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_Taipan+AI_EQ_preciseopt.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrncat-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 08:17:53,687 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 08:17:53,689 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 08:17:53,705 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 08:17:53,705 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 08:17:53,706 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 08:17:53,708 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 08:17:53,710 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 08:17:53,712 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 08:17:53,713 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 08:17:53,714 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 08:17:53,714 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 08:17:53,715 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 08:17:53,716 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 08:17:53,717 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 08:17:53,720 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 08:17:53,722 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 08:17:53,724 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 08:17:53,726 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 08:17:53,727 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 08:17:53,729 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 08:17:53,734 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 08:17:53,735 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 08:17:53,735 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf [2018-01-21 08:17:53,746 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 08:17:53,746 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 08:17:53,747 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 08:17:53,747 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 08:17:53,747 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 08:17:53,748 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 08:17:53,748 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 08:17:53,748 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 08:17:53,748 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 08:17:53,749 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 08:17:53,749 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 08:17:53,749 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 08:17:53,750 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 08:17:53,750 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 08:17:53,750 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 08:17:53,750 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 08:17:53,750 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 08:17:53,751 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 08:17:53,751 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 08:17:53,751 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 08:17:53,751 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 08:17:53,752 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 08:17:53,752 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 08:17:53,752 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 08:17:53,752 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 08:17:53,752 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 08:17:53,753 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 08:17:53,753 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:17:53,753 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 08:17:53,753 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 08:17:53,753 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 08:17:53,754 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 08:17:53,754 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 08:17:53,754 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 08:17:53,754 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 08:17:53,754 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 08:17:53,755 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 08:17:53,755 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 08:17:53,756 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 08:17:53,756 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 08:17:53,790 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 08:17:53,803 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 08:17:53,806 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 08:17:53,807 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 08:17:53,807 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 08:17:53,808 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrncat-alloca_true-valid-memsafety_true-termination.i [2018-01-21 08:17:53,955 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 08:17:53,961 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 08:17:53,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 08:17:53,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 08:17:53,967 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 08:17:53,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:17:53" (1/1) ... [2018-01-21 08:17:53,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@374dc2c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:53, skipping insertion in model container [2018-01-21 08:17:53,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:17:53" (1/1) ... [2018-01-21 08:17:53,989 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:17:54,031 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:17:54,154 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:17:54,175 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:17:54,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:54 WrapperNode [2018-01-21 08:17:54,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 08:17:54,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 08:17:54,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 08:17:54,185 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 08:17:54,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:54" (1/1) ... [2018-01-21 08:17:54,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:54" (1/1) ... [2018-01-21 08:17:54,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:54" (1/1) ... [2018-01-21 08:17:54,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:54" (1/1) ... [2018-01-21 08:17:54,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:54" (1/1) ... [2018-01-21 08:17:54,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:54" (1/1) ... [2018-01-21 08:17:54,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:54" (1/1) ... [2018-01-21 08:17:54,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 08:17:54,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 08:17:54,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 08:17:54,222 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 08:17:54,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:54" (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 [2018-01-21 08:17:54,273 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 08:17:54,273 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 08:17:54,273 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrncat [2018-01-21 08:17:54,273 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 08:17:54,274 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 08:17:54,274 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 08:17:54,274 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 08:17:54,274 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 08:17:54,274 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 08:17:54,274 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 08:17:54,275 INFO L128 BoogieDeclarations]: Found specification of procedure cstrncat [2018-01-21 08:17:54,275 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 08:17:54,275 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 08:17:54,275 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 08:17:54,484 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 08:17:54,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:17:54 BoogieIcfgContainer [2018-01-21 08:17:54,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 08:17:54,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 08:17:54,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 08:17:54,487 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 08:17:54,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 08:17:53" (1/3) ... [2018-01-21 08:17:54,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b88acd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:17:54, skipping insertion in model container [2018-01-21 08:17:54,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:54" (2/3) ... [2018-01-21 08:17:54,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b88acd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:17:54, skipping insertion in model container [2018-01-21 08:17:54,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:17:54" (3/3) ... [2018-01-21 08:17:54,492 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncat-alloca_true-valid-memsafety_true-termination.i [2018-01-21 08:17:54,498 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 08:17:54,504 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 08:17:54,550 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:17:54,550 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:17:54,551 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:17:54,551 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:17:54,551 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:17:54,551 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:17:54,551 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:17:54,551 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 08:17:54,552 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:17:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2018-01-21 