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_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/reducercommutativity/avg60_true-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d63d1fb [2018-01-27 23:02:45,429 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-27 23:02:45,431 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-27 23:02:45,453 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-27 23:02:45,453 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-27 23:02:45,454 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-27 23:02:45,455 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-27 23:02:45,458 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-27 23:02:45,460 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-27 23:02:45,461 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-27 23:02:45,463 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-27 23:02:45,464 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-27 23:02:45,465 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-27 23:02:45,466 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-27 23:02:45,467 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-27 23:02:45,477 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-27 23:02:45,479 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-27 23:02:45,481 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-27 23:02:45,484 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-27 23:02:45,485 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-27 23:02:45,489 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-27 23:02:45,498 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-27 23:02:45,499 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-27 23:02:45,499 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-27 23:02:45,511 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-27 23:02:45,511 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-27 23:02:45,512 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-27 23:02:45,512 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-27 23:02:45,512 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-27 23:02:45,512 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-27 23:02:45,513 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-27 23:02:45,513 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-27 23:02:45,513 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-27 23:02:45,513 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-27 23:02:45,514 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-27 23:02:45,514 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-27 23:02:45,514 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-27 23:02:45,514 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-27 23:02:45,514 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-27 23:02:45,514 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-27 23:02:45,515 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-27 23:02:45,515 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-27 23:02:45,515 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-27 23:02:45,515 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-27 23:02:45,515 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-27 23:02:45,515 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-27 23:02:45,516 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-27 23:02:45,516 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-27 23:02:45,516 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-27 23:02:45,516 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-27 23:02:45,516 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-27 23:02:45,516 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-27 23:02:45,517 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-27 23:02:45,517 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-27 23:02:45,517 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-27 23:02:45,517 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-27 23:02:45,517 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-27 23:02:45,517 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-27 23:02:45,518 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-27 23:02:45,518 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-27 23:02:45,519 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-27 23:02:45,571 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-27 23:02:45,584 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-27 23:02:45,588 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-27 23:02:45,592 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-27 23:02:45,592 INFO L276 PluginConnector]: CDTParser initialized [2018-01-27 23:02:45,593 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg60_true-unreach-call.i [2018-01-27 23:02:45,715 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-27 23:02:45,722 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-27 23:02:45,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-27 23:02:45,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-27 23:02:45,730 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-27 23:02:45,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:02:45" (1/1) ... [2018-01-27 23:02:45,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d17e50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:45, skipping insertion in model container [2018-01-27 23:02:45,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:02:45" (1/1) ... [2018-01-27 23:02:45,754 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-27 23:02:45,775 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-27 23:02:45,952 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-27 23:02:45,981 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-27 23:02:45,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:45 WrapperNode [2018-01-27 23:02:45,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-27 23:02:45,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-27 23:02:45,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-27 23:02:45,992 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-27 23:02:46,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:45" (1/1) ... [2018-01-27 23:02:46,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:45" (1/1) ... [2018-01-27 23:02:46,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:45" (1/1) ... [2018-01-27 23:02:46,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:45" (1/1) ... [2018-01-27 23:02:46,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:45" (1/1) ... [2018-01-27 23:02:46,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:45" (1/1) ... [2018-01-27 23:02:46,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:45" (1/1) ... [2018-01-27 23:02:46,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-27 23:02:46,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-27 23:02:46,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-27 23:02:46,053 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-27 23:02:46,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:45" (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 [2018-01-27 23:02:46,130 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-27 23:02:46,130 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-27 23:02:46,130 INFO L136 BoogieDeclarations]: Found implementation of procedure avg [2018-01-27 23:02:46,130 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-27 23:02:46,130 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-27 23:02:46,131 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-27 23:02:46,131 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-27 23:02:46,131 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-27 23:02:46,134 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-27 23:02:46,134 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-27 23:02:46,134 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-27 23:02:46,134 INFO L128 BoogieDeclarations]: Found specification of procedure avg [2018-01-27 23:02:46,134 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-27 23:02:46,134 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-27 23:02:46,135 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-27 23:02:46,635 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-27 23:02:46,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:02:46 BoogieIcfgContainer [2018-01-27 23:02:46,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-27 23:02:46,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-27 23:02:46,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-27 23:02:46,640 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-27 23:02:46,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 11:02:45" (1/3) ... [2018-01-27 23:02:46,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d3a66ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:02:46, skipping insertion in model container [2018-01-27 23:02:46,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:45" (2/3) ... [2018-01-27 23:02:46,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d3a66ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:02:46, skipping insertion in model container [2018-01-27 23:02:46,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:02:46" (3/3) ... [2018-01-27 23:02:46,643 INFO L105 eAbstractionObserver]: Analyzing ICFG avg60_true-unreach-call.i [2018-01-27 23:02:46,654 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-27 23:02:46,664 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-27 23:02:46,700 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-27 23:02:46,701 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-27 23:02:46,701 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-27 23:02:46,701 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-27 23:02:46,701 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-27 23:02:46,701 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-27 23:02:46,701 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-27 23:02:46,702 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-27 23:02:46,702 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-27 23:02:46,718 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2018-01-27 23:02:46,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-27 23:02:46,728 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:46,729 INFO L330 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-27 23:02:46,730 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-27 23:02:46,738 INFO L82 PathProgramCache]: Analyzing trace with hash 114361, now seen corresponding path program 1 times [2018-01-27 23:02:46,740 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:46,741 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:46,802 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:46,802 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:02:46,802 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-27 23:02:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-27 23:02:46,874 INFO L389 BasicCegarLoop]: Counterexample might be feasible [2018-01-27 23:02:46,883 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-27 23:02:46,894 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-27 23:02:46,895 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-27 23:02:46,897 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-27 23:02:46,897 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-27 23:02:46,897 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-27 23:02:46,897 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-27 23:02:46,897 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-27 23:02:46,897 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == avgErr0EnsuresViolation======== [2018-01-27 23:02:46,897 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-27 23:02:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2018-01-27 23:02:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-27 23:02:46,902 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:46,902 INFO L330 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:02:46,902 INFO L371 AbstractCegarLoop]: === Iteration 1 === [avgErr0EnsuresViolation]=== [2018-01-27 23:02:46,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1916485188, now seen corresponding path program 1 times [2018-01-27 23:02:46,903 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:46,903 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:46,904 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:46,904 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:02:46,904 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:46,928 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 23:02:46,984 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-27 23:02:46,984 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-27 23:02:46,995 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-27 23:02:47,009 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-27 23:02:47,009 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-27 23:02:47,012 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 2 states. [2018-01-27 23:02:47,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:47,043 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2018-01-27 23:02:47,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-27 23:02:47,045 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-01-27 23:02:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:47,057 INFO L225 Difference]: With dead ends: 94 [2018-01-27 23:02:47,058 INFO L226 Difference]: Without dead ends: 0 [2018-01-27 23:02:47,063 INFO L533 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 [2018-01-27 23:02:47,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-27 23:02:47,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-27 23:02:47,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-27 23:02:47,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-27 23:02:47,215 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2018-01-27 23:02:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:47,215 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-27 23:02:47,215 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-27 23:02:47,216 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-27 23:02:47,216 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-27 23:02:47,219 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-27 23:02:47,220 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-27 23:02:47,220 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-27 23:02:47,220 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-27 23:02:47,220 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-27 23:02:47,220 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-27 23:02:47,220 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-27 23:02:47,221 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-27 23:02:47,221 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-27 23:02:47,223 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2018-01-27 23:02:47,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-27 23:02:47,226 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:47,226 INFO L330 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:02:47,226 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:47,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1565773136, now seen corresponding path program 1 times [2018-01-27 23:02:47,227 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:47,227 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:47,228 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:47,228 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:02:47,228 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:47,243 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-01-27 23:02:47,300 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-27 23:02:47,301 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-27 23:02:47,301 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-27 23:02:47,301 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-27 23:02:47,302 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-27 23:02:47,302 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 2 states. [2018-01-27 23:02:47,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:47,317 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2018-01-27 23:02:47,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-27 23:02:47,317 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2018-01-27 23:02:47,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:47,320 INFO L225 Difference]: With dead ends: 94 [2018-01-27 23:02:47,320 INFO L226 Difference]: Without