java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-01_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 09:08:39,478 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 09:08:39,480 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 09:08:39,495 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 09:08:39,496 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 09:08:39,497 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 09:08:39,498 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 09:08:39,499 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 09:08:39,502 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 09:08:39,502 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 09:08:39,503 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 09:08:39,504 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 09:08:39,505 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 09:08:39,506 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 09:08:39,507 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 09:08:39,509 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 09:08:39,512 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 09:08:39,514 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 09:08:39,515 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 09:08:39,516 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 09:08:39,519 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 09:08:39,524 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 09:08:39,525 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 09:08:39,525 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf [2018-01-21 09:08:39,534 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 09:08:39,534 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 09:08:39,535 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 09:08:39,535 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 09:08:39,535 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 09:08:39,535 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 09:08:39,535 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 09:08:39,535 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 09:08:39,536 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 09:08:39,536 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 09:08:39,536 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 09:08:39,536 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 09:08:39,537 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 09:08:39,537 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 09:08:39,537 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 09:08:39,537 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 09:08:39,537 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 09:08:39,537 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 09:08:39,537 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 09:08:39,537 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 09:08:39,538 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 09:08:39,538 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 09:08:39,538 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 09:08:39,538 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 09:08:39,538 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 09:08:39,539 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 09:08:39,539 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 09:08:39,539 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 09:08:39,539 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 09:08:39,539 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 09:08:39,539 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 09:08:39,540 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 09:08:39,540 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 09:08:39,540 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 09:08:39,540 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 09:08:39,540 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 09:08:39,540 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 09:08:39,540 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 09:08:39,541 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 09:08:39,541 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 09:08:39,575 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 09:08:39,586 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 09:08:39,590 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 09:08:39,591 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 09:08:39,592 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 09:08:39,592 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-01_true-unreach-call_true-valid-memsafety.i [2018-01-21 09:08:39,783 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 09:08:39,788 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 09:08:39,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 09:08:39,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 09:08:39,793 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 09:08:39,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 09:08:39" (1/1) ... [2018-01-21 09:08:39,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@860cd99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:08:39, skipping insertion in model container [2018-01-21 09:08:39,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 09:08:39" (1/1) ... [2018-01-21 09:08:39,811 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 09:08:39,855 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 09:08:39,993 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 09:08:40,022 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 09:08:40,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:08:40 WrapperNode [2018-01-21 09:08:40,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 09:08:40,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 09:08:40,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 09:08:40,071 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 09:08:40,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:08:40" (1/1) ... [2018-01-21 09:08:40,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:08:40" (1/1) ... [2018-01-21 09:08:40,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:08:40" (1/1) ... [2018-01-21 09:08:40,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:08:40" (1/1) ... [2018-01-21 09:08:40,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:08:40" (1/1) ... [2018-01-21 09:08:40,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:08:40" (1/1) ... [2018-01-21 09:08:40,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:08:40" (1/1) ... [2018-01-21 09:08:40,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 09:08:40,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 09:08:40,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 09:08:40,117 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 09:08:40,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:08:40" (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 09:08:40,171 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 09:08:40,171 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 09:08:40,171 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 09:08:40,171 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 09:08:40,171 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 09:08:40,171 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 09:08:40,172 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 09:08:40,172 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 09:08:40,172 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 09:08:40,172 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 09:08:40,172 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 09:08:40,172 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 09:08:40,172 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 09:08:40,172 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 09:08:40,172 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 09:08:40,638 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 09:08:40,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 09:08:40 BoogieIcfgContainer [2018-01-21 09:08:40,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 09:08:40,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 09:08:40,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 09:08:40,643 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 09:08:40,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 09:08:39" (1/3) ... [2018-01-21 09:08:40,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@782d3fa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 09:08:40, skipping insertion in model container [2018-01-21 09:08:40,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:08:40" (2/3) ... [2018-01-21 09:08:40,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@782d3fa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 09:08:40, skipping insertion in model container [2018-01-21 09:08:40,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 09:08:40" (3/3) ... [2018-01-21 09:08:40,647 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-01_true-unreach-call_true-valid-memsafety.i [2018-01-21 09:08:40,656 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 09:08:40,665 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 09:08:40,721 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 09:08:40,721 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 09:08:40,722 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 09:08:40,722 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 09:08:40,722 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 09:08:40,722 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 09:08:40,722 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 09:08:40,723 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 09:08:40,724 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 09:08:40,749 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2018-01-21 09:08:40,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 09:08:40,755 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:08:40,756 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 09:08:40,756 