java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-reverse_simple_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 00:15:19,335 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 00:15:19,337 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 00:15:19,353 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 00:15:19,353 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 00:15:19,354 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 00:15:19,355 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 00:15:19,356 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 00:15:19,358 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 00:15:19,358 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 00:15:19,359 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-01-21 00:15:19,379 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ.epf [2018-01-21 00:15:19,389 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 00:15:19,389 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 00:15:19,390 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 00:15:19,390 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 00:15:19,390 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 00:15:19,390 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 00:15:19,391 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 00:15:19,391 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 00:15:19,391 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 00:15:19,392 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 00:15:19,392 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 00:15:19,392 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 00:15:19,392 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 00:15:19,392 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 00:15:19,393 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 00:15:19,393 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 00:15:19,393 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 00:15:19,393 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 00:15:19,393 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 00:15:19,393 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 00:15:19,394 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 00:15:19,394 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 00:15:19,394 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 00:15:19,394 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 00:15:19,395 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 00:15:19,395 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 00:15:19,395 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 00:15:19,395 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 00:15:19,395 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 00:15:19,396 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 00:15:19,396 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 00:15:19,396 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 00:15:19,396 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 00:15:19,396 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 00:15:19,396 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 00:15:19,397 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 00:15:19,398 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 00:15:19,398 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 00:15:19,433 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 00:15:19,445 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 00:15:19,449 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 00:15:19,450 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 00:15:19,451 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 00:15:19,452 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-reverse_simple_true-unreach-call_true-valid-memsafety.i [2018-01-21 00:15:19,614 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 00:15:19,620 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 00:15:19,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 00:15:19,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 00:15:19,625 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 00:15:19,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:15:19" (1/1) ... [2018-01-21 00:15:19,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6479bd29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:19, skipping insertion in model container [2018-01-21 00:15:19,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:15:19" (1/1) ... [2018-01-21 00:15:19,641 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:15:19,683 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:15:19,801 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:15:19,820 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:15:19,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:19 WrapperNode [2018-01-21 00:15:19,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 00:15:19,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 00:15:19,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 00:15:19,827 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 00:15:19,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:19" (1/1) ... [2018-01-21 00:15:19,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:19" (1/1) ... [2018-01-21 00:15:19,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:19" (1/1) ... [2018-01-21 00:15:19,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:19" (1/1) ... [2018-01-21 00:15:19,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:19" (1/1) ... [2018-01-21 00:15:19,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:19" (1/1) ... [2018-01-21 00:15:19,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:19" (1/1) ... [2018-01-21 00:15:19,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 00:15:19,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 00:15:19,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 00:15:19,876 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 00:15:19,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:19" (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 00:15:19,931 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 00:15:19,931 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 00:15:19,932 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 00:15:19,932 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 00:15:19,932 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 00:15:19,932 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 00:15:19,932 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 00:15:19,933 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 00:15:19,933 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 00:15:19,933 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 00:15:19,933 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 00:15:19,933 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 00:15:19,933 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 00:15:19,933 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 00:15:19,934 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 00:15:19,934 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 00:15:19,934 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 00:15:20,336 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 00:15:20,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:15:20 BoogieIcfgContainer [2018-01-21 00:15:20,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 00:15:20,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 00:15:20,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 00:15:20,339 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 00:15:20,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 12:15:19" (1/3) ... [2018-01-21 00:15:20,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4662ddff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:15:20, skipping insertion in model container [2018-01-21 00:15:20,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:19" (2/3) ... [2018-01-21 00:15:20,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4662ddff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:15:20, skipping insertion in model container [2018-01-21 00:15:20,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:15:20" (3/3) ... [2018-01-21 00:15:20,343 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-reverse_simple_true-unreach-call_true-valid-memsafety.i [2018-01-21 00:15:20,352 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 00:15:20,360 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 00:15:20,407 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:15:20,407 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:15:20,407 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:15:20,407 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:15:20,407 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:15:20,408 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:15:20,408 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:15:20,408 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 00:15:20,409 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:15:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2018-01-21 00:15:20,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 00:15:20,436 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:15:20,437 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 00:15:20,437 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 00:15:20,442 INFO L82 PathProgramCache]: Analyzing trace with hash 227176, now seen corresponding path program 1 times [2018-01-21 00:15:20,445 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:15:20,487 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:20,487 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:15:20,487 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:20,487 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:15:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:15:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:15:20,540 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:15:20,546 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:15:20,553 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:15:20,553 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:15:20,553 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:15:20,553 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:15:20,554 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:15:20,554 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:15:20,554 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:15:20,554 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 00:15:20,554 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:15:20,557 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2018-01-21 00:15:20,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-21 00:15:20,560 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:15:20,561 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:15:20,561 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:15:20,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1937358689, now seen corresponding path program 1 times [2018-01-21 00:15:20,561 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:15:20,562 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:20,563 