dead ends: 50 [2018-01-27 23:02:47,321 INFO L533 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 [2018-01-27 23:02:47,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-27 23:02:47,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-01-27 23:02:47,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-27 23:02:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2018-01-27 23:02:47,337 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 46 [2018-01-27 23:02:47,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:47,337 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2018-01-27 23:02:47,337 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-27 23:02:47,337 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2018-01-27 23:02:47,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-01-27 23:02:47,340 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:47,341 INFO L330 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:02:47,341 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:47,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1555594602, now seen corresponding path program 1 times [2018-01-27 23:02:47,341 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:47,342 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:47,343 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:47,343 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:02:47,343 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:47,368 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-01-27 23:02:47,480 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-27 23:02:47,480 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-27 23:02:47,483 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-27 23:02:47,484 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-27 23:02:47,484 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-27 23:02:47,484 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 3 states. [2018-01-27 23:02:47,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:47,576 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2018-01-27 23:02:47,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-27 23:02:47,577 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2018-01-27 23:02:47,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:47,579 INFO L225 Difference]: With dead ends: 93 [2018-01-27 23:02:47,579 INFO L226 Difference]: Without dead ends: 55 [2018-01-27 23:02:47,580 INFO L533 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 [2018-01-27 23:02:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-27 23:02:47,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2018-01-27 23:02:47,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-27 23:02:47,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2018-01-27 23:02:47,593 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 51 [2018-01-27 23:02:47,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:47,593 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2018-01-27 23:02:47,594 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-27 23:02:47,594 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2018-01-27 23:02:47,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-27 23:02:47,596 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:47,596 INFO L330 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:02:47,596 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:47,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1858699323, now seen corresponding path program 1 times [2018-01-27 23:02:47,597 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:47,597 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:47,598 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:47,598 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:02:47,598 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:47,617 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-01-27 23:02:47,705 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:02:47,706 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:02:47,721 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:02:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:47,799 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:02:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-01-27 23:02:47,919 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-27 23:02:47,919 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-01-27 23:02:47,920 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-27 23:02:47,920 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-27 23:02:47,921 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-27 23:02:47,921 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 4 states. [2018-01-27 23:02:47,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:47,960 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2018-01-27 23:02:47,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-27 23:02:47,960 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2018-01-27 23:02:47,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:47,962 INFO L225 Difference]: With dead ends: 94 [2018-01-27 23:02:47,962 INFO L226 Difference]: Without dead ends: 57 [2018-01-27 23:02:47,963 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-27 23:02:47,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-27 23:02:47,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2018-01-27 23:02:47,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-27 23:02:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2018-01-27 23:02:47,972 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 56 [2018-01-27 23:02:47,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:47,973 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2018-01-27 23:02:47,973 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-27 23:02:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2018-01-27 23:02:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-01-27 23:02:47,975 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:47,975 INFO L330 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:02:47,975 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:47,976 INFO L82 PathProgramCache]: Analyzing trace with hash 992177361, now seen corresponding path program 1 times [2018-01-27 23:02:47,976 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:47,976 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:47,977 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:47,977 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:02:47,977 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:48,015 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:02:48,154 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-27 23:02:48,154 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-27 23:02:48,154 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-27 23:02:48,154 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-27 23:02:48,154 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-27 23:02:48,154 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 3 states. [2018-01-27 23:02:48,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:48,197 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2018-01-27 23:02:48,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-27 23:02:48,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2018-01-27 23:02:48,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:48,199 INFO L225 Difference]: With dead ends: 82 [2018-01-27 23:02:48,199 INFO L226 Difference]: Without dead ends: 60 [2018-01-27 23:02:48,200 INFO L533 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 [2018-01-27 23:02:48,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-27 23:02:48,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2018-01-27 23:02:48,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-27 23:02:48,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2018-01-27 23:02:48,207 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 71 [2018-01-27 23:02:48,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:48,210 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2018-01-27 23:02:48,211 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-27 23:02:48,211 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2018-01-27 23:02:48,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-01-27 23:02:48,213 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:48,214 INFO L330 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-01-27 23:02:48,214 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:48,214 INFO L82 PathProgramCache]: Analyzing trace with hash 50616265, now seen corresponding path program 1 times [2018-01-27 23:02:48,214 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:48,215 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:48,216 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:48,216 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:02:48,219 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:48,277 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:02:48,484 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:02:48,484 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:02:48,502 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:02:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:48,576 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:02:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:02:48,667 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:02:48,667 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-01-27 23:02:48,668 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-27 23:02:48,668 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-27 23:02:48,668 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-01-27 23:02:48,668 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 5 states. [2018-01-27 23:02:48,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:48,879 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2018-01-27 23:02:48,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-27 23:02:48,882 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2018-01-27 23:02:48,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:48,884 INFO L225 Difference]: With dead ends: 106 [2018-01-27 23:02:48,884 INFO L226 Difference]: Without dead ends: 64 [2018-01-27 23:02:48,884 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-01-27 23:02:48,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-01-27 23:02:48,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2018-01-27 23:02:48,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-01-27 23:02:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2018-01-27 23:02:48,891 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 77 [2018-01-27 23:02:48,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:48,891 INFO L432 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2018-01-27 23:02:48,891 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-27 23:02:48,891 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2018-01-27 23:02:48,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-01-27 23:02:48,897 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:48,897 INFO L330 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-01-27 23:02:48,897 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:48,897 INFO L82 PathProgramCache]: Analyzing trace with hash -421320648, now seen corresponding path program 2 times [2018-01-27 23:02:48,897 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:48,897 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:48,898 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:48,899 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:02:48,899 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:48,954 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:02:49,277 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:02:49,277 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-01-27 23:02:49,292 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:02:49,315 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:49,344 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:49,357 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:02:49,363 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:02:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:02:49,478 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:02:49,478 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-01-27 23:02:49,478 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-27 23:02:49,479 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-27 23:02:49,479 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-01-27 23:02:49,479 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 6 states. [2018-01-27 23:02:49,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:49,535 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2018-01-27 23:02:49,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-27 23:02:49,536 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2018-01-27 23:02:49,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:49,537 INFO L225 Difference]: With dead ends: 111 [2018-01-27 23:02:49,537 INFO L226 Difference]: Without dead ends: 69 [2018-01-27 23:02:49,538 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-01-27 23:02:49,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-27 23:02:49,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2018-01-27 23:02:49,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-27 23:02:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2018-01-27 23:02:49,544 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 82 [2018-01-27 23:02:49,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:49,545 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2018-01-27 23:02:49,545 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-27 23:02:49,545 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2018-01-27 23:02:49,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-01-27 23:02:49,547 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:49,547 INFO L330 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:02:49,547 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:49,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1798325545, now seen corresponding path program 3 times [2018-01-27 23:02:49,548 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:49,549 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:49,550 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:49,550 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:02:49,550 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:49,574 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-01-27 23:02:49,717 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:02:49,718 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:02:49,723 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:02:49,744 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:02:49,764 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:02:49,781 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:02:49,804 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:02:50,033 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-01-27 23:02:50,064 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:02:50,065 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2018-01-27 23:02:50,065 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-27 23:02:50,065 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-27 23:02:50,066 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-27 23:02:50,066 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 8 states. [2018-01-27 23:02:50,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:50,252 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2018-01-27 23:02:50,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-27 23:02:50,253 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 87 [2018-01-27 23:02:50,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:50,254 INFO L225 Difference]: With dead ends: 124 [2018-01-27 23:02:50,254 INFO L226 Difference]: Without dead ends: 82 [2018-01-27 23:02:50,255 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-27 23:02:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-01-27 23:02:50,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2018-01-27 23:02:50,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-27 23:02:50,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2018-01-27 23:02:50,268 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 87 [2018-01-27 23:02:50,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:50,269 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2018-01-27 23:02:50,269 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-27 