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.epf -i ../../../trunk/examples/svcomp/memsafety-ext/tree_dsw_true-valid-memsafety_false-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-20 23:36:27,074 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 23:36:27,076 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 23:36:27,090 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 23:36:27,091 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 23:36:27,092 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 23:36:27,093 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 23:36:27,094 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 23:36:27,096 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 23:36:27,097 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 23:36:27,098 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-20 23:36:27,098 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-20 23:36:27,099 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-20 23:36:27,100 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-20 23:36:27,101 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-20 23:36:27,104 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-20 23:36:27,106 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-20 23:36:27,108 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-20 23:36:27,109 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-20 23:36:27,110 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-20 23:36:27,112 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-20 23:36:27,117 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-20 23:36:27,118 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-20 23:36:27,118 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.epf [2018-01-20 23:36:27,127 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 23:36:27,127 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 23:36:27,128 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 23:36:27,128 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 23:36:27,128 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 23:36:27,128 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 23:36:27,128 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 23:36:27,128 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 23:36:27,129 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 23:36:27,129 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 23:36:27,129 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 23:36:27,129 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 23:36:27,129 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 23:36:27,129 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 23:36:27,129 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 23:36:27,130 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 23:36:27,130 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 23:36:27,130 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 23:36:27,130 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 23:36:27,130 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 23:36:27,130 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 23:36:27,130 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 23:36:27,131 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 23:36:27,131 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 23:36:27,131 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 23:36:27,131 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 23:36:27,131 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 23:36:27,131 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 23:36:27,132 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 23:36:27,132 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 23:36:27,132 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 23:36:27,132 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-20 23:36:27,132 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 23:36:27,132 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 23:36:27,132 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 23:36:27,132 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-20 23:36:27,133 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 23:36:27,133 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 23:36:27,167 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 23:36:27,178 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 23:36:27,181 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 23:36:27,182 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 23:36:27,182 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 23:36:27,183 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety-ext/tree_dsw_true-valid-memsafety_false-termination.i [2018-01-20 23:36:27,350 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 23:36:27,354 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 23:36:27,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 23:36:27,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 23:36:27,360 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 23:36:27,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:36:27" (1/1) ... [2018-01-20 23:36:27,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43302af8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:36:27, skipping insertion in model container [2018-01-20 23:36:27,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:36:27" (1/1) ... [2018-01-20 23:36:27,376 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:36:27,413 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:36:27,535 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:36:27,561 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:36:27,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:36:27 WrapperNode [2018-01-20 23:36:27,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 23:36:27,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 23:36:27,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 23:36:27,572 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 23:36:27,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:36:27" (1/1) ... [2018-01-20 23:36:27,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:36:27" (1/1) ... [2018-01-20 23:36:27,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:36:27" (1/1) ... [2018-01-20 23:36:27,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:36:27" (1/1) ... [2018-01-20 23:36:27,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:36:27" (1/1) ... [2018-01-20 23:36:27,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:36:27" (1/1) ... [2018-01-20 23:36:27,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:36:27" (1/1) ... [2018-01-20 23:36:27,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 23:36:27,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 23:36:27,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 23:36:27,614 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 23:36:27,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:36:27" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 23:36:27,667 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 23:36:27,667 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 23:36:27,667 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 23:36:27,667 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-20 23:36:27,668 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-20 23:36:27,668 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 23:36:27,668 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 23:36:27,668 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 23:36:27,668 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-20 23:36:27,668 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-20 23:36:27,668 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-20 23:36:27,669 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 23:36:27,669 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 23:36:27,669 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 23:36:28,072 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 23:36:28,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:36:28 BoogieIcfgContainer [2018-01-20 23:36:28,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 23:36:28,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 23:36:28,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 23:36:28,077 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 23:36:28,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 11:36:27" (1/3) ... [2018-01-20 23:36:28,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f9513a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:36:28, skipping insertion in model container [2018-01-20 23:36:28,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:36:27" (2/3) ... [2018-01-20 23:36:28,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f9513a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:36:28, skipping insertion in model container [2018-01-20 23:36:28,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:36:28" (3/3) ... [2018-01-20 23:36:28,081 INFO L105 eAbstractionObserver]: Analyzing ICFG tree_dsw_true-valid-memsafety_false-termination.i [2018-01-20 23:36:28,090 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 23:36:28,098 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-20 23:36:28,148 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:36:28,148 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:36:28,149 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:36:28,149 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:36:28,149 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:36:28,149 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:36:28,149 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:36:28,149 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-20 23:36:28,150 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:36:28,172 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states. [2018-01-20 23:36:28,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-20 23:36:28,179 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:36:28,180 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-20 23:36:28,180 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-20 23:36:28,185 INFO L82 PathProgramCache]: Analyzing trace with hash 214305, now seen corresponding path program 1 times [2018-01-20 23:36:28,188 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:36:28,227 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:36:28,227 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:36:28,227 