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/ldv-memsafety/memsetNonZero_true-valid-memsafety_true-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 14:44:58,407 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 14:44:58,409 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 14:44:58,421 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 14:44:58,422 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 14:44:58,423 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 14:44:58,424 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 14:44:58,426 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 14:44:58,428 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 14:44:58,428 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 14:44:58,429 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 14:44:58,429 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 14:44:58,430 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 14:44:58,430 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 14:44:58,431 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 14:44:58,434 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 14:44:58,436 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 14:44:58,438 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 14:44:58,439 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 14:44:58,440 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 14:44:58,443 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-23 14:44:58,443 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-23 14:44:58,443 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-23 14:44:58,444 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-23 14:44:58,445 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-23 14:44:58,446 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-23 14:44:58,446 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-23 14:44:58,447 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-23 14:44:58,447 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-23 14:44:58,447 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 14:44:58,448 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 14:44:58,448 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 [2018-01-23 14:44:58,458 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 14:44:58,459 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 14:44:58,459 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 14:44:58,460 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 14:44:58,460 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 14:44:58,460 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 14:44:58,460 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 14:44:58,461 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 14:44:58,461 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 14:44:58,461 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 14:44:58,461 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 14:44:58,462 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 14:44:58,462 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 14:44:58,462 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 14:44:58,462 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 14:44:58,462 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 14:44:58,463 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 14:44:58,463 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 14:44:58,463 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 14:44:58,463 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 14:44:58,463 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 14:44:58,464 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 14:44:58,464 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 14:44:58,464 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 14:44:58,464 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 14:44:58,465 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:44:58,465 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 14:44:58,465 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 14:44:58,465 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 14:44:58,465 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 14:44:58,466 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 14:44:58,466 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 14:44:58,466 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 14:44:58,466 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 14:44:58,466 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 14:44:58,467 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 14:44:58,467 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 14:44:58,501 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 14:44:58,514 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 14:44:58,518 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 14:44:58,520 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 14:44:58,520 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 14:44:58,521 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/memsetNonZero_true-valid-memsafety_true-termination.c [2018-01-23 14:44:58,654 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 14:44:58,658 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 14:44:58,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 14:44:58,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 14:44:58,664 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 14:44:58,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:44:58" (1/1) ... [2018-01-23 14:44:58,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ebb80cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:58, skipping insertion in model container [2018-01-23 14:44:58,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:44:58" (1/1) ... [2018-01-23 14:44:58,682 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:44:58,700 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:44:58,806 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:44:58,820 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:44:58,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:58 WrapperNode [2018-01-23 14:44:58,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 14:44:58,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 14:44:58,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 14:44:58,825 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 14:44:58,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:58" (1/1) ... [2018-01-23 14:44:58,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:58" (1/1) ... [2018-01-23 14:44:58,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:58" (1/1) ... [2018-01-23 14:44:58,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:58" (1/1) ... [2018-01-23 14:44:58,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:58" (1/1) ... [2018-01-23 14:44:58,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:58" (1/1) ... [2018-01-23 14:44:58,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:58" (1/1) ... [2018-01-23 14:44:58,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 14:44:58,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 14:44:58,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 14:44:58,853 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 14:44:58,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:58" (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 [2018-01-23 14:44:58,898 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 14:44:58,899 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 14:44:58,899 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 14:44:58,899 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 14:44:58,899 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 14:44:58,899 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 14:44:58,900 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-01-23 14:44:58,900 INFO L136 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-01-23 14:44:58,900 INFO L128 BoogieDeclarations]: Found specification of procedure memset [2018-01-23 14:44:58,900 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 14:44:58,900 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 14:44:58,900 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 14:44:59,017 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 14:44:59,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:44:59 BoogieIcfgContainer [2018-01-23 14:44:59,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 14:44:59,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-23 14:44:59,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-23 14:44:59,020 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-23 14:44:59,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 02:44:58" (1/3) ... [2018-01-23 14:44:59,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6ece3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:44:59, skipping insertion in model container [2018-01-23 14:44:59,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:58" (2/3) ... [2018-01-23 