08:17:54,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 08:17:54,579 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:17:54,580 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 08:17:54,580 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 08:17:54,586 INFO L82 PathProgramCache]: Analyzing trace with hash 115322, now seen corresponding path program 1 times [2018-01-21 08:17:54,589 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:17:54,646 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:54,646 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:17:54,647 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:54,647 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:17:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:17:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:17:54,702 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:17:54,708 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:17:54,714 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:17:54,714 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:17:54,715 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:17:54,715 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:17:54,715 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:17:54,715 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:17:54,715 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:17:54,715 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 08:17:54,715 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:17:54,717 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2018-01-21 08:17:54,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-21 08:17:54,718 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:17:54,719 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:17:54,719 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:17:54,719 INFO L82 PathProgramCache]: Analyzing trace with hash -47417765, now seen corresponding path program 1 times [2018-01-21 08:17:54,719 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:17:54,720 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:54,720 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:17:54,720 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:54,721 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:17:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:17:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:17:54,771 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:17:54,774 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:17:54,775 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:17:54,776 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:17:54,783 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:17:54,784 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:17:54,784 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:17:54,784 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:17:54,784 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:17:54,784 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:17:54,784 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:17:54,784 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 08:17:54,785 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:17:54,787 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2018-01-21 08:17:54,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-21 08:17:54,788 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:17:54,788 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:17:54,788 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 08:17:54,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1090550926, now seen corresponding path program 1 times [2018-01-21 08:17:54,788 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:17:54,789 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:54,790 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:17:54,790 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:54,790 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:17:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:17:54,811 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:17:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:17:54,885 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:17:54,885 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:17:54,885 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:17:54,887 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 08:17:54,964 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 08:17:54,964 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 08:17:54,966 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2018-01-21 08:17:55,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:17:55,052 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2018-01-21 08:17:55,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 08:17:55,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-01-21 08:17:55,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:17:55,066 INFO L225 Difference]: With dead ends: 67 [2018-01-21 08:17:55,066 INFO L226 Difference]: Without dead ends: 39 [2018-01-21 08:17:55,069 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 [2018-01-21 08:17:55,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-21 08:17:55,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-21 08:17:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-21 08:17:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2018-01-21 08:17:55,111 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 11 [2018-01-21 08:17:55,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:17:55,112 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2018-01-21 08:17:55,112 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 08:17:55,112 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2018-01-21 08:17:55,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 08:17:55,113 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:17:55,113 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] [2018-01-21 08:17:55,114 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 08:17:55,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1114650407, now seen corresponding path program 1 times [2018-01-21 08:17:55,114 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:17:55,115 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:55,115 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:17:55,116 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:55,116 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:17:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:17:55,131 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:17:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:17:55,195 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:17:55,195 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 08:17:55,196 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:17:55,198 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 08:17:55,198 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 08:17:55,199 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 08:17:55,199 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 5 states. [2018-01-21 08:17:55,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:17:55,289 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2018-01-21 08:17:55,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 08:17:55,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-01-21 08:17:55,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:17:55,291 INFO L225 Difference]: With dead ends: 71 [2018-01-21 08:17:55,291 INFO L226 Difference]: Without dead ends: 39 [2018-01-21 08:17:55,293 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 [2018-01-21 08:17:55,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-21 08:17:55,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-21 08:17:55,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-21 08:17:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2018-01-21 08:17:55,299 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 28 [2018-01-21 08:17:55,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:17:55,300 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2018-01-21 08:17:55,300 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 08:17:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2018-01-21 08:17:55,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 08:17:55,301 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:17:55,301 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] [2018-01-21 08:17:55,301 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 08:17:55,302 INFO L82 PathProgramCache]: Analyzing trace with hash -895795689, now seen corresponding path program 1 times [2018-01-21 08:17:55,302 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:17:55,303 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:55,303 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:17:55,303 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:55,303 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:17:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:17:55,327 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:17:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:17:55,431 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:17:55,432 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 08:17:55,432 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:17:55,432 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 08:17:55,432 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 08:17:55,432 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 08:17:55,433 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 5 states. [2018-01-21 08:17:55,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:17:55,515 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2018-01-21 08:17:55,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 08:17:55,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-01-21 