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/forester-heap/sll-sorted_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 06:31:09,652 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 06:31:09,654 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 06:31:09,669 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 06:31:09,669 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 06:31:09,670 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 06:31:09,670 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 06:31:09,672 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 06:31:09,675 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 06:31:09,675 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 06:31:09,676 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 06:31:09,677 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 06:31:09,678 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 06:31:09,679 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 06:31:09,680 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 06:31:09,683 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 06:31:09,685 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 06:31:09,687 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 06:31:09,689 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 06:31:09,690 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 06:31:09,693 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 06:31:09,698 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 06:31:09,699 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 06:31:09,700 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 06:31:09,709 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 06:31:09,710 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 06:31:09,711 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 06:31:09,711 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 06:31:09,711 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 06:31:09,711 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 06:31:09,711 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 06:31:09,711 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 06:31:09,712 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 06:31:09,712 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 06:31:09,712 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 06:31:09,712 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 06:31:09,712 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 06:31:09,712 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 06:31:09,713 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 06:31:09,713 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 06:31:09,713 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 06:31:09,713 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 06:31:09,713 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 06:31:09,713 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 06:31:09,713 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 06:31:09,714 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 06:31:09,714 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 06:31:09,714 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 06:31:09,714 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 06:31:09,714 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 06:31:09,714 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 06:31:09,715 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 06:31:09,715 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 06:31:09,715 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 06:31:09,715 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 06:31:09,715 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 06:31:09,715 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 06:31:09,715 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 06:31:09,715 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 06:31:09,716 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 06:31:09,716 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 06:31:09,716 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 06:31:09,716 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 06:31:09,751 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 06:31:09,762 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 06:31:09,766 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 06:31:09,767 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 06:31:09,768 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 06:31:09,768 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-sorted_true-unreach-call_true-valid-memsafety.i [2018-01-21 06:31:09,934 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 06:31:09,938 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 06:31:09,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 06:31:09,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 06:31:09,944 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 06:31:09,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 06:31:09" (1/1) ... [2018-01-21 06:31:09,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4454cf94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:09, skipping insertion in model container [2018-01-21 06:31:09,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 06:31:09" (1/1) ... [2018-01-21 06:31:09,963 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 06:31:10,004 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 06:31:10,126 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 06:31:10,148 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 06:31:10,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:10 WrapperNode [2018-01-21 06:31:10,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 06:31:10,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 06:31:10,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 06:31:10,157 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 06:31:10,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:10" (1/1) ... [2018-01-21 06:31:10,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:10" (1/1) ... [2018-01-21 06:31:10,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:10" (1/1) ... [2018-01-21 06:31:10,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:10" (1/1) ... [2018-01-21 06:31:10,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:10" (1/1) ... [2018-01-21 06:31:10,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:10" (1/1) ... [2018-01-21 06:31:10,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:10" (1/1) ... [2018-01-21 06:31:10,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 06:31:10,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 06:31:10,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 06:31:10,198 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 06:31:10,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:10" (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 06:31:10,247 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 06:31:10,247 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 06:31:10,247 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 06:31:10,247 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 06:31:10,247 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 06:31:10,248 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 06:31:10,248 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 06:31:10,248 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 06:31:10,248 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 06:31:10,248 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 06:31:10,248 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 06:31:10,248 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 06:31:10,248 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 06:31:10,248 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 06:31:10,248 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 06:31:10,248 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 06:31:10,249 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 06:31:10,672 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 06:31:10,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 06:31:10 BoogieIcfgContainer [2018-01-21 06:31:10,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 06:31:10,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 06:31:10,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 06:31:10,677 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 06:31:10,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 06:31:09" (1/3) ... [2018-01-21 06:31:10,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae3ffa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 06:31:10, skipping insertion in model container [2018-01-21 06:31:10,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:10" (2/3) ... [2018-01-21 06:31:10,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae3ffa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 