java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf -i ../../../trunk/examples/svcomp/memsafety-ext/tree_stack_true-valid-memsafety_false-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 08:31:27,203 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 08:31:27,231 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 08:31:27,245 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 08:31:27,245 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 08:31:27,246 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 08:31:27,247 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 08:31:27,248 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 08:31:27,250 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 08:31:27,250 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 08:31:27,251 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-01-21 08:31:27,272 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf [2018-01-21 08:31:27,288 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 08:31:27,288 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 08:31:27,289 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 08:31:27,289 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 08:31:27,290 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 08:31:27,290 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 08:31:27,290 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 08:31:27,290 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 08:31:27,290 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 08:31:27,291 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 08:31:27,291 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 08:31:27,291 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 08:31:27,292 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 08:31:27,292 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 08:31:27,292 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 08:31:27,292 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 08:31:27,292 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 08:31:27,293 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 08:31:27,293 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 08:31:27,293 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 08:31:27,293 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 08:31:27,293 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 08:31:27,293 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 08:31:27,294 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 08:31:27,294 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 08:31:27,294 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 08:31:27,294 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 08:31:27,294 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:31:27,295 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 08:31:27,295 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 08:31:27,295 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 08:31:27,295 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 08:31:27,295 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 08:31:27,296 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 08:31:27,296 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 08:31:27,296 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 08:31:27,296 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 08:31:27,296 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 08:31:27,297 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 08:31:27,297 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 08:31:27,331 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 08:31:27,383 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 08:31:27,387 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 08:31:27,388 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 08:31:27,388 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 08:31:27,389 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety-ext/tree_stack_true-valid-memsafety_false-termination.i [2018-01-21 08:31:27,556 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 08:31:27,561 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 08:31:27,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 08:31:27,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 08:31:27,567 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 08:31:27,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:31:27" (1/1) ... [2018-01-21 08:31:27,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@726f39e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:31:27, skipping insertion in model container [2018-01-21 08:31:27,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:31:27" (1/1) ... [2018-01-21 08:31:27,589 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:31:27,630 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:31:27,755 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:31:27,781 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:31:27,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:31:27 WrapperNode [2018-01-21 08:31:27,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 08:31:27,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 08:31:27,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 08:31:27,790 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 08:31:27,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:31:27" (1/1) ... [2018-01-21 08:31:27,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:31:27" (1/1) ... [2018-01-21 08:31:27,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:31:27" (1/1) ... [2018-01-21 08:31:27,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:31:27" (1/1) ... [2018-01-21 08:31:27,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:31:27" (1/1) ... [2018-01-21 08:31:27,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:31:27" (1/1) ... [2018-01-21 08:31:27,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:31:27" (1/1) ... [2018-01-21 08:31:27,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 08:31:27,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 08:31:27,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 08:31:27,824 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 08:31:27,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:31:27" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:31:27,901 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 08:31:27,901 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 08:31:27,901 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 08:31:27,901 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 08:31:27,901 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 08:31:27,901 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 08:31:27,901 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 08:31:27,902 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 08:31:27,902 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 08:31:27,902 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 08:31:27,902 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 08:31:27,902 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 08:31:27,902 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 08:31:27,903 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 08:31:28,265 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 08:31:28,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:31:28 BoogieIcfgContainer [2018-01-21 08:31:28,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 08:31:28,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 08:31:28,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 08:31:28,269 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 08:31:28,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 08:31:27" (1/3) ... [2018-01-21 08:31:28,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57051268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:31:28, skipping insertion in model container [2018-01-21 08:31:28,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:31:27" (2/3) ... [2018-01-21 08:31:28,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57051268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:31:28, skipping insertion in model container [2018-01-21 08:31:28,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:31:28" (3/3) ... [2018-01-21 08:31:28,273 INFO L105 eAbstractionObserver]: Analyzing ICFG tree_stack_true-valid-memsafety_false-termination.i [2018-01-21 08:31:28,280 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 08:31:28,296 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 08:31:28,347 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:31:28,348 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:31:28,348 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:31:28,348 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:31:28,348 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:31:28,348 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:31:28,348 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:31:28,348 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 08:31:28,349 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:31:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states. [2018-01-21 08:31:28,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 08:31:28,372 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:31:28,373 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 08:31:28,373 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 08:31:28,377 INFO L82 PathProgramCache]: Analyzing trace with hash 178748, now seen corresponding path program 1 times [2018-01-21 08:31:28,379 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:31:28,418 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:31:28,419 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:31:28,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:31:28,419 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:31:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:31:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:31:28,469 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:31:28,475 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:31:28,482 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:31:28,483 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:31:28,483 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:31:28,483 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:31:28,483 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:31:28,483 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:31:28,483 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:31:28,484 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 08:31:28,484 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:31:28,487 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states. [2018-01-21 08:31:28,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-21 08:31:28,489 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:31:28,489 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 08:31:28,489 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:31:28,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1961960643, now seen corresponding path program 1 times [2018-01-21 08:31:28,490 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:31:28,491 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:31:28,491 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:31:28,491 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:31:28,491 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:31:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:31:28,516 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:31:28,550 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 08:31:28,552 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:31:28,552 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:31:28,552 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:31:28,555 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:31:28,649 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:31:28,650 