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_cstrcat-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 08:17:41,083 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 08:17:41,085 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 08:17:41,100 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 08:17:41,101 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 08:17:41,102 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 08:17:41,103 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 08:17:41,105 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 08:17:41,107 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 08:17:41,107 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 08:17:41,108 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 08:17:41,109 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 08:17:41,110 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 08:17:41,111 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 08:17:41,112 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 08:17:41,114 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 08:17:41,117 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 08:17:41,119 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 08:17:41,120 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 08:17:41,121 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 08:17:41,124 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 08:17:41,129 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 08:17:41,130 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 08:17:41,130 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 08:17:41,138 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 08:17:41,139 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 08:17:41,139 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 08:17:41,140 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 08:17:41,140 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 08:17:41,140 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 08:17:41,140 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 08:17:41,140 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 08:17:41,140 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 08:17:41,141 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 08:17:41,141 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 08:17:41,141 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 08:17:41,141 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 08:17:41,141 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 08:17:41,142 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 08:17:41,142 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 08:17:41,142 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 08:17:41,142 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 08:17:41,142 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 08:17:41,142 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 08:17:41,142 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 08:17:41,142 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 08:17:41,143 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 08:17:41,143 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 08:17:41,143 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 08:17:41,143 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 08:17:41,144 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 08:17:41,144 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:17:41,144 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 08:17:41,144 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 08:17:41,144 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 08:17:41,144 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 08:17:41,144 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 08:17:41,144 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 08:17:41,144 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 08:17:41,145 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 08:17:41,145 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 08:17:41,145 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 08:17:41,146 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 08:17:41,146 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 08:17:41,178 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 08:17:41,189 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 08:17:41,192 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 08:17:41,193 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 08:17:41,193 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 08:17:41,194 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrcat-alloca_true-valid-memsafety_true-termination.i [2018-01-21 08:17:41,350 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 08:17:41,355 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 08:17:41,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 08:17:41,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 08:17:41,361 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 08:17:41,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:17:41" (1/1) ... [2018-01-21 08:17:41,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55297a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:41, skipping insertion in model container [2018-01-21 08:17:41,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:17:41" (1/1) ... [2018-01-21 08:17:41,380 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:17:41,416 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:17:41,541 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:17:41,563 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:17:41,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:41 WrapperNode [2018-01-21 08:17:41,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 08:17:41,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 08:17:41,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 08:17:41,573 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 08:17:41,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:41" (1/1) ... [2018-01-21 08:17:41,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:41" (1/1) ... [2018-01-21 08:17:41,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:41" (1/1) ... [2018-01-21 08:17:41,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:41" (1/1) ... [2018-01-21 08:17:41,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:41" (1/1) ... [2018-01-21 08:17:41,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:41" (1/1) ... [2018-01-21 08:17:41,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:41" (1/1) ... [2018-01-21 08:17:41,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 08:17:41,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 08:17:41,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 08:17:41,609 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 08:17:41,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:41" (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 08:17:41,659 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 08:17:41,659 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 08:17:41,659 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrcat [2018-01-21 08:17:41,659 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 08:17:41,660 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 08:17:41,660 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 08:17:41,660 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 08:17:41,660 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 08:17:41,660 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 08:17:41,660 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 08:17:41,660 INFO L128 BoogieDeclarations]: Found specification of procedure cstrcat [2018-01-21 08:17:41,660 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 08:17:41,660 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 08:17:41,661 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 08:17:41,874 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 08:17:41,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:17:41 BoogieIcfgContainer [2018-01-21 08:17:41,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 08:17:41,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 08:17:41,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 08:17:41,878 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 08:17:41,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 08:17:41" (1/3) ... [2018-01-21 08:17:41,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e0c3bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:17:41, skipping insertion in model container [2018-01-21 08:17:41,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:17:41" (2/3) ... [2018-01-21 08:17:41,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e0c3bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:17:41, skipping insertion in model container [2018-01-21 08:17:41,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:17:41" (3/3) ... [2018-01-21 08:17:41,882 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcat-alloca_true-valid-memsafety_true-termination.i [2018-01-21 08:17:41,890 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 08:17:41,896 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 08:17:41,944 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:17:41,944 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:17:41,944 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:17:41,944 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:17:41,944 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:17:41,944 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:17:41,945 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:17:41,945 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 08:17:41,946 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:17:41,966 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-21 08:17:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 08:17:41,973 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:17:41,975 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 08:17:41,975 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 08:17:41,980 INFO L82 PathProgramCache]: Analyzing trace with hash 104751, now seen corresponding path program 1 times [2018-01-21 08:17:41,983 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:17:42,026 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:42,026 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:17:42,027 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:42,027 