dead ends: 41 [2018-01-20 21:55:21,463 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 [2018-01-20 21:55:21,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-20 21:55:21,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-20 21:55:21,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-20 21:55:21,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2018-01-20 21:55:21,469 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 36 [2018-01-20 21:55:21,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 21:55:21,470 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2018-01-20 21:55:21,470 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-20 21:55:21,470 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2018-01-20 21:55:21,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-20 21:55:21,471 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 21:55:21,471 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] [2018-01-20 21:55:21,471 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-20 21:55:21,472 INFO L82 PathProgramCache]: Analyzing trace with hash 2072444201, now seen corresponding path program 1 times [2018-01-20 21:55:21,472 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 21:55:21,472 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 21:55:21,473 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:55:21,473 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 21:55:21,473 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:55:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 21:55:21,500 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 21:55:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 21:55:21,593 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 21:55:21,593 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-20 21:55:21,593 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-20 21:55:21,594 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-20 21:55:21,594 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-20 21:55:21,594 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 6 states. [2018-01-20 21:55:21,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 21:55:21,653 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2018-01-20 21:55:21,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-20 21:55:21,653 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2018-01-20 21:55:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 21:55:21,656 INFO L225 Difference]: With dead ends: 81 [2018-01-20 21:55:21,657 INFO L226 Difference]: Without dead ends: 54 [2018-01-20 21:55:21,657 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 [2018-01-20 21:55:21,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-20 21:55:21,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2018-01-20 21:55:21,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-20 21:55:21,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-01-20 21:55:21,662 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 36 [2018-01-20 21:55:21,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 21:55:21,663 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-01-20 21:55:21,663 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-20 21:55:21,663 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-01-20 21:55:21,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-20 21:55:21,664 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 21:55:21,664 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] [2018-01-20 21:55:21,664 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-20 21:55:21,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1987871450, now seen corresponding path program 1 times [2018-01-20 21:55:21,664 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 21:55:21,664 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 21:55:21,665 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:55:21,665 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 21:55:21,665 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:55:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 21:55:21,692 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 21:55:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 21:55:21,937 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 21:55:21,937 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-20 21:55:21,938 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-20 21:55:21,938 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-20 21:55:21,938 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-01-20 21:55:21,938 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 7 states. [2018-01-20 21:55:22,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 21:55:22,119 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2018-01-20 21:55:22,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-20 21:55:22,119 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2018-01-20 21:55:22,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 21:55:22,120 INFO L225 Difference]: With dead ends: 44 [2018-01-20 21:55:22,120 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 21:55:22,120 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 [2018-01-20 21:55:22,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 21:55:22,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 21:55:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 21:55:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 21:55:22,121 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2018-01-20 21:55:22,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 21:55:22,121 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 21:55:22,121 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-20 21:55:22,121 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 21:55:22,121 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 21:55:22,124 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 21:55:22,124 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 21:55:22,124 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 21:55:22,124 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 21:55:22,124 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 21:55:22,124 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 21:55:22,124 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 21:55:22,124 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrncatErr0EnsuresViolation======== [2018-01-20 21:55:22,124 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 21:55:22,125 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-20 21:55:22,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-20 21:55:22,126 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 21:55:22,126 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] [2018-01-20 21:55:22,126 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrncatErr0EnsuresViolation]=== [2018-01-20 21:55:22,126 INFO L82 PathProgramCache]: Analyzing trace with hash -821118556, now seen corresponding path program 1 times [2018-01-20 21:55:22,126 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 21:55:22,127 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 21:55:22,128 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:55:22,128 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 21:55:22,128 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:55:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 21:55:22,136 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 21:55:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 21:55:22,172 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 21:55:22,172 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-20 21:55:22,172 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-20 21:55:22,172 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-20 21:55:22,172 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-20 21:55:22,173 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 5 states. [2018-01-20 21:55:22,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 21:55:22,261 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2018-01-20 21:55:22,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-20 21:55:22,262 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2018-01-20 21:55:22,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 21:55:22,262 INFO L225 Difference]: With dead ends: 88 [2018-01-20 21:55:22,262 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 21:55:22,263 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 [2018-01-20 21:55:22,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 21:55:22,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 21:55:22,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 21:55:22,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 21:55:22,263 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2018-01-20 21:55:22,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 21:55:22,264 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 21:55:22,264 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-20 21:55:22,264 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 21:55:22,264 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 21:55:22,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 09:55:22 BoogieIcfgContainer [2018-01-20 21:55:22,267 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-20 21:55:22,269 INFO L168 Benchmark]: Toolchain (without parser) took 2162.67 ms. Allocated memory was 298.3 MB in the beginning and 447.7 MB in the end (delta: 149.4 MB). Free memory was 258.2 MB in the beginning and 306.6 MB in the end (delta: -48.4 MB). Peak memory consumption was 101.0 MB. Max. memory is 5.3 GB. [2018-01-20 21:55:22,270 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 298.3 MB. Free memory is still 264.2 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-20 21:55:22,271 INFO L168 Benchmark]: CACSL2BoogieTranslator took 214.07 ms. Allocated memory is still 298.3 MB. Free memory was 257.2 MB in the beginning and 247.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-01-20 21:55:22,271 INFO L168 Benchmark]: Boogie Preprocessor took 37.79 ms. Allocated memory is still 298.3 MB. Free memory was 247.1 MB in the beginning and 245.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-20 21:55:22,271 INFO L168 Benchmark]: RCFGBuilder took 289.56 ms. Allocated memory is still 298.3 MB. Free memory was 245.1 MB in the beginning and 227.1 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 5.3 GB. [2018-01-20 21:55:22,272 INFO L168 Benchmark]: TraceAbstraction took 1614.34 ms. Allocated memory was 298.3 MB in the beginning and 447.7 MB in the end (delta: 149.4 MB). Free memory was 227.1 MB in the beginning and 306.6 MB in the end (delta: -79.6 MB). Peak memory consumption was 69.9 MB. Max. memory is 5.3 GB. [2018-01-20 21:55:22,273 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 298.3 MB. Free memory is still 264.2 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 214.07 ms. Allocated memory is still 298.3 MB. Free memory was 257.2 MB in the beginning and 247.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 37.79 ms. Allocated memory is still 298.3 MB. Free memory was 247.1 MB in the beginning and 245.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 289.56 ms. Allocated memory is still 298.3 MB. Free memory was 245.1 MB in the beginning and 227.1 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1614.34 ms. Allocated memory was 298.3 MB in the beginning and 447.7 MB in the end (delta: 149.4 MB). Free memory was 227.1 MB in the beginning and 306.6 MB in the end (delta: -79.6 MB). Peak memory consumption was 69.9 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, 1.2s 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, 0.3s 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-0-2018-01-20_21-55-22-283.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-0-2018-01-20_21-55-22-283.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-1-2018-01-20_21-55-22-283.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-2-2018-01-20_21-55-22-283.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-3-2018-01-20_21-55-22-283.csv Received shutdown request...