23:02:50,269 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2018-01-27 23:02:50,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-01-27 23:02:50,270 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:50,271 INFO L330 BasicCegarLoop]: trace histogram [9, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:02:50,271 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:50,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1813629278, now seen corresponding path program 4 times [2018-01-27 23:02:50,271 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:50,271 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:50,272 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:50,272 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:02:50,273 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:50,318 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-01-27 23:02:50,532 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:02:50,532 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:02:50,541 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 23:02:50,607 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:02:50,614 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:02:50,747 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-01-27 23:02:50,781 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:02:50,781 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-01-27 23:02:50,782 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-27 23:02:50,782 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-27 23:02:50,782 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-01-27 23:02:50,782 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 8 states. [2018-01-27 23:02:50,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:50,873 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2018-01-27 23:02:50,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-27 23:02:50,874 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 107 [2018-01-27 23:02:50,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:50,875 INFO L225 Difference]: With dead ends: 131 [2018-01-27 23:02:50,875 INFO L226 Difference]: Without dead ends: 84 [2018-01-27 23:02:50,876 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-01-27 23:02:50,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-01-27 23:02:50,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2018-01-27 23:02:50,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-01-27 23:02:50,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2018-01-27 23:02:50,884 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 107 [2018-01-27 23:02:50,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:50,884 INFO L432 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2018-01-27 23:02:50,884 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-27 23:02:50,884 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2018-01-27 23:02:50,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-01-27 23:02:50,886 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:50,886 INFO L330 BasicCegarLoop]: trace histogram [9, 6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:02:50,886 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:50,886 INFO L82 PathProgramCache]: Analyzing trace with hash -350524019, now seen corresponding path program 5 times [2018-01-27 23:02:50,887 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:50,887 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:50,888 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:50,888 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:02:50,888 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:50,914 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-01-27 23:02:51,168 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:02:51,168 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:02:51,177 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 23:02:51,192 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:51,195 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:51,199 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:51,206 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:51,238 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:51,239 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:02:51,247 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:02:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 62 proven. 9 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-01-27 23:02:51,335 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:02:51,335 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2018-01-27 23:02:51,336 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-27 23:02:51,336 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-27 23:02:51,336 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:02:51,337 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 11 states. [2018-01-27 23:02:51,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:51,696 INFO L93 Difference]: Finished difference Result 144 states and 156 transitions. [2018-01-27 23:02:51,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-27 23:02:51,697 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 112 [2018-01-27 23:02:51,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:51,698 INFO L225 Difference]: With dead ends: 144 [2018-01-27 23:02:51,698 INFO L226 Difference]: Without dead ends: 97 [2018-01-27 23:02:51,699 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:02:51,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-01-27 23:02:51,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2018-01-27 23:02:51,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-01-27 23:02:51,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2018-01-27 23:02:51,707 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 112 [2018-01-27 23:02:51,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:51,707 INFO L432 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2018-01-27 23:02:51,707 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-27 23:02:51,707 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2018-01-27 23:02:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-01-27 23:02:51,709 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:51,709 INFO L330 BasicCegarLoop]: trace histogram [12, 9, 9, 9, 9, 7, 6, 6, 6, 6, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:02:51,709 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:51,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1533196744, now seen corresponding path program 6 times [2018-01-27 23:02:51,709 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:51,710 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:51,710 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:51,710 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:02:51,711 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:51,736 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2018-01-27 23:02:51,964 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:02:51,964 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:02:51,969 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 23:02:51,986 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:02:51,989 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:02:51,994 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:02:52,001 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:02:52,008 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:02:52,022 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:02:52,028 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:02:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 126 proven. 2 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2018-01-27 23:02:52,175 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:02:52,175 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 11 [2018-01-27 23:02:52,175 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-27 23:02:52,175 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-27 23:02:52,175 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:02:52,176 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 11 states. [2018-01-27 23:02:52,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:52,279 INFO L93 Difference]: Finished difference Result 161 states and 170 transitions. [2018-01-27 23:02:52,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-27 23:02:52,280 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2018-01-27 23:02:52,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:52,281 INFO L225 Difference]: With dead ends: 161 [2018-01-27 23:02:52,282 INFO L226 Difference]: Without dead ends: 109 [2018-01-27 23:02:52,282 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:02:52,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-01-27 23:02:52,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 102. [2018-01-27 23:02:52,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-01-27 23:02:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2018-01-27 23:02:52,292 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 132 [2018-01-27 23:02:52,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:52,292 INFO L432 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2018-01-27 23:02:52,293 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-27 23:02:52,293 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2018-01-27 23:02:52,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-01-27 23:02:52,294 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:52,295 INFO L330 BasicCegarLoop]: trace histogram [12, 9, 9, 9, 9, 8, 7, 7, 7, 7, 3, 3, 3, 3, 3, 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] [2018-01-27 23:02:52,295 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:52,295 INFO L82 PathProgramCache]: Analyzing trace with hash 960280545, now seen corresponding path program 7 times [2018-01-27 23:02:52,295 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:52,295 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:52,296 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:52,296 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:02:52,296 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:52,328 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:02:52,696 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:02:52,696 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:02:52,701 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:02:52,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:52,738 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:02:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:02:52,783 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:02:52,784 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-01-27 23:02:52,784 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-27 23:02:52,784 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-27 23:02:52,784 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:02:52,785 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 11 states. [2018-01-27 23:02:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:52,819 INFO L93 Difference]: Finished difference Result 168 states and 176 transitions. [2018-01-27 23:02:52,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-27 23:02:52,819 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2018-01-27 23:02:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:52,820 INFO L225 Difference]: With dead ends: 168 [2018-01-27 23:02:52,820 INFO L226 Difference]: Without dead ends: 110 [2018-01-27 23:02:52,821 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-01-27 23:02:52,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-01-27 23:02:52,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2018-01-27 23:02:52,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-01-27 23:02:52,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2018-01-27 23:02:52,828 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 143 [2018-01-27 23:02:52,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:52,828 INFO L432 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2018-01-27 23:02:52,829 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-27 23:02:52,829 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2018-01-27 23:02:52,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-01-27 23:02:52,830 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:52,831 INFO L330 BasicCegarLoop]: trace histogram [12, 9, 9, 9, 9, 9, 8, 8, 8, 8, 3, 3, 3, 3, 3, 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] [2018-01-27 23:02:52,831 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:52,831 INFO L82 PathProgramCache]: Analyzing trace with hash 722219152, now seen corresponding path program 8 times [2018-01-27 23:02:52,831 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:52,831 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:52,832 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:52,832 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:02:52,832 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:52,855 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:02:53,282 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:02:53,282 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:02:53,288 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:02:53,303 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:53,327 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:53,330 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:02:53,333 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:02:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:02:53,385 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:02:53,385 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-01-27 23:02:53,386 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-27 23:02:53,386 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-27 23:02:53,386 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-01-27 23:02:53,386 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 12 states. [2018-01-27 23:02:53,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:53,428 INFO L93 Difference]: Finished difference Result 173 states and 181 transitions. [2018-01-27 23:02:53,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-27 23:02:53,429 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 148 [2018-01-27 23:02:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:53,431 INFO L225 Difference]: With dead ends: 173 [2018-01-27 23:02:53,431 INFO L226 Difference]: Without dead ends: 115 [2018-01-27 23:02:53,431 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-01-27 23:02:53,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-01-27 23:02:53,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2018-01-27 23:02:53,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-01-27 23:02:53,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2018-01-27 23:02:53,440 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 148 [2018-01-27 23:02:53,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:53,440 INFO L432 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2018-01-27 23:02:53,440 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-27 23:02:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2018-01-27 23:02:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-01-27 23:02:53,441 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:53,441 INFO L330 BasicCegarLoop]: trace histogram [12, 10, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 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] [2018-01-27 23:02:53,442 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:53,442 INFO L82 PathProgramCache]: Analyzing trace with hash -221786815, now seen corresponding path program 9 times [2018-01-27 23:02:53,442 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:53,442 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:53,443 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:53,443 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:02:53,443 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:53,474 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-01-27 23:02:54,068 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:02:54,068 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:02:54,073 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:02:54,088 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:02:54,094 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:02:54,099 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:02:54,105 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:02:54,106 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:02:54,109 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:02:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 124 proven. 