14:44:59,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6ece3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:44:59, skipping insertion in model container [2018-01-23 14:44:59,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:44:59" (3/3) ... [2018-01-23 14:44:59,024 INFO L105 eAbstractionObserver]: Analyzing ICFG memsetNonZero_true-valid-memsafety_true-termination.c [2018-01-23 14:44:59,031 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-23 14:44:59,036 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-23 14:44:59,077 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:44:59,077 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:44:59,077 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:44:59,077 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:44:59,078 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:44:59,078 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:44:59,078 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:44:59,078 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-23 14:44:59,079 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:44:59,100 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-01-23 14:44:59,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-23 14:44:59,108 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:59,109 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-23 14:44:59,109 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-23 14:44:59,114 INFO L82 PathProgramCache]: Analyzing trace with hash 50935, now seen corresponding path program 1 times [2018-01-23 14:44:59,116 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:59,116 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:59,173 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:59,173 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:59,173 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:44:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:44:59,241 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:44:59,249 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:44:59,256 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:44:59,257 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:44:59,257 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:44:59,257 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:44:59,257 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:44:59,257 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:44:59,257 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:44:59,257 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-23 14:44:59,258 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:44:59,259 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-01-23 14:44:59,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-23 14:44:59,260 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:59,260 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:59,260 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:59,261 INFO L82 PathProgramCache]: Analyzing trace with hash 457189328, now seen corresponding path program 1 times [2018-01-23 14:44:59,261 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:59,261 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:59,262 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:59,263 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:59,263 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:59,300 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:59,401 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:44:59,401 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-23 14:44:59,403 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-23 14:44:59,419 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-23 14:44:59,420 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-23 14:44:59,423 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 4 states. [2018-01-23 14:44:59,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:59,474 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-01-23 14:44:59,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-23 14:44:59,475 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-01-23 14:44:59,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:59,483 INFO L225 Difference]: With dead ends: 33 [2018-01-23 14:44:59,484 INFO L226 Difference]: Without dead ends: 19 [2018-01-23 14:44:59,548 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:44:59,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-01-23 14:44:59,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-01-23 14:44:59,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-01-23 14:44:59,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-01-23 14:44:59,577 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-01-23 14:44:59,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:59,577 INFO L432 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-01-23 14:44:59,577 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-23 14:44:59,577 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-01-23 14:44:59,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-23 14:44:59,578 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:59,578 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:59,578 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:59,578 INFO L82 PathProgramCache]: Analyzing trace with hash -114007861, now seen corresponding path program 1 times [2018-01-23 14:44:59,578 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:59,579 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:59,579 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:59,580 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:59,580 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:59,597 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:59,659 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:59,659 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 [2018-01-23 14:44:59,668 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:59,692 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:59,818 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:59,819 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-01-23 14:44:59,819 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-23 14:44:59,820 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-23 14:44:59,820 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-23 14:44:59,820 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 8 states. [2018-01-23 14:44:59,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:59,856 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-01-23 14:44:59,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:44:59,857 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2018-01-23 14:44:59,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:59,858 INFO L225 Difference]: With dead ends: 29 [2018-01-23 14:44:59,858 INFO L226 Difference]: Without dead ends: 20 [2018-01-23 14:44:59,859 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-01-23 14:44:59,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-01-23 14:44:59,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-01-23 14:44:59,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-01-23 14:44:59,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-01-23 14:44:59,863 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-01-23 14:44:59,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:59,864 INFO L432 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-01-23 14:44:59,864 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-23 14:44:59,864 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-01-23 14:44:59,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-23 14:44:59,865 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:59,865 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:59,865 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:59,865 INFO L82 PathProgramCache]: Analyzing trace with hash -641251536, now seen corresponding path program 2 times [2018-01-23 14:44:59,865 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:59,866 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:59,867 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:59,867 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:59,867 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:59,883 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:59,975 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:59,975 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 [2018-01-23 14:44:59,983 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:59,996 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:59,999 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:59,999 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:00,003 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:00,059 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:00,059 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-01-23 14:45:00,060 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:45:00,060 