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/heap-manipulation/merge_sort_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 08:57:48,250 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 08:57:48,252 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 08:57:48,266 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 08:57:48,266 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 08:57:48,267 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 08:57:48,268 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 08:57:48,269 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 08:57:48,271 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 08:57:48,271 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 08:57:48,272 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 08:57:48,272 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 08:57:48,273 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 08:57:48,273 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 08:57:48,274 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 08:57:48,276 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 08:57:48,279 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 08:57:48,281 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 08:57:48,282 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 08:57:48,283 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 08:57:48,285 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 08:57:48,290 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 08:57:48,291 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 08:57:48,291 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 08:57:48,301 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 08:57:48,301 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 08:57:48,302 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 08:57:48,302 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 08:57:48,303 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 08:57:48,303 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 08:57:48,303 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 08:57:48,303 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 08:57:48,303 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 08:57:48,304 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 08:57:48,304 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 08:57:48,304 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 08:57:48,305 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 08:57:48,305 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 08:57:48,305 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 08:57:48,305 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 08:57:48,305 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 08:57:48,306 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 08:57:48,306 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 08:57:48,306 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 08:57:48,306 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 08:57:48,306 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 08:57:48,307 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 08:57:48,307 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 08:57:48,307 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 08:57:48,307 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 08:57:48,307 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 08:57:48,308 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:57:48,308 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 08:57:48,308 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 08:57:48,308 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 08:57:48,308 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 08:57:48,308 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 08:57:48,309 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 08:57:48,309 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 08:57:48,309 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 08:57:48,309 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 08:57:48,309 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 08:57:48,310 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 08:57:48,310 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 08:57:48,344 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 08:57:48,357 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 08:57:48,361 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 08:57:48,363 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 08:57:48,363 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 08:57:48,364 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort_true-unreach-call_true-valid-memsafety.i [2018-01-21 08:57:48,553 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 08:57:48,557 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 08:57:48,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 08:57:48,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 08:57:48,563 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 08:57:48,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:57:48" (1/1) ... [2018-01-21 08:57:48,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ecd2494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:57:48, skipping insertion in model container [2018-01-21 08:57:48,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:57:48" (1/1) ... [2018-01-21 08:57:48,581 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:57:48,622 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:57:48,738 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:57:48,767 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:57:48,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:57:48 WrapperNode [2018-01-21 08:57:48,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 08:57:48,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 08:57:48,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 08:57:48,783 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 08:57:48,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:57:48" (1/1) ... [2018-01-21 08:57:48,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:57:48" (1/1) ... [2018-01-21 08:57:48,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:57:48" (1/1) ... [2018-01-21 08:57:48,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:57:48" (1/1) ... [2018-01-21 08:57:48,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:57:48" (1/1) ... [2018-01-21 08:57:48,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:57:48" (1/1) ... [2018-01-21 08:57:48,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:57:48" (1/1) ... [2018-01-21 08:57:48,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 08:57:48,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 08:57:48,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 08:57:48,827 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 08:57:48,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:57:48" (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 08:57:48,877 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 08:57:48,877 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 08:57:48,877 INFO L136 BoogieDeclarations]: Found implementation of procedure fail [2018-01-21 08:57:48,878 INFO L136 BoogieDeclarations]: Found implementation of procedure merge_single_node [2018-01-21 08:57:48,878 INFO L136 BoogieDeclarations]: Found implementation of procedure merge_pair [2018-01-21 08:57:48,878 INFO L136 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2018-01-21 08:57:48,878 INFO L136 BoogieDeclarations]: Found implementation of procedure inspect_before [2018-01-21 08:57:48,878 INFO L136 BoogieDeclarations]: Found implementation of procedure inspect_after [2018-01-21 08:57:48,878 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 08:57:48,879 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 08:57:48,879 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 08:57:48,879 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 08:57:48,879 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 08:57:48,879 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 08:57:48,879 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 08:57:48,879 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 08:57:48,880 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 08:57:48,880 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 08:57:48,880 INFO L128 BoogieDeclarations]: Found specification of procedure abort [2018-01-21 08:57:48,880 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 08:57:48,880 INFO L128 BoogieDeclarations]: Found specification of procedure fail [2018-01-21 08:57:48,880 INFO L128 BoogieDeclarations]: Found specification of procedure merge_single_node [2018-01-21 08:57:48,881 INFO L128 BoogieDeclarations]: Found specification of procedure merge_pair [2018-01-21 08:57:48,881 INFO L128 BoogieDeclarations]: Found specification of procedure seq_sort_core [2018-01-21 08:57:48,881 INFO L128 BoogieDeclarations]: Found specification of procedure inspect_before [2018-01-21 08:57:48,881 INFO L128 BoogieDeclarations]: Found specification of procedure inspect_after [2018-01-21 08:57:48,881 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 08:57:48,881 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 08:57:48,881 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 08:57:49,546 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 08:57:49,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:57:49 BoogieIcfgContainer [2018-01-21 08:57:49,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 08:57:49,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 08:57:49,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 08:57:49,551 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 08:57:49,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 08:57:48" (1/3) ... [2018-01-21 08:57:49,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aee3146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:57:49, skipping insertion in model container [2018-01-21 08:57:49,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:57:48" (2/3) ... [2018-01-21 08:57:49,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aee3146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:57:49, skipping insertion in model container [2018-01-21 08:57:49,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:57:49" (3/3) ... [2018-01-21 08:57:49,555 INFO L105 eAbstractionObserver]: Analyzing ICFG merge_sort_true-unreach-call_true-valid-memsafety.i [2018-01-21 08:57:49,564 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 08:57:49,572 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-01-21 08:57:49,619 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:57:49,619 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:57:49,620 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:57:49,620 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:57:49,620 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:57:49,620 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:57:49,620 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:57:49,620 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == failErr0EnsuresViolation======== [2018-01-21 08:57:49,621 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:57:49,641 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2018-01-21 08:57:49,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-21 08:57:49,646 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:57:49,647 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:57:49,647 INFO L371 AbstractCegarLoop]: === Iteration 1 === [failErr0EnsuresViolation]=== [2018-01-21 08:57:49,652 INFO L82 PathProgramCache]: Analyzing trace with hash -101851905, now seen corresponding path program 1 times [2018-01-21 08:57:49,654 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:57:49,696 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:57:49,696 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:57:49,696 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:57:49,696 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:57:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:57:49,756 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:57:49,784 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 08:57:49,785 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:57:49,786 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:57:49,786 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:57:49,789 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:57:49,886 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:57:49,886 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:57:49,889 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 2 states. [2018-01-21 08:57:49,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:57:49,936 INFO L93 Difference]: Finished difference Result 417 states and 571 transitions. [2018-01-21 08:57:49,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:57:49,937 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-01-21 08:57:49,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:57:49,942 INFO L225 Difference]: With dead ends: 417 [2018-01-21 08:57:49,943 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 08:57:49,948 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 08:57:49,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 08:57:49,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 08:57:49,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 08:57:49,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 08:57:49,969 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-01-21 08:57:49,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:57:49,970 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 08:57:49,970 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:57:49,970 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 08:57:49,970 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 08:57:49,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-01-21 08:57:50,107 INFO L404 ceAbstractionStarter]: At program point failENTRY(lines 553 555) the Hoare annotation is: true [2018-01-21 08:57:50,108 INFO L401 ceAbstractionStarter]: For program point failFINAL(lines 553 555) no Hoare annotation was computed. [2018-01-21 08:57:50,108 INFO L401 ceAbstractionStarter]: For program point failErr0EnsuresViolation(lines 553 555) no Hoare annotation was computed. [2018-01-21 08:57:50,108 INFO L401 ceAbstractionStarter]: For program point failEXIT(lines 553 555) no Hoare annotation was computed. [2018-01-21 08:57:50,108 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initErr0EnsuresViolation(lines 1 655) no Hoare annotation was computed. [2018-01-21 08:57:50,108 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 655) no Hoare