21 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2018-01-27 23:02:54,267 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:02:54,267 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2018-01-27 23:02:54,267 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-27 23:02:54,267 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-27 23:02:54,268 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2018-01-27 23:02:54,268 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 16 states. [2018-01-27 23:02:54,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:54,392 INFO L93 Difference]: Finished difference Result 186 states and 198 transitions. [2018-01-27 23:02:54,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-27 23:02:54,392 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 153 [2018-01-27 23:02:54,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:54,394 INFO L225 Difference]: With dead ends: 186 [2018-01-27 23:02:54,394 INFO L226 Difference]: Without dead ends: 128 [2018-01-27 23:02:54,394 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2018-01-27 23:02:54,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-01-27 23:02:54,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2018-01-27 23:02:54,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-01-27 23:02:54,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2018-01-27 23:02:54,406 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 153 [2018-01-27 23:02:54,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:54,407 INFO L432 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2018-01-27 23:02:54,407 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-27 23:02:54,407 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2018-01-27 23:02:54,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-01-27 23:02:54,408 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:54,408 INFO L330 BasicCegarLoop]: trace histogram [15, 12, 12, 12, 12, 11, 10, 10, 10, 10, 3, 3, 3, 3, 3, 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] [2018-01-27 23:02:54,408 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:54,409 INFO L82 PathProgramCache]: Analyzing trace with hash 284097414, now seen corresponding path program 10 times [2018-01-27 23:02:54,409 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:54,410 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:54,410 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:54,411 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:02:54,411 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:54,436 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2018-01-27 23:02:55,026 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:02:55,058 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:02:55,067 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 23:02:55,126 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:02:55,130 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:02:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2018-01-27 23:02:55,175 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:02:55,175 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-01-27 23:02:55,175 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-27 23:02:55,175 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-27 23:02:55,176 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-01-27 23:02:55,176 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 14 states. [2018-01-27 23:02:55,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:55,215 INFO L93 Difference]: Finished difference Result 193 states and 201 transitions. [2018-01-27 23:02:55,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-27 23:02:55,216 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 173 [2018-01-27 23:02:55,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:55,217 INFO L225 Difference]: With dead ends: 193 [2018-01-27 23:02:55,217 INFO L226 Difference]: Without dead ends: 130 [2018-01-27 23:02:55,218 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-01-27 23:02:55,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-01-27 23:02:55,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2018-01-27 23:02:55,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-01-27 23:02:55,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2018-01-27 23:02:55,224 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 173 [2018-01-27 23:02:55,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:55,225 INFO L432 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2018-01-27 23:02:55,225 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-27 23:02:55,225 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2018-01-27 23:02:55,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-01-27 23:02:55,235 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:55,235 INFO L330 BasicCegarLoop]: trace histogram [15, 12, 12, 12, 12, 12, 11, 11, 11, 11, 3, 3, 3, 3, 3, 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] [2018-01-27 23:02:55,236 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:55,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1753393163, now seen corresponding path program 11 times [2018-01-27 23:02:55,236 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:55,236 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:55,237 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:55,237 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:02:55,237 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:55,263 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2018-01-27 23:02:55,512 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:02:55,512 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:02:55,517 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 23:02:55,529 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:55,531 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:55,536 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:55,539 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:55,544 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:55,560 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:55,584 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:55,601 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:55,627 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:55,694 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:55,770 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:55,771 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:02:55,776 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:02:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 198 proven. 38 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2018-01-27 23:02:55,922 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:02:55,923 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2018-01-27 23:02:55,923 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-27 23:02:55,923 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-27 23:02:55,924 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2018-01-27 23:02:55,924 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand 19 states. [2018-01-27 23:02:56,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:56,186 INFO L93 Difference]: Finished difference Result 206 states and 218 transitions. [2018-01-27 23:02:56,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-27 23:02:56,187 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 178 [2018-01-27 23:02:56,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:56,188 INFO L225 Difference]: With dead ends: 206 [2018-01-27 23:02:56,189 INFO L226 Difference]: Without dead ends: 143 [2018-01-27 23:02:56,189 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2018-01-27 23:02:56,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-01-27 23:02:56,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2018-01-27 23:02:56,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-01-27 23:02:56,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2018-01-27 23:02:56,196 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 178 [2018-01-27 23:02:56,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:56,196 INFO L432 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2018-01-27 23:02:56,196 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-27 23:02:56,196 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2018-01-27 23:02:56,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-01-27 23:02:56,199 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:56,199 INFO L330 BasicCegarLoop]: trace histogram [18, 15, 15, 15, 15, 13, 12, 12, 12, 12, 3, 3, 3, 3, 3, 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] [2018-01-27 23:02:56,199 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:56,200 INFO L82 PathProgramCache]: Analyzing trace with hash 585748624, now seen corresponding path program 12 times [2018-01-27 23:02:56,200 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:56,200 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:56,201 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:56,201 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:02:56,201 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:56,227 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2018-01-27 23:02:56,486 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:02:56,486 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:02:56,492 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 23:02:56,508 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:02:56,511 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:02:56,515 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:02:56,519 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:02:56,523 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:02:56,529 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:02:56,537 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:02:56,538 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:02:56,542 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:02:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 302 proven. 10 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2018-01-27 23:02:56,861 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:02:56,861 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5] total 18 [2018-01-27 23:02:56,861 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-27 23:02:56,862 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-27 23:02:56,862 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:02:56,862 INFO L87 Difference]: Start difference. First operand 137 states and 141 transitions. Second operand 18 states. [2018-01-27 23:02:56,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:56,971 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2018-01-27 23:02:56,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-27 23:02:56,971 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 198 [2018-01-27 23:02:56,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:56,973 INFO L225 Difference]: With dead ends: 223 [2018-01-27 23:02:56,973 INFO L226 Difference]: Without dead ends: 155 [2018-01-27 23:02:56,974 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:02:56,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-01-27 23:02:56,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 148. [2018-01-27 23:02:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-01-27 23:02:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2018-01-27 23:02:56,981 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 198 [2018-01-27 23:02:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:56,982 INFO L432 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2018-01-27 23:02:56,982 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-27 23:02:56,982 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2018-01-27 23:02:56,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-01-27 23:02:56,984 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:56,984 INFO L330 BasicCegarLoop]: trace histogram [18, 15, 15, 15, 15, 14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:02:56,984 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:56,985 INFO L82 PathProgramCache]: Analyzing trace with hash -763381255, now seen corresponding path program 13 times [2018-01-27 23:02:56,985 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:56,985 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:56,986 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:56,986 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:02:56,986 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:57,017 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:02:57,297 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:02:57,297 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:02:57,308 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:02:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:57,356 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:02:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:02:57,462 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:02:57,462 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-01-27 23:02:57,462 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-27 23:02:57,463 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-27 23:02:57,463 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-01-27 23:02:57,463 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 17 states. [2018-01-27 23:02:57,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:57,916 INFO L93 Difference]: Finished difference Result 230 states and 238 transitions. [2018-01-27 23:02:57,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-27 23:02:57,917 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 209 [2018-01-27 23:02:57,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:57,918 INFO L225 Difference]: With dead ends: 230 [2018-01-27 23:02:57,918 INFO L226 Difference]: Without dead ends: 156 [2018-01-27 23:02:57,918 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-01-27 23:02:57,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-01-27 23:02:57,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2018-01-27 23:02:57,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-01-27 23:02:57,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2018-01-27 23:02:57,925 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 209 [2018-01-27 23:02:57,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:57,925 INFO L432 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2018-01-27 23:02:57,925 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-27 23:02:57,925 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2018-01-27 23:02:57,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-01-27 23:02:57,926 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:57,927 INFO L330 BasicCegarLoop]: trace histogram [18, 15, 15, 15, 15, 15, 14, 14, 14, 14, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:02:57,927 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:57,927 INFO L82 PathProgramCache]: Analyzing trace with hash 2144652008, now seen corresponding path program 14 times [2018-01-27 23:02:57,927 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:57,927 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:57,928 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:57,928 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:02:57,928 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:57,952 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:02:58,223 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:02:58,223 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:02:58,228 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:02:58,245 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:58,268 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:02:58,272 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:02:58,277 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:02:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:02:58,339 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:02:58,339 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-01-27 23:02:58,340 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-27 23:02:58,340 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-27 23:02:58,340 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:02:58,341 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand 18 states. [2018-01-27 23:02:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:58,423 INFO L93 Difference]: Finished difference Result 235 states and 243 transitions. [2018-01-27 23:02:58,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-27 