06:31:10, skipping insertion in model container [2018-01-21 06:31:10,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 06:31:10" (3/3) ... [2018-01-21 06:31:10,680 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-sorted_true-unreach-call_true-valid-memsafety.i [2018-01-21 06:31:10,687 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 06:31:10,693 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 06:31:10,734 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:31:10,734 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:31:10,734 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:31:10,734 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:31:10,734 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:31:10,734 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:31:10,735 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:31:10,735 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 06:31:10,735 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:31:10,754 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states. [2018-01-21 06:31:10,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 06:31:10,760 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:31:10,761 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 06:31:10,761 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 06:31:10,765 INFO L82 PathProgramCache]: Analyzing trace with hash 330448, now seen corresponding path program 1 times [2018-01-21 06:31:10,767 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:31:10,808 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:10,808 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:31:10,808 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:10,808 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:31:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:31:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:31:10,862 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 06:31:10,868 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 06:31:10,876 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:31:10,876 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:31:10,876 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:31:10,877 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:31:10,877 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:31:10,877 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:31:10,877 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:31:10,877 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 06:31:10,877 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:31:10,881 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states. [2018-01-21 06:31:10,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-21 06:31:10,901 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:31:10,902 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] [2018-01-21 06:31:10,902 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:31:10,902 INFO L82 PathProgramCache]: Analyzing trace with hash 439581356, now seen corresponding path program 1 times [2018-01-21 06:31:10,902 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:31:10,903 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:10,903 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:31:10,903 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:10,904 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:31:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:31:10,939 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:31:11,060 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 06:31:11,062 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:31:11,062 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 06:31:11,062 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:31:11,068 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 06:31:11,083 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 06:31:11,084 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 06:31:11,086 INFO L87 Difference]: Start difference. First operand 109 states. Second operand 2 states. [2018-01-21 06:31:11,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:31:11,115 INFO L93 Difference]: Finished difference Result 194 states and 266 transitions. [2018-01-21 06:31:11,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 06:31:11,117 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2018-01-21 06:31:11,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:31:11,131 INFO L225 Difference]: With dead ends: 194 [2018-01-21 06:31:11,131 INFO L226 Difference]: Without dead ends: 106 [2018-01-21 06:31:11,135 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 06:31:11,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-01-21 06:31:11,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-01-21 06:31:11,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-01-21 06:31:11,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2018-01-21 06:31:11,177 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 32 [2018-01-21 06:31:11,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:31:11,177 INFO L432 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2018-01-21 06:31:11,178 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 06:31:11,178 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2018-01-21 06:31:11,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-01-21 06:31:11,179 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:31:11,179 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, 1, 1, 1, 1, 1] [2018-01-21 06:31:11,179 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:31:11,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1763191735, now seen corresponding path program 1 times [2018-01-21 06:31:11,180 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:31:11,181 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:11,181 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:31:11,181 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:11,181 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:31:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:31:11,207 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:31:11,260 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 06:31:11,260 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:31:11,260 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 06:31:11,261 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:31:11,263 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 06:31:11,263 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 06:31:11,263 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 06:31:11,264 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand 3 states. [2018-01-21 06:31:11,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:31:11,319 INFO L93 Difference]: Finished difference Result 226 states and 253 transitions. [2018-01-21 06:31:11,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 06:31:11,320 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2018-01-21 06:31:11,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:31:11,324 INFO L225 Difference]: With dead ends: 226 [2018-01-21 06:31:11,324 INFO L226 Difference]: Without dead ends: 130 [2018-01-21 06:31:11,325 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 06:31:11,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-01-21 06:31:11,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 117. [2018-01-21 06:31:11,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-01-21 06:31:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 129 transitions. [2018-01-21 06:31:11,333 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 129 transitions. Word has length 49 [2018-01-21 06:31:11,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:31:11,333 INFO L432 AbstractCegarLoop]: Abstraction has 117 states and 129 transitions. [2018-01-21 06:31:11,333 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 06:31:11,334 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 129 transitions. [2018-01-21 06:31:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-01-21 06:31:11,335 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:31:11,335 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 06:31:11,335 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:31:11,335 INFO L82 PathProgramCache]: Analyzing trace with hash 651675214, now seen corresponding path program 1 times [2018-01-21 06:31:11,336 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:31:11,336 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:11,337 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:31:11,337 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:11,337 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:31:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:31:11,375 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:31:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-21 06:31:11,483 