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 09:08:40,761 INFO L82 PathProgramCache]: Analyzing trace with hash 393051, now seen corresponding path program 1 times [2018-01-21 09:08:40,764 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:08:40,807 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:08:40,807 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:08:40,807 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:08:40,808 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:08:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:08:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:08:40,856 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 09:08:40,862 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 09:08:40,869 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 09:08:40,870 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 09:08:40,870 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 09:08:40,870 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 09:08:40,870 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 09:08:40,870 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 09:08:40,870 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 09:08:40,870 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 09:08:40,871 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 09:08:40,875 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2018-01-21 09:08:40,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-21 09:08:40,878 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:08:40,878 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 09:08:40,878 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:08:40,878 INFO L82 PathProgramCache]: Analyzing trace with hash -232031712, now seen corresponding path program 1 times [2018-01-21 09:08:40,878 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:08:40,879 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:08:40,879 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:08:40,879 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:08:40,879 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:08:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:08:40,901 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:08:40,937 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 09:08:40,939 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:08:40,939 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 09:08:40,940 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:08:40,942 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 09:08:41,044 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 09:08:41,045 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 09:08:41,048 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 2 states. [2018-01-21 09:08:41,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:08:41,084 INFO L93 Difference]: Finished difference Result 237 states and 341 transitions. [2018-01-21 09:08:41,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 09:08:41,086 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2018-01-21 09:08:41,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:08:41,099 INFO L225 Difference]: With dead ends: 237 [2018-01-21 09:08:41,099 INFO L226 Difference]: Without dead ends: 120 [2018-01-21 09:08:41,103 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 09:08:41,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-01-21 09:08:41,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-01-21 09:08:41,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-01-21 09:08:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2018-01-21 09:08:41,143 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 23 [2018-01-21 09:08:41,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:08:41,143 INFO L432 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2018-01-21 09:08:41,143 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 09:08:41,143 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2018-01-21 09:08:41,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 09:08:41,144 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:08:41,144 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] [2018-01-21 09:08:41,144 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:08:41,145 INFO L82 PathProgramCache]: Analyzing trace with hash -448715966, now seen corresponding path program 1 times [2018-01-21 09:08:41,145 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:08:41,146 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:08:41,146 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:08:41,146 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:08:41,146 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:08:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:08:41,169 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:08:41,309 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 09:08:41,310 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:08:41,310 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 09:08:41,310 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:08:41,312 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 09:08:41,312 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 09:08:41,312 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 09:08:41,312 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand 5 states. [2018-01-21 09:08:41,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:08:41,558 INFO L93 Difference]: Finished difference Result 280 states and 303 transitions. [2018-01-21 09:08:41,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 09:08:41,558 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2018-01-21 09:08:41,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:08:41,562 INFO L225 Difference]: With dead ends: 280 [2018-01-21 09:08:41,562 INFO L226 Difference]: Without dead ends: 188 [2018-01-21 09:08:41,563 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 09:08:41,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-01-21 09:08:41,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 124. [2018-01-21 09:08:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-01-21 09:08:41,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2018-01-21 09:08:41,572 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 36 [2018-01-21 09:08:41,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:08:41,573 INFO L432 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2018-01-21 09:08:41,573 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 09:08:41,573 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2018-01-21 09:08:41,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-21 09:08:41,574 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:08:41,574 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] [2018-01-21 09:08:41,574 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:08:41,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1412768891, now seen corresponding path program 1 times [2018-01-21 09:08:41,574 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:08:41,575 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:08:41,575 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:08:41,575 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:08:41,576 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:08:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:08:41,593 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:08:41,649 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 09:08:41,649 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:08:41,649 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 09:08:41,649 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:08:41,650 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 09:08:41,650 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 09:08:41,650 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 09:08:41,650 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 5 states. [2018-01-21 09:08:41,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:08:41,764 INFO L93 Difference]: Finished difference Result 206 states and 222 transitions. [2018-01-21 09:08:41,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 09:08:41,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2018-01-21 09:08:41,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:08:41,767 INFO L225 Difference]: With dead ends: 206 [2018-01-21 09:08:41,767 INFO L226 Difference]: Without dead ends: 179 [2018-01-21 09:08:41,768 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 09:08:41,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-01-21 09:08:41,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 128. [2018-01-21 09:08:41,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-01-21 09:08:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2018-01-21 09:08:41,780 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 38 [2018-01-21 09:08:41,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:08:41,781 INFO L432 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2018-01-21 09:08:41,781 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 09:08:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2018-01-21 09:08:41,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-01-21 09:08:41,783 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:08:41,783 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] [2018-01-21 09:08:41,783 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:08:41,784 INFO L82 PathProgramCache]: Analyzing trace with hash -812324167, now seen corresponding path program 1 times [2018-01-21 09:08:41,784 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:08:41,785 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:08:41,785 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:08:41,785 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:08:41,785 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:08:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:08:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:08:41,842 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 09:08:41,853 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 09:08:41,862 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 09:08:41,863 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 