23:02:58,424 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 214 [2018-01-27 23:02:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:58,426 INFO L225 Difference]: With dead ends: 235 [2018-01-27 23:02:58,426 INFO L226 Difference]: Without dead ends: 161 [2018-01-27 23:02:58,426 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-01-27 23:02:58,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-01-27 23:02:58,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2018-01-27 23:02:58,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-01-27 23:02:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2018-01-27 23:02:58,433 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 214 [2018-01-27 23:02:58,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:58,433 INFO L432 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2018-01-27 23:02:58,433 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-27 23:02:58,433 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2018-01-27 23:02:58,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-01-27 23:02:58,435 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:58,435 INFO L330 BasicCegarLoop]: trace histogram [18, 16, 15, 15, 15, 15, 15, 15, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:02:58,435 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:58,436 INFO L82 PathProgramCache]: Analyzing trace with hash -989857959, now seen corresponding path program 15 times [2018-01-27 23:02:58,436 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:58,436 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:58,436 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:58,437 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:02:58,437 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:58,463 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:02:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1212 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2018-01-27 23:02:59,217 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:02:59,217 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:02:59,222 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:02:59,247 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:02:59,269 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:02:59,280 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:02:59,299 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:02:59,315 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:02:59,324 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:02:59,329 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:02:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1212 backedges. 302 proven. 24 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2018-01-27 23:02:59,526 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:02:59,527 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6] total 22 [2018-01-27 23:02:59,527 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-27 23:02:59,527 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-27 23:02:59,528 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-01-27 23:02:59,528 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand 22 states. [2018-01-27 23:02:59,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:02:59,767 INFO L93 Difference]: Finished difference Result 250 states and 259 transitions. [2018-01-27 23:02:59,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-27 23:02:59,767 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 219 [2018-01-27 23:02:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:02:59,768 INFO L225 Difference]: With dead ends: 250 [2018-01-27 23:02:59,769 INFO L226 Difference]: Without dead ends: 176 [2018-01-27 23:02:59,769 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-01-27 23:02:59,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-01-27 23:02:59,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 169. [2018-01-27 23:02:59,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-01-27 23:02:59,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2018-01-27 23:02:59,775 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 219 [2018-01-27 23:02:59,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:02:59,776 INFO L432 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2018-01-27 23:02:59,776 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-27 23:02:59,776 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2018-01-27 23:02:59,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-01-27 23:02:59,777 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:02:59,778 INFO L330 BasicCegarLoop]: trace histogram [18, 17, 16, 16, 16, 16, 15, 15, 15, 15, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:02:59,778 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:02:59,778 INFO L82 PathProgramCache]: Analyzing trace with hash -2048957632, now seen corresponding path program 16 times [2018-01-27 23:02:59,778 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:02:59,778 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:02:59,779 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:59,779 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:02:59,779 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:02:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:02:59,805 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:03:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2018-01-27 23:03:00,822 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:03:00,852 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:03:00,857 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 23:03:00,999 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:03:01,003 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:03:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2018-01-27 23:03:01,072 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:03:01,072 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-01-27 23:03:01,073 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-27 23:03:01,073 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-27 23:03:01,073 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-01-27 23:03:01,073 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand 20 states. [2018-01-27 23:03:01,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:03:01,175 INFO L93 Difference]: Finished difference Result 257 states and 265 transitions. [2018-01-27 23:03:01,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-27 23:03:01,176 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 230 [2018-01-27 23:03:01,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:03:01,178 INFO L225 Difference]: With dead ends: 257 [2018-01-27 23:03:01,178 INFO L226 Difference]: Without dead ends: 177 [2018-01-27 23:03:01,178 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-01-27 23:03:01,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-01-27 23:03:01,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2018-01-27 23:03:01,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-01-27 23:03:01,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2018-01-27 23:03:01,185 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 230 [2018-01-27 23:03:01,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:03:01,186 INFO L432 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2018-01-27 23:03:01,186 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-27 23:03:01,186 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2018-01-27 23:03:01,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-01-27 23:03:01,187 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:03:01,188 INFO L330 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 15, 15, 15, 15, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:03:01,188 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:03:01,188 INFO L82 PathProgramCache]: Analyzing trace with hash -500331087, now seen corresponding path program 17 times [2018-01-27 23:03:01,188 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:03:01,188 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:03:01,189 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:01,190 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:03:01,190 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:03:01,219 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:03:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2018-01-27 23:03:01,582 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:03:01,582 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:03:01,587 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 23:03:01,604 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:01,613 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:01,614 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:01,616 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:01,617 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:01,620 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:01,623 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:01,627 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:01,634 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:01,646 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:01,680 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:01,717 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:01,748 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:01,793 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:02,028 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:02,178 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:02,455 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:02,456 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:03:02,462 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:03:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 296 proven. 60 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2018-01-27 23:03:03,624 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:03:03,625 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2018-01-27 23:03:03,625 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-27 23:03:03,625 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-27 23:03:03,626 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:03:03,626 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand 26 states. [2018-01-27 23:03:05,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:03:05,177 INFO L93 Difference]: Finished difference Result 270 states and 282 transitions. [2018-01-27 23:03:05,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-27 23:03:05,178 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 235 [2018-01-27 23:03:05,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:03:05,180 INFO L225 Difference]: With dead ends: 270 [2018-01-27 23:03:05,180 INFO L226 Difference]: Without dead ends: 190 [2018-01-27 23:03:05,181 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:03:05,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-01-27 23:03:05,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2018-01-27 23:03:05,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-01-27 23:03:05,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2018-01-27 23:03:05,189 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 235 [2018-01-27 23:03:05,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:03:05,189 INFO L432 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2018-01-27 23:03:05,190 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-27 23:03:05,190 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2018-01-27 23:03:05,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-01-27 23:03:05,192 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:03:05,193 INFO L330 BasicCegarLoop]: trace histogram [21, 19, 18, 18, 18, 18, 18, 18, 18, 18, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:03:05,193 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:03:05,193 INFO L82 PathProgramCache]: Analyzing trace with hash -920385834, now seen corresponding path program 18 times [2018-01-27 23:03:05,194 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:03:05,194 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:03:05,194 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:05,195 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:03:05,195 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:03:05,233 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:03:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-01-27 23:03:06,190 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:03:06,207 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:03:06,212 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 23:03:06,235 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:06,248 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:06,265 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:06,274 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:06,278 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:06,282 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:06,287 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:06,296 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:06,336 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:06,398 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:06,526 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:06,528 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:03:06,531 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:03:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 420 proven. 44 refuted. 0 times theorem prover too weak. 1272 trivial. 0 not checked. [2018-01-27 23:03:06,636 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:03:06,637 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7] total 26 [2018-01-27 23:03:06,637 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-27 23:03:06,637 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-27 23:03:06,638 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=420, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:03:06,638 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand 26 states. [2018-01-27 23:03:06,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:03:06,778 INFO L93 Difference]: Finished difference Result 287 states and 296 transitions. [2018-01-27 23:03:06,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-27 23:03:06,778 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 255 [2018-01-27 23:03:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:03:06,779 INFO L225 Difference]: With dead ends: 287 [2018-01-27 23:03:06,779 INFO L226 Difference]: Without dead ends: 202 [2018-01-27 23:03:06,780 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=230, Invalid=420, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:03:06,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-01-27 23:03:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 195. [2018-01-27 23:03:06,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-01-27 23:03:06,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 199 transitions. [2018-01-27 23:03:06,785 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 199 transitions. Word has length 255 [2018-01-27 23:03:06,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:03:06,786 INFO L432 AbstractCegarLoop]: Abstraction has 195 states and 199 transitions. [2018-01-27 23:03:06,786 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-27 23:03:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 199 transitions. [2018-01-27 23:03:06,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-01-27 23:03:06,787 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:03:06,788 INFO L330 BasicCegarLoop]: trace histogram [21, 20, 19, 19, 19, 19, 18, 18, 18, 18, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:03:06,788 INFO L371 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:03:06,788 INFO L82 PathProgramCache]: Analyzing trace with hash 679104013, now seen corresponding path program 19 times [2018-01-27 23:03:06,788 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:03:06,788 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:03:06,789 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:06,789 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:03:06,789 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:03:06,819 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:03:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1854 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-01-27 23:03:07,602 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:03:07,602 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:03:07,608 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:03:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:03:07,680 