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:45:00,060 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:45:00,060 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 10 states. [2018-01-23 14:45:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:00,109 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-01-23 14:45:00,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-23 14:45:00,110 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-01-23 14:45:00,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:00,110 INFO L225 Difference]: With dead ends: 30 [2018-01-23 14:45:00,111 INFO L226 Difference]: Without dead ends: 21 [2018-01-23 14:45:00,111 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-01-23 14:45:00,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-01-23 14:45:00,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-01-23 14:45:00,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-01-23 14:45:00,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-01-23 14:45:00,115 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-01-23 14:45:00,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:00,116 INFO L432 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-01-23 14:45:00,116 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:45:00,116 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-01-23 14:45:00,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-23 14:45:00,117 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:00,117 INFO L322 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:00,117 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:00,117 INFO L82 PathProgramCache]: Analyzing trace with hash 194063723, now seen corresponding path program 3 times [2018-01-23 14:45:00,117 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:00,117 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:00,119 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:00,119 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:00,119 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:00,133 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:00,235 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:00,235 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:00,248 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:45:00,261 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:00,264 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:00,265 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:00,270 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:00,272 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:00,335 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:00,336 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-01-23 14:45:00,336 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-23 14:45:00,336 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-23 14:45:00,337 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2018-01-23 14:45:00,337 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2018-01-23 14:45:00,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:00,380 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-01-23 14:45:00,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-23 14:45:00,381 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2018-01-23 14:45:00,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:00,382 INFO L225 Difference]: With dead ends: 31 [2018-01-23 14:45:00,382 INFO L226 Difference]: Without dead ends: 22 [2018-01-23 14:45:00,383 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-01-23 14:45:00,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-01-23 14:45:00,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-01-23 14:45:00,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-01-23 14:45:00,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-01-23 14:45:00,387 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-01-23 14:45:00,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:00,387 INFO L432 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-01-23 14:45:00,388 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-23 14:45:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-01-23 14:45:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-23 14:45:00,389 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:00,389 INFO L322 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:00,389 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:00,389 INFO L82 PathProgramCache]: Analyzing trace with hash 319032976, now seen corresponding path program 4 times [2018-01-23 14:45:00,389 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:00,389 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:00,390 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:00,391 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:00,391 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:00,405 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:00,582 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:00,582 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 [2018-01-23 14:45:00,594 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:45:00,610 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:00,613 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:00,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:00,696 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:00,697 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-01-23 14:45:00,697 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-23 14:45:00,697 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-23 14:45:00,697 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:45:00,698 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2018-01-23 14:45:00,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:00,723 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-01-23 14:45:00,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-23 14:45:00,723 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2018-01-23 14:45:00,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:00,724 INFO L225 Difference]: With dead ends: 32 [2018-01-23 14:45:00,724 INFO L226 Difference]: Without dead ends: 23 [2018-01-23 14:45:00,725 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-01-23 14:45:00,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-01-23 14:45:00,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-01-23 14:45:00,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-01-23 14:45:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-01-23 14:45:00,728 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-01-23 14:45:00,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:00,728 INFO L432 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-01-23 14:45:00,728 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-23 14:45:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-01-23 14:45:00,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-23 14:45:00,729 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:00,729 INFO L322 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:00,729 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:00,729 INFO L82 PathProgramCache]: Analyzing trace with hash -101887477, now seen corresponding path program 5 times [2018-01-23 14:45:00,729 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:00,730 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:00,730 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:00,730 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:00,730 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:00,743 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:00,817 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:00,817 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 [2018-01-23 14:45:00,824 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:45:00,829 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:00,831 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:00,832 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:00,837 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:00,838 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:00,839 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:00,926 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:00,926 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-01-23 14:45:00,926 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-23 14:45:00,926 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-23 14:45:00,927 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-01-23 14:45:00,927 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 16 states. [2018-01-23 14:45:00,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:00,968 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-01-23 14:45:00,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-23 14:45:00,968 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2018-01-23 14:45:00,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:00,969 INFO L225 Difference]: With dead ends: 33 [2018-01-23 14:45:00,969 INFO L226 Difference]: Without dead ends: 24 [2018-01-23 14:45:00,969 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2018-01-23 14:45:00,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-01-23 14:45:00,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-01-23 14:45:00,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-01-23 14:45:00,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-01-23 14:45:00,972 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-01-23 14:45:00,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:00,972 INFO L432 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-01-23 14:45:00,972 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-23 14:45:00,972 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-01-23 14:45:00,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-23 14:45:00,973 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:00,973 INFO L322 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:00,973 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:00,974 INFO L82 PathProgramCache]: Analyzing trace with hash -265519632, now seen corresponding path program 6 times [2018-01-23 14:45:00,974 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:00,974 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:00,975 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:00,975 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:00,975 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:00,987 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:01,088 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:01,088 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 [2018-01-23 14:45:01,095 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:45:01,104 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:01,107 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:01,108 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:01,109 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:01,110 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:01,111 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:01,176 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:01,176 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-01-23 14:45:01,176 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-23 14:45:01,177 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-23 14:45:01,177 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2018-01-23 14:45:01,177 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 18 states. [2018-01-23 14:45:01,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:01,247 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-01-23 14:45:01,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-23 14:45:01,248 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2018-01-23 14:45:01,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:01,248 INFO L225 Difference]: With dead ends: 34 [2018-01-23 14:45:01,248 INFO L226 Difference]: Without dead ends: 25 [2018-01-23 14:45:01,249 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2018-01-23 14:45:01,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-01-23 14:45:01,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-01-23 14:45:01,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-01-23 14:45:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-01-23 14:45:01,253 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-01-23 14:45:01,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:01,254 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-01-23 14:45:01,254 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-23 14:45:01,254 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-01-23 14:45:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-23 14:45:01,255 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:01,255 INFO L322 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:01,255 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:01,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1043149141, now seen corresponding path program 7 times [2018-01-23 14:45:01,256 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:01,256 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:01,257 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:01,257 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:01,257 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:01,270 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:01,402 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:01,402 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 [2018-01-23 14:45:01,408 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:45:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:01,422 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:01,532 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:01,532 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-01-23 14:45:01,532 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-23 14:45:01,532 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-23 14:45:01,533 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=229, Unknown=0, NotChecked=0, Total=380 [2018-01-23 14:45:01,533 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 20 states. [2018-01-23 14:45:01,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:01,606 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-01-23 14:45:01,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-23 14:45:01,608 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2018-01-23 14:45:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:01,609 INFO L225 Difference]: With dead ends: 35 [2018-01-23 14:45:01,609 INFO L226 Difference]: Without dead ends: 26 [2018-01-23 14:45:01,610 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2018-01-23 14:45:01,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-01-23 14:45:01,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-01-23 14:45:01,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-01-23 14:45:01,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-01-23 14:45:01,614 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-01-23 14:45:01,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:01,615 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-01-23 14:45:01,615 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-23 14:45:01,615 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-01-23 14:45:01,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-23 14:45:01,616 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:01,616 INFO L322 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:01,616 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:01,616 INFO L82 PathProgramCache]: Analyzing trace with hash 620139856, now seen corresponding path program 8 times [2018-01-23 14:45:01,616 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:01,616 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:01,617 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:01,617 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:45:01,618 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:01,630 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:01,828 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:01,829 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 [2018-01-23 14:45:01,838 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:45:01,846 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:01,849 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:01,850 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:01,853 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:01,985 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:01,985 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-01-23 14:45:01,986 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-23 14:45:01,986 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-23 14:45:01,986 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-01-23 14:45:01,986 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 22 states. [2018-01-23 14:45:02,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:02,110 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-01-23 14:45:02,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-23 14:45:02,111 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2018-01-23 14:45:02,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:02,112 INFO L225 Difference]: With dead ends: 36 [2018-01-23 14:45:02,112 INFO L226 Difference]: Without dead ends: 27 [2018-01-23 14:45:02,113 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2018-01-23 14:45:02,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-01-23 14:45:02,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-01-23 14:45:02,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-01-23 14:45:02,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-01-23 14:45:02,117 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-01-23 14:45:02,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:02,117 INFO L432 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-01-23 14:45:02,117 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-23 14:45:02,117 