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_precise.epf -i ../../../trunk/examples/svcomp/memsafety-ext/tree_stack_true-valid-memsafety_false-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 05:49:16,513 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 05:49:16,515 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 05:49:16,529 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 05:49:16,529 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 05:49:16,530 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 05:49:16,531 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 05:49:16,533 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 05:49:16,535 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 05:49:16,536 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 05:49:16,536 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 05:49:16,537 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 05:49:16,537 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 05:49:16,538 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 05:49:16,539 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 05:49:16,541 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 05:49:16,544 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 05:49:16,546 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 05:49:16,547 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 05:49:16,548 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 05:49:16,550 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 05:49:16,556 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_precise.epf [2018-01-21 05:49:16,566 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 05:49:16,566 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 05:49:16,567 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 05:49:16,567 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 05:49:16,568 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 05:49:16,568 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 05:49:16,568 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 05:49:16,568 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 05:49:16,569 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 05:49:16,569 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 05:49:16,569 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 05:49:16,569 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 05:49:16,570 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 05:49:16,570 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 05:49:16,570 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 05:49:16,570 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 05:49:16,570 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 05:49:16,571 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 05:49:16,571 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 05:49:16,571 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 05:49:16,571 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 05:49:16,571 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 05:49:16,572 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 05:49:16,572 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 05:49:16,572 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 05:49:16,572 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 05:49:16,572 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 05:49:16,573 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 05:49:16,573 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 05:49:16,573 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 05:49:16,573 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 05:49:16,573 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 05:49:16,574 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 05:49:16,574 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 05:49:16,574 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 05:49:16,574 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 05:49:16,574 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 05:49:16,575 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 05:49:16,576 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 05:49:16,610 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 05:49:16,623 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 05:49:16,627 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 05:49:16,628 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 05:49:16,629 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 05:49:16,629 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety-ext/tree_stack_true-valid-memsafety_false-termination.i [2018-01-21 05:49:16,811 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 05:49:16,815 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 05:49:16,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 05:49:16,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 05:49:16,820 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 05:49:16,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:49:16" (1/1) ... [2018-01-21 05:49:16,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@726014cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:49:16, skipping insertion in model container [2018-01-21 05:49:16,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:49:16" (1/1) ... [2018-01-21 05:49:16,841 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:49:16,881 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:49:16,998 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:49:17,024 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:49:17,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:49:17 WrapperNode [2018-01-21 05:49:17,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 05:49:17,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 05:49:17,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 05:49:17,032 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 05:49:17,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:49:17" (1/1) ... [2018-01-21 05:49:17,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:49:17" (1/1) ... [2018-01-21 05:49:17,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:49:17" (1/1) ... [2018-01-21 05:49:17,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:49:17" (1/1) ... [2018-01-21 05:49:17,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:49:17" (1/1) ... [2018-01-21 05:49:17,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:49:17" (1/1) ... [2018-01-21 05:49:17,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:49:17" (1/1) ... [2018-01-21 05:49:17,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 05:49:17,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 05:49:17,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 05:49:17,070 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 05:49:17,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:49:17" (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 05:49:17,127 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 05:49:17,127 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 05:49:17,127 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 05:49:17,127 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 05:49:17,127 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 05:49:17,127 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 05:49:17,128 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 05:49:17,128 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 05:49:17,128 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 05:49:17,128 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 05:49:17,128 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 05:49:17,128 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 05:49:17,129 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 05:49:17,129 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 05:49:17,480 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 05:49:17,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:49:17 BoogieIcfgContainer [2018-01-21 05:49:17,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 05:49:17,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 05:49:17,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 05:49:17,485 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 05:49:17,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 05:49:16" (1/3) ... [2018-01-21 05:49:17,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a745b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:49:17, skipping insertion in model container [2018-01-21 05:49:17,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:49:17" (2/3) ... [2018-01-21 05:49:17,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a745b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:49:17, skipping insertion in model container [2018-01-21 05:49:17,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:49:17" (3/3) ... [2018-01-21 05:49:17,489 INFO L105 eAbstractionObserver]: Analyzing ICFG tree_stack_true-valid-memsafety_false-termination.i [2018-01-21 05:49:17,498 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 05:49:17,506 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 05:49:17,545 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:49:17,545 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:49:17,545 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:49:17,545 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:49:17,545 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:49:17,545 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:49:17,545 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:49:17,546 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 05:49:17,546 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:49:17,568 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states. [2018-01-21 05:49:17,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 05:49:17,574 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:49:17,576 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 05:49:17,576 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 05:49:17,580 INFO L82 PathProgramCache]: Analyzing trace with hash 178748, now seen corresponding path program 1 times [2018-01-21 05:49:17,582 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:49:17,623 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:49:17,623 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:49:17,623 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:49:17,623 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:49:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:49:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:49:17,686 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:49:17,693 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:49:17,700 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:49:17,700 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:49:17,700 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:49:17,700 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:49:17,700 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:49:17,700 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:49:17,700 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:49:17,700 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 05:49:17,700 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:49:17,703 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states. [2018-01-21 05:49:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-21 05:49:17,705 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:49:17,705 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] [2018-01-21 05:49:17,705 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:49:17,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1961960643, now seen corresponding path program 1 times [2018-01-21 05:49:17,706 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:49:17,707 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:49:17,707 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:49:17,707 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:49:17,707 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:49:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:49:17,733 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:49:17,767 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 05:49:17,769 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:49:17,770 