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:03:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1854 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-01-27 23:03:07,817 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:03:07,817 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-01-27 23:03:07,817 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-01-27 23:03:07,817 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-01-27 23:03:07,817 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-01-27 23:03:07,818 INFO L87 Difference]: Start difference. First operand 195 states and 199 transitions. Second operand 23 states. [2018-01-27 23:03:07,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:03:07,915 INFO L93 Difference]: Finished difference Result 294 states and 302 transitions. [2018-01-27 23:03:07,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-27 23:03:07,915 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 266 [2018-01-27 23:03:07,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:03:07,916 INFO L225 Difference]: With dead ends: 294 [2018-01-27 23:03:07,916 INFO L226 Difference]: Without dead ends: 203 [2018-01-27 23:03:07,917 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-01-27 23:03:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-01-27 23:03:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 200. [2018-01-27 23:03:07,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-01-27 23:03:07,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2018-01-27 23:03:07,923 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 266 [2018-01-27 23:03:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:03:07,924 INFO L432 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2018-01-27 23:03:07,924 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-01-27 23:03:07,924 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2018-01-27 23:03:07,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-01-27 23:03:07,925 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:03:07,926 INFO L330 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 18, 18, 18, 18, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:03:07,926 INFO L371 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:03:07,926 INFO L82 PathProgramCache]: Analyzing trace with hash 730846206, now seen corresponding path program 20 times [2018-01-27 23:03:07,926 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:03:07,926 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:03:07,927 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:07,927 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:03:07,927 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:03:07,955 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:03:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-01-27 23:03:08,587 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:03:08,588 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:03:08,593 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:03:08,612 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:08,641 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:08,646 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:03:08,651 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:03:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-01-27 23:03:08,810 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:03:08,810 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-01-27 23:03:08,810 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-27 23:03:08,810 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-27 23:03:08,810 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-01-27 23:03:08,811 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand 24 states. [2018-01-27 23:03:08,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:03:08,916 INFO L93 Difference]: Finished difference Result 299 states and 307 transitions. [2018-01-27 23:03:08,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-27 23:03:08,917 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 271 [2018-01-27 23:03:08,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:03:08,919 INFO L225 Difference]: With dead ends: 299 [2018-01-27 23:03:08,919 INFO L226 Difference]: Without dead ends: 208 [2018-01-27 23:03:08,920 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-01-27 23:03:08,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-01-27 23:03:08,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 205. [2018-01-27 23:03:08,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-01-27 23:03:08,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 209 transitions. [2018-01-27 23:03:08,928 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 209 transitions. Word has length 271 [2018-01-27 23:03:08,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:03:08,929 INFO L432 AbstractCegarLoop]: Abstraction has 205 states and 209 transitions. [2018-01-27 23:03:08,929 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-27 23:03:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 209 transitions. [2018-01-27 23:03:08,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-01-27 23:03:08,931 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:03:08,931 INFO L330 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 18, 18, 18, 18, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:03:08,931 INFO L371 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:03:08,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1566923949, now seen corresponding path program 21 times [2018-01-27 23:03:08,931 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:03:08,931 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:03:08,932 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:08,932 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:03:08,932 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:03:08,964 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:03:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2053 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-01-27 23:03:09,710 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:03:09,710 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:03:09,715 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:03:09,733 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:03:09,739 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:03:09,743 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:03:09,748 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:03:09,754 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:03:09,768 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:03:09,798 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:03:09,800 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:03:09,803 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:03:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2053 backedges. 420 proven. 70 refuted. 0 times theorem prover too weak. 1563 trivial. 0 not checked. [2018-01-27 23:03:09,934 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:03:09,934 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8] total 30 [2018-01-27 23:03:09,935 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-27 23:03:09,935 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-27 23:03:09,935 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2018-01-27 23:03:09,935 INFO L87 Difference]: Start difference. First operand 205 states and 209 transitions. Second operand 30 states. [2018-01-27 23:03:10,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:03:10,069 INFO L93 Difference]: Finished difference Result 314 states and 323 transitions. [2018-01-27 23:03:10,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-27 23:03:10,070 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 276 [2018-01-27 23:03:10,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:03:10,072 INFO L225 Difference]: With dead ends: 314 [2018-01-27 23:03:10,072 INFO L226 Difference]: Without dead ends: 223 [2018-01-27 23:03:10,073 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2018-01-27 23:03:10,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-01-27 23:03:10,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 216. [2018-01-27 23:03:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-01-27 23:03:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 220 transitions. [2018-01-27 23:03:10,081 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 220 transitions. Word has length 276 [2018-01-27 23:03:10,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:03:10,081 INFO L432 AbstractCegarLoop]: Abstraction has 216 states and 220 transitions. [2018-01-27 23:03:10,081 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-27 23:03:10,081 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 220 transitions. [2018-01-27 23:03:10,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-01-27 23:03:10,083 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:03:10,084 INFO L330 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 21, 18, 18, 18, 18, 7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:03:10,084 INFO L371 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:03:10,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1856004902, now seen corresponding path program 22 times [2018-01-27 23:03:10,085 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:03:10,085 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:03:10,085 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:10,085 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:03:10,086 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:03:10,118 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:03:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2192 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 993 trivial. 0 not checked. [2018-01-27 23:03:11,239 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:03:11,239 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:03:11,244 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 23:03:11,497 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:03:11,503 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:03:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2192 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 993 trivial. 0 not checked. [2018-01-27 23:03:11,580 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:03:11,581 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-01-27 23:03:11,581 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-27 23:03:11,581 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-27 23:03:11,581 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:03:11,582 INFO L87 Difference]: Start difference. First operand 216 states and 220 transitions. Second operand 26 states. [2018-01-27 23:03:11,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:03:11,652 INFO L93 Difference]: Finished difference Result 321 states and 329 transitions. [2018-01-27 23:03:11,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-27 23:03:11,652 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 287 [2018-01-27 23:03:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:03:11,653 INFO L225 Difference]: With dead ends: 321 [2018-01-27 23:03:11,653 INFO L226 Difference]: Without dead ends: 224 [2018-01-27 23:03:11,654 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-01-27 23:03:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-01-27 23:03:11,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2018-01-27 23:03:11,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-01-27 23:03:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 225 transitions. [2018-01-27 23:03:11,663 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 225 transitions. Word has length 287 [2018-01-27 23:03:11,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:03:11,663 INFO L432 AbstractCegarLoop]: Abstraction has 221 states and 225 transitions. [2018-01-27 23:03:11,663 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-27 23:03:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 225 transitions. [2018-01-27 23:03:11,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-01-27 23:03:11,666 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:03:11,666 INFO L330 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 21, 18, 18, 18, 18, 7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:03:11,666 INFO L371 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:03:11,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1199264299, now seen corresponding path program 23 times [2018-01-27 23:03:11,666 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:03:11,667 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:03:11,667 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:11,667 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:03:11,667 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:03:11,694 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:03:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 993 trivial. 0 not checked. [2018-01-27 23:03:12,623 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:03:12,623 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:03:12,628 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 23:03:12,643 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:12,659 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:12,673 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:12,682 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:12,696 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:12,710 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:12,719 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:12,734 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:12,737 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:12,742 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:12,747 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:12,752 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:12,763 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:12,778 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:12,792 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:12,842 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:12,893 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:13,093 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:13,364 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:13,563 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:13,976 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:14,541 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:15,347 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:15,350 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:03:15,357 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:03:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 414 proven. 87 refuted. 0 times theorem prover too weak. 1803 trivial. 