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:31:11,483 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 06:31:11,483 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:31:11,484 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 06:31:11,484 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 06:31:11,484 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 06:31:11,484 INFO L87 Difference]: Start difference. First operand 117 states and 129 transitions. Second operand 5 states. [2018-01-21 06:31:11,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:31:11,659 INFO L93 Difference]: Finished difference Result 208 states and 230 transitions. [2018-01-21 06:31:11,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 06:31:11,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2018-01-21 06:31:11,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:31:11,662 INFO L225 Difference]: With dead ends: 208 [2018-01-21 06:31:11,662 INFO L226 Difference]: Without dead ends: 197 [2018-01-21 06:31:11,663 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 06:31:11,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-01-21 06:31:11,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2018-01-21 06:31:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-01-21 06:31:11,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 141 transitions. [2018-01-21 06:31:11,678 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 141 transitions. Word has length 61 [2018-01-21 06:31:11,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:31:11,679 INFO L432 AbstractCegarLoop]: Abstraction has 127 states and 141 transitions. [2018-01-21 06:31:11,679 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 06:31:11,679 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 141 transitions. [2018-01-21 06:31:11,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-01-21 06:31:11,682 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:31:11,682 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 06:31:11,682 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:31:11,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1008289951, now seen corresponding path program 1 times [2018-01-21 06:31:11,683 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:31:11,684 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:11,684 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:31:11,684 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:11,684 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:31:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:31:11,714 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:31:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-01-21 06:31:11,813 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:31:11,814 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 06:31:11,814 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:31:11,814 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 06:31:11,815 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 06:31:11,815 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-21 06:31:11,815 INFO L87 Difference]: Start difference. First operand 127 states and 141 transitions. Second operand 6 states. [2018-01-21 06:31:12,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:31:12,215 INFO L93 Difference]: Finished difference Result 243 states and 267 transitions. [2018-01-21 06:31:12,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-21 06:31:12,216 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2018-01-21 06:31:12,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:31:12,218 INFO L225 Difference]: With dead ends: 243 [2018-01-21 06:31:12,218 INFO L226 Difference]: Without dead ends: 197 [2018-01-21 06:31:12,219 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-21 06:31:12,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-01-21 06:31:12,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2018-01-21 06:31:12,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-01-21 06:31:12,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 140 transitions. [2018-01-21 06:31:12,234 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 140 transitions. Word has length 79 [2018-01-21 06:31:12,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:31:12,235 INFO L432 AbstractCegarLoop]: Abstraction has 127 states and 140 transitions. [2018-01-21 06:31:12,235 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 06:31:12,236 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 140 transitions. [2018-01-21 06:31:12,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-01-21 06:31:12,238 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:31:12,238 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 06:31:12,239 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:31:12,240 INFO L82 PathProgramCache]: Analyzing trace with hash -159123330, now seen corresponding path program 1 times [2018-01-21 06:31:12,240 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:31:12,241 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:12,241 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:31:12,241 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:12,241 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:31:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:31:12,266 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:31:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-01-21 06:31:12,414 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:31:12,414 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-21 06:31:12,414 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:31:12,415 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 06:31:12,415 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 06:31:12,415 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-01-21 06:31:12,416 INFO L87 Difference]: Start difference. First operand 127 states and 140 transitions. Second operand 7 states. [2018-01-21 06:31:12,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:31:12,745 INFO L93 Difference]: Finished difference Result 222 states and 246 transitions. [2018-01-21 06:31:12,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-21 06:31:12,746 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2018-01-21 06:31:12,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:31:12,747 INFO L225 Difference]: With dead ends: 222 [2018-01-21 06:31:12,747 INFO L226 Difference]: Without dead ends: 148 [2018-01-21 06:31:12,748 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-01-21 06:31:12,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-01-21 06:31:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 133. [2018-01-21 06:31:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-01-21 06:31:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2018-01-21 06:31:12,759 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 81 [2018-01-21 06:31:12,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:31:12,760 INFO L432 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2018-01-21 06:31:12,760 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 06:31:12,760 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2018-01-21 06:31:12,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-01-21 06:31:12,762 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:31:12,762 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 06:31:12,762 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:31:12,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1056516608, now seen corresponding path program 1 times [2018-01-21 06:31:12,763 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:31:12,764 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:12,764 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:31:12,764 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:12,764 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:31:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:31:12,789 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:31:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-01-21 06:31:13,021 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 06:31:13,021 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 06:31:13,021 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 82 with the following transitions: [2018-01-21 06:31:13,023 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [8], [10], [13], [15], [16], [17], [18], [19], [20], [21], [24], [30], [31], [39], [43], [48], [52], [58], [62], [64], [65], [73], [77], [106], [108], [109], [114], [118], [145], [146], [147], [148], [149], [152], [153], [161], [165], [167], [170], [171], [172], [178], [226], [230], [232], [233], [234], [238], [239], [244], [248], [256], [261], [265], [271], [272], [276], [280], [284], [286], [287], [288], [289], [293], [294], [296], [297], [302], [303], [304], [305], [306] [2018-01-21 06:31:13,075 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 06:31:13,076 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