annotation was computed. [2018-01-21 08:57:50,108 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 655) the Hoare annotation is: true [2018-01-21 08:57:50,108 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 655) no Hoare annotation was computed. [2018-01-21 08:57:50,108 INFO L404 ceAbstractionStarter]: At program point L581(line 581) the Hoare annotation is: true [2018-01-21 08:57:50,108 INFO L404 ceAbstractionStarter]: At program point L581'(line 581) the Hoare annotation is: true [2018-01-21 08:57:50,108 INFO L401 ceAbstractionStarter]: For program point L573'(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,108 INFO L401 ceAbstractionStarter]: For program point merge_pairFINAL(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,109 INFO L401 ceAbstractionStarter]: For program point L577'''''(line 577) no Hoare annotation was computed. [2018-01-21 08:57:50,109 INFO L401 ceAbstractionStarter]: For program point L578''''''''''(line 578) no Hoare annotation was computed. [2018-01-21 08:57:50,109 INFO L401 ceAbstractionStarter]: For program point L573'''''''''''(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,109 INFO L401 ceAbstractionStarter]: For program point L578''''''''''''''(line 578) no Hoare annotation was computed. [2018-01-21 08:57:50,109 INFO L401 ceAbstractionStarter]: For program point L573''(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,109 INFO L404 ceAbstractionStarter]: At program point merge_pairENTRY(lines 573 583) the Hoare annotation is: true [2018-01-21 08:57:50,109 INFO L401 ceAbstractionStarter]: For program point L573''''''''''''''(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,109 INFO L401 ceAbstractionStarter]: For program point L573''''''''''''''''(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,109 INFO L401 ceAbstractionStarter]: For program point L578'(line 578) no Hoare annotation was computed. [2018-01-21 08:57:50,109 INFO L401 ceAbstractionStarter]: For program point L573''''''''''''''''''(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,109 INFO L401 ceAbstractionStarter]: For program point L577''(line 577) no Hoare annotation was computed. [2018-01-21 08:57:50,109 INFO L401 ceAbstractionStarter]: For program point L573''''''(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,109 INFO L401 ceAbstractionStarter]: For program point L573''''''''(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,110 INFO L401 ceAbstractionStarter]: For program point L573(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,110 INFO L401 ceAbstractionStarter]: For program point L573'''''(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,110 INFO L404 ceAbstractionStarter]: At program point L579(line 579) the Hoare annotation is: true [2018-01-21 08:57:50,110 INFO L401 ceAbstractionStarter]: For program point L578(line 578) no Hoare annotation was computed. [2018-01-21 08:57:50,110 INFO L401 ceAbstractionStarter]: For program point L577(lines 577 582) no Hoare annotation was computed. [2018-01-21 08:57:50,110 INFO L401 ceAbstractionStarter]: For program point L578'''''''''(line 578) no Hoare annotation was computed. [2018-01-21 08:57:50,110 INFO L401 ceAbstractionStarter]: For program point L578'''''(line 578) no Hoare annotation was computed. [2018-01-21 08:57:50,110 INFO L401 ceAbstractionStarter]: For program point L577''''(line 577) no Hoare annotation was computed. [2018-01-21 08:57:50,110 INFO L401 ceAbstractionStarter]: For program point L577''''''''(lines 577 582) no Hoare annotation was computed. [2018-01-21 08:57:50,110 INFO L401 ceAbstractionStarter]: For program point L573'''''''''(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,110 INFO L401 ceAbstractionStarter]: For program point L573'''''''''''''''''(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,110 INFO L401 ceAbstractionStarter]: For program point merge_pairErr0EnsuresViolation(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,111 INFO L401 ceAbstractionStarter]: For program point L573'''(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,111 INFO L401 ceAbstractionStarter]: For program point L578''''(line 578) no Hoare annotation was computed. [2018-01-21 08:57:50,111 INFO L401 ceAbstractionStarter]: For program point L573'''''''''''''''(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,111 INFO L401 ceAbstractionStarter]: For program point L573''''''''''(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,111 INFO L401 ceAbstractionStarter]: For program point L578''''''(line 578) no Hoare annotation was computed. [2018-01-21 08:57:50,111 INFO L401 ceAbstractionStarter]: For program point L578'''''''''''(line 578) no Hoare annotation was computed. [2018-01-21 08:57:50,111 INFO L401 ceAbstractionStarter]: For program point L578'''''''(line 578) no Hoare annotation was computed. [2018-01-21 08:57:50,111 INFO L401 ceAbstractionStarter]: For program point L578''(line 578) no Hoare annotation was computed. [2018-01-21 08:57:50,111 INFO L401 ceAbstractionStarter]: For program point L573''''''''''''(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,111 INFO L401 ceAbstractionStarter]: For program point L573'''''''(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,111 INFO L401 ceAbstractionStarter]: For program point merge_pairEXIT(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,112 INFO L401 ceAbstractionStarter]: For program point L578''''''''(line 578) no Hoare annotation was computed. [2018-01-21 08:57:50,112 INFO L401 ceAbstractionStarter]: For program point L578'''''''''''''(line 578) no Hoare annotation was computed. [2018-01-21 08:57:50,112 INFO L401 ceAbstractionStarter]: For program point L577'(line 577) no Hoare annotation was computed. [2018-01-21 08:57:50,112 INFO L401 ceAbstractionStarter]: For program point L573''''(lines 573 583) no Hoare annotation was computed. [2018-01-21 08:57:50,112 INFO L401 ceAbstractionStarter]: For program point L577''''''(line 577) no Hoare annotation was computed. [2018-01-21 08:57:50,112 INFO L401 ceAbstractionStarter]: For program point L571(line 571) no Hoare annotation was computed. [2018-01-21 08:57:50,112 INFO L401 ceAbstractionStarter]: For program point L570(line 570) no Hoare annotation was computed. [2018-01-21 08:57:50,112 INFO L401 ceAbstractionStarter]: For program point L570'(line 570) no Hoare annotation was computed. [2018-01-21 08:57:50,112 INFO L401 ceAbstractionStarter]: For program point merge_single_nodeFINAL(lines 564 572) no Hoare annotation was computed. [2018-01-21 08:57:50,112 INFO L401 ceAbstractionStarter]: For program point merge_single_nodeErr0EnsuresViolation(lines 564 572) no Hoare annotation was computed. [2018-01-21 08:57:50,112 INFO L401 ceAbstractionStarter]: For program point L568(line 568) no Hoare annotation was computed. [2018-01-21 08:57:50,112 INFO L401 ceAbstractionStarter]: For program point L567(line 567) no Hoare annotation was computed. [2018-01-21 08:57:50,112 INFO L401 ceAbstractionStarter]: For program point L569(line 569) no Hoare annotation was computed. [2018-01-21 08:57:50,113 INFO L401 ceAbstractionStarter]: For program point merge_single_nodeEXIT(lines 564 572) no Hoare annotation was computed. [2018-01-21 08:57:50,113 INFO L404 ceAbstractionStarter]: At program point merge_single_nodeENTRY(lines 564 572) the Hoare annotation is: true [2018-01-21 08:57:50,113 INFO L401 ceAbstractionStarter]: For program point L567'(line 567) no Hoare annotation was computed. [2018-01-21 08:57:50,113 INFO L401 