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-reverse_simple_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 06:31:03,655 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 06:31:03,657 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 06:31:03,671 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 06:31:03,671 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 06:31:03,672 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 06:31:03,673 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 06:31:03,675 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 06:31:03,677 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 06:31:03,677 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 06:31:03,678 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 06:31:03,678 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 06:31:03,679 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 06:31:03,680 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 06:31:03,680 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 06:31:03,683 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 06:31:03,685 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 06:31:03,687 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 06:31:03,689 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 06:31:03,690 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 06:31:03,692 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 06:31:03,697 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 06:31:03,698 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 06:31:03,698 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 06:31:03,708 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 06:31:03,708 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 06:31:03,709 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 06:31:03,709 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 06:31:03,710 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 06:31:03,710 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 06:31:03,710 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 06:31:03,710 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 06:31:03,711 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 06:31:03,711 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 06:31:03,711 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 06:31:03,711 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 06:31:03,712 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 06:31:03,712 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 06:31:03,712 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 06:31:03,712 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 06:31:03,712 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 06:31:03,712 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 06:31:03,713 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 06:31:03,713 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 06:31:03,713 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 06:31:03,713 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 06:31:03,713 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 06:31:03,714 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 06:31:03,714 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 06:31:03,714 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 06:31:03,714 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 06:31:03,714 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 06:31:03,715 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 06:31:03,715 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 06:31:03,715 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 06:31:03,715 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 06:31:03,715 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 06:31:03,715 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 06:31:03,716 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 06:31:03,716 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 06:31:03,716 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 06:31:03,717 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 06:31:03,717 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 06:31:03,751 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 06:31:03,760 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 06:31:03,763 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 06:31:03,764 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 06:31:03,765 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 06:31:03,765 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-reverse_simple_true-unreach-call_true-valid-memsafety.i [2018-01-21 06:31:03,945 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 06:31:03,950 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 06:31:03,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 06:31:03,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 06:31:03,956 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 06:31:03,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 06:31:03" (1/1) ... [2018-01-21 06:31:03,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3724a30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:03, skipping insertion in model container [2018-01-21 06:31:03,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 06:31:03" (1/1) ... [2018-01-21 06:31:03,980 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 06:31:04,022 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 06:31:04,140 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 06:31:04,159 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 06:31:04,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:04 WrapperNode [2018-01-21 06:31:04,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 06:31:04,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 06:31:04,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 06:31:04,169 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 06:31:04,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:04" (1/1) ... [2018-01-21 06:31:04,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:04" (1/1) ... [2018-01-21 06:31:04,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:04" (1/1) ... [2018-01-21 06:31:04,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:04" (1/1) ... [2018-01-21 06:31:04,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:04" (1/1) ... [2018-01-21 06:31:04,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:04" (1/1) ... [2018-01-21 06:31:04,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:04" (1/1) ... [2018-01-21 06:31:04,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 06:31:04,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 06:31:04,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 06:31:04,205 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 06:31:04,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:04" (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 06:31:04,258 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 06:31:04,259 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 06:31:04,259 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 06:31:04,259 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 06:31:04,259 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 06:31:04,259 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 06:31:04,259 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 06:31:04,260 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 06:31:04,260 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 06:31:04,260 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 06:31:04,260 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 06:31:04,260 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 06:31:04,260 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 06:31:04,261 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 06:31:04,261 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 06:31:04,261 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 06:31:04,261 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 06:31:04,606 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 06:31:04,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 06:31:04 BoogieIcfgContainer [2018-01-21 06:31:04,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 06:31:04,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 06:31:04,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 06:31:04,610 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 06:31:04,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 06:31:03" (1/3) ... [2018-01-21 06:31:04,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24908f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 06:31:04, skipping insertion in model container [2018-01-21 06:31:04,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:31:04" (2/3) ... [2018-01-21 06:31:04,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24908f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 06:31:04, skipping insertion in model container [2018-01-21 06:31:04,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 06:31:04" (3/3) ... [2018-01-21 06:31:04,613 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-reverse_simple_true-unreach-call_true-valid-memsafety.i [2018-01-21 06:31:04,620 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 06:31:04,627 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 06:31:04,665 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:31:04,665 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:31:04,665 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:31:04,665 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:31:04,665 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:31:04,666 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:31:04,666 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:31:04,666 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 06:31:04,666 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:31:04,684 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2018-01-21 06:31:04,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 06:31:04,689 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:31:04,690 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 06:31:04,690 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 06:31:04,694 INFO L82 PathProgramCache]: Analyzing trace with hash 227176, now seen corresponding path program 1 times [2018-01-21 06:31:04,696 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:31:04,739 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:04,739 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:31:04,739 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:04,739 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:31:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:31:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:31:04,793 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 06:31:04,798 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 06:31:04,806 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:31:04,806 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:31:04,806 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:31:04,806 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:31:04,806 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:31:04,807 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:31:04,807 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:31:04,807 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 06:31:04,807 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:31:04,810 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2018-01-21 