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:15:20,563 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:20,563 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:15:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:15:20,597 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:15:20,720 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 00:15:20,722 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:15:20,723 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:15:20,723 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:15:20,726 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:15:20,735 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:15:20,736 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:15:20,739 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 2 states. [2018-01-21 00:15:20,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:15:20,768 INFO L93 Difference]: Finished difference Result 148 states and 190 transitions. [2018-01-21 00:15:20,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:15:20,770 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2018-01-21 00:15:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:15:20,778 INFO L225 Difference]: With dead ends: 148 [2018-01-21 00:15:20,778 INFO L226 Difference]: Without dead ends: 81 [2018-01-21 00:15:20,780 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 00:15:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-01-21 00:15:20,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-01-21 00:15:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-01-21 00:15:20,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2018-01-21 00:15:20,814 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 30 [2018-01-21 00:15:20,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:15:20,814 INFO L432 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2018-01-21 00:15:20,814 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:15:20,814 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2018-01-21 00:15:20,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-21 00:15:20,816 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:15:20,816 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:15:20,816 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:15:20,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1988690091, now seen corresponding path program 1 times [2018-01-21 00:15:20,816 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:15:20,817 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:20,817 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:15:20,817 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:20,818 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:15:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:15:20,852 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:15:21,245 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 00:15:21,245 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:15:21,245 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-21 00:15:21,246 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:15:21,247 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-21 00:15:21,248 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-21 00:15:21,248 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-01-21 00:15:21,248 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 8 states. [2018-01-21 00:15:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:15:21,700 INFO L93 Difference]: Finished difference Result 170 states and 191 transitions. [2018-01-21 00:15:21,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-21 00:15:21,701 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2018-01-21 00:15:21,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:15:21,705 INFO L225 Difference]: With dead ends: 170 [2018-01-21 00:15:21,705 INFO L226 Difference]: Without dead ends: 109 [2018-01-21 00:15:21,707 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2018-01-21 00:15:21,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-01-21 00:15:21,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2018-01-21 00:15:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-01-21 00:15:21,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2018-01-21 00:15:21,719 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 41 [2018-01-21 00:15:21,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:15:21,719 INFO L432 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2018-01-21 00:15:21,720 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-21 00:15:21,720 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2018-01-21 00:15:21,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-21 00:15:21,721 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:15:21,721 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:15:21,722 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:15:21,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1854676585, now seen corresponding path program 1 times [2018-01-21 00:15:21,722 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:15:21,723 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:21,723 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:15:21,724 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:21,724 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:15:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:15:21,741 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:15:21,881 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 00:15:21,882 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:15:21,882 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 00:15:21,882 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:15:21,882 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 00:15:21,883 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 00:15:21,883 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-21 00:15:21,883 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 6 states. [2018-01-21 00:15:22,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:15:22,093 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2018-01-21 00:15:22,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-21 00:15:22,093 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2018-01-21 00:15:22,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:15:22,095 INFO L225 Difference]: With dead ends: 140 [2018-01-21 00:15:22,095 INFO L226 Difference]: Without dead ends: 101 [2018-01-21 00:15:22,095 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-01-21 00:15:22,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-01-21 00:15:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2018-01-21 00:15:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-01-21 00:15:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2018-01-21 00:15:22,102 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 41 [2018-01-21 00:15:22,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:15:22,102 INFO L432 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2018-01-21 00:15:22,102 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 00:15:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2018-01-21 00:15:22,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-21 00:15:22,103 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:15:22,103 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:15:22,104 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:15:22,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1544345424, now seen corresponding path program 1 times [2018-01-21 00:15:22,104 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:15:22,105 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:22,105 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:15:22,105 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:22,105 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:15:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:15:22,125 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:15:22,184 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 00:15:22,185 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:15:22,185 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 00:15:22,185 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:15:22,186 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 00:15:22,186 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 00:15:22,186 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:15:22,186 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 5 states. [2018-01-21 00:15:22,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:15:22,323 INFO L93 Difference]: Finished difference Result 166 states and 182 transitions. [2018-01-21 00:15:22,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:15:22,324 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2018-01-21 00:15:22,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:15:22,325 INFO L225 Difference]: With dead ends: 166 [2018-01-21 00:15:22,326 INFO L226 Difference]: Without dead ends: 137 [2018-01-21 00:15:22,326 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 00:15:22,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-01-21 00:15:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2018-01-21 00:15:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-01-21 00:15:22,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2018-01-21 00:15:22,335 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 44 [2018-01-21 00:15:22,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:15:22,336 INFO L432 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2018-01-21 00:15:22,336 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 00:15:22,336 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2018-01-21 00:15:22,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-01-21 00:15:22,337 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:15:22,337 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:15:22,338 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:15:22,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1172413608, now seen corresponding path program 1 times [2018-01-21 00:15:22,338 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:15:22,339 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:22,339 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:15:22,339 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:22,339 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:15:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:15:22,358 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:15:22,422 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 00:15:22,423 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:15:22,423 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:15:22,424 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 51 with the following transitions: [2018-01-21 00:15:22,426 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [8], [10], [13], [25], [29], [31], [32], [37], [41], [69], [74], [78], [84], [85], [88], [89], [90], [91], [92], [93], [94], [101], [105], [109], [111], [112], [113], [114], [115], [119], [123], [127], [172], [176], [180], [189], [190], [192], [193], [198], [199], [200], [201], [202] [2018-01-21 00:15:22,488 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 00:15:22,489 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