ceAbstractionStarter]: For program point L568'(line 568) no Hoare annotation was computed. [2018-01-21 08:57:50,113 INFO L401 ceAbstractionStarter]: For program point L569'(line 569) no Hoare annotation was computed. [2018-01-21 08:57:50,113 INFO L401 ceAbstractionStarter]: For program point L568''(line 568) no Hoare annotation was computed. [2018-01-21 08:57:50,113 INFO L401 ceAbstractionStarter]: For program point L595'(line 595) no Hoare annotation was computed. [2018-01-21 08:57:50,113 INFO L401 ceAbstractionStarter]: For program point L594'''(line 594) no Hoare annotation was computed. [2018-01-21 08:57:50,113 INFO L401 ceAbstractionStarter]: For program point L597'(line 597) no Hoare annotation was computed. [2018-01-21 08:57:50,113 INFO L401 ceAbstractionStarter]: For program point L589(lines 589 593) no Hoare annotation was computed. [2018-01-21 08:57:50,113 INFO L401 ceAbstractionStarter]: For program point L588(line 588) no Hoare annotation was computed. [2018-01-21 08:57:50,113 INFO L401 ceAbstractionStarter]: For program point seq_sort_coreErr0EnsuresViolation(lines 584 601) no Hoare annotation was computed. [2018-01-21 08:57:50,114 INFO L401 ceAbstractionStarter]: For program point L587(lines 587 599) no Hoare annotation was computed. [2018-01-21 08:57:50,114 INFO L404 ceAbstractionStarter]: At program point L594''(line 594) the Hoare annotation is: true [2018-01-21 08:57:50,114 INFO L401 ceAbstractionStarter]: For program point seq_sort_coreEXIT(lines 584 601) no Hoare annotation was computed. [2018-01-21 08:57:50,114 INFO L401 ceAbstractionStarter]: For program point seq_sort_coreFINAL(lines 584 601) no Hoare annotation was computed. [2018-01-21 08:57:50,114 INFO L404 ceAbstractionStarter]: At program point L598'(line 598) the Hoare annotation is: true [2018-01-21 08:57:50,114 INFO L401 ceAbstractionStarter]: For program point L588'(line 588) no Hoare annotation was computed. [2018-01-21 08:57:50,114 INFO L401 ceAbstractionStarter]: For program point L590'(line 590) no Hoare annotation was computed. [2018-01-21 08:57:50,114 INFO L401 ceAbstractionStarter]: For program point L590(line 590) no Hoare annotation was computed. [2018-01-21 08:57:50,114 INFO L401 ceAbstractionStarter]: For program point L594'(line 594) no Hoare annotation was computed. [2018-01-21 08:57:50,114 INFO L401 ceAbstractionStarter]: For program point L597(line 597) no Hoare annotation was computed. [2018-01-21 08:57:50,114 INFO L401 ceAbstractionStarter]: For program point L595(line 595) no Hoare annotation was computed. [2018-01-21 08:57:50,114 INFO L404 ceAbstractionStarter]: At program point seq_sort_coreENTRY(lines 584 601) the Hoare annotation is: true [2018-01-21 08:57:50,114 INFO L401 ceAbstractionStarter]: For program point L594(line 594) no Hoare annotation was computed. [2018-01-21 08:57:50,115 INFO L401 ceAbstractionStarter]: For program point L598(line 598) no Hoare annotation was computed. [2018-01-21 08:57:50,115 INFO L401 ceAbstractionStarter]: For program point L587''(lines 587 599) no Hoare annotation was computed. [2018-01-21 08:57:50,115 INFO L401 ceAbstractionStarter]: For program point L609'''''''(line 609) no Hoare annotation was computed. [2018-01-21 08:57:50,115 INFO L404 ceAbstractionStarter]: At program point inspect_beforeENTRY(lines 602 615) the Hoare annotation is: true [2018-01-21 08:57:50,115 INFO L404 ceAbstractionStarter]: At program point L611'(line 611) the Hoare annotation is: true [2018-01-21 08:57:50,115 INFO L401 ceAbstractionStarter]: For program point L607'(line 607) no Hoare annotation was computed. [2018-01-21 08:57:50,115 INFO L401 ceAbstractionStarter]: For program point L609'''''(line 609) no Hoare annotation was computed. [2018-01-21 08:57:50,115 INFO L401 ceAbstractionStarter]: For program point L613''''(line 613) no Hoare annotation was computed. [2018-01-21 08:57:50,115 INFO L401 ceAbstractionStarter]: For program point L612(line 612) no Hoare annotation was computed. [2018-01-21 08:57:50,115 INFO L401 ceAbstractionStarter]: For program point L611(line 611) no Hoare annotation was computed. [2018-01-21 08:57:50,115 INFO L401 ceAbstractionStarter]: For program point L611'''''(line 611) no Hoare annotation was computed. [2018-01-21 08:57:50,115 INFO L404 ceAbstractionStarter]: At program point L613''(line 613) the Hoare annotation is: true [2018-01-21 08:57:50,116 INFO L404 ceAbstractionStarter]: At program point L606'''''(line 606) the Hoare annotation is: true [2018-01-21 08:57:50,116 INFO L404 ceAbstractionStarter]: At program point L607''(line 607) the Hoare annotation is: true [2018-01-21 08:57:50,116 INFO L401 ceAbstractionStarter]: For program point L614(line 614) no Hoare annotation was computed. [2018-01-21 08:57:50,116 INFO L401 ceAbstractionStarter]: For program point L613(line 613) no Hoare annotation was computed. [2018-01-21 08:57:50,116 INFO L401 ceAbstractionStarter]: For program point L612'(line 612) no Hoare annotation was computed. [2018-01-21 08:57:50,116 INFO L401 ceAbstractionStarter]: For program point L608'(line 608) no Hoare annotation was computed. [2018-01-21 08:57:50,116 INFO L404 ceAbstractionStarter]: At program point L609'''(line 609) the Hoare annotation is: true [2018-01-21 08:57:50,116 INFO L401 ceAbstractionStarter]: For program point L605'(line 605) no Hoare annotation was computed. [2018-01-21 08:57:50,116 INFO L404 ceAbstractionStarter]: At program point L614'''(line 614) the Hoare annotation is: true [2018-01-21 08:57:50,116 INFO L401 ceAbstractionStarter]: For program point L613''''''(line 613) no Hoare annotation was computed. [2018-01-21 08:57:50,116 INFO L401 ceAbstractionStarter]: For program point L607''''(line 607) no Hoare annotation was computed. [2018-01-21 08:57:50,116 INFO L401 ceAbstractionStarter]: For program point L607''''''(line 607) no Hoare annotation was computed. [2018-01-21 08:57:50,117 INFO L401 ceAbstractionStarter]: For program point L605''''(line 605) no Hoare annotation was computed. [2018-01-21 08:57:50,117 INFO L401 ceAbstractionStarter]: For program point L606'''(line 606) no Hoare annotation was computed. [2018-01-21 08:57:50,117 INFO L401 ceAbstractionStarter]: For program point L614''(line 614) no Hoare annotation was computed. [2018-01-21 08:57:50,117 INFO L401 ceAbstractionStarter]: For program point L612''''''(line 612) no Hoare annotation was computed. [2018-01-21 08:57:50,117 INFO L401 ceAbstractionStarter]: For program point L605'''''(lines 605 610) no Hoare annotation was computed. [2018-01-21 08:57:50,117 INFO L404 ceAbstractionStarter]: At program point L606'(line 606) the Hoare annotation is: true [2018-01-21 08:57:50,117 INFO L401 ceAbstractionStarter]: For program point inspect_beforeErr0EnsuresViolation(lines 602 615) no Hoare annotation was computed. [2018-01-21 08:57:50,117 INFO L401 ceAbstractionStarter]: For program point L608''''''(line 608) no Hoare annotation was computed. [2018-01-21 08:57:50,118 INFO L401 ceAbstractionStarter]: For program point L612''''(line 612) no Hoare annotation was computed. [2018-01-21 08:57:50,118 INFO L401 ceAbstractionStarter]: For program point L614''''''''(line 614) no Hoare annotation was computed. [2018-01-21 08:57:50,118 INFO L401 ceAbstractionStarter]: For program point L604'''(line 604) no Hoare annotation was computed. [2018-01-21 08:57:50,118 INFO L401 ceAbstractionStarter]: For program point L609''(line 609) no Hoare annotation was computed. [2018-01-21 08:57:50,118 INFO L401 ceAbstractionStarter]: For program