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_smtcomp.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 10:56:21,659 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 10:56:21,662 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 10:56:21,679 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 10:56:21,680 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 10:56:21,681 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 10:56:21,682 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 10:56:21,683 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 10:56:21,686 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 10:56:21,687 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 10:56:21,688 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 10:56:21,688 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 10:56:21,689 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 10:56:21,690 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 10:56:21,691 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 10:56:21,694 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 10:56:21,696 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 10:56:21,698 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 10:56:21,700 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 10:56:21,701 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 10:56:21,703 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 10:56:21,708 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 10:56:21,709 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 10:56:21,710 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_smtcomp.epf [2018-01-21 10:56:21,734 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 10:56:21,734 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 10:56:21,735 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 10:56:21,735 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 10:56:21,735 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 10:56:21,736 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 10:56:21,736 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 10:56:21,736 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 10:56:21,737 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 10:56:21,737 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 10:56:21,737 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 10:56:21,737 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 10:56:21,737 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 10:56:21,737 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 10:56:21,738 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 10:56:21,738 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 10:56:21,738 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 10:56:21,738 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 10:56:21,738 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 10:56:21,739 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 10:56:21,739 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 10:56:21,739 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 10:56:21,739 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 10:56:21,739 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 10:56:21,739 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 10:56:21,740 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 10:56:21,740 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 10:56:21,740 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 10:56:21,740 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 10:56:21,740 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 10:56:21,741 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 10:56:21,741 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 10:56:21,741 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 10:56:21,741 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 10:56:21,741 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 10:56:21,741 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 10:56:21,742 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 10:56:21,742 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 10:56:21,743 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 10:56:21,776 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 10:56:21,822 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 10:56:21,825 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 10:56:21,827 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 10:56:21,827 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 10:56:21,828 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1_true-unreach-call_true-valid-memsafety.i [2018-01-21 10:56:21,991 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 10:56:21,995 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 10:56:21,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 10:56:21,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 10:56:22,003 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 10:56:22,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 10:56:21" (1/1) ... [2018-01-21 10:56:22,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a254274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:56:22, skipping insertion in model container [2018-01-21 10:56:22,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 10:56:21" (1/1) ... [2018-01-21 10:56:22,026 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 10:56:22,068 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 10:56:22,207 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 10:56:22,229 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 10:56:22,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:56:22 WrapperNode [2018-01-21 10:56:22,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 10:56:22,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 10:56:22,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 10:56:22,239 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 10:56:22,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:56:22" (1/1) ... [2018-01-21 10:56:22,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:56:22" (1/1) ... [2018-01-21 10:56:22,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:56:22" (1/1) ... [2018-01-21 10:56:22,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:56:22" (1/1) ... [2018-01-21 10:56:22,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:56:22" (1/1) ... [2018-01-21 10:56:22,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:56:22" (1/1) ... [2018-01-21 10:56:22,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:56:22" (1/1) ... [2018-01-21 10:56:22,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 10:56:22,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 10:56:22,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 10:56:22,275 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 10:56:22,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:56:22" (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 10:56:22,324 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 10:56:22,325 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 10:56:22,325 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 10:56:22,325 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 10:56:22,325 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 10:56:22,325 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 10:56:22,325 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 10:56:22,325 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 10:56:22,325 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 10:56:22,325 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 10:56:22,325 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 10:56:22,326 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 10:56:22,326 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 10:56:22,326 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 10:56:22,326 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 10:56:22,326 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 10:56:22,326 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 10:56:22,578 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 10:56:22,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 10:56:22 BoogieIcfgContainer [2018-01-21 10:56:22,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 10:56:22,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 10:56:22,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 