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_precise.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 05:36:01,017 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 05:36:01,020 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 05:36:01,037 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 05:36:01,038 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 05:36:01,039 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 05:36:01,040 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 05:36:01,042 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 05:36:01,044 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 05:36:01,047 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 05:36:01,048 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 05:36:01,048 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 05:36:01,049 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 05:36:01,050 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 05:36:01,051 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 05:36:01,054 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 05:36:01,056 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 05:36:01,058 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 05:36:01,059 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 05:36:01,061 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 05:36:01,063 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 05:36:01,070 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_precise.epf [2018-01-21 05:36:01,080 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 05:36:01,080 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 05:36:01,081 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 05:36:01,081 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 05:36:01,082 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 05:36:01,082 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 05:36:01,082 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 05:36:01,082 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 05:36:01,083 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 05:36:01,083 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 05:36:01,083 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 05:36:01,083 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 05:36:01,084 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 05:36:01,084 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 05:36:01,084 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 05:36:01,084 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 05:36:01,084 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 05:36:01,085 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 05:36:01,085 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 05:36:01,086 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 05:36:01,087 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 05:36:01,087 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 05:36:01,087 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 05:36:01,087 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 05:36:01,088 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 05:36:01,088 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 05:36:01,088 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 05:36:01,088 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 05:36:01,088 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 05:36:01,088 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 05:36:01,089 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 05:36:01,089 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 05:36:01,089 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 05:36:01,089 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 05:36:01,089 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 05:36:01,090 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 05:36:01,090 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 05:36:01,092 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 05:36:01,093 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 05:36:01,132 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 05:36:01,145 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 05:36:01,149 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 05:36:01,151 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 05:36:01,151 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 05:36:01,152 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrncat-alloca_true-valid-memsafety_true-termination.i [2018-01-21 05:36:01,356 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 05:36:01,361 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 05:36:01,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 05:36:01,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 05:36:01,367 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 05:36:01,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:36:01" (1/1) ... [2018-01-21 05:36:01,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4227c817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:36:01, skipping insertion in model container [2018-01-21 05:36:01,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:36:01" (1/1) ... [2018-01-21 05:36:01,386 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:36:01,425 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:36:01,536 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:36:01,554 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:36:01,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:36:01 WrapperNode [2018-01-21 05:36:01,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 05:36:01,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 05:36:01,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 05:36:01,563 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 05:36:01,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:36:01" (1/1) ... [2018-01-21 05:36:01,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:36:01" (1/1) ... [2018-01-21 05:36:01,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:36:01" (1/1) ... [2018-01-21 05:36:01,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:36:01" (1/1) ... [2018-01-21 05:36:01,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:36:01" (1/1) ... [2018-01-21 05:36:01,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:36:01" (1/1) ... [2018-01-21 05:36:01,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:36:01" (1/1) ... [2018-01-21 05:36:01,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 05:36:01,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 05:36:01,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 05:36:01,596 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 05:36:01,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:36:01" (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 05:36:01,651 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 05:36:01,651 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 05:36:01,651 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrncat [2018-01-21 05:36:01,651 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 05:36:01,651 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 05:36:01,652 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 05:36:01,652 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 05:36:01,652 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 05:36:01,652 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 05:36:01,652 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 05:36:01,652 INFO L128 BoogieDeclarations]: Found specification of procedure cstrncat [2018-01-21 05:36:01,653 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 05:36:01,653 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 05:36:01,653 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 05:36:01,877 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 05:36:01,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:36:01 BoogieIcfgContainer [2018-01-21 05:36:01,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 05:36:01,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 05:36:01,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 05:36:01,881 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 05:36:01,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 05:36:01" (1/3) ... [2018-01-21 05:36:01,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2285073b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:36:01, skipping insertion in model container [2018-01-21 05:36:01,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:36:01" (2/3) ... [2018-01-21 05:36:01,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2285073b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:36:01, skipping insertion in model container [2018-01-21 05:36:01,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:36:01" (3/3) ... [2018-01-21 05:36:01,886 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncat-alloca_true-valid-memsafety_true-termination.i [2018-01-21 05:36:01,894 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 05:36:01,900 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 05:36:01,936 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:36:01,936 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:36:01,936 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:36:01,937 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:36:01,937 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:36:01,937 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:36:01,937 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:36:01,937 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 05:36:01,938 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:36:01,954 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2018-01-21 05:36:01,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 05:36:01,959 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:36:01,960 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 05:36:01,960 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 05:36:01,963 INFO L82 PathProgramCache]: Analyzing trace with