point L614'''''(line 614) no Hoare annotation was computed. [2018-01-21 08:57:50,118 INFO L404 ceAbstractionStarter]: At program point L604'(line 604) the Hoare annotation is: true [2018-01-21 08:57:50,118 INFO L401 ceAbstractionStarter]: For program point L611'''(line 611) no Hoare annotation was computed. [2018-01-21 08:57:50,118 INFO L401 ceAbstractionStarter]: For program point L605'''(lines 605 610) no Hoare annotation was computed. [2018-01-21 08:57:50,119 INFO L401 ceAbstractionStarter]: For program point L608''''(line 608) no Hoare annotation was computed. [2018-01-21 08:57:50,119 INFO L401 ceAbstractionStarter]: For program point L614'''''''(line 614) no Hoare annotation was computed. [2018-01-21 08:57:50,119 INFO L401 ceAbstractionStarter]: For program point L605(line 605) no Hoare annotation was computed. [2018-01-21 08:57:50,119 INFO L401 ceAbstractionStarter]: For program point L604(line 604) no Hoare annotation was computed. [2018-01-21 08:57:50,119 INFO L401 ceAbstractionStarter]: For program point L609(line 609) no Hoare annotation was computed. [2018-01-21 08:57:50,119 INFO L401 ceAbstractionStarter]: For program point L608(line 608) no Hoare annotation was computed. [2018-01-21 08:57:50,119 INFO L401 ceAbstractionStarter]: For program point L607(line 607) no Hoare annotation was computed. [2018-01-21 08:57:50,119 INFO L401 ceAbstractionStarter]: For program point L606(line 606) no Hoare annotation was computed. [2018-01-21 08:57:50,119 INFO L401 ceAbstractionStarter]: For program point L613'(line 613) no Hoare annotation was computed. [2018-01-21 08:57:50,120 INFO L404 ceAbstractionStarter]: At program point L604'''''(line 604) the Hoare annotation is: true [2018-01-21 08:57:50,120 INFO L401 ceAbstractionStarter]: For program point L609'(line 609) no Hoare annotation was computed. [2018-01-21 08:57:50,120 INFO L401 ceAbstractionStarter]: For program point inspect_beforeEXIT(lines 602 615) no Hoare annotation was computed. [2018-01-21 08:57:50,120 INFO L404 ceAbstractionStarter]: At program point L612''(line 612) the Hoare annotation is: true [2018-01-21 08:57:50,120 INFO L404 ceAbstractionStarter]: At program point L608''(line 608) the Hoare annotation is: true [2018-01-21 08:57:50,120 INFO L401 ceAbstractionStarter]: For program point L614'(line 614) no Hoare annotation was computed. [2018-01-21 08:57:50,120 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 655) the Hoare annotation is: true [2018-01-21 08:57:50,121 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 655) no Hoare annotation was computed. [2018-01-21 08:57:50,121 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 655) the Hoare annotation is: true [2018-01-21 08:57:50,121 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startErr0EnsuresViolation(lines 1 655) no Hoare annotation was computed. [2018-01-21 08:57:50,121 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 655) no Hoare annotation was computed. [2018-01-21 08:57:50,121 INFO L401 ceAbstractionStarter]: For program point L650'(line 650) no Hoare annotation was computed. [2018-01-21 08:57:50,121 INFO L401 ceAbstractionStarter]: For program point L649'''(lines 649 653) no Hoare annotation was computed. [2018-01-21 08:57:50,121 INFO L401 ceAbstractionStarter]: For program point L629(line 629) no Hoare annotation was computed. [2018-01-21 08:57:50,121 INFO L401 ceAbstractionStarter]: For program point L628(lines 628 640) no Hoare annotation was computed. [2018-01-21 08:57:50,122 INFO L401 ceAbstractionStarter]: For program point L628''''(lines 628 640) no Hoare annotation was computed. [2018-01-21 08:57:50,122 INFO L401 ceAbstractionStarter]: For program point L651(line 651) no Hoare annotation was computed. [2018-01-21 08:57:50,122 INFO L401 ceAbstractionStarter]: For program point L630''(lines 630 631) no Hoare annotation was computed. [2018-01-21 08:57:50,122 INFO L401 ceAbstractionStarter]: For program point L650(line 650) no Hoare annotation was computed. [2018-01-21 08:57:50,122 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 625 655) no Hoare annotation was computed. [2018-01-21 08:57:50,122 INFO L401 ceAbstractionStarter]: For program point L651'(line 651) no Hoare annotation was computed. [2018-01-21 08:57:50,122 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 625 655) no Hoare annotation was computed. [2018-01-21 08:57:50,122 INFO L404 ceAbstractionStarter]: At program point mainENTRY(lines 625 655) the Hoare annotation is: true [2018-01-21 08:57:50,122 INFO L401 ceAbstractionStarter]: For program point L644'(line 644) no Hoare annotation was computed. [2018-01-21 08:57:50,123 INFO L404 ceAbstractionStarter]: At program point L644''''(lines 644 645) the Hoare annotation is: true [2018-01-21 08:57:50,123 INFO L401 ceAbstractionStarter]: For program point L628'(lines 628 640) no Hoare annotation was computed. [2018-01-21 08:57:50,123 INFO L404 ceAbstractionStarter]: At program point L645(line 645) the Hoare annotation is: true [2018-01-21 08:57:50,123 INFO L401 ceAbstractionStarter]: For program point L644(lines 644 645) no Hoare annotation was computed. [2018-01-21 08:57:50,123 INFO L404 ceAbstractionStarter]: At program point L643(line 643) the Hoare annotation is: true [2018-01-21 08:57:50,123 INFO L401 ceAbstractionStarter]: For program point L649(lines 649 653) no Hoare annotation was computed. [2018-01-21 08:57:50,123 INFO L401 ceAbstractionStarter]: For program point L648(line 648) no Hoare annotation was computed. [2018-01-21 08:57:50,123 INFO L404 ceAbstractionStarter]: At program point L628'''(lines 628 640) the Hoare annotation is: true [2018-01-21 08:57:50,124 INFO L401 ceAbstractionStarter]: For program point L647(line 647) no Hoare annotation was computed. [2018-01-21 08:57:50,124 INFO L404 ceAbstractionStarter]: At program point L649''(lines 649 653) the Hoare annotation is: true [2018-01-21 08:57:50,124 INFO L401 ceAbstractionStarter]: For program point L646(line 646) no Hoare annotation was computed. [2018-01-21 08:57:50,124 INFO L401 ceAbstractionStarter]: For program point L645'(line 645) no Hoare annotation was computed. [2018-01-21 08:57:50,124 INFO L401 ceAbstractionStarter]: For program point L633'(line 633) no Hoare annotation was computed. [2018-01-21 08:57:50,124 INFO L401 ceAbstractionStarter]: For program point L629'(line 629) no Hoare annotation was computed. [2018-01-21 08:57:50,124 INFO L401 ceAbstractionStarter]: For program point mainErr0EnsuresViolation(lines 625 655) no Hoare annotation was computed. [2018-01-21 08:57:50,124 INFO L401 ceAbstractionStarter]: For program point L630(lines 630 631) no Hoare annotation was computed. [2018-01-21 08:57:50,125 INFO L401 ceAbstractionStarter]: For program point L634(line 634) no Hoare annotation was computed. [2018-01-21 08:57:50,125 INFO L401 ceAbstractionStarter]: For program point L633(line 633) no Hoare annotation was computed. [2018-01-21 08:57:50,125 INFO L404 ceAbstractionStarter]: At program point L644'''(lines 644 645) the Hoare annotation is: true [2018-01-21 08:57:50,125 INFO L401 ceAbstractionStarter]: For program point L632(line 632) no Hoare annotation was computed. [2018-01-21 08:57:50,125 INFO L401 ceAbstractionStarter]: For program point L638(line 638) no Hoare annotation was computed. [2018-01-21 08:57:50,125 INFO L401 ceAbstractionStarter]: For program point L635''(lines 635 636) no Hoare annotation was computed. [2018-01-21 08:57:50,125 INFO L401 ceAbstractionStarter]: For program point L637(line 