08:17:55,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:17:55,518 INFO L225 Difference]: With dead ends: 73 [2018-01-21 08:17:55,519 INFO L226 Difference]: Without dead ends: 66 [2018-01-21 08:17:55,519 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 [2018-01-21 08:17:55,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-01-21 08:17:55,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 50. [2018-01-21 08:17:55,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-21 08:17:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2018-01-21 08:17:55,530 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 28 [2018-01-21 08:17:55,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:17:55,530 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2018-01-21 08:17:55,530 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 08:17:55,530 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2018-01-21 08:17:55,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 08:17:55,531 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:17:55,531 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] [2018-01-21 08:17:55,531 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 08:17:55,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1713444139, now seen corresponding path program 1 times [2018-01-21 08:17:55,532 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:17:55,533 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:55,533 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:17:55,533 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:55,533 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:17:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:17:55,557 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:17:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:17:55,736 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:17:55,736 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 08:17:55,736 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:17:55,737 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 08:17:55,737 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 08:17:55,737 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-21 08:17:55,737 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 6 states. [2018-01-21 08:17:55,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:17:55,886 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2018-01-21 08:17:55,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 08:17:55,886 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-01-21 08:17:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:17:55,887 INFO L225 Difference]: With dead ends: 50 [2018-01-21 08:17:55,887 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 08:17:55,888 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 [2018-01-21 08:17:55,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 08:17:55,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 08:17:55,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 08:17:55,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 08:17:55,889 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2018-01-21 08:17:55,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:17:55,889 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 08:17:55,889 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 08:17:55,889 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 08:17:55,889 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 08:17:55,892 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:17:55,892 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:17:55,892 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:17:55,893 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:17:55,893 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:17:55,893 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:17:55,893 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:17:55,893 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrncatErr0EnsuresViolation======== [2018-01-21 08:17:55,893 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:17:55,895 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2018-01-21 08:17:55,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 08:17:55,896 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:17:55,896 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] [2018-01-21 08:17:55,896 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrncatErr0EnsuresViolation]=== [2018-01-21 08:17:55,897 INFO L82 PathProgramCache]: Analyzing trace with hash -492923190, now seen corresponding path program 1 times [2018-01-21 08:17:55,897 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:17:55,898 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:55,898 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:17:55,898 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:55,899 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:17:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:17:55,907 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:17:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:17:55,941 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:17:55,941 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 08:17:55,941 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:17:55,941 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 08:17:55,942 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 08:17:55,942 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 08:17:55,942 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2018-01-21 08:17:55,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:17:55,995 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2018-01-21 08:17:55,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 08:17:55,996 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-01-21 08:17:55,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:17:55,996 INFO L225 Difference]: With dead ends: 84 [2018-01-21 08:17:55,997 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 08:17:55,997 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 [2018-01-21 08:17:55,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 08:17:55,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 08:17:55,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 08:17:55,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 08:17:55,999 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-01-21 08:17:55,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:17:55,999 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 08:17:55,999 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 08:17:55,999 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 08:17:55,999 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 08:17:56,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 08:17:56 BoogieIcfgContainer [2018-01-21 08:17:56,002 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 08:17:56,003 INFO L168 Benchmark]: Toolchain (without parser) took 2047.72 ms. Allocated memory was 305.7 MB in the beginning and 464.5 MB in the end (delta: 158.9 MB). Free memory was 264.0 MB in the beginning and 340.5 MB in the end (delta: -76.5 MB). Peak memory consumption was 82.4 MB. Max. memory is 5.3 GB. [2018-01-21 08:17:56,005 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 305.7 MB. Free memory is still 270.0 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 08:17:56,005 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.79 ms. Allocated memory is still 305.7 MB. Free memory was 263.0 MB in the beginning and 252.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-01-21 08:17:56,006 INFO L168 Benchmark]: Boogie Preprocessor took 36.81 ms. Allocated memory is still 305.7 MB. Free memory was 252.9 MB in the beginning and 250.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 08:17:56,006 INFO L168 Benchmark]: RCFGBuilder took 263.00 ms. Allocated memory is still 305.7 MB. Free memory was 250.9 MB in the beginning and 233.3 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 5.3 GB. [2018-01-21 08:17:56,006 INFO L168 Benchmark]: TraceAbstraction took 1517.37 ms. Allocated memory was 305.7 MB in the beginning and 464.5 MB in the end (delta: 158.9 MB). Free memory was 233.3 MB in the beginning and 340.5 MB in the end (delta: -107.2 MB). Peak memory consumption was 51.6 MB. Max. memory is 5.3 GB. [2018-01-21 08:17:56,008 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 305.7 MB. Free memory is still 270.0 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 222.79 ms. Allocated memory is still 305.7 MB. Free memory was 263.0 MB in the beginning and 252.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 36.81 ms. Allocated memory is still 305.7 MB. Free memory was 252.9 MB in the beginning and 250.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 263.00 ms. Allocated memory is still 305.7 MB. Free memory was 250.9 MB in the beginning and 233.3 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1517.37 ms. Allocated memory was 305.7 MB in the beginning and 464.5 MB in the end (delta: 158.9 MB). Free memory was 233.3 MB in the beginning and 340.5 MB in the end (delta: -107.2 MB). Peak memory consumption was 51.6 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, 1.1s OverallTime, 4 OverallIterations, 1 TraceHistogramMax, 0.5s 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, 0.4s 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_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_08-17-56-017.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_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_08-17-56-017.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_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_08-17-56-017.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_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_08-17-56-017.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_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_08-17-56-017.csv Received shutdown request...