10:56:22,613 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 10:56:22,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 10:56:21" (1/3) ... [2018-01-21 10:56:22,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eae356e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 10:56:22, skipping insertion in model container [2018-01-21 10:56:22,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:56:22" (2/3) ... [2018-01-21 10:56:22,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eae356e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 10:56:22, skipping insertion in model container [2018-01-21 10:56:22,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 10:56:22" (3/3) ... [2018-01-21 10:56:22,617 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-rb-cnstr_1_true-unreach-call_true-valid-memsafety.i [2018-01-21 10:56:22,626 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 10:56:22,652 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 10:56:22,696 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 10:56:22,696 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 10:56:22,696 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 10:56:22,696 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 10:56:22,697 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 10:56:22,697 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 10:56:22,697 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 10:56:22,697 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 10:56:22,697 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 10:56:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2018-01-21 10:56:22,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 10:56:22,719 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:56:22,720 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 10:56:22,720 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 10:56:22,723 INFO L82 PathProgramCache]: Analyzing trace with hash 202351, now seen corresponding path program 1 times [2018-01-21 10:56:22,725 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:56:22,769 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:56:22,769 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:56:22,770 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:56:22,770 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:56:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 10:56:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 10:56:22,817 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 10:56:22,822 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:56:22,828 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 10:56:22,829 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 10:56:22,829 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 10:56:22,829 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 10:56:22,829 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 10:56:22,829 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 10:56:22,829 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 10:56:22,829 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 10:56:22,829 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 10:56:22,832 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2018-01-21 10:56:22,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-21 10:56:22,834 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:56:22,834 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:56:22,834 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:56:22,834 INFO L82 PathProgramCache]: Analyzing trace with hash -579641887, now seen corresponding path program 1 times [2018-01-21 10:56:22,834 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:56:22,836 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:56:22,836 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:56:22,836 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:56:22,836 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:56:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:56:22,864 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:56:22,900 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 10:56:22,901 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:56:22,901 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 10:56:22,901 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:56:22,904 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 10:56:23,011 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 10:56:23,012 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 10:56:23,013 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 2 states. [2018-01-21 10:56:23,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:56:23,037 INFO L93 Difference]: Finished difference Result 117 states and 154 transitions. [2018-01-21 10:56:23,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 10:56:23,038 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2018-01-21 10:56:23,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:56:23,049 INFO L225 Difference]: With dead ends: 117 [2018-01-21 10:56:23,050 INFO L226 Difference]: Without dead ends: 70 [2018-01-21 10:56:23,052 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 10:56:23,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-01-21 10:56:23,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-01-21 10:56:23,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-01-21 10:56:23,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2018-01-21 10:56:23,088 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 20 [2018-01-21 10:56:23,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:56:23,088 INFO L432 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2018-01-21 10:56:23,088 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 10:56:23,088 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2018-01-21 10:56:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-21 10:56:23,090 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:56:23,090 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] [2018-01-21 10:56:23,090 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:56:23,091 INFO L82 PathProgramCache]: Analyzing trace with hash -675072438, now seen corresponding path program 1 times [2018-01-21 10:56:23,091 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:56:23,092 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:56:23,093 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:56:23,093 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:56:23,093 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:56:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:56:23,115 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:56:23,206 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 10:56:23,206 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:56:23,206 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 10:56:23,207 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:56:23,208 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 10:56:23,209 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 10:56:23,209 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 10:56:23,209 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand 5 states. [2018-01-21 10:56:23,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:56:23,361 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2018-01-21 10:56:23,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 10:56:23,362 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2018-01-21 10:56:23,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:56:23,364 INFO L225 Difference]: With dead ends: 118 [2018-01-21 10:56:23,364 INFO L226 Difference]: Without dead ends: 99 [2018-01-21 10:56:23,365 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 10:56:23,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-01-21 10:56:23,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 74. [2018-01-21 10:56:23,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-01-21 10:56:23,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2018-01-21 10:56:23,375 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 29 [2018-01-21 10:56:23,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:56:23,376 INFO L432 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2018-01-21 10:56:23,376 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 10:56:23,376 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2018-01-21 10:56:23,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-01-21 