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:17:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:17:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:17:42,079 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:17:42,084 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:17:42,090 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:17:42,090 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:17:42,090 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:17:42,090 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:17:42,090 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:17:42,090 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:17:42,090 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:17:42,090 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrcatErr0EnsuresViolation======== [2018-01-21 08:17:42,091 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:17:42,092 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-21 08:17:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-21 08:17:42,093 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:17:42,093 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] [2018-01-21 08:17:42,093 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrcatErr0EnsuresViolation]=== [2018-01-21 08:17:42,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1425144812, now seen corresponding path program 1 times [2018-01-21 08:17:42,094 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:17:42,094 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:42,095 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:17:42,095 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:42,095 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:17:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:17:42,132 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:17:42,185 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 08:17:42,186 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:17:42,187 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:17:42,187 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:17:42,189 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:17:42,200 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:17:42,201 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:17:42,204 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2018-01-21 08:17:42,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:17:42,305 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2018-01-21 08:17:42,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:17:42,307 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2018-01-21 08:17:42,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:17:42,315 INFO L225 Difference]: With dead ends: 62 [2018-01-21 08:17:42,316 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 08:17:42,319 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:17:42,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 08:17:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 08:17:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 08:17:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 08:17:42,346 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2018-01-21 08:17:42,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:17:42,346 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 08:17:42,346 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:17:42,346 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 08:17:42,346 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 08:17:42,348 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:17:42,348 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:17:42,348 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:17:42,348 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:17:42,349 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:17:42,349 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:17:42,349 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:17:42,349 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 08:17:42,349 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:17:42,350 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-21 08:17:42,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-21 08:17:42,351 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:17:42,351 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:17:42,351 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:17:42,351 INFO L82 PathProgramCache]: Analyzing trace with hash -303941379, now seen corresponding path program 1 times [2018-01-21 08:17:42,351 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:17:42,352 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:42,352 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:17:42,353 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:42,353 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:17:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:17:42,367 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:17:42,449 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 08:17:42,449 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:17:42,449 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 08:17:42,449 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:17:42,449 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 08:17:42,450 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 08:17:42,450 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 08:17:42,450 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 5 states. [2018-01-21 08:17:42,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:17:42,632 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2018-01-21 08:17:42,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 08:17:42,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-01-21 08:17:42,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:17:42,640 INFO L225 Difference]: With dead ends: 96 [2018-01-21 08:17:42,640 INFO L226 Difference]: Without dead ends: 71 [2018-01-21 08:17:42,641 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 08:17:42,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-01-21 08:17:42,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 42. [2018-01-21 08:17:42,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-21 08:17:42,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2018-01-21 08:17:42,658 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 13 [2018-01-21 08:17:42,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:17:42,658 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2018-01-21 08:17:42,658 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 08:17:42,658 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2018-01-21 08:17:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-21 08:17:42,659 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:17:42,659 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:17:42,659 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:17:42,659 INFO L82 PathProgramCache]: Analyzing trace with hash -302094337, now seen corresponding path program 1 times [2018-01-21 08:17:42,659 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:17:42,660 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:42,660 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:17:42,660 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:42,661 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:17:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:17:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:17:42,691 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:17:42,694 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:17:42,695 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:17:42,695 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:17:42,703 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:17:42,703 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:17:42,703 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:17:42,703 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:17:42,703 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:17:42,704 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:17:42,704 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:17:42,704 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 08:17:42,704 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:17:42,705 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-21 08:17:42,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-21 08:17:42,706 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:17:42,706 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:17:42,706 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 08:17:42,707 INFO L82 PathProgramCache]: Analyzing trace with hash -661768057, now seen corresponding path program 1 times [2018-01-21 08:17:42,707 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:17:42,708 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:42,708 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:17:42,708 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:42,708 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:17:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:17:42,718 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:17:42,755 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 08:17:42,756 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:17:42,756 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 08:17:42,756 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:17:42,756 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 08:17:42,756 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 08:17:42,756 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 08:17:42,757 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 5 states. [2018-01-21 08:17:42,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:17:42,870 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2018-01-21 08:17:42,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 08:17:42,871 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-01-21 08:17:42,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:17:42,872 INFO L225 Difference]: With dead ends: 96 [2018-01-21 08:17:42,872 INFO L226 Difference]: Without dead ends: 69 [2018-01-21 08:17:42,873 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 08:17:42,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-21 08:17:42,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 40. [2018-01-21 08:17:42,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-21 