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-01-23 14:45:02,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-23 14:45:02,118 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:02,118 INFO L322 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:02,118 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:02,118 INFO L82 PathProgramCache]: Analyzing trace with hash 642491211, now seen corresponding path program 9 times [2018-01-23 14:45:02,118 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:02,118 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:02,119 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:02,119 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:02,119 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:02,131 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:02,311 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:02,311 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 [2018-01-23 14:45:02,323 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:45:02,333 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:02,335 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:02,336 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:02,337 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:02,341 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:02,342 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:02,342 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:02,344 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:02,470 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:02,470 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2018-01-23 14:45:02,470 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-23 14:45:02,471 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-23 14:45:02,471 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2018-01-23 14:45:02,471 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 24 states. [2018-01-23 14:45:02,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:02,522 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-01-23 14:45:02,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-23 14:45:02,523 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2018-01-23 14:45:02,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:02,523 INFO L225 Difference]: With dead ends: 37 [2018-01-23 14:45:02,523 INFO L226 Difference]: Without dead ends: 28 [2018-01-23 14:45:02,524 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=368, Unknown=0, NotChecked=0, Total=600 [2018-01-23 14:45:02,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-01-23 14:45:02,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-01-23 14:45:02,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-01-23 14:45:02,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-01-23 14:45:02,528 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-01-23 14:45:02,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:02,528 INFO L432 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-01-23 14:45:02,528 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-23 14:45:02,528 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-01-23 14:45:02,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-23 14:45:02,529 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:02,529 INFO L322 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:02,529 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:02,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1335383216, now seen corresponding path program 10 times [2018-01-23 14:45:02,530 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:02,530 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:02,531 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:02,531 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:02,531 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:02,541 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:02,646 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:02,646 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 [2018-01-23 14:45:02,651 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:45:02,662 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:02,663 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:02,756 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:02,756 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2018-01-23 14:45:02,756 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-23 14:45:02,757 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-23 14:45:02,757 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=394, Unknown=0, NotChecked=0, Total=650 [2018-01-23 14:45:02,757 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 26 states. [2018-01-23 14:45:02,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:02,791 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-01-23 14:45:02,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-23 14:45:02,791 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 27 [2018-01-23 14:45:02,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:02,792 INFO L225 Difference]: With dead ends: 38 [2018-01-23 14:45:02,792 INFO L226 Difference]: Without dead ends: 29 [2018-01-23 14:45:02,793 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=271, Invalid=431, Unknown=0, NotChecked=0, Total=702 [2018-01-23 14:45:02,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-01-23 14:45:02,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-01-23 14:45:02,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-01-23 14:45:02,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-01-23 14:45:02,797 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-01-23 14:45:02,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:02,797 INFO L432 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-01-23 14:45:02,797 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-23 14:45:02,797 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-01-23 14:45:02,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-23 14:45:02,798 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:02,798 INFO L322 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:02,798 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:02,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1340198891, now seen corresponding path program 11 times [2018-01-23 14:45:02,799 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:02,799 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:02,799 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:02,800 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:02,800 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:02,810 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:02,959 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:02,959 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 [2018-01-23 14:45:02,964 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:45:02,968 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:02,969 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:02,969 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:02,970 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:02,971 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:02,972 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:02,976 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:02,977 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:02,979 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:03,097 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:03,097 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2018-01-23 14:45:03,098 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-23 14:45:03,098 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-23 14:45:03,098 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=459, Unknown=0, NotChecked=0, Total=756 [2018-01-23 14:45:03,098 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-01-23 14:45:03,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:03,135 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-01-23 14:45:03,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-23 14:45:03,136 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-01-23 14:45:03,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:03,136 INFO L225 Difference]: With dead ends: 39 [2018-01-23 14:45:03,136 INFO L226 Difference]: Without dead ends: 30 [2018-01-23 14:45:03,137 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2018-01-23 14:45:03,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-01-23 14:45:03,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-01-23 14:45:03,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-01-23 14:45:03,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-01-23 14:45:03,139 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-01-23 14:45:03,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:03,140 INFO L432 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-01-23 14:45:03,140 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-23 14:45:03,140 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-01-23 