09:08:41,882 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 09:08:41,882 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 09:08:41,882 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 09:08:41,882 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 09:08:41,882 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 09:08:41,882 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 09:08:41,882 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 09:08:41,883 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 09:08:41,883 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 09:08:41,885 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2018-01-21 09:08:41,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 09:08:41,886 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:08:41,886 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 09:08:41,887 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 09:08:41,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1381245512, now seen corresponding path program 1 times [2018-01-21 09:08:41,887 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:08:41,888 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:08:41,888 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:08:41,888 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:08:41,889 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:08:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:08:41,895 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:08:41,903 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 09:08:41,903 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:08:41,903 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 09:08:41,903 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:08:41,904 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 09:08:41,904 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 09:08:41,904 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 09:08:41,904 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 2 states. [2018-01-21 09:08:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:08:41,911 INFO L93 Difference]: Finished difference Result 237 states and 341 transitions. [2018-01-21 09:08:41,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 09:08:41,912 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-01-21 09:08:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:08:41,913 INFO L225 Difference]: With dead ends: 237 [2018-01-21 09:08:41,913 INFO L226 Difference]: Without dead ends: 118 [2018-01-21 09:08:41,914 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 09:08:41,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-01-21 09:08:41,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-01-21 09:08:41,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-01-21 09:08:41,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 127 transitions. [2018-01-21 09:08:41,922 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 127 transitions. Word has length 21 [2018-01-21 09:08:41,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:08:41,923 INFO L432 AbstractCegarLoop]: Abstraction has 118 states and 127 transitions. [2018-01-21 09:08:41,923 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 09:08:41,923 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 127 transitions. [2018-01-21 09:08:41,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-21 09:08:41,924 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:08:41,925 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] [2018-01-21 09:08:41,925 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 09:08:41,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1359124646, now seen corresponding path program 1 times [2018-01-21 09:08:41,925 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:08:41,926 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:08:41,926 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:08:41,926 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:08:41,927 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:08:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:08:41,938 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:08:41,997 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 09:08:41,998 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:08:41,998 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 09:08:41,998 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:08:41,998 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 09:08:41,999 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 09:08:41,999 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 09:08:41,999 INFO L87 Difference]: Start difference. First operand 118 states and 127 transitions. Second operand 5 states. [2018-01-21 09:08:42,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:08:42,111 INFO L93 Difference]: Finished difference Result 276 states and 298 transitions. [2018-01-21 09:08:42,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 09:08:42,112 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2018-01-21 09:08:42,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:08:42,114 INFO L225 Difference]: With dead ends: 276 [2018-01-21 09:08:42,114 INFO L226 Difference]: Without dead ends: 186 [2018-01-21 09:08:42,115 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 09:08:42,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-01-21 09:08:42,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 122. [2018-01-21 09:08:42,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-01-21 09:08:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2018-01-21 09:08:42,126 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 34 [2018-01-21 09:08:42,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:08:42,126 INFO L432 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2018-01-21 09:08:42,126 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 09:08:42,126 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2018-01-21 09:08:42,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 09:08:42,128 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:08:42,128 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] [2018-01-21 09:08:42,129 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 09:08:42,130 INFO L82 PathProgramCache]: Analyzing trace with hash -166833059, now seen corresponding path program 1 times [2018-01-21 09:08:42,130 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:08:42,131 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:08:42,131 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:08:42,131 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:08:42,131 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:08:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:08:42,143 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:08:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 09:08:42,184 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:08:42,184 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 09:08:42,185 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:08:42,185 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 09:08:42,185 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 09:08:42,186 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 09:08:42,186 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand 5 states. [2018-01-21 09:08:42,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:08:42,315 INFO L93 Difference]: Finished difference Result 202 states and 218 transitions. [2018-01-21 09:08:42,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 09:08:42,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2018-01-21 09:08:42,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:08:42,316 INFO L225 Difference]: With dead ends: 202 [2018-01-21 09:08:42,317 INFO L226 Difference]: Without dead ends: 177 [2018-01-21 09:08:42,317 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 09:08:42,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-01-21 09:08:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 126. [2018-01-21 09:08:42,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-01-21 09:08:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2018-01-21 09:08:42,326 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 36 [2018-01-21 09:08:42,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:08:42,326 INFO L432 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2018-01-21 09:08:42,326 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 09:08:42,326 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2018-01-21 09:08:42,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-21 09:08:42,328 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:08:42,328 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] [2018-01-21 09:08:42,329 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 09:08:42,329 INFO L82 PathProgramCache]: Analyzing trace with hash -742743919, now seen corresponding path program 1 times [2018-01-21 09:08:42,329 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:08:42,330 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:08:42,330 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:08:42,330 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:08:42,330 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:08:42,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:08:42,350 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:08:42,462 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 09:08:42,462 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 09:08:42,462 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 09:08:42,463 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 57 with the following transitions: [2018-01-21 09:08:42,465 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [8], [9], [13], [18], [22], [28], [31], [32], [46], [47], [48], [53], [54], [55], [61], [65], [71], [75], [77], [80], [169], [173], [178], [182], [190], [194], [196], [197], [198], [202], [206], [275], [280], [284], [290], [291], [297], [301], [303], [304], [305], [366], [368], [369], [370], [371], [375], [377], [378], [379], [380] [2018-01-21 09:08:42,520 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 09:08:42,521 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