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_smtcomp.epf -i ../../../trunk/examples/svcomp/memsafety-ext2/length_test03_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 10:24:25,133 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 10:24:25,134 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 10:24:25,149 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 10:24:25,150 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 10:24:25,151 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 10:24:25,152 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 10:24:25,154 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 10:24:25,156 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 10:24:25,157 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 10:24:25,158 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 10:24:25,158 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 10:24:25,159 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 10:24:25,160 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 10:24:25,161 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 10:24:25,164 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 10:24:25,166 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 10:24:25,168 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 10:24:25,169 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 10:24:25,170 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 10:24:25,173 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 10:24:25,178 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 10:24:25,178 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 10:24:25,179 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_smtcomp.epf [2018-01-21 10:24:25,188 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 10:24:25,188 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 10:24:25,189 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 10:24:25,189 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 10:24:25,189 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 10:24:25,189 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 10:24:25,190 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 10:24:25,190 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 10:24:25,190 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 10:24:25,190 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 10:24:25,190 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 10:24:25,190 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 10:24:25,191 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 10:24:25,191 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 10:24:25,191 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 10:24:25,191 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 10:24:25,191 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 10:24:25,191 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 10:24:25,191 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 10:24:25,191 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 10:24:25,191 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 10:24:25,192 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 10:24:25,192 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 10:24:25,192 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 10:24:25,192 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 10:24:25,192 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 10:24:25,193 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 10:24:25,193 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 10:24:25,193 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 10:24:25,193 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 10:24:25,193 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 10:24:25,193 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 10:24:25,193 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 10:24:25,194 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 10:24:25,194 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 10:24:25,194 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 10:24:25,194 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 10:24:25,195 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 10:24:25,195 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 10:24:25,226 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 10:24:25,237 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 10:24:25,240 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 10:24:25,241 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 10:24:25,242 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 10:24:25,242 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety-ext2/length_test03_true-valid-memsafety.i [2018-01-21 10:24:25,427 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 10:24:25,430 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 10:24:25,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 10:24:25,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 10:24:25,436 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 10:24:25,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 10:24:25" (1/1) ... [2018-01-21 10:24:25,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41741684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:24:25, skipping insertion in model container [2018-01-21 10:24:25,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 10:24:25" (1/1) ... [2018-01-21 10:24:25,452 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 10:24:25,489 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 10:24:25,609 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 10:24:25,634 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 10:24:25,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:24:25 WrapperNode [2018-01-21 10:24:25,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 10:24:25,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 10:24:25,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 10:24:25,644 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 10:24:25,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:24:25" (1/1) ... [2018-01-21 10:24:25,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:24:25" (1/1) ... [2018-01-21 10:24:25,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:24:25" (1/1) ... [2018-01-21 10:24:25,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:24:25" (1/1) ... [2018-01-21 10:24:25,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:24:25" (1/1) ... [2018-01-21 10:24:25,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:24:25" (1/1) ... [2018-01-21 10:24:25,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:24:25" (1/1) ... [2018-01-21 10:24:25,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 10:24:25,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 10:24:25,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 10:24:25,685 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 10:24:25,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:24:25" (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 10:24:25,733 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 10:24:25,733 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 10:24:25,733 INFO L136 BoogieDeclarations]: Found implementation of procedure append [2018-01-21 10:24:25,733 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 10:24:25,734 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 10:24:25,734 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 10:24:25,734 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 10:24:25,734 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 10:24:25,734 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 10:24:25,734 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 10:24:25,735 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 10:24:25,735 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 10:24:25,735 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2018-01-21 10:24:25,735 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 10:24:25,735 INFO L128 BoogieDeclarations]: Found specification of procedure append [2018-01-21 10:24:25,735 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 10:24:25,735 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 10:24:25,736 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 10:24:26,060 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 10:24:26,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 10:24:26 BoogieIcfgContainer [2018-01-21 10:24:26,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 10:24:26,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 10:24:26,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 10:24:26,065 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 10:24:26,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 10:24:25" (1/3) ... [2018-01-21 10:24:26,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e936bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 10:24:26, skipping insertion in model container [2018-01-21 10:24:26,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:24:25" (2/3) ... [2018-01-21 10:24:26,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e936bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 10:24:26, skipping insertion in model container [2018-01-21 10:24:26,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 10:24:26" (3/3) ... [2018-01-21 10:24:26,068 INFO L105 eAbstractionObserver]: Analyzing ICFG length_test03_true-valid-memsafety.i [2018-01-21 10:24:26,074 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 10:24:26,081 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 10:24:26,118 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 10:24:26,118 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 10:24:26,118 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 10:24:26,118 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 10:24:26,118 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 10:24:26,118 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 10:24:26,119 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 10:24:26,119 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 10:24:26,120 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 10:24:26,136 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2018-01-21 10:24:26,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 10:24:26,142 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:24:26,143 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 10:24:26,143 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 10:24:26,146 INFO L82 PathProgramCache]: Analyzing trace with hash 159493, now seen corresponding path program 