14:45:03,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-23 14:45:03,140 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:03,140 INFO L322 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:03,140 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:03,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1489484816, now seen corresponding path program 12 times [2018-01-23 14:45:03,141 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:03,141 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:03,141 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:03,141 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:03,141 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:03,151 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:03,470 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:03,470 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 [2018-01-23 14:45:03,478 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:45:03,486 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:03,488 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:03,490 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:03,491 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:03,492 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:03,497 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:03,498 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:03,502 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:03,504 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:03,744 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:03,745 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2018-01-23 14:45:03,745 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-23 14:45:03,745 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-23 14:45:03,745 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=529, Unknown=0, NotChecked=0, Total=870 [2018-01-23 14:45:03,745 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-01-23 14:45:03,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:03,794 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-01-23 14:45:03,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-23 14:45:03,794 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-01-23 14:45:03,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:03,795 INFO L225 Difference]: With dead ends: 40 [2018-01-23 14:45:03,795 INFO L226 Difference]: Without dead ends: 31 [2018-01-23 14:45:03,795 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=358, Invalid=572, Unknown=0, NotChecked=0, Total=930 [2018-01-23 14:45:03,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-01-23 14:45:03,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-01-23 14:45:03,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-01-23 14:45:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-01-23 14:45:03,800 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-01-23 14:45:03,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:03,800 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-01-23 14:45:03,800 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-23 14:45:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-01-23 14:45:03,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-23 14:45:03,801 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:03,801 INFO L322 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:03,801 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:03,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1822381195, now seen corresponding path program 13 times [2018-01-23 14:45:03,801 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:03,802 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:03,802 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:03,803 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:03,803 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:03,812 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:03,982 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:03,982 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 [2018-01-23 14:45:03,987 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:45:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:04,013 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:04,183 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:04,183 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2018-01-23 14:45:04,183 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-23 14:45:04,184 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-23 14:45:04,184 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=604, Unknown=0, NotChecked=0, Total=992 [2018-01-23 14:45:04,184 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 32 states. [2018-01-23 14:45:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:04,266 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-01-23 14:45:04,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-23 14:45:04,266 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 30 [2018-01-23 14:45:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:04,267 INFO L225 Difference]: With dead ends: 41 [2018-01-23 14:45:04,267 INFO L226 Difference]: Without dead ends: 32 [2018-01-23 14:45:04,268 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=650, Unknown=0, NotChecked=0, Total=1056 [2018-01-23 14:45:04,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-01-23 14:45:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-01-23 14:45:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-01-23 14:45:04,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-01-23 14:45:04,271 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-01-23 14:45:04,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:04,271 INFO L432 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-01-23 14:45:04,278 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-23 14:45:04,278 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-01-23 14:45:04,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-23 14:45:04,279 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:04,280 INFO L322 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:04,280 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:04,280 INFO L82 PathProgramCache]: Analyzing trace with hash -742732944, now seen corresponding path program 14 times [2018-01-23 14:45:04,280 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:04,280 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:04,281 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:04,281 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:45:04,281 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:04,289 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:04,536 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:04,536 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 [2018-01-23 14:45:04,541 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:45:04,548 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:04,551 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:04,552 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:04,554 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:04,682 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:04,682 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2018-01-23 14:45:04,682 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-23 14:45:04,683 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-23 14:45:04,683 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=684, Unknown=0, NotChecked=0, Total=1122 [2018-01-23 14:45:04,683 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 34 states. [2018-01-23 14:45:04,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:04,735 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-01-23 14:45:04,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-23 14:45:04,743 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 31 [2018-01-23 14:45:04,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:04,744 INFO L225 Difference]: With dead ends: 42 [2018-01-23 14:45:04,744 INFO L226 Difference]: Without dead ends: 33 [2018-01-23 14:45:04,745 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=733, Unknown=0, NotChecked=0, Total=1190 [2018-01-23 14:45:04,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-01-23 14:45:04,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-01-23 14:45:04,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-01-23 14:45:04,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-01-23 14:45:04,749 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-01-23 14:45:04,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:04,749 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-01-23 14:45:04,749 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-23 14:45:04,749 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-01-23 14:45:04,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-23 14:45:04,754 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:04,754 INFO L322 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:04,755 