10:56:23,378 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:56:23,378 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] [2018-01-21 10:56:23,378 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:56:23,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1367476593, now seen corresponding path program 1 times [2018-01-21 10:56:23,378 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:56:23,380 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:56:23,380 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:56:23,381 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:56:23,381 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:56:23,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 10:56:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 10:56:23,441 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 10:56:23,450 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:56:23,456 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:56:23,456 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:56:23,469 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 10:56:23,469 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 10:56:23,469 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 10:56:23,469 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 10:56:23,469 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 10:56:23,469 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 10:56:23,470 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 10:56:23,470 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 10:56:23,470 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 10:56:23,472 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2018-01-21 10:56:23,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-21 10:56:23,473 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:56:23,473 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:56:23,473 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 10:56:23,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1698925306, now seen corresponding path program 1 times [2018-01-21 10:56:23,474 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:56:23,475 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:56:23,475 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:56:23,475 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:56:23,475 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:56:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:56:23,487 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:56:23,501 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 10:56:23,502 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:56:23,502 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 10:56:23,502 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:56:23,502 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 10:56:23,502 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 10:56:23,503 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 10:56:23,503 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 2 states. [2018-01-21 10:56:23,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:56:23,508 INFO L93 Difference]: Finished difference Result 117 states and 154 transitions. [2018-01-21 10:56:23,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 10:56:23,508 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-01-21 10:56:23,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:56:23,509 INFO L225 Difference]: With dead ends: 117 [2018-01-21 10:56:23,509 INFO L226 Difference]: Without dead ends: 68 [2018-01-21 10:56:23,509 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 10:56:23,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-01-21 10:56:23,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-01-21 10:56:23,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-01-21 10:56:23,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2018-01-21 10:56:23,514 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 18 [2018-01-21 10:56:23,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:56:23,514 INFO L432 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2018-01-21 10:56:23,514 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 10:56:23,514 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2018-01-21 10:56:23,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-21 10:56:23,515 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:56:23,515 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] [2018-01-21 10:56:23,515 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 10:56:23,515 INFO L82 PathProgramCache]: Analyzing trace with hash -456567889, now seen corresponding path program 1 times [2018-01-21 10:56:23,516 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:56:23,517 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:56:23,517 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:56:23,517 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:56:23,517 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:56:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:56:23,527 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:56:23,584 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 10:56:23,585 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:56:23,585 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 10:56:23,585 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:56:23,585 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 10:56:23,586 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 10:56:23,586 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 10:56:23,586 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 5 states. [2018-01-21 10:56:23,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:56:23,739 INFO L93 Difference]: Finished difference Result 114 states and 125 transitions. [2018-01-21 10:56:23,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 10:56:23,739 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-01-21 10:56:23,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:56:23,740 INFO L225 Difference]: With dead ends: 114 [2018-01-21 10:56:23,740 INFO L226 Difference]: Without dead ends: 97 [2018-01-21 10:56:23,741 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 10:56:23,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-01-21 10:56:23,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 72. [2018-01-21 10:56:23,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-01-21 10:56:23,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2018-01-21 10:56:23,747 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 27 [2018-01-21 10:56:23,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:56:23,747 INFO L432 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2018-01-21 10:56:23,748 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 10:56:23,748 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2018-01-21 10:56:23,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-21 10:56:23,749 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:56:23,749 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] [2018-01-21 10:56:23,749 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 10:56:23,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1118740172, now seen corresponding path program 1 times [2018-01-21 10:56:23,750 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:56:23,751 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:56:23,751 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:56:23,751 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:56:23,751 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:56:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:56:23,768 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:56:23,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 10:56:23,913 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:56:23,913 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 10:56:23,914 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 42 with the following transitions: [2018-01-21 10:56:23,916 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [8], [10], [13], [39], [43], [48], [52], [60], [61], [66], [70], [78], [82], [84], [85], [128], [130], [131], [137], [141], [143], [144], [155], [156], [157], [158], [159], [164], [166], [167], [168], [174], [175], [176] [2018-01-21 10:56:23,981 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 10:56:23,982 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