08:17:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2018-01-21 08:17:42,880 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 11 [2018-01-21 08:17:42,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:17:42,880 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2018-01-21 08:17:42,880 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 08:17:42,881 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2018-01-21 08:17:42,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-21 08:17:42,881 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:17:42,881 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:17:42,882 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 08:17:42,882 INFO L82 PathProgramCache]: Analyzing trace with hash -661766135, now seen corresponding path program 1 times [2018-01-21 08:17:42,882 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:17:42,883 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:42,883 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:17:42,883 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:42,883 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:17:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:17:42,892 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:17:42,914 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 08:17:42,914 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:17:42,914 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:17:42,914 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:17:42,914 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 08:17:42,915 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 08:17:42,915 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 08:17:42,915 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 3 states. [2018-01-21 08:17:42,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:17:42,960 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2018-01-21 08:17:42,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 08:17:42,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-01-21 08:17:42,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:17:42,961 INFO L225 Difference]: With dead ends: 42 [2018-01-21 08:17:42,961 INFO L226 Difference]: Without dead ends: 40 [2018-01-21 08:17:42,962 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 08:17:42,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-21 08:17:42,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2018-01-21 08:17:42,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-21 08:17:42,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2018-01-21 08:17:42,966 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 11 [2018-01-21 08:17:42,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:17:42,967 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2018-01-21 08:17:42,967 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 08:17:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2018-01-21 08:17:42,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-21 08:17:42,967 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:17:42,968 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:17:42,968 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 08:17:42,968 INFO L82 PathProgramCache]: Analyzing trace with hash -27267444, now seen corresponding path program 1 times [2018-01-21 08:17:42,968 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:17:42,969 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:42,969 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:17:42,969 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:42,969 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:17:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:17:42,997 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:17:43,345 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 08:17:43,346 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:17:43,346 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-21 08:17:43,346 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:17:43,347 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-21 08:17:43,347 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-21 08:17:43,347 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-01-21 08:17:43,348 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 9 states. [2018-01-21 08:17:43,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:17:43,541 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2018-01-21 08:17:43,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-21 08:17:43,541 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-01-21 08:17:43,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:17:43,542 INFO L225 Difference]: With dead ends: 37 [2018-01-21 08:17:43,542 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 08:17:43,542 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-01-21 08:17:43,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 08:17:43,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 08:17:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 08:17:43,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 08:17:43,543 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2018-01-21 08:17:43,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:17:43,543 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 08:17:43,543 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-21 08:17:43,543 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 08:17:43,543 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 08:17:43,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 08:17:43 BoogieIcfgContainer [2018-01-21 08:17:43,546 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 08:17:43,546 INFO L168 Benchmark]: Toolchain (without parser) took 2195.49 ms. Allocated memory was 307.8 MB in the beginning and 469.2 MB in the end (delta: 161.5 MB). Free memory was 265.1 MB in the beginning and 326.0 MB in the end (delta: -60.9 MB). Peak memory consumption was 100.6 MB. Max. memory is 5.3 GB. [2018-01-21 08:17:43,547 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 307.8 MB. Free memory is still 271.0 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 08:17:43,547 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.47 ms. Allocated memory is still 307.8 MB. Free memory was 265.1 MB in the beginning and 255.0 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-01-21 08:17:43,548 INFO L168 Benchmark]: Boogie Preprocessor took 36.17 ms. Allocated memory is still 307.8 MB. Free memory was 255.0 MB in the beginning and 253.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 08:17:43,548 INFO L168 Benchmark]: RCFGBuilder took 266.48 ms. Allocated memory is still 307.8 MB. Free memory was 253.0 MB in the beginning and 236.4 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 5.3 GB. [2018-01-21 08:17:43,548 INFO L168 Benchmark]: TraceAbstraction took 1669.75 ms. Allocated memory was 307.8 MB in the beginning and 469.2 MB in the end (delta: 161.5 MB). Free memory was 236.4 MB in the beginning and 326.0 MB in the end (delta: -89.5 MB). Peak memory consumption was 72.0 MB. Max. memory is 5.3 GB. [2018-01-21 08:17:43,550 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 307.8 MB. Free memory is still 271.0 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 216.47 ms. Allocated memory is still 307.8 MB. Free memory was 265.1 MB in the beginning and 255.0 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 36.17 ms. Allocated memory is still 307.8 MB. Free memory was 255.0 MB in the beginning and 253.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 266.48 ms. Allocated memory is still 307.8 MB. Free memory was 253.0 MB in the beginning and 236.4 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1669.75 ms. Allocated memory was 307.8 MB in the beginning and 469.2 MB in the end (delta: 161.5 MB). Free memory was 236.4 MB in the beginning and 326.0 MB in the end (delta: -89.5 MB). Peak memory consumption was 72.0 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, 43 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=43occurred 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 - 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: cstrcatErr0EnsuresViolation CFG has 4 procedures, 43 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 47 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred 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, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 441 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 - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L549] int length1 = __VERIFIER_nondet_int(); [L550] int length2 = __VERIFIER_nondet_int(); [L551] int length3 = __VERIFIER_nondet_int(); [L552] COND TRUE length1 < 1 [L553] length1 = 1 VAL [length1=1, length2=0, length3=3] [L555] COND TRUE length2 < 2 [L556] length2 = 2 VAL [length1=1, length2=2, length3=3] [L558] COND FALSE !(length3 < 1) VAL [length1=1, length2=2, length3=3] [L561] COND TRUE length2 - length3 < length1 || length3 > length2 [L561] return 0; - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 43 locations, 4 error locations. UNSAFE Result, 0.3s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 51 SDtfs, 64 SDslu, 114 SDs, 0 SdLazy, 36 SolverSat, 6 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=43occurred 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, 29 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 384 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 - PositiveResult [Line: 548]: 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, 43 locations, 4 error locations. SAFE Result, 0.8s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 116 SDtfs, 115 SDslu, 166 SDs, 0 SdLazy, 199 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred 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, 3 MinimizatonAttempts, 32 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 8034 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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_cstrcat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_08-17-43-557.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrcat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_08-17-43-557.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrcat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_08-17-43-557.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrcat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_08-17-43-557.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrcat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_08-17-43-557.csv Received shutdown request...