06:31:04,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-21 06:31:04,813 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:31:04,814 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 06:31:04,814 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:31:04,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1937358689, now seen corresponding path program 1 times [2018-01-21 06:31:04,814 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:31:04,816 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:04,816 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:31:04,816 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:04,816 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:31:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:31:04,851 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:31:04,981 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 06:31:04,983 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:31:04,983 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 06:31:04,983 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:31:04,986 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 06:31:04,996 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 06:31:04,997 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 06:31:04,999 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 2 states. [2018-01-21 06:31:05,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:31:05,024 INFO L93 Difference]: Finished difference Result 148 states and 190 transitions. [2018-01-21 06:31:05,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 06:31:05,026 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2018-01-21 06:31:05,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:31:05,036 INFO L225 Difference]: With dead ends: 148 [2018-01-21 06:31:05,036 INFO L226 Difference]: Without dead ends: 81 [2018-01-21 06:31:05,039 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 06:31:05,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-01-21 06:31:05,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-01-21 06:31:05,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-01-21 06:31:05,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2018-01-21 06:31:05,074 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 30 [2018-01-21 06:31:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:31:05,074 INFO L432 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2018-01-21 06:31:05,074 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 06:31:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2018-01-21 06:31:05,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-21 06:31:05,076 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:31:05,076 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 06:31:05,076 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:31:05,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1988690091, now seen corresponding path program 1 times [2018-01-21 06:31:05,077 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:31:05,078 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:05,078 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:31:05,078 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:05,078 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:31:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:31:05,115 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:31:05,450 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 06:31:05,450 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:31:05,450 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-21 06:31:05,450 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:31:05,452 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-21 06:31:05,452 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-21 06:31:05,453 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-01-21 06:31:05,453 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 8 states. [2018-01-21 06:31:05,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:31:05,879 INFO L93 Difference]: Finished difference Result 170 states and 191 transitions. [2018-01-21 06:31:05,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-21 06:31:05,902 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2018-01-21 06:31:05,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:31:05,906 INFO L225 Difference]: With dead ends: 170 [2018-01-21 06:31:05,906 INFO L226 Difference]: Without dead ends: 109 [2018-01-21 06:31:05,907 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2018-01-21 06:31:05,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-01-21 06:31:05,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2018-01-21 06:31:05,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-01-21 06:31:05,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2018-01-21 06:31:05,916 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 41 [2018-01-21 06:31:05,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:31:05,916 INFO L432 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2018-01-21 06:31:05,916 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-21 06:31:05,916 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2018-01-21 06:31:05,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-21 06:31:05,917 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:31:05,917 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 06:31:05,917 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:31:05,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1854676585, now seen corresponding path program 1 times [2018-01-21 06:31:05,918 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:31:05,919 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:05,919 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:31:05,919 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:05,919 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:31:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:31:05,935 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:31:06,047 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 06:31:06,047 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:31:06,047 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 06:31:06,048 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:31:06,048 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 06:31:06,048 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 06:31:06,048 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-21 06:31:06,049 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 6 states. [2018-01-21 06:31:06,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:31:06,269 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2018-01-21 06:31:06,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-21 06:31:06,269 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2018-01-21 06:31:06,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:31:06,271 INFO L225 Difference]: With dead ends: 140 [2018-01-21 06:31:06,271 INFO L226 Difference]: Without dead ends: 101 [2018-01-21 06:31:06,272 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 06:31:06,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-01-21 06:31:06,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2018-01-21 06:31:06,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-01-21 06:31:06,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2018-01-21 06:31:06,282 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 41 [2018-01-21 06:31:06,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:31:06,283 INFO L432 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2018-01-21 06:31:06,283 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 06:31:06,283 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2018-01-21 06:31:06,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-21 06:31:06,285 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:31:06,285 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 06:31:06,285 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:31:06,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1544345424, now seen corresponding path program 1 times [2018-01-21 06:31:06,286 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:31:06,287 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:06,287 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:31:06,287 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:06,287 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:31:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:31:06,306 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:31:06,395 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 06:31:06,396 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:31:06,396 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 06:31:06,396 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:31:06,397 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 06:31:06,398 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 06:31:06,399 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 06:31:06,399 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 5 states. [2018-01-21 06:31:06,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:31:06,522 INFO L93 Difference]: Finished difference Result 166 states and 182 transitions. [2018-01-21 06:31:06,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 06:31:06,522 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2018-01-21 06:31:06,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:31:06,524 INFO L225 Difference]: With dead ends: 166 [2018-01-21 06:31:06,524 INFO L226 Difference]: Without dead ends: 137 [2018-01-21 06:31:06,524 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 06:31:06,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-01-21 06:31:06,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2018-01-21 06:31:06,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-01-21 06:31:06,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2018-01-21 06:31:06,532 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 44 [2018-01-21 06:31:06,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:31:06,532 INFO L432 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2018-01-21 06:31:06,532 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 06:31:06,532 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2018-01-21 06:31:06,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-01-21 06:31:06,533 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:31:06,533 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 06:31:06,533 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:31:06,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1172413608, now seen corresponding path program 1 times [2018-01-21 06:31:06,534 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:31:06,535 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:06,535 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:31:06,535 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:31:06,535 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:31:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:31:06,553 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:31:06,635 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 06:31:06,635 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 06:31:06,635 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 06:31:06,636 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 51 with the following transitions: [2018-01-21 06:31:06,638 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 06:31:06,694 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 06:31:06,695 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