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:31:28,652 INFO L87 Difference]: Start difference. First operand 85 states. Second operand 2 states. [2018-01-21 08:31:28,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:31:28,679 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2018-01-21 08:31:28,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:31:28,681 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2018-01-21 08:31:28,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:31:28,693 INFO L225 Difference]: With dead ends: 160 [2018-01-21 08:31:28,694 INFO L226 Difference]: Without dead ends: 82 [2018-01-21 08:31:28,696 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 08:31:28,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-01-21 08:31:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-01-21 08:31:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-01-21 08:31:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2018-01-21 08:31:28,730 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 20 [2018-01-21 08:31:28,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:31:28,731 INFO L432 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2018-01-21 08:31:28,731 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:31:28,731 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2018-01-21 08:31:28,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-21 08:31:28,732 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:31:28,732 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 08:31:28,732 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:31:28,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2069207582, now seen corresponding path program 1 times [2018-01-21 08:31:28,733 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:31:28,734 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:31:28,734 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:31:28,734 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:31:28,734 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:31:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:31:28,761 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:31:28,827 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 08:31:28,828 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:31:28,828 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 08:31:28,828 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:31:28,830 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 08:31:28,830 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 08:31:28,831 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 08:31:28,831 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 4 states. [2018-01-21 08:31:28,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:31:28,894 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2018-01-21 08:31:28,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 08:31:28,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2018-01-21 08:31:28,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:31:28,897 INFO L225 Difference]: With dead ends: 91 [2018-01-21 08:31:28,897 INFO L226 Difference]: Without dead ends: 86 [2018-01-21 08:31:28,898 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 08:31:28,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-21 08:31:28,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2018-01-21 08:31:28,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-01-21 08:31:28,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2018-01-21 08:31:28,908 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 23 [2018-01-21 08:31:28,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:31:28,908 INFO L432 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2018-01-21 08:31:28,909 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 08:31:28,909 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2018-01-21 08:31:28,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-21 08:31:28,910 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:31:28,910 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 08:31:28,911 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:31:28,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1378605137, now seen corresponding path program 1 times [2018-01-21 08:31:28,911 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:31:28,912 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:31:28,912 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:31:28,912 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:31:28,913 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:31:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:31:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:31:28,994 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:31:29,004 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:31:29,012 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:31:29,012 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:31:29,028 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:31:29,028 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:31:29,028 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:31:29,028 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:31:29,028 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:31:29,028 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:31:29,028 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:31:29,029 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 08:31:29,029 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:31:29,031 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states. [2018-01-21 08:31:29,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-21 08:31:29,032 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:31:29,032 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 08:31:29,032 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 08:31:29,032 INFO L82 PathProgramCache]: Analyzing trace with hash -757348010, now seen corresponding path program 1 times [2018-01-21 08:31:29,032 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:31:29,033 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:31:29,033 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:31:29,033 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:31:29,033 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:31:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:31:29,041 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:31:29,054 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 08:31:29,055 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:31:29,055 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:31:29,055 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:31:29,055 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:31:29,055 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:31:29,056 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:31:29,056 INFO L87 Difference]: Start difference. First operand 85 states. Second operand 2 states. [2018-01-21 08:31:29,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:31:29,065 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2018-01-21 08:31:29,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:31:29,065 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-01-21 08:31:29,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:31:29,066 INFO L225 Difference]: With dead ends: 160 [2018-01-21 08:31:29,066 INFO L226 Difference]: Without dead ends: 80 [2018-01-21 08:31:29,067 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 08:31:29,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-01-21 08:31:29,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-01-21 08:31:29,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-01-21 08:31:29,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2018-01-21 08:31:29,074 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 18 [2018-01-21 08:31:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:31:29,075 INFO L432 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2018-01-21 08:31:29,075 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:31:29,075 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2018-01-21 08:31:29,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 08:31:29,076 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:31:29,076 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 08:31:29,076 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 08:31:29,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1655945531, now seen corresponding path program 1 times [2018-01-21 08:31:29,076 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:31:29,077 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:31:29,078 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:31:29,078 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:31:29,078 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:31:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:31:29,091 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:31:29,130 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 08:31:29,130 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:31:29,130 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 08:31:29,130 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:31:29,131 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 08:31:29,131 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 08:31:29,131 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 08:31:29,131 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand 4 states. [2018-01-21 08:31:29,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:31:29,171 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2018-01-21 08:31:29,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 08:31:29,172 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2018-01-21 08:31:29,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:31:29,173 INFO L225 Difference]: With dead ends: 87 [2018-01-21 08:31:29,173 INFO L226 Difference]: Without dead ends: 84 [2018-01-21 08:31:29,174 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 08:31:29,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-01-21 08:31:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2018-01-21 08:31:29,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-01-21 08:31:29,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2018-01-21 08:31:29,180 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 21 [2018-01-21 08:31:29,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:31:29,181 INFO L432 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2018-01-21 08:31:29,181 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 08:31:29,181 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2018-01-21 08:31:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-21 08:31:29,182 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:31:29,182 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 08:31:29,183 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 08:31:29,183 INFO L82 PathProgramCache]: Analyzing trace with hash 990743112, now seen corresponding path program 1 times [2018-01-21 08:31:29,183 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:31:29,184 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:31:29,184 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:31:29,184 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:31:29,184 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:31:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:31:29,209 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:31:29,953 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 08:31:29,953 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:31:29,954 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 08:31:29,955 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 34 with the following transitions: [2018-01-21 08:31:29,957 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 08:31:30,015 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 08:31:30,016 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