hash 115322, now seen corresponding path program 1 times [2018-01-21 05:36:01,965 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:36:02,016 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:36:02,017 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:36:02,017 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:36:02,017 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:36:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:36:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:36:02,075 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:36:02,082 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:36:02,088 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:36:02,088 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:36:02,088 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:36:02,088 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:36:02,088 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:36:02,088 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:36:02,088 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:36:02,088 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 05:36:02,088 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:36:02,090 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2018-01-21 05:36:02,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-21 05:36:02,091 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:36:02,091 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:36:02,091 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:36:02,091 INFO L82 PathProgramCache]: Analyzing trace with hash -47417765, now seen corresponding path program 1 times [2018-01-21 05:36:02,091 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:36:02,092 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:36:02,092 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:36:02,093 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:36:02,093 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:36:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:36:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:36:02,144 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:36:02,147 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:36:02,148 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:36:02,148 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:36:02,155 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:36:02,155 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:36:02,156 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:36:02,156 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:36:02,156 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:36:02,156 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:36:02,156 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:36:02,157 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 05:36:02,157 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:36:02,159 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2018-01-21 05:36:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-21 05:36:02,161 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:36:02,161 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:36:02,161 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 05:36:02,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1090550926, now seen corresponding path program 1 times [2018-01-21 05:36:02,161 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:36:02,162 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:36:02,163 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:36:02,163 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:36:02,163 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:36:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:36:02,186 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:36:02,359 WARN L143 SmtUtils]: Spent 109ms on a formula simplification that was a NOOP. DAG size: 3 [2018-01-21 05:36:02,362 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 05:36:02,364 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:36:02,364 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:36:02,364 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:36:02,367 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 05:36:02,381 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 05:36:02,382 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 05:36:02,384 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2018-01-21 05:36:02,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:36:02,466 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2018-01-21 05:36:02,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 05:36:02,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-01-21 05:36:02,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:36:02,476 INFO L225 Difference]: With dead ends: 67 [2018-01-21 05:36:02,476 INFO L226 Difference]: Without dead ends: 39 [2018-01-21 05:36:02,478 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 [2018-01-21 05:36:02,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-21 05:36:02,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-21 05:36:02,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-21 05:36:02,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2018-01-21 05:36:02,516 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 11 [2018-01-21 05:36:02,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:36:02,516 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2018-01-21 05:36:02,516 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 05:36:02,517 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2018-01-21 05:36:02,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 05:36:02,517 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:36:02,518 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 05:36:02,518 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 05:36:02,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1114650407, now seen corresponding path program 1 times [2018-01-21 05:36:02,518 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:36:02,519 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:36:02,519 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:36:02,519 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:36:02,519 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:36:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:36:02,534 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:36:02,620 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 05:36:02,679 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:36:02,680 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 05:36:02,680 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:36:02,681 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 05:36:02,681 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 05:36:02,681 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 05:36:02,682 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 5 states. [2018-01-21 05:36:02,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:36:02,819 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2018-01-21 05:36:02,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 05:36:02,819 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-01-21 05:36:02,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:36:02,820 INFO L225 Difference]: With dead ends: 71 [2018-01-21 05:36:02,820 INFO L226 Difference]: Without dead ends: 39 [2018-01-21 05:36:02,821 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 05:36:02,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-21 05:36:02,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-21 05:36:02,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-21 05:36:02,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2018-01-21 05:36:02,826 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 28 [2018-01-21 05:36:02,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:36:02,827 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2018-01-21 05:36:02,827 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 05:36:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2018-01-21 05:36:02,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 05:36:02,828 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:36:02,828 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 05:36:02,829 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 05:36:02,829 INFO L82 PathProgramCache]: Analyzing trace with hash -895795689, now seen corresponding path program 1 times [2018-01-21 05:36:02,829 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:36:02,830 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:36:02,830 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:36:02,830 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:36:02,831 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:36:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:36:02,852 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:36:02,949 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 05:36:02,949 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:36:02,949 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 05:36:02,949 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:36:02,950 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 05:36:02,950 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 05:36:02,950 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 05:36:02,950 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 5 states. [2018-01-21 05:36:03,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:36:03,038 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2018-01-21 05:36:03,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 05:36:03,038 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-01-21 05:36:03,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:36:03,042 INFO L225 Difference]: With dead ends: 73 [2018-01-21 05:36:03,042 INFO L226 Difference]: Without dead ends: 66 [2018-01-21 05:36:03,043 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 05:36:03,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-01-21 