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/forester-heap/sll-01_false-unreach-call_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 09:14:35,019 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 09:14:35,021 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 09:14:35,036 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 09:14:35,036 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 09:14:35,037 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 09:14:35,038 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 09:14:35,040 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 09:14:35,041 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 09:14:35,042 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 09:14:35,042 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 09:14:35,043 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 09:14:35,043 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 09:14:35,044 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 09:14:35,045 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 09:14:35,047 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 09:14:35,049 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 09:14:35,051 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 09:14:35,053 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 09:14:35,054 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 09:14:35,056 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 09:14:35,061 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 09:14:35,071 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 09:14:35,072 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 09:14:35,073 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 09:14:35,073 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 09:14:35,073 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 09:14:35,073 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 09:14:35,073 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 09:14:35,074 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 09:14:35,074 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 09:14:35,075 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 09:14:35,075 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 09:14:35,075 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 09:14:35,075 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 09:14:35,075 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 09:14:35,076 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 09:14:35,076 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 09:14:35,076 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 09:14:35,076 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 09:14:35,076 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 09:14:35,077 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 09:14:35,077 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 09:14:35,077 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 09:14:35,077 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 09:14:35,077 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 09:14:35,078 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 09:14:35,078 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 09:14:35,078 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 09:14:35,078 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 09:14:35,078 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 09:14:35,079 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 09:14:35,079 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 09:14:35,079 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 09:14:35,079 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 09:14:35,079 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 09:14:35,079 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 09:14:35,080 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 09:14:35,080 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 09:14:35,080 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 09:14:35,081 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 09:14:35,081 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 09:14:35,115 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 09:14:35,128 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 09:14:35,132 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 09:14:35,133 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 09:14:35,134 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 09:14:35,135 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-01_false-unreach-call_false-valid-deref.i [2018-01-21 09:14:35,322 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 09:14:35,326 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 09:14:35,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 09:14:35,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 09:14:35,331 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 09:14:35,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 09:14:35" (1/1) ... [2018-01-21 09:14:35,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@167329f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:14:35, skipping insertion in model container [2018-01-21 09:14:35,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 09:14:35" (1/1) ... [2018-01-21 09:14:35,348 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 09:14:35,389 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 09:14:35,517 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 09:14:35,547 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 09:14:35,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:14:35 WrapperNode [2018-01-21 09:14:35,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 09:14:35,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 09:14:35,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 09:14:35,559 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 09:14:35,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:14:35" (1/1) ... [2018-01-21 09:14:35,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:14:35" (1/1) ... [2018-01-21 09:14:35,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:14:35" (1/1) ... [2018-01-21 09:14:35,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:14:35" (1/1) ... [2018-01-21 09:14:35,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:14:35" (1/1) ... [2018-01-21 09:14:35,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:14:35" (1/1) ... [2018-01-21 09:14:35,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:14:35" (1/1) ... [2018-01-21 09:14:35,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 09:14:35,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 09:14:35,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 09:14:35,604 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 09:14:35,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:14:35" (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 09:14:35,686 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 09:14:35,686 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 09:14:35,686 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 09:14:35,686 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 09:14:35,686 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 09:14:35,686 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 09:14:35,686 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 09:14:35,687 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 09:14:35,687 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 09:14:35,687 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 09:14:35,687 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 09:14:35,687 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 09:14:35,687 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 09:14:35,687 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 09:14:35,687 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 09:14:36,121 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 09:14:36,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 09:14:36 BoogieIcfgContainer [2018-01-21 09:14:36,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 09:14:36,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 09:14:36,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 09:14:36,125 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 09:14:36,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 09:14:35" (1/3) ... [2018-01-21 09:14:36,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7096b10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 09:14:36, skipping insertion in model container [2018-01-21 09:14:36,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:14:35" (2/3) ... [2018-01-21 09:14:36,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7096b10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 09:14:36, skipping insertion in model container [2018-01-21 09:14:36,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 09:14:36" (3/3) ... [2018-01-21 09:14:36,129 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-01_false-unreach-call_false-valid-deref.i [2018-01-21 09:14:36,136 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 09:14:36,143 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 09:14:36,184 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 09:14:36,184 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 09:14:36,184 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 09:14:36,184 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 09:14:36,184 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 09:14:36,184 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 09:14:36,184 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 09:14:36,185 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 09:14:36,185 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 09:14:36,205 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states. [2018-01-21 09:14:36,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 09:14:36,211 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:14:36,212 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 09:14:36,213 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 09:14:36,217 INFO L82 PathProgramCache]: Analyzing trace with hash 400739, now seen corresponding path program 1 times [2018-01-21 09:14:36,219 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:14:36,261 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:14:36,261 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:14:36,261 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:14:36,261 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:14:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:14:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:14:36,311 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 09:14:36,317 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 09:14:36,324 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 09:14:36,325 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 09:14:36,325 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 09:14:36,325 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 09:14:36,325 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 09:14:36,325 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 09:14:36,326 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 09:14:36,326 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 09:14:36,326 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 09:14:36,330 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states. [2018-01-21 09:14:36,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-21 09:14:36,332 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:14:36,333 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] [2018-01-21 09:14:36,333 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:14:36,333 INFO L82 PathProgramCache]: Analyzing trace with hash -63616992, now seen corresponding path program 1 times [2018-01-21 09:14:36,333 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:14:36,334 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:14:36,335 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:14:36,335 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:14:36,335 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:14:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:14:36,356 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:14:36,393 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 09:14:36,395 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:14:36,395 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 09:14:36,395 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:14:36,398 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 09:14:36,500 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 09:14:36,501 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 09:14:36,503 INFO L87 Difference]: Start difference. First operand 126 states. Second operand 2 states. [2018-01-21 09:14:36,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:14:36,538 INFO L93 Difference]: Finished difference Result 243 states and 349 transitions. [2018-01-21 09:14:36,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 09:14:36,539 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2018-01-21 09:14:36,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:14:36,553 INFO L225 Difference]: With dead ends: 243 [2018-01-21 09:14:36,553 INFO L226 Difference]: Without dead ends: 123 [2018-01-21 09:14:36,556 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 09:14:36,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-01-21 09:14:36,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-01-21 09:14:36,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-01-21 09:14:36,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2018-01-21 09:14:36,596 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 23 [2018-01-21 09:14:36,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:14:36,597 INFO L432 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2018-01-21 09:14:36,597 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 09:14:36,597 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2018-01-21 09:14:36,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 09:14:36,599 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:14:36,599 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] [2018-01-21 09:14:36,599 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:14:36,600 INFO L82 PathProgramCache]: Analyzing trace with hash -980023246, now seen corresponding path program 1 times [2018-01-21 09:14:36,600 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:14:36,601 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:14:36,601 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:14:36,601 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:14:36,601 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:14:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:14:36,627 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:14:36,760 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 09:14:36,761 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:14:36,761 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 09:14:36,761 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:14:36,762 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 09:14:36,763 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 09:14:36,763 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 09:14:36,763 INFO L87 Difference]: Start difference. First operand 123 states and 133 transitions. Second operand 5 states. [2018-01-21 09:14:37,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:14:37,066 INFO L93 Difference]: Finished difference Result 289 states and 315 transitions. [2018-01-21 09:14:37,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 09:14:37,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2018-01-21 09:14:37,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:14:37,072 INFO L225 Difference]: With dead ends: 289 [2018-01-21 09:14:37,072 INFO L226 Difference]: Without dead ends: 194 [2018-01-21 09:14:37,074 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 09:14:37,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-01-21 09:14:37,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 127. [2018-01-21 09:14:37,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-01-21 09:14:37,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2018-01-21 09:14:37,086 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 36 [2018-01-21 09:14:37,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:14:37,087 INFO L432 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2018-01-21 09:14:37,087 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 09:14:37,087 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2018-01-21 09:14:37,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-21 09:14:37,089 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:14:37,089 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] [2018-01-21 09:14:37,089 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:14:37,089 INFO L82 PathProgramCache]: Analyzing trace with hash -465624459, now seen corresponding path program 1 times [2018-01-21 09:14:37,089 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:14:37,090 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:14:37,090 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:14:37,091 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:14:37,091 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:14:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:14:37,110 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:14:37,164 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 09:14:37,165 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:14:37,165 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 09:14:37,165 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:14:37,166 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 09:14:37,166 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 09:14:37,166 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 09:14:37,166 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand 5 states. [2018-01-21 09:14:37,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:14:37,278 INFO L93 Difference]: Finished difference Result 212 states and 230 transitions. [2018-01-21 09:14:37,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 09:14:37,279 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2018-01-21 09:14:37,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:14:37,281 INFO L225 Difference]: With dead ends: 212 [2018-01-21 09:14:37,281 INFO L226 Difference]: Without dead ends: 185 [2018-01-21 09:14:37,281 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 09:14:37,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-01-21 09:14:37,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 131. [2018-01-21 09:14:37,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-01-21 09:14:37,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2018-01-21 09:14:37,293 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 38 [2018-01-21 09:14:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:14:37,294 INFO L432 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2018-01-21 09:14:37,294 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 09:14:37,294 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2018-01-21 09:14:37,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-01-21 09:14:37,296 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:14:37,296 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, 1, 1, 1, 1, 1, 1] [2018-01-21 09:14:37,296 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:14:37,297 INFO L82 PathProgramCache]: Analyzing trace with hash 700231337, now seen corresponding path program 1 times [2018-01-21 09:14:37,297 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:14:37,298 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:14:37,298 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:14:37,298 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:14:37,298 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:14:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:14:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:14:37,357 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 09:14:37,368 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 09:14:37,379 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 09:14:37,379 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 09:14:37,397 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 09:14:37,397 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 09:14:37,397 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 09:14:37,397 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 09:14:37,397 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 09:14:37,397 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 09:14:37,397 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 09:14:37,398 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 09:14:37,398 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 09:14:37,399 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states. [2018-01-21 09:14:37,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 09:14:37,401 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:14:37,401 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 09:14:37,401 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 09:14:37,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1135260480, now seen corresponding path program 1 times [2018-01-21 09:14:37,401 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:14:37,402 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:14:37,402 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:14:37,402 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:14:37,403 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:14:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:14:37,408 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:14:37,417 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 09:14:37,417 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:14:37,417 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 09:14:37,417 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:14:37,418 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 09:14:37,418 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 09:14:37,418 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 09:14:37,418 INFO L87 Difference]: Start difference. First operand 126 states. Second operand 2 states. [2018-01-21 09:14:37,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:14:37,424 INFO L93 Difference]: Finished difference Result 243 states and 349 transitions. [2018-01-21 09:14:37,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 09:14:37,425 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-01-21 09:14:37,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:14:37,426 INFO L225 Difference]: With dead ends: 243 [2018-01-21 09:14:37,426 INFO L226 Difference]: Without dead ends: 121 [2018-01-21 09:14:37,427 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 09:14:37,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-01-21 09:14:37,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-01-21 09:14:37,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-01-21 09:14:37,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2018-01-21 09:14:37,435 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 21 [2018-01-21 09:14:37,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:14:37,435 INFO L432 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2018-01-21 09:14:37,435 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 09:14:37,435 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2018-01-21 09:14:37,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-21 09:14:37,436 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:14:37,437 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 09:14:37,437 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 09:14:37,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1152051538, now seen corresponding path program 1 times [2018-01-21 09:14:37,437 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:14:37,438 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:14:37,438 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:14:37,438 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:14:37,438 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:14:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:14:37,448 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:14:37,508 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 09:14:37,508 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:14:37,508 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 09:14:37,509 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:14:37,509 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 09:14:37,509 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 09:14:37,509 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 09:14:37,510 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand 5 states. [2018-01-21 09:14:37,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:14:37,655 INFO L93 Difference]: Finished difference Result 285 states and 310 transitions. [2018-01-21 09:14:37,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 09:14:37,656 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2018-01-21 09:14:37,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:14:37,658 INFO L225 Difference]: With dead ends: 285 [2018-01-21 09:14:37,658 INFO L226 Difference]: Without dead ends: 192 [2018-01-21 09:14:37,659 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 09:14:37,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-01-21 09:14:37,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 125. [2018-01-21 09:14:37,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-01-21 09:14:37,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2018-01-21 09:14:37,668 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 34 [2018-01-21 09:14:37,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:14:37,669 INFO L432 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2018-01-21 09:14:37,669 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 09:14:37,669 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2018-01-21 09:14:37,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 09:14:37,671 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:14:37,671 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] [2018-01-21 09:14:37,672 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 09:14:37,673 INFO L82 PathProgramCache]: Analyzing trace with hash -934561707, now seen corresponding path program 1 times [2018-01-21 09:14:37,673 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:14:37,674 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:14:37,674 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:14:37,674 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:14:37,675 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:14:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:14:37,686 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:14:37,731 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 09:14:37,731 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:14:37,731 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 09:14:37,731 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:14:37,732 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 09:14:37,732 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 09:14:37,732 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 09:14:37,733 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand 5 states. [2018-01-21 09:14:37,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:14:37,877 INFO L93 Difference]: Finished difference Result 208 states and 226 transitions. [2018-01-21 09:14:37,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 09:14:37,877 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2018-01-21 09:14:37,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:14:37,879 INFO L225 Difference]: With dead ends: 208 [2018-01-21 09:14:37,879 INFO L226 Difference]: Without dead ends: 183 [2018-01-21 09:14:37,879 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 09:14:37,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-01-21 09:14:37,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2018-01-21 09:14:37,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-01-21 09:14:37,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2018-01-21 09:14:37,889 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 36 [2018-01-21 09:14:37,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:14:37,890 INFO L432 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2018-01-21 09:14:37,890 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 09:14:37,890 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2018-01-21 09:14:37,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-21 09:14:37,892 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:14:37,892 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, 1, 1, 1, 1] [2018-01-21 09:14:37,892 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 09:14:37,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1469660791, now seen corresponding path program 1 times [2018-01-21 09:14:37,892 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:14:37,893 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:14:37,893 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:14:37,894 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:14:37,894 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:14:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:14:37,912 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:14:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 09:14:38,059 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 09:14:38,059 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 09:14:38,060 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 57 with the following transitions: [2018-01-21 09:14:38,061 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [8], [9], [13], [18], [22], [28], [31], [32], [46], [47], [48], [53], [54], [55], [61], [65], [71], [75], [77], [80], [169], [173], [178], [182], [190], [194], [196], [197], [198], [202], [206], [283], [288], [292], [298], [299], [305], [309], [311], [312], [313], [374], [376], [377], [378], [379], [383], [385], [386], [387], [388] [2018-01-21 09:14:38,115 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 09:14:38,115 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