637) no Hoare annotation was computed. [2018-01-21 08:57:50,125 INFO L401 ceAbstractionStarter]: For program point L635(lines 635 636) no Hoare annotation was computed. [2018-01-21 08:57:50,126 INFO L401 ceAbstractionStarter]: For program point L634'(line 634) no Hoare annotation was computed. [2018-01-21 08:57:50,126 INFO L401 ceAbstractionStarter]: For program point L623(line 623) no Hoare annotation was computed. [2018-01-21 08:57:50,126 INFO L401 ceAbstractionStarter]: For program point L623'''''''(line 623) no Hoare annotation was computed. [2018-01-21 08:57:50,126 INFO L401 ceAbstractionStarter]: For program point L622(line 622) no Hoare annotation was computed. [2018-01-21 08:57:50,126 INFO L401 ceAbstractionStarter]: For program point L622'''(line 622) no Hoare annotation was computed. [2018-01-21 08:57:50,126 INFO L401 ceAbstractionStarter]: For program point L620(line 620) no Hoare annotation was computed. [2018-01-21 08:57:50,126 INFO L404 ceAbstractionStarter]: At program point L623''(line 623) the Hoare annotation is: true [2018-01-21 08:57:50,126 INFO L404 ceAbstractionStarter]: At program point L622'''''''(line 622) the Hoare annotation is: true [2018-01-21 08:57:50,127 INFO L401 ceAbstractionStarter]: For program point L620'''''''(line 620) no Hoare annotation was computed. [2018-01-21 08:57:50,127 INFO L401 ceAbstractionStarter]: For program point L623'(line 623) no Hoare annotation was computed. [2018-01-21 08:57:50,127 INFO L401 ceAbstractionStarter]: For program point L620''''(line 620) no Hoare annotation was computed. [2018-01-21 08:57:50,127 INFO L401 ceAbstractionStarter]: For program point L619'(line 619) no Hoare annotation was computed. [2018-01-21 08:57:50,127 INFO L401 ceAbstractionStarter]: For program point L622'''''(line 622) no Hoare annotation was computed. [2018-01-21 08:57:50,127 INFO L401 ceAbstractionStarter]: For program point L619(line 619) no Hoare annotation was computed. [2018-01-21 08:57:50,127 INFO L401 ceAbstractionStarter]: For program point L618(line 618) no Hoare annotation was computed. [2018-01-21 08:57:50,127 INFO L404 ceAbstractionStarter]: At program point L619''(line 619) the Hoare annotation is: true [2018-01-21 08:57:50,127 INFO L401 ceAbstractionStarter]: For program point L620'(line 620) no Hoare annotation was computed. [2018-01-21 08:57:50,128 INFO L401 ceAbstractionStarter]: For program point L622''''''(line 622) no Hoare annotation was computed. [2018-01-21 08:57:50,128 INFO L404 ceAbstractionStarter]: At program point L620''(line 620) the Hoare annotation is: true [2018-01-21 08:57:50,128 INFO L401 ceAbstractionStarter]: For program point L622''(line 622) no Hoare annotation was computed. [2018-01-21 08:57:50,128 INFO L404 ceAbstractionStarter]: At program point inspect_afterENTRY(lines 616 624) the Hoare annotation is: true [2018-01-21 08:57:50,128 INFO L401 ceAbstractionStarter]: For program point L623''''''(line 623) no Hoare annotation was computed. [2018-01-21 08:57:50,128 INFO L401 ceAbstractionStarter]: For program point inspect_afterErr0EnsuresViolation(lines 616 624) no Hoare annotation was computed. [2018-01-21 08:57:50,128 INFO L401 ceAbstractionStarter]: For program point L618'''(line 618) no Hoare annotation was computed. [2018-01-21 08:57:50,128 INFO L404 ceAbstractionStarter]: At program point L618'''''(line 618) the Hoare annotation is: true [2018-01-21 08:57:50,129 INFO L401 ceAbstractionStarter]: For program point L619''''''(line 619) no Hoare annotation was computed. [2018-01-21 08:57:50,129 INFO L401 ceAbstractionStarter]: For program point L619''''(line 619) no Hoare annotation was computed. [2018-01-21 08:57:50,129 INFO L401 ceAbstractionStarter]: For program point L620''''''(line 620) no Hoare annotation was computed. [2018-01-21 08:57:50,129 INFO L401 ceAbstractionStarter]: For program point L622'(line 622) no Hoare annotation was computed. [2018-01-21 08:57:50,129 INFO L401 ceAbstractionStarter]: For program point L623''''(line 623) no Hoare annotation was computed. [2018-01-21 08:57:50,129 INFO L401 ceAbstractionStarter]: For program point inspect_afterEXIT(lines 616 624) no Hoare annotation was computed. [2018-01-21 08:57:50,129 INFO L404 ceAbstractionStarter]: At program point L618'(line 618) the Hoare annotation is: true [2018-01-21 08:57:50,135 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:57:50,135 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:57:50,135 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:57:50,135 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:57:50,135 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:57:50,136 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:57:50,136 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:57:50,136 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 08:57:50,136 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:57:50,141 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2018-01-21 08:57:50,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 08:57:50,141 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:57:50,141 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 08:57:50,141 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 08:57:50,142 INFO L82 PathProgramCache]: Analyzing trace with hash 563166, now seen corresponding path program 1 times [2018-01-21 08:57:50,142 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:57:50,143 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:57:50,143 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:57:50,143 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:57:50,144 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:57:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:57:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:57:50,174 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:57:50,178 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:57:50,183 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:57:50,183 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:57:50,183 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:57:50,184 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:57:50,184 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:57:50,184 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:57:50,184 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:57:50,184 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == merge_pairErr0EnsuresViolation======== [2018-01-21 08:57:50,184 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:57:50,187 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2018-01-21 08:57:50,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-01-21 08:57:50,191 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:57:50,191 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:57:50,191 INFO L371 AbstractCegarLoop]: === Iteration 1 === [merge_pairErr0EnsuresViolation]=== [2018-01-21 08:57:50,191 INFO L82 PathProgramCache]: Analyzing trace with hash -2032860850, now seen corresponding path program 1 times [2018-01-21 08:57:50,191 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:57:50,192 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:57:50,192 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:57:50,192 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:57:50,192 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:57:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:57:50,207 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:57:50,232 