0 not checked. [2018-01-27 23:03:15,582 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:03:15,583 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2018-01-27 23:03:15,583 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-01-27 23:03:15,583 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-01-27 23:03:15,584 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2018-01-27 23:03:15,584 INFO L87 Difference]: Start difference. First operand 221 states and 225 transitions. Second operand 33 states. [2018-01-27 23:03:15,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:03:15,695 INFO L93 Difference]: Finished difference Result 334 states and 346 transitions. [2018-01-27 23:03:15,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-01-27 23:03:15,695 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 292 [2018-01-27 23:03:15,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:03:15,696 INFO L225 Difference]: With dead ends: 334 [2018-01-27 23:03:15,696 INFO L226 Difference]: Without dead ends: 237 [2018-01-27 23:03:15,697 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2018-01-27 23:03:15,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-01-27 23:03:15,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 231. [2018-01-27 23:03:15,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-01-27 23:03:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 235 transitions. [2018-01-27 23:03:15,704 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 235 transitions. Word has length 292 [2018-01-27 23:03:15,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:03:15,705 INFO L432 AbstractCegarLoop]: Abstraction has 231 states and 235 transitions. [2018-01-27 23:03:15,705 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-01-27 23:03:15,705 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 235 transitions. [2018-01-27 23:03:15,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-01-27 23:03:15,707 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:03:15,708 INFO L330 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 21, 21, 21, 21, 7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:03:15,708 INFO L371 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:03:15,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1768888848, now seen corresponding path program 24 times [2018-01-27 23:03:15,708 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:03:15,708 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:03:15,709 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:15,709 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:03:15,709 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:03:15,740 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:03:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2724 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2018-01-27 23:03:16,837 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:03:16,837 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:03:16,844 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 23:03:16,868 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:16,870 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:16,874 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:16,877 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:16,882 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:16,889 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:16,895 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:16,926 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:16,950 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:17,089 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:17,255 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:17,301 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:17,375 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:17,660 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:17,785 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:17,787 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:03:17,792 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:03:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2724 backedges. 558 proven. 102 refuted. 0 times theorem prover too weak. 2064 trivial. 0 not checked. [2018-01-27 23:03:18,211 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:03:18,212 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9] total 34 [2018-01-27 23:03:18,212 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-27 23:03:18,212 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-27 23:03:18,213 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2018-01-27 23:03:18,213 INFO L87 Difference]: Start difference. First operand 231 states and 235 transitions. Second operand 34 states. [2018-01-27 23:03:18,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:03:18,313 INFO L93 Difference]: Finished difference Result 351 states and 360 transitions. [2018-01-27 23:03:18,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-27 23:03:18,313 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 312 [2018-01-27 23:03:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:03:18,314 INFO L225 Difference]: With dead ends: 351 [2018-01-27 23:03:18,314 INFO L226 Difference]: Without dead ends: 249 [2018-01-27 23:03:18,315 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2018-01-27 23:03:18,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-01-27 23:03:18,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 242. [2018-01-27 23:03:18,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-01-27 23:03:18,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 246 transitions. [2018-01-27 23:03:18,325 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 246 transitions. Word has length 312 [2018-01-27 23:03:18,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:03:18,325 INFO L432 AbstractCegarLoop]: Abstraction has 242 states and 246 transitions. [2018-01-27 23:03:18,325 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-27 23:03:18,325 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 246 transitions. [2018-01-27 23:03:18,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-01-27 23:03:18,327 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:03:18,328 INFO L330 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 24, 21, 21, 21, 21, 8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:03:18,328 INFO L371 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:03:18,328 INFO L82 PathProgramCache]: Analyzing trace with hash 270691097, now seen corresponding path program 25 times [2018-01-27 23:03:18,328 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:03:18,328 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:03:18,329 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:18,329 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:03:18,329 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:03:18,361 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:03:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-01-27 23:03:19,148 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:03:19,148 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:03:19,157 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:03:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:03:19,220 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:03:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-01-27 23:03:19,400 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:03:19,400 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-01-27 23:03:19,401 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-01-27 23:03:19,401 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-01-27 23:03:19,401 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-01-27 23:03:19,401 INFO L87 Difference]: Start difference. First operand 242 states and 246 transitions. Second operand 29 states. [2018-01-27 23:03:19,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:03:19,489 INFO L93 Difference]: Finished difference Result 358 states and 366 transitions. [2018-01-27 23:03:19,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-27 23:03:19,490 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 323 [2018-01-27 23:03:19,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:03:19,491 INFO L225 Difference]: With dead ends: 358 [2018-01-27 23:03:19,491 INFO L226 Difference]: Without dead ends: 250 [2018-01-27 23:03:19,491 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-01-27 23:03:19,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-01-27 23:03:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2018-01-27 23:03:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-01-27 23:03:19,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 251 transitions. [2018-01-27 23:03:19,499 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 251 transitions. Word has length 323 [2018-01-27 23:03:19,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:03:19,499 INFO L432 AbstractCegarLoop]: Abstraction has 247 states and 251 transitions. [2018-01-27 23:03:19,499 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-01-27 23:03:19,499 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 251 transitions. [2018-01-27 23:03:19,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-01-27 23:03:19,501 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:03:19,502 INFO L330 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 24, 21, 21, 21, 21, 8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:03:19,502 INFO L371 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:03:19,502 INFO L82 PathProgramCache]: Analyzing trace with hash 719538760, now seen corresponding path program 26 times [2018-01-27 23:03:19,502 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:03:19,502 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:03:19,503 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:19,503 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 23:03:19,503 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:03:19,533 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:03:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3011 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-01-27 23:03:20,219 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:03:20,219 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:03:20,225 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 23:03:20,245 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:20,278 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:20,284 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:03:20,289 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:03:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3011 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-01-27 23:03:20,517 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:03:20,517 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-01-27 23:03:20,518 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-27 23:03:20,518 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-27 23:03:20,519 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-01-27 23:03:20,519 INFO L87 Difference]: Start difference. First operand 247 states and 251 transitions. Second operand 30 states. [2018-01-27 23:03:20,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:03:20,756 INFO L93 Difference]: Finished difference Result 363 states and 371 transitions. [2018-01-27 23:03:20,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-27 23:03:20,756 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 328 [2018-01-27 23:03:20,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:03:20,757 INFO L225 Difference]: With dead ends: 363 [2018-01-27 23:03:20,757 INFO L226 Difference]: Without dead ends: 255 [2018-01-27 23:03:20,758 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-01-27 23:03:20,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-01-27 23:03:20,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2018-01-27 23:03:20,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-01-27 23:03:20,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 256 transitions. [2018-01-27 23:03:20,765 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 256 transitions. Word has length 328 [2018-01-27 23:03:20,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:03:20,765 INFO L432 AbstractCegarLoop]: Abstraction has 252 states and 256 transitions. [2018-01-27 23:03:20,765 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-27 23:03:20,766 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 256 transitions. [2018-01-27 23:03:20,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-01-27 23:03:20,769 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:03:20,769 INFO L330 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 24, 21, 21, 21, 21, 8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:03:20,769 INFO L371 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:03:20,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1593208711, now seen corresponding path program 27 times [2018-01-27 23:03:20,770 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:03:20,770 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:03:20,770 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:20,771 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:03:20,771 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:03:20,801 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:03:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3143 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-01-27 23:03:21,432 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:03:21,432 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:03:21,438 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 23:03:21,458 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:03:21,463 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:03:21,467 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:03:21,472 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:03:21,478 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:03:21,486 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:03:21,521 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:03:21,592 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 23:03:21,593 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:03:21,596 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:03:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3143 backedges. 556 proven. 119 refuted. 0 times theorem prover too weak. 2468 trivial. 0 not checked. [2018-01-27 23:03:22,555 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:03:22,555 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 10] total 38 [2018-01-27 23:03:22,556 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-01-27 23:03:22,556 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-01-27 23:03:22,557 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=927, Unknown=0, NotChecked=0, Total=1406 [2018-01-27 23:03:22,557 INFO L87 Difference]: Start difference. First operand 252 states and 256 transitions. Second operand 38 states. [2018-01-27 23:03:22,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:03:22,854 INFO L93 Difference]: Finished difference Result 376 states and 388 transitions. [2018-01-27 23:03:22,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-01-27 23:03:22,855 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 333 [2018-01-27 23:03:22,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:03:22,856 INFO L225 Difference]: With dead ends: 376 [2018-01-27 23:03:22,856 INFO L226 Difference]: Without dead ends: 268 [2018-01-27 23:03:22,857 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=479, Invalid=927, Unknown=0, NotChecked=0, Total=1406 [2018-01-27 23:03:22,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-01-27 23:03:22,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 262. [2018-01-27 23:03:22,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-01-27 23:03:22,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 266 transitions. [2018-01-27 23:03:22,861 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 266 transitions. Word has length 333 [2018-01-27 23:03:22,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:03:22,862 INFO L432 AbstractCegarLoop]: Abstraction has 262 states and 266 transitions. [2018-01-27 23:03:22,862 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-01-27 23:03:22,862 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 266 transitions. [2018-01-27 23:03:22,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-01-27 23:03:22,864 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:03:22,864 INFO L330 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 27, 24, 24, 24, 24, 8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:03:22,864 INFO L371 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:03:22,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1233690958, now seen corresponding path program 28 times [2018-01-27 23:03:22,865 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:03:22,865 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:03:22,866 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:22,866 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:03:22,866 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:03:22,896 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:03:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3628 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2018-01-27 23:03:24,004 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:03:24,005 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:03:24,010 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 23:03:24,949 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:03:24,959 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:03:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3628 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2018-01-27 23:03:25,189 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:03:25,189 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-01-27 23:03:25,190 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-27 23:03:25,190 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-27 23:03:25,191 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-01-27 23:03:25,191 INFO L87 Difference]: Start difference. First operand 262 states and 266 transitions. Second operand 32 states. [2018-01-27 23:03:25,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:03:25,303 INFO L93 Difference]: Finished difference