1 times [2018-01-21 10:24:26,148 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:24:26,190 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:24:26,190 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:24:26,190 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:24:26,190 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:24:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 10:24:26,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 10:24:26,241 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 10:24:26,247 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:24:26,254 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 10:24:26,254 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 10:24:26,254 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 10:24:26,254 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 10:24:26,254 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 10:24:26,255 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 10:24:26,255 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 10:24:26,255 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 10:24:26,255 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 10:24:26,258 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2018-01-21 10:24:26,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-21 10:24:26,262 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:24:26,262 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] [2018-01-21 10:24:26,262 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:24:26,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1690254578, now seen corresponding path program 1 times [2018-01-21 10:24:26,263 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:24:26,264 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:24:26,264 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:24:26,264 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:24:26,265 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:24:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:24:26,308 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:24:26,457 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 10:24:26,458 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:24:26,459 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 10:24:26,459 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:24:26,462 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 10:24:26,477 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 10:24:26,478 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 10:24:26,481 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 2 states. [2018-01-21 10:24:26,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:24:26,509 INFO L93 Difference]: Finished difference Result 141 states and 158 transitions. [2018-01-21 10:24:26,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 10:24:26,510 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2018-01-21 10:24:26,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:24:26,518 INFO L225 Difference]: With dead ends: 141 [2018-01-21 10:24:26,518 INFO L226 Difference]: Without dead ends: 76 [2018-01-21 10:24:26,521 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 10:24:26,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-01-21 10:24:26,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-01-21 10:24:26,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-21 10:24:26,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2018-01-21 10:24:26,555 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 34 [2018-01-21 10:24:26,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:24:26,555 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2018-01-21 10:24:26,555 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 10:24:26,555 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2018-01-21 10:24:26,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-01-21 10:24:26,558 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:24:26,558 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:24:26,558 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:24:26,559 INFO L82 PathProgramCache]: Analyzing trace with hash -767510167, now seen corresponding path program 1 times [2018-01-21 10:24:26,559 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:24:26,560 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:24:26,560 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:24:26,560 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:24:26,560 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:24:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:24:26,597 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:24:26,665 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 10:24:26,665 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:24:26,665 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 10:24:26,665 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:24:26,667 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 10:24:26,667 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 10:24:26,668 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 10:24:26,668 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 3 states. [2018-01-21 10:24:26,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:24:26,710 INFO L93 Difference]: Finished difference Result 139 states and 154 transitions. [2018-01-21 10:24:26,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 10:24:26,711 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2018-01-21 10:24:26,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:24:26,712 INFO L225 Difference]: With dead ends: 139 [2018-01-21 10:24:26,712 INFO L226 Difference]: Without dead ends: 77 [2018-01-21 10:24:26,714 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 10:24:26,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-01-21 10:24:26,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-01-21 10:24:26,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-21 10:24:26,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2018-01-21 10:24:26,723 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 54 [2018-01-21 10:24:26,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:24:26,723 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2018-01-21 10:24:26,724 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 10:24:26,724 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2018-01-21 10:24:26,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-21 10:24:26,726 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:24:26,726 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:24:26,726 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:24:26,726 INFO L82 PathProgramCache]: Analyzing trace with hash 667417900, now seen corresponding path program 1 times [2018-01-21 10:24:26,726 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:24:26,727 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:24:26,727 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:24:26,727 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:24:26,727 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:24:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:24:26,768 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:24:26,837 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 10:24:26,837 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:24:26,837 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 10:24:26,838 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:24:26,838 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 10:24:26,838 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 10:24:26,839 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 10:24:26,839 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand 3 states. [2018-01-21 10:24:26,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:24:26,861 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2018-01-21 10:24:26,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 10:24:26,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2018-01-21 10:24:26,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:24:26,863 INFO L225 Difference]: With dead ends: 117 [2018-01-21 10:24:26,864 INFO L226 Difference]: Without dead ends: 88 [2018-01-21 10:24:26,864 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 10:24:26,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-01-21 10:24:26,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2018-01-21 10:24:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-01-21 10:24:26,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2018-01-21 10:24:26,873 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 56 [2018-01-21 10:24:26,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:24:26,873 INFO L432 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2018-01-21 10:24:26,874 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 10:24:26,874 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2018-01-21 10:24:26,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-01-21 10:24:26,876 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:24:26,876 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:24:26,876 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:24:26,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1090926838, now seen corresponding path program 1 times [2018-01-21 10:24:26,876 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:24:26,877 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:24:26,877 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:24:26,877 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:24:26,878 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:24:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:24:26,915 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:24:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-21 10:24:26,988 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:24:26,988 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 10:24:26,989 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 84 with the following transitions: [2018-01-21 10:24:26,991 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [5], [6], [7], [8], [12], [15], [18], [24], [28], [31], [33], [36], [40], [41], [42], [43], [47], [51], [61], [62], [63], [64], [68], [71], [73], [74], [75], [76], [77], [79], [83], [84], [85], [86], [87], [89], [90], [95], [96], [97], [98], [99], [100], [101], [104], [105], [106], [112], [113], [114], [115], [116], [126], [128], [129], [130], [131], [132], [133], [134], [135] [2018-01-21 10:24:27,036 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 10:24:27,036 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown