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_mostprecise.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-optional_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 03:45:54,387 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 03:45:54,389 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 03:45:54,409 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 03:45:54,410 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 03:45:54,411 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 03:45:54,412 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 03:45:54,414 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 03:45:54,417 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 03:45:54,418 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 03:45:54,419 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 03:45:54,419 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 03:45:54,420 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 03:45:54,422 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 03:45:54,423 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 03:45:54,426 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 03:45:54,429 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 03:45:54,431 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 03:45:54,433 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 03:45:54,434 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 03:45:54,437 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 03:45:54,443 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 03:45:54,444 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 03:45:54,444 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_mostprecise.epf [2018-01-21 03:45:54,478 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 03:45:54,478 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 03:45:54,479 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 03:45:54,479 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 03:45:54,479 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 03:45:54,479 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 03:45:54,480 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 03:45:54,480 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 03:45:54,482 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 03:45:54,483 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 03:45:54,483 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 03:45:54,484 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 03:45:54,484 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 03:45:54,484 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 03:45:54,484 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 03:45:54,484 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 03:45:54,484 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 03:45:54,485 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 03:45:54,485 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 03:45:54,485 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 03:45:54,485 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 03:45:54,485 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 03:45:54,486 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 03:45:54,486 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 03:45:54,486 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 03:45:54,488 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 03:45:54,488 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 03:45:54,488 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 03:45:54,488 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 03:45:54,488 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 03:45:54,489 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 03:45:54,489 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 03:45:54,489 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 03:45:54,489 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 03:45:54,489 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 03:45:54,490 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 03:45:54,490 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 03:45:54,490 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 03:45:54,491 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 03:45:54,492 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 03:45:54,546 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 03:45:54,602 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 03:45:54,605 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 03:45:54,607 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 03:45:54,607 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 03:45:54,607 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-optional_true-unreach-call_true-valid-memsafety.i [2018-01-21 03:45:54,800 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 03:45:54,808 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 03:45:54,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 03:45:54,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 03:45:54,814 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 03:45:54,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:45:54" (1/1) ... [2018-01-21 03:45:54,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27f8129e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:45:54, skipping insertion in model container [2018-01-21 03:45:54,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:45:54" (1/1) ... [2018-01-21 03:45:54,838 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:45:54,880 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:45:54,996 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:45:55,019 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:45:55,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:45:55 WrapperNode [2018-01-21 03:45:55,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 03:45:55,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 03:45:55,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 03:45:55,031 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 03:45:55,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:45:55" (1/1) ... [2018-01-21 03:45:55,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:45:55" (1/1) ... [2018-01-21 03:45:55,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:45:55" (1/1) ... [2018-01-21 03:45:55,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:45:55" (1/1) ... [2018-01-21 03:45:55,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:45:55" (1/1) ... [2018-01-21 03:45:55,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:45:55" (1/1) ... [2018-01-21 03:45:55,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:45:55" (1/1) ... [2018-01-21 03:45:55,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 03:45:55,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 03:45:55,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 03:45:55,154 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 03:45:55,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:45:55" (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 03:45:55,332 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 03:45:55,332 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 03:45:55,332 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 03:45:55,332 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 03:45:55,333 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 03:45:55,333 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 03:45:55,333 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 03:45:55,333 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 03:45:55,333 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 03:45:55,333 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 03:45:55,334 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 03:45:55,334 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 03:45:55,334 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 03:45:55,334 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 03:45:55,334 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 03:45:55,334 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 03:45:55,335 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 03:45:55,740 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 03:45:55,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:45:55 BoogieIcfgContainer [2018-01-21 03:45:55,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 03:45:55,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 03:45:55,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 03:45:55,744 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 03:45:55,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 03:45:54" (1/3) ... [2018-01-21 03:45:55,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aeb5de1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:45:55, skipping insertion in model container [2018-01-21 03:45:55,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:45:55" (2/3) ... [2018-01-21 03:45:55,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aeb5de1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:45:55, skipping insertion in model container [2018-01-21 03:45:55,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:45:55" (3/3) ... [2018-01-21 03:45:55,747 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-optional_true-unreach-call_true-valid-memsafety.i [2018-01-21 03:45:55,754 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 03:45:55,762 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 03:45:55,808 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:45:55,808 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:45:55,808 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:45:55,808 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:45:55,808 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:45:55,809 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:45:55,809 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:45:55,809 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 03:45:55,810 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:45:55,828 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2018-01-21 03:45:55,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 03:45:55,834 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:45:55,835 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 03:45:55,835 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 03:45:55,839 INFO L82 PathProgramCache]: Analyzing trace with hash 195400, now seen corresponding path program 1 times [2018-01-21 03:45:55,841 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:45:55,883 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:45:55,884 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:45:55,884 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:45:55,884 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:45:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:45:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:45:55,945 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:45:55,951 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:45:55,959 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:45:55,959 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:45:55,959 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:45:55,960 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:45:55,960 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:45:55,960 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:45:55,960 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:45:55,960 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 03:45:55,961 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:45:55,964 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2018-01-21 03:45:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-21 03:45:55,966 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:45:55,967 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 03:45:55,967 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:45:55,967 INFO L82 PathProgramCache]: Analyzing trace with hash 499029481, now seen corresponding path program 1 times [2018-01-21 03:45:55,967 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:45:55,968 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:45:55,969 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:45:55,969 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:45:55,969 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:45:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:45:56,005 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:45:56,156 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 03:45:56,158 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:45:56,158 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:45:56,159 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:45:56,161 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:45:56,172 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:45:56,173 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:45:56,175 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 2 states. [2018-01-21 03:45:56,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:45:56,203 INFO L93 Difference]: Finished difference Result 124 states and 150 transitions. [2018-01-21 03:45:56,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:45:56,205 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2018-01-21 03:45:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:45:56,218 INFO L225 Difference]: With dead ends: 124 [2018-01-21 03:45:56,218 INFO L226 Difference]: Without dead ends: 81 [2018-01-21 03:45:56,222 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 03:45:56,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-01-21 03:45:56,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-01-21 03:45:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-01-21 03:45:56,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2018-01-21 03:45:56,259 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 23 [2018-01-21 03:45:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:45:56,260 INFO L432 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2018-01-21 03:45:56,260 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:45:56,260 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2018-01-21 03:45:56,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-21 03:45:56,261 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:45:56,261 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] [2018-01-21 03:45:56,261 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:45:56,261 INFO L82 PathProgramCache]: Analyzing trace with hash -245872207, now seen corresponding path program 1 times [2018-01-21 03:45:56,261 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:45:56,262 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:45:56,262 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:45:56,262 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:45:56,263 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:45:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:45:56,287 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:45:56,381 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 03:45:56,381 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:45:56,382 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 03:45:56,382 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:45:56,383 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 03:45:56,384 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 03:45:56,384 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 03:45:56,384 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand 5 states. [2018-01-21 03:45:56,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:45:56,561 INFO L93 Difference]: Finished difference Result 141 states and 160 transitions. [2018-01-21 03:45:56,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 03:45:56,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-01-21 03:45:56,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:45:56,566 INFO L225 Difference]: With dead ends: 141 [2018-01-21 03:45:56,566 INFO L226 Difference]: Without dead ends: 125 [2018-01-21 03:45:56,567 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 03:45:56,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-01-21 03:45:56,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2018-01-21 03:45:56,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-01-21 03:45:56,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2018-01-21 03:45:56,580 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 27 [2018-01-21 03:45:56,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:45:56,580 INFO L432 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2018-01-21 03:45:56,580 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 03:45:56,580 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2018-01-21 03:45:56,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-21 03:45:56,582 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:45:56,582 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] [2018-01-21 03:45:56,582 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:45:56,583 INFO L82 PathProgramCache]: Analyzing trace with hash -130557319, now seen corresponding path program 1 times [2018-01-21 03:45:56,583 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:45:56,584 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:45:56,584 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:45:56,584 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:45:56,584 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:45:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:45:56,610 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:45:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 03:45:56,695 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:45:56,695 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 03:45:56,695 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:45:56,696 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 03:45:56,696 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 03:45:56,696 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 03:45:56,696 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 4 states. [2018-01-21 03:45:56,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:45:56,729 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2018-01-21 03:45:56,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 03:45:56,729 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2018-01-21 03:45:56,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:45:56,731 INFO L225 Difference]: With dead ends: 129 [2018-01-21 03:45:56,731 INFO L226 Difference]: Without dead ends: 90 [2018-01-21 03:45:56,732 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 [2018-01-21 03:45:56,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-01-21 03:45:56,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2018-01-21 03:45:56,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-01-21 03:45:56,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2018-01-21 03:45:56,741 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 48 [2018-01-21 03:45:56,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:45:56,742 INFO L432 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2018-01-21 03:45:56,742 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 03:45:56,742 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2018-01-21 03:45:56,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-01-21 03:45:56,744 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:45:56,744 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] [2018-01-21 03:45:56,744 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:45:56,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1094978108, now seen corresponding path program 1 times [2018-01-21 03:45:56,745 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:45:56,746 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:45:56,746 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:45:56,746 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:45:56,746 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:45:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:45:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:45:56,809 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:45:56,818 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:45:56,825 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:45:56,826 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:45:56,837 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:45:56,837 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:45:56,837 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:45:56,837 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:45:56,837 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:45:56,837 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:45:56,837 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:45:56,838 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 03:45:56,838 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:45:56,839 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2018-01-21 03:45:56,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 03:45:56,840 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:45:56,840 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 03:45:56,840 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 03:45:56,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1898919954, now seen corresponding path program 1 times [2018-01-21 03:45:56,840 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:45:56,841 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:45:56,841 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:45:56,841 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:45:56,841 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:45:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:45:56,851 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:45:56,866 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 03:45:56,866 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:45:56,867 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:45:56,867 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:45:56,867 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:45:56,867 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:45:56,868 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:45:56,868 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 2 states. [2018-01-21 03:45:56,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:45:56,873 INFO L93 Difference]: Finished difference Result 124 states and 150 transitions. [2018-01-21 03:45:56,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:45:56,873 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-01-21 03:45:56,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:45:56,875 INFO L225 Difference]: With dead ends: 124 [2018-01-21 03:45:56,875 INFO L226 Difference]: Without dead ends: 79 [2018-01-21 03:45:56,875 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 03:45:56,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-01-21 03:45:56,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-01-21 03:45:56,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-01-21 03:45:56,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2018-01-21 03:45:56,882 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 21 [2018-01-21 03:45:56,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:45:56,882 INFO L432 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2018-01-21 03:45:56,882 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:45:56,882 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2018-01-21 03:45:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-21 03:45:56,883 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:45:56,883 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] [2018-01-21 03:45:56,884 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 03:45:56,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1934937526, now seen corresponding path program 1 times [2018-01-21 03:45:56,884 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:45:56,885 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:45:56,885 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:45:56,885 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:45:56,885 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:45:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:45:56,897 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:45:56,947 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 03:45:56,947 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:45:56,947 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 03:45:56,947 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:45:56,948 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 03:45:56,948 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 03:45:56,948 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 03:45:56,948 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 5 states. [2018-01-21 03:45:57,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:45:57,118 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2018-01-21 03:45:57,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 03:45:57,118 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-01-21 03:45:57,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:45:57,120 INFO L225 Difference]: With dead ends: 137 [2018-01-21 03:45:57,120 INFO L226 Difference]: Without dead ends: 123 [2018-01-21 03:45:57,121 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 03:45:57,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-01-21 03:45:57,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 83. [2018-01-21 03:45:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-01-21 03:45:57,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2018-01-21 03:45:57,130 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 25 [2018-01-21 03:45:57,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:45:57,131 INFO L432 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2018-01-21 03:45:57,131 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 03:45:57,131 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2018-01-21 03:45:57,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-21 03:45:57,132 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:45:57,132 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] [2018-01-21 03:45:57,132 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 03:45:57,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1827795070, now seen corresponding path program 1 times [2018-01-21 03:45:57,133 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:45:57,134 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:45:57,134 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:45:57,134 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:45:57,134 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:45:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:45:57,151 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:45:57,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 03:45:57,193 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:45:57,193 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 03:45:57,193 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:45:57,194 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 03:45:57,195 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 03:45:57,195 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 03:45:57,195 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 4 states. [2018-01-21 03:45:57,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:45:57,237 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2018-01-21 03:45:57,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 03:45:57,238 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2018-01-21 03:45:57,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:45:57,239 INFO L225 Difference]: With dead ends: 125 [2018-01-21 03:45:57,239 INFO L226 Difference]: Without dead ends: 88 [2018-01-21 03:45:57,240 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 [2018-01-21 03:45:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-01-21 03:45:57,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2018-01-21 03:45:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-01-21 03:45:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2018-01-21 03:45:57,252 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 46 [2018-01-21 03:45:57,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:45:57,252 INFO L432 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2018-01-21 03:45:57,252 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 03:45:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2018-01-21 03:45:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-21 03:45:57,254 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:45:57,254 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] [2018-01-21 03:45:57,254 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 03:45:57,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1002255617, now seen corresponding path program 1 times [2018-01-21 03:45:57,255 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:45:57,256 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:45:57,256 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:45:57,256 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:45:57,256 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:45:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:45:57,273 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:45:57,467 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 03:45:57,468 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:45:57,468 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:45:57,469 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 49 with the following transitions: [2018-01-21 03:45:57,471 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [14], [17], [18], [19], [25], [29], [31], [34], [67], [71], [75], [77], [81], [82], [83], [90], [92], [100], [102], [107], [108], [109], [115], [119], [125], [126], [130], [134], [138], [140], [141], [142], [143], [151], [153], [157], [159], [160], [161], [167], [168], [169] [2018-01-21 03:45:57,538 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 03:45:57,538 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