Result 383 states and 391 transitions. [2018-01-27 23:03:25,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-27 23:03:25,304 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 353 [2018-01-27 23:03:25,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:03:25,305 INFO L225 Difference]: With dead ends: 383 [2018-01-27 23:03:25,305 INFO L226 Difference]: Without dead ends: 270 [2018-01-27 23:03:25,306 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-01-27 23:03:25,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-01-27 23:03:25,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 267. [2018-01-27 23:03:25,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-01-27 23:03:25,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 271 transitions. [2018-01-27 23:03:25,314 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 271 transitions. Word has length 353 [2018-01-27 23:03:25,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:03:25,314 INFO L432 AbstractCegarLoop]: Abstraction has 267 states and 271 transitions. [2018-01-27 23:03:25,314 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-27 23:03:25,314 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 271 transitions. [2018-01-27 23:03:25,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-01-27 23:03:25,317 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:03:25,317 INFO L330 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 27, 24, 24, 24, 24, 8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:03:25,317 INFO L371 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:03:25,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1317665731, now seen corresponding path program 29 times [2018-01-27 23:03:25,317 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:03:25,318 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:03:25,321 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:25,321 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:03:25,321 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:03:25,355 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:03:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3770 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2018-01-27 23:03:26,311 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:03:26,311 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:03:26,317 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 23:03:26,334 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,336 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,337 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,338 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,340 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,342 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,345 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,348 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,351 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,355 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,359 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,366 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,377 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,384 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,396 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,406 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,417 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,429 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,451 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,629 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,722 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:26,887 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:27,423 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:27,835 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:28,709 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:29,810 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:33,291 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:34,541 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:37,606 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 23:03:37,610 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:03:37,619 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:03:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3770 backedges. 710 proven. 156 refuted. 0 times theorem prover too weak. 2904 trivial. 0 not checked. [2018-01-27 23:03:37,831 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:03:37,831 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 11] total 41 [2018-01-27 23:03:37,832 INFO L409 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-01-27 23:03:37,832 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-01-27 23:03:37,832 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2018-01-27 23:03:37,832 INFO L87 Difference]: Start difference. First operand 267 states and 271 transitions. Second operand 41 states. [2018-01-27 23:03:38,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:03:38,015 INFO L93 Difference]: Finished difference Result 396 states and 408 transitions. [2018-01-27 23:03:38,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-01-27 23:03:38,015 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 358 [2018-01-27 23:03:38,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:03:38,017 INFO L225 Difference]: With dead ends: 396 [2018-01-27 23:03:38,017 INFO L226 Difference]: Without dead ends: 283 [2018-01-27 23:03:38,018 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2018-01-27 23:03:38,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-01-27 23:03:38,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 277. [2018-01-27 23:03:38,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-01-27 23:03:38,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 281 transitions. [2018-01-27 23:03:38,026 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 281 transitions. Word has length 358 [2018-01-27 23:03:38,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:03:38,027 INFO L432 AbstractCegarLoop]: Abstraction has 277 states and 281 transitions. [2018-01-27 23:03:38,027 INFO L433 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-01-27 23:03:38,027 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 281 transitions. [2018-01-27 23:03:38,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-01-27 23:03:38,029 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:03:38,029 INFO L330 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 27, 27, 27, 27, 8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:03:38,029 INFO L371 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:03:38,030 INFO L82 PathProgramCache]: Analyzing trace with hash -968801208, now seen corresponding path program 30 times [2018-01-27 23:03:38,030 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:03:38,030 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:03:38,030 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:38,031 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:03:38,031 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:03:38,062 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 23:03:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4310 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 2075 trivial. 0 not checked. [2018-01-27 23:03:39,370 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 23:03:39,371 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-01-27 23:03:39,383 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 23:03:39,414 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:39,428 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:39,446 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:39,460 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:39,476 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:39,490 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:39,510 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:39,554 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:39,616 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:39,737 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:39,979 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:40,057 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:40,275 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:40,610 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:41,013 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:41,374 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:42,335 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 23:03:42,338 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 23:03:42,345 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 23:03:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4310 backedges. 894 proven. 140 refuted. 0 times theorem prover too weak. 3276 trivial. 0 not checked. [2018-01-27 23:03:42,584 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 23:03:42,584 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 10] total 41 [2018-01-27 23:03:42,585 INFO L409 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-01-27 23:03:42,585 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-01-27 23:03:42,586 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=1068, Unknown=0, NotChecked=0, Total=1640 [2018-01-27 23:03:42,586 INFO L87 Difference]: Start difference. First operand 277 states and 281 transitions. Second operand 41 states. [2018-01-27 23:03:42,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 23:03:42,828 INFO L93 Difference]: Finished difference Result 413 states and 422 transitions. [2018-01-27 23:03:42,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-01-27 23:03:42,828 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 378 [2018-01-27 23:03:42,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 23:03:42,829 INFO L225 Difference]: With dead ends: 413 [2018-01-27 23:03:42,829 INFO L226 Difference]: Without dead ends: 295 [2018-01-27 23:03:42,830 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=572, Invalid=1068, Unknown=0, NotChecked=0, Total=1640 [2018-01-27 23:03:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-01-27 23:03:42,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 288. [2018-01-27 23:03:42,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2018-01-27 23:03:42,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 292 transitions. [2018-01-27 23:03:42,837 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 292 transitions. Word has length 378 [2018-01-27 23:03:42,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 23:03:42,838 INFO L432 AbstractCegarLoop]: Abstraction has 288 states and 292 transitions. [2018-01-27 23:03:42,838 INFO L433 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-01-27 23:03:42,838 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 292 transitions. [2018-01-27 23:03:42,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2018-01-27 23:03:42,851 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 23:03:42,851 INFO L330 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 30, 27, 27, 27, 27, 9, 8, 8, 8, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 23:03:42,852 INFO L371 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-27 23:03:42,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1721704143, now seen corresponding path program 31 times [2018-01-27 23:03:42,852 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 23:03:42,852 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 23:03:42,853 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:42,853 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 23:03:42,853 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 23:03:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 23:03:42,889 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. Received shutdown request... [2018-01-27 23:03:43,139 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Timeout exceeded at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:265) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.access$1(Interpolator.java:263) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:132) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:220) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:201) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:915) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:192) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:199) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:222) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackTraceAbstractionRefinementStrategy.getTraceCheck(MultiTrackTraceAbstractionRefinementStrategy.java:218) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:231) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:205) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:381) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:316) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:115) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:117) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:324) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.runToolchainDefault(DefaultToolchainJob.java:221) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.BasicToolchainJob.run(BasicToolchainJob.java:134) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-01-27 23:03:43,144 INFO L168 Benchmark]: Toolchain (without parser) took 57426.50 ms. Allocated memory was 304.1 MB in the beginning and 1.1 GB in the end (delta: 791.7 MB). Free memory was 264.8 MB in the beginning and 580.6 MB in the end (delta: -315.8 MB). Peak memory consumption was 475.9 MB. Max. memory is 5.3 GB. [2018-01-27 23:03:43,145 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 304.1 MB. Free memory is still 269.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-27 23:03:43,146 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.10 ms. Allocated memory is still 304.1 MB. Free memory was 263.8 MB in the beginning and 255.8 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 5.3 GB. [2018-01-27 23:03:43,146 INFO L168 Benchmark]: Boogie Preprocessor took 60.61 ms. Allocated memory is still 304.1 MB. Free memory was 255.8 MB in the beginning and 253.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-27 23:03:43,146 INFO L168 Benchmark]: RCFGBuilder took 583.22 ms. Allocated memory is still 304.1 MB. Free memory was 253.8 MB in the beginning and 235.7 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 5.3 GB. [2018-01-27 23:03:43,147 INFO L168 Benchmark]: TraceAbstraction took 56504.92 ms. Allocated memory was 304.1 MB in the beginning and 1.1 GB in the end (delta: 791.7 MB). Free memory was 235.7 MB in the beginning and 580.6 MB in the end (delta: -344.9 MB). Peak memory consumption was 446.7 MB. Max. memory is 5.3 GB. [2018-01-27 23:03:43,151 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 304.1 MB. Free memory is still 269.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 268.10 ms. Allocated memory is still 304.1 MB. Free memory was 263.8 MB in the beginning and 255.8 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 60.61 ms. Allocated memory is still 304.1 MB. Free memory was 255.8 MB in the beginning and 253.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 583.22 ms. Allocated memory is still 304.1 MB. Free memory was 253.8 MB in the beginning and 235.7 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 5.3 GB. * TraceAbstraction took 56504.92 ms. Allocated memory was 304.1 MB in the beginning and 1.1 GB in the end (delta: 791.7 MB). Free memory was 235.7 MB in the beginning and 580.6 MB in the end (delta: -344.9 MB). Peak memory consumption was 446.7 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 54 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available - PositiveResult [Line: 4]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: avgErr0EnsuresViolation CFG has 4 procedures, 54 locations, 4 error locations. SAFE Result, 0.3s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 57 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 144 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available - ExceptionOrErrorResult: SMTLIBException: Timeout exceeded de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Timeout exceeded: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:265) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/avg60_true-unreach-call.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-27_23-03-43-166.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/avg60_true-unreach-call.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-27_23-03-43-166.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/avg60_true-unreach-call.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-27_23-03-43-166.csv Completed graceful shutdown