05:36:03,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 50. [2018-01-21 05:36:03,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-21 05:36:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2018-01-21 05:36:03,058 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 28 [2018-01-21 05:36:03,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:36:03,058 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2018-01-21 05:36:03,058 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 05:36:03,058 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2018-01-21 05:36:03,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 05:36:03,059 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:36:03,059 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 05:36:03,059 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 05:36:03,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1713444139, now seen corresponding path program 1 times [2018-01-21 05:36:03,060 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:36:03,061 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:36:03,061 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:36:03,061 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:36:03,061 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:36:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:36:03,086 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:36:03,254 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 05:36:03,254 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:36:03,254 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 05:36:03,254 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:36:03,255 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 05:36:03,255 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 05:36:03,255 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-21 05:36:03,256 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 6 states. [2018-01-21 05:36:03,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:36:03,407 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2018-01-21 05:36:03,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 05:36:03,408 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-01-21 05:36:03,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:36:03,408 INFO L225 Difference]: With dead ends: 50 [2018-01-21 05:36:03,408 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 05:36:03,409 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 05:36:03,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 05:36:03,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 05:36:03,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 05:36:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 05:36:03,410 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2018-01-21 05:36:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:36:03,411 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 05:36:03,411 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 05:36:03,411 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 05:36:03,411 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 05:36:03,414 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:36:03,414 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:36:03,414 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:36:03,414 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:36:03,414 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:36:03,415 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:36:03,415 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:36:03,415 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrncatErr0EnsuresViolation======== [2018-01-21 05:36:03,415 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:36:03,416 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2018-01-21 05:36:03,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 05:36:03,417 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:36:03,418 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 05:36:03,418 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrncatErr0EnsuresViolation]=== [2018-01-21 05:36:03,418 INFO L82 PathProgramCache]: Analyzing trace with hash -492923190, now seen corresponding path program 1 times [2018-01-21 05:36:03,418 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:36:03,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:36:03,419 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:36:03,420 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:36:03,420 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:36:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:36:03,428 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:36:03,474 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 05:36:03,475 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:36:03,475 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 05:36:03,475 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:36:03,476 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 05:36:03,476 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 05:36:03,476 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 05:36:03,476 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2018-01-21 05:36:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:36:03,537 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2018-01-21 05:36:03,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 05:36:03,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-01-21 05:36:03,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:36:03,538 INFO L225 Difference]: With dead ends: 84 [2018-01-21 05:36:03,538 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 05:36:03,539 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 05:36:03,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 05:36:03,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 05:36:03,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 05:36:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 05:36:03,540 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-01-21 05:36:03,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:36:03,540 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 05:36:03,540 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 05:36:03,540 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 05:36:03,540 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 05:36:03,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 05:36:03 BoogieIcfgContainer [2018-01-21 05:36:03,543 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 05:36:03,544 INFO L168 Benchmark]: Toolchain (without parser) took 2187.58 ms. Allocated memory was 302.0 MB in the beginning and 459.8 MB in the end (delta: 157.8 MB). Free memory was 261.9 MB in the beginning and 332.9 MB in the end (delta: -71.0 MB). Peak memory consumption was 86.8 MB. Max. memory is 5.3 GB. [2018-01-21 05:36:03,546 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 302.0 MB. Free memory is still 267.9 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 05:36:03,546 INFO L168 Benchmark]: CACSL2BoogieTranslator took 200.56 ms. Allocated memory is still 302.0 MB. Free memory was 260.9 MB in the beginning and 250.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-01-21 05:36:03,546 INFO L168 Benchmark]: Boogie Preprocessor took 32.67 ms. Allocated memory is still 302.0 MB. Free memory was 250.9 MB in the beginning and 248.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 05:36:03,547 INFO L168 Benchmark]: RCFGBuilder took 282.03 ms. Allocated memory is still 302.0 MB. Free memory was 248.8 MB in the beginning and 230.8 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 5.3 GB. [2018-01-21 05:36:03,547 INFO L168 Benchmark]: TraceAbstraction took 1665.07 ms. Allocated memory was 302.0 MB in the beginning and 459.8 MB in the end (delta: 157.8 MB). Free memory was 230.8 MB in the beginning and 332.9 MB in the end (delta: -102.1 MB). Peak memory consumption was 55.7 MB. Max. memory is 5.3 GB. [2018-01-21 05:36:03,549 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 302.0 MB. Free memory is still 267.9 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 200.56 ms. Allocated memory is still 302.0 MB. Free memory was 260.9 MB in the beginning and 250.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 32.67 ms. Allocated memory is still 302.0 MB. Free memory was 250.9 MB in the beginning and 248.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 282.03 ms. Allocated memory is still 302.0 MB. Free memory was 248.8 MB in the beginning and 230.8 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1665.07 ms. Allocated memory was 302.0 MB in the beginning and 459.8 MB in the end (delta: 157.8 MB). Free memory was 230.8 MB in the beginning and 332.9 MB in the end (delta: -102.1 MB). Peak memory consumption was 55.7 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, 1.2s OverallTime, 4 OverallIterations, 1 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 172 SDtfs, 71 SDslu, 261 SDs, 0 SdLazy, 175 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 16 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 95 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 9481 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 540]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: cstrncatErr0EnsuresViolation CFG has 4 procedures, 45 locations, 4 error locations. SAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 50 SDtfs, 15 SDslu, 122 SDs, 0 SdLazy, 31 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 600 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrncat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_05-36-03-558.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_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_05-36-03-558.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_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_05-36-03-558.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_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_05-36-03-558.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_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_05-36-03-558.csv Received shutdown request...