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:36:28,227 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:36:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:36:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:36:28,274 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 23:36:28,280 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:36:28,288 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:36:28,288 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:36:28,288 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:36:28,288 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:36:28,288 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:36:28,288 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:36:28,289 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:36:28,289 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-20 23:36:28,289 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:36:28,292 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states. [2018-01-20 23:36:28,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-20 23:36:28,295 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:36:28,295 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] [2018-01-20 23:36:28,295 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:36:28,296 INFO L82 PathProgramCache]: Analyzing trace with hash 210929596, now seen corresponding path program 1 times [2018-01-20 23:36:28,296 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:36:28,297 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:36:28,297 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:36:28,297 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:36:28,297 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:36:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:36:28,321 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:36:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:36:28,359 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:36:28,360 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:36:28,360 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:36:28,363 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:36:28,456 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:36:28,456 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:36:28,458 INFO L87 Difference]: Start difference. First operand 101 states. Second operand 2 states. [2018-01-20 23:36:28,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:36:28,486 INFO L93 Difference]: Finished difference Result 192 states and 226 transitions. [2018-01-20 23:36:28,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:36:28,487 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2018-01-20 23:36:28,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:36:28,499 INFO L225 Difference]: With dead ends: 192 [2018-01-20 23:36:28,499 INFO L226 Difference]: Without dead ends: 98 [2018-01-20 23:36:28,502 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 [2018-01-20 23:36:28,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-01-20 23:36:28,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-01-20 23:36:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-01-20 23:36:28,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2018-01-20 23:36:28,538 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 26 [2018-01-20 23:36:28,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:36:28,538 INFO L432 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2018-01-20 23:36:28,538 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:36:28,538 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2018-01-20 23:36:28,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-20 23:36:28,540 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:36:28,540 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] [2018-01-20 23:36:28,540 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:36:28,541 INFO L82 PathProgramCache]: Analyzing trace with hash -615979456, now seen corresponding path program 1 times [2018-01-20 23:36:28,541 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:36:28,542 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:36:28,542 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:36:28,542 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:36:28,542 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:36:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:36:28,570 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:36:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:36:28,643 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:36:28,643 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-20 23:36:28,643 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:36:28,645 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-20 23:36:28,645 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-20 23:36:28,646 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-20 23:36:28,646 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand 4 states. [2018-01-20 23:36:28,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:36:28,695 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2018-01-20 23:36:28,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-20 23:36:28,695 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2018-01-20 23:36:28,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:36:28,697 INFO L225 Difference]: With dead ends: 109 [2018-01-20 23:36:28,697 INFO L226 Difference]: Without dead ends: 102 [2018-01-20 23:36:28,698 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-20 23:36:28,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-01-20 23:36:28,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2018-01-20 23:36:28,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-01-20 23:36:28,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2018-01-20 23:36:28,706 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 30 [2018-01-20 23:36:28,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:36:28,706 INFO L432 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2018-01-20 23:36:28,707 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-20 23:36:28,707 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2018-01-20 23:36:28,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-20 23:36:28,709 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:36:28,709 INFO L322 BasicCegarLoop]: trace histogram [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] [2018-01-20 23:36:28,709 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:36:28,709 INFO L82 PathProgramCache]: Analyzing trace with hash -298055667, now seen corresponding path program 1 times [2018-01-20 23:36:28,709 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:36:28,710 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:36:28,711 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:36:28,711 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:36:28,711 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:36:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:36:28,730 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:36:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-20 23:36:28,801 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:36:28,801 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-20 23:36:28,802 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:36:28,802 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-20 23:36:28,802 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-20 23:36:28,802 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-20 23:36:28,803 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand 6 states. [2018-01-20 23:36:28,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:36:28,985 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2018-01-20 23:36:28,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-20 23:36:28,985 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2018-01-20 23:36:28,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:36:28,986 INFO L225 Difference]: With dead ends: 154 [2018-01-20 23:36:28,986 INFO L226 Difference]: Without dead ends: 114 [2018-01-20 23:36:28,987 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-01-20 23:36:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-01-20 23:36:28,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 102. [2018-01-20 23:36:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-01-20 23:36:28,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2018-01-20 23:36:28,993 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 42 [2018-01-20 23:36:28,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:36:28,994 INFO L432 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2018-01-20 23:36:28,994 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-20 23:36:28,994 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2018-01-20 23:36:28,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-20 23:36:28,995 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:36:28,995 INFO L322 BasicCegarLoop]: trace histogram [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] [2018-01-20 23:36:28,995 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:36:28,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1908754361, now seen corresponding path program 1 times [2018-01-20 23:36:28,995 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:36:28,996 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:36:28,996 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:36:28,996 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:36:28,996 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:36:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:36:29,013 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:36:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-20 23:36:29,091 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:36:29,091 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:36:29,092 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 53 with the following transitions: [2018-01-20 23:36:29,095 INFO L201 CegarAbsIntRunner]: [0], [1], [6], [7], [8], [9], [10], [14], [16], [19], [102], [103], [107], [111], [113], [114], [115], [116], [117], [118], [119], [120], [123], [135], [137], [138], [139], [140], [141], [145], [149], [151], [152], [153], [154], [155], [156], [157], [168], [170], [181], [183], [187], [188], [189], [190], [192], [193], [194], [195] [2018-01-20 23:36:29,153 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-20 23:36:29,153 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