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:49:17,770 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:49:17,773 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:49:17,873 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:49:17,873 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:49:17,875 INFO L87 Difference]: Start difference. First operand 85 states. Second operand 2 states. [2018-01-21 05:49:17,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:49:17,901 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2018-01-21 05:49:17,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:49:17,903 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2018-01-21 05:49:17,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:49:17,915 INFO L225 Difference]: With dead ends: 160 [2018-01-21 05:49:17,915 INFO L226 Difference]: Without dead ends: 82 [2018-01-21 05:49:17,918 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 05:49:17,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-01-21 05:49:17,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-01-21 05:49:17,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-01-21 05:49:17,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2018-01-21 05:49:17,951 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 20 [2018-01-21 05:49:17,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:49:17,952 INFO L432 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2018-01-21 05:49:17,952 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:49:17,952 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2018-01-21 05:49:17,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-21 05:49:17,953 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:49:17,953 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 05:49:17,953 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:49:17,954 INFO L82 PathProgramCache]: Analyzing trace with hash -2069207582, now seen corresponding path program 1 times [2018-01-21 05:49:17,954 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:49:17,955 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:49:17,955 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:49:17,955 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:49:17,955 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:49:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:49:17,982 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:49:18,058 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 05:49:18,058 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:49:18,058 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 05:49:18,059 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:49:18,060 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 05:49:18,061 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 05:49:18,061 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 05:49:18,061 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 4 states. [2018-01-21 05:49:18,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:49:18,119 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2018-01-21 05:49:18,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 05:49:18,119 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2018-01-21 05:49:18,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:49:18,121 INFO L225 Difference]: With dead ends: 91 [2018-01-21 05:49:18,121 INFO L226 Difference]: Without dead ends: 86 [2018-01-21 05:49:18,122 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 05:49:18,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-21 05:49:18,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2018-01-21 05:49:18,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-01-21 05:49:18,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2018-01-21 05:49:18,131 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 23 [2018-01-21 05:49:18,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:49:18,131 INFO L432 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2018-01-21 05:49:18,131 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 05:49:18,132 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2018-01-21 05:49:18,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-21 05:49:18,133 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:49:18,133 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:49:18,133 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:49:18,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1378605137, now seen corresponding path program 1 times [2018-01-21 05:49:18,134 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:49:18,135 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:49:18,135 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:49:18,135 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:49:18,135 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:49:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:49:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:49:18,203 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:49:18,211 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:49:18,216 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:49:18,217 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:49:18,230 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:49:18,230 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:49:18,230 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:49:18,230 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:49:18,230 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:49:18,230 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:49:18,230 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:49:18,230 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 05:49:18,230 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:49:18,232 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states. [2018-01-21 05:49:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-21 05:49:18,233 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:49:18,233 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:49:18,233 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 05:49:18,233 INFO L82 PathProgramCache]: Analyzing trace with hash -757348010, now seen corresponding path program 1 times [2018-01-21 05:49:18,233 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:49:18,234 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:49:18,234 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:49:18,234 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:49:18,234 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:49:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:49:18,242 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:49:18,254 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 05:49:18,254 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:49:18,254 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:49:18,254 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:49:18,255 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:49:18,255 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:49:18,255 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:49:18,255 INFO L87 Difference]: Start difference. First operand 85 states. Second operand 2 states. [2018-01-21 05:49:18,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:49:18,262 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2018-01-21 05:49:18,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:49:18,262 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-01-21 05:49:18,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:49:18,263 INFO L225 Difference]: With dead ends: 160 [2018-01-21 05:49:18,263 INFO L226 Difference]: Without dead ends: 80 [2018-01-21 05:49:18,264 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 05:49:18,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-01-21 05:49:18,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-01-21 05:49:18,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-01-21 05:49:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2018-01-21 05:49:18,269 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 18 [2018-01-21 05:49:18,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:49:18,269 INFO L432 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2018-01-21 05:49:18,269 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:49:18,269 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2018-01-21 05:49:18,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 05:49:18,270 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:49:18,270 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 05:49:18,270 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 05:49:18,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1655945531, now seen corresponding path program 1 times [2018-01-21 05:49:18,270 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:49:18,271 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:49:18,271 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:49:18,271 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:49:18,271 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:49:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:49:18,280 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:49:18,319 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 05:49:18,320 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:49:18,320 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 05:49:18,320 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:49:18,320 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 05:49:18,320 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 05:49:18,320 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 05:49:18,321 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand 4 states. [2018-01-21 05:49:18,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:49:18,354 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2018-01-21 05:49:18,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 05:49:18,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2018-01-21 05:49:18,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:49:18,355 INFO L225 Difference]: With dead ends: 87 [2018-01-21 05:49:18,355 INFO L226 Difference]: Without dead ends: 84 [2018-01-21 05:49:18,356 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 05:49:18,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-01-21 05:49:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2018-01-21 05:49:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-01-21 05:49:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2018-01-21 05:49:18,363 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 21 [2018-01-21 05:49:18,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:49:18,364 INFO L432 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2018-01-21 05:49:18,364 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 05:49:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2018-01-21 05:49:18,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-21 05:49:18,365 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:49:18,366 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:49:18,366 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 05:49:18,366 INFO L82 PathProgramCache]: Analyzing trace with hash 990743112, now seen corresponding path program 1 times [2018-01-21 05:49:18,366 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:49:18,367 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:49:18,367 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:49:18,367 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:49:18,368 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:49:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:49:18,392 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:49:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:49:19,192 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:49:19,193 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 05:49:19,194 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 34 with the following transitions: [2018-01-21 05:49:19,196 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [8], [9], [10], [14], [16], [19], [102], [103], [104], [105], [106], [110], [114], [116], [117], [118], [119], [120], [121], [122], [133], [135], [146], [148], [152], [154], [155], [156], [157] [2018-01-21 05:49:19,253 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 05:49:19,254 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