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 08:57:50,232 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:57:50,233 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:57:50,233 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:57:50,233 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:57:50,234 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:57:50,234 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:57:50,234 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 2 states. [2018-01-21 08:57:50,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:57:50,256 INFO L93 Difference]: Finished difference Result 417 states and 571 transitions. [2018-01-21 08:57:50,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:57:50,256 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 53 [2018-01-21 08:57:50,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:57:50,262 INFO L225 Difference]: With dead ends: 417 [2018-01-21 08:57:50,263 INFO L226 Difference]: Without dead ends: 150 [2018-01-21 08:57:50,265 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 08:57:50,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-01-21 08:57:50,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-01-21 08:57:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-01-21 08:57:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 160 transitions. [2018-01-21 08:57:50,288 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 160 transitions. Word has length 53 [2018-01-21 08:57:50,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:57:50,289 INFO L432 AbstractCegarLoop]: Abstraction has 150 states and 160 transitions. [2018-01-21 08:57:50,289 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:57:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 160 transitions. [2018-01-21 08:57:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-01-21 08:57:50,291 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:57:50,291 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:57:50,291 INFO L371 AbstractCegarLoop]: === Iteration 2 === [merge_pairErr0EnsuresViolation]=== [2018-01-21 08:57:50,291 INFO L82 PathProgramCache]: Analyzing trace with hash -493560614, now seen corresponding path program 1 times [2018-01-21 08:57:50,291 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:57:50,292 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:57:50,292 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:57:50,292 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:57:50,292 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:57:50,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:57:50,310 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:57:50,367 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 08:57:50,367 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:57:50,367 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 08:57:50,367 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:57:50,369 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 08:57:50,369 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 08:57:50,369 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 08:57:50,369 INFO L87 Difference]: Start difference. First operand 150 states and 160 transitions. Second operand 3 states. [2018-01-21 08:57:50,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:57:50,431 INFO L93 Difference]: Finished difference Result 294 states and 314 transitions. [2018-01-21 08:57:50,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 08:57:50,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2018-01-21 08:57:50,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:57:50,434 INFO L225 Difference]: With dead ends: 294 [2018-01-21 08:57:50,434 INFO L226 Difference]: Without dead ends: 166 [2018-01-21 08:57:50,434 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 08:57:50,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-01-21 08:57:50,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 153. [2018-01-21 08:57:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-01-21 08:57:50,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 163 transitions. [2018-01-21 08:57:50,444 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 163 transitions. Word has length 75 [2018-01-21 08:57:50,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:57:50,444 INFO L432 AbstractCegarLoop]: Abstraction has 153 states and 163 transitions. [2018-01-21 08:57:50,444 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 08:57:50,444 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 163 transitions. [2018-01-21 08:57:50,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-01-21 08:57:50,447 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:57:50,447 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:57:50,447 INFO L371 AbstractCegarLoop]: === Iteration 3 === [merge_pairErr0EnsuresViolation]=== [2018-01-21 08:57:50,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1476607212, now seen corresponding path program 1 times [2018-01-21 08:57:50,447 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:57:50,448 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:57:50,448 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:57:50,448 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:57:50,448 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:57:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:57:50,508 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:57:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-21 08:57:50,587 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:57:50,587 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 08:57:50,587 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:57:50,588 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 08:57:50,588 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 08:57:50,588 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 08:57:50,589 INFO L87 Difference]: Start difference. First operand 153 states and 163 transitions. Second operand 3 states. [2018-01-21 08:57:50,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:57:50,619 INFO L93 Difference]: Finished difference Result 237 states and 258 transitions. [2018-01-21 08:57:50,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 08:57:50,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2018-01-21 08:57:50,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:57:50,622 INFO L225 Difference]: With dead ends: 237 [2018-01-21 08:57:50,622 INFO L226 Difference]: Without dead ends: 154 [2018-01-21 08:57:50,623 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 08:57:50,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-01-21 08:57:50,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-01-21 08:57:50,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-01-21 08:57:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2018-01-21 08:57:50,635 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 91 [2018-01-21 08:57:50,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:57:50,636 INFO L432 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2018-01-21 08:57:50,636 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 08:57:50,636 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2018-01-21 08:57:50,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-01-21 08:57:50,638 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:57:50,639 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:57:50,639 INFO L371 AbstractCegarLoop]: === Iteration 4 === [merge_pairErr0EnsuresViolation]=== [2018-01-21 08:57:50,639 INFO L82 PathProgramCache]: Analyzing trace with hash 754057391, now seen corresponding path program 1 times [2018-01-21 08:57:50,639 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:57:50,640 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:57:50,640 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:57:50,640 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:57:50,640 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:57:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:57:50,690 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:57:51,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:57:51,301 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:57:51,301 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2018-01-21 08:57:51,301 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:57:51,302 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-21 08:57:51,302 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-21 08:57:51,302 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2018-01-21 08:57:51,302 INFO L87 Difference]: Start difference. First operand 154 states and 164 transitions. Second operand 17 states. [2018-01-21 08:57:52,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:57:52,137 INFO L93 Difference]: Finished difference Result 370 states and 407 transitions. [2018-01-21 08:57:52,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-21 08:57:52,137 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 93 [2018-01-21 08:57:52,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:57:52,143 INFO L225 Difference]: With dead ends: 370 [2018-01-21 08:57:52,143 INFO L226 Difference]: Without dead ends: 286 [2018-01-21 08:57:52,145 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2018-01-21 08:57:52,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-01-21 08:57:52,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 221. [2018-01-21 08:57:52,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-01-21 08:57:52,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 242 transitions. [2018-01-21 08:57:52,167 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 242 transitions. Word has length 93 [2018-01-21 08:57:52,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:57:52,168 INFO L432 AbstractCegarLoop]: Abstraction has 221 states and 242 transitions. [2018-01-21 08:57:52,168 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-21 08:57:52,168 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 242 transitions. [2018-01-21 08:57:52,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-01-21 08:57:52,170 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:57:52,170 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:57:52,170 INFO L371 AbstractCegarLoop]: === Iteration 5 === [merge_pairErr0EnsuresViolation]=== [2018-01-21 08:57:52,171 INFO L82 PathProgramCache]: Analyzing trace with hash -514708738, now seen corresponding path program 1 times [2018-01-21 08:57:52,171 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:57:52,172 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:57:52,172 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:57:52,172 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:57:52,172 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:57:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:57:52,202 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:57:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:57:52,318 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:57:52,318 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-21 08:57:52,319 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:57:52,319 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 08:57:52,320 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 08:57:52,320 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-21 08:57:52,320 INFO L87 Difference]: Start difference. First operand 221 states and 242 transitions. Second operand 7 states. [2018-01-21 08:57:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:57:52,510 INFO L93 Difference]: Finished difference Result 343 states and 375 transitions. [2018-01-21 08:57:52,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-21 08:57:52,511 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 104 [2018-01-21 08:57:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:57:52,513 INFO L225 Difference]: With dead ends: 343 [2018-01-21 08:57:52,513 INFO L226 Difference]: Without dead ends: 256 [2018-01-21 08:57:52,514 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-01-21 08:57:52,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-01-21 08:57:52,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 231. [2018-01-21 08:57:52,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-01-21 08:57:52,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 253 transitions. [2018-01-21 08:57:52,531 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 253 transitions. Word has length 104 [2018-01-21 08:57:52,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:57:52,531 INFO L432 AbstractCegarLoop]: Abstraction has 231 states and 253 transitions. [2018-01-21 08:57:52,532 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 08:57:52,532 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 253 transitions. [2018-01-21 08:57:52,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-01-21 08:57:52,533 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:57:52,533 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:57:52,534 INFO L371 AbstractCegarLoop]: === Iteration 6 === [merge_pairErr0EnsuresViolation]=== [2018-01-21 08:57:52,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1958389758, now seen corresponding path program 1 times [2018-01-21 08:57:52,534 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:57:52,535 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:57:52,535 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:57:52,535 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:57:52,535 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:57:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:57:52,573 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:57:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:57:53,501 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:57:53,501 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 08:57:53,502 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 110 with the following transitions: [2018-01-21 08:57:53,504 INFO L201 CegarAbsIntRunner]: [13], [17], [23], [24], [25], [28], [29], [30], [32], [33], [34], [45], [46], [48], [52], [58], [62], [70], [71], [74], [161], [167], [171], [179], [180], [186], [190], [198], [199], [205], [209], [217], [218], [219], [225], [229], [235], [237], [241], [243], [246], [248], [249], [250], [255], [257], [258], [259], [260], [261], [262], [267], [269], [270], [271], [278], [283], [285], [290], [292], [421], [422], [424], [425], [426], [427], [428], [429], [430], [431], [432], [433], [434], [435], [436], [437], [441], [443], [444], [449], [450], [451], [455], [491], [492], [493], [494], [495], [496], [498], [503], [523], [524], [525], [526], [541], [542], [543] [2018-01-21 08:57:53,552 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 08:57:53,552 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