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:04,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1343107371, now seen corresponding path program 15 times [2018-01-23 14:45:04,755 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:04,755 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:04,756 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:04,756 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:04,756 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:04,766 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:04,990 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:04,990 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 [2018-01-23 14:45:04,998 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:45:05,006 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:05,008 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:05,010 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:05,011 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:05,012 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:05,018 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:05,019 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:05,023 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:05,024 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:05,024 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:05,026 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:05,227 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:05,228 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2018-01-23 14:45:05,228 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-23 14:45:05,228 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-23 14:45:05,229 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=769, Unknown=0, NotChecked=0, Total=1260 [2018-01-23 14:45:05,229 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 36 states. [2018-01-23 14:45:05,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:05,349 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-01-23 14:45:05,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-23 14:45:05,349 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 32 [2018-01-23 14:45:05,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:05,350 INFO L225 Difference]: With dead ends: 43 [2018-01-23 14:45:05,350 INFO L226 Difference]: Without dead ends: 34 [2018-01-23 14:45:05,351 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=511, Invalid=821, Unknown=0, NotChecked=0, Total=1332 [2018-01-23 14:45:05,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-01-23 14:45:05,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-01-23 14:45:05,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-01-23 14:45:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-01-23 14:45:05,355 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-01-23 14:45:05,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:05,356 INFO L432 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-01-23 14:45:05,356 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-23 14:45:05,356 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-01-23 14:45:05,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-23 14:45:05,356 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:05,357 INFO L322 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:05,357 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:05,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1579647696, now seen corresponding path program 16 times [2018-01-23 14:45:05,357 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:05,357 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:05,358 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:05,358 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:05,358 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:05,368 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:05,575 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:05,575 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 [2018-01-23 14:45:05,581 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:45:05,593 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:05,595 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:05,781 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:05,781 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2018-01-23 14:45:05,781 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-01-23 14:45:05,782 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-01-23 14:45:05,782 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=859, Unknown=0, NotChecked=0, Total=1406 [2018-01-23 14:45:05,782 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 38 states. [2018-01-23 14:45:05,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:05,833 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-01-23 14:45:05,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-23 14:45:05,833 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 33 [2018-01-23 14:45:05,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:05,834 INFO L225 Difference]: With dead ends: 44 [2018-01-23 14:45:05,834 INFO L226 Difference]: Without dead ends: 35 [2018-01-23 14:45:05,834 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=568, Invalid=914, Unknown=0, NotChecked=0, Total=1482 [2018-01-23 14:45:05,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-01-23 14:45:05,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-01-23 14:45:05,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-23 14:45:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-01-23 14:45:05,837 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-01-23 14:45:05,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:05,837 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-01-23 14:45:05,837 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-01-23 14:45:05,837 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-01-23 14:45:05,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-23 14:45:05,838 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:05,838 INFO L322 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:05,838 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:05,838 INFO L82 PathProgramCache]: Analyzing trace with hash 322463179, now seen corresponding path program 17 times [2018-01-23 14:45:05,838 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:05,838 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:05,838 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:05,839 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:05,839 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:05,848 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:06,092 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:06,092 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 [2018-01-23 14:45:06,101 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:45:06,104 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:06,105 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:06,106 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:06,107 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:06,108 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:06,109 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:06,110 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:06,110 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:06,111 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:06,115 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:06,116 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:06,117 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:06,361 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:06,361 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2018-01-23 14:45:06,361 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-23 14:45:06,362 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-23 14:45:06,362 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=954, Unknown=0, NotChecked=0, Total=1560 [2018-01-23 14:45:06,362 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 40 states. [2018-01-23 14:45:06,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:06,410 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-01-23 14:45:06,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-23 14:45:06,411 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 34 [2018-01-23 14:45:06,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:06,411 INFO L225 Difference]: With dead ends: 45 [2018-01-23 14:45:06,411 INFO L226 Difference]: Without dead ends: 36 [2018-01-23 14:45:06,412 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=628, Invalid=1012, Unknown=0, NotChecked=0, Total=1640 [2018-01-23 14:45:06,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-23 14:45:06,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-23 14:45:06,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-23 14:45:06,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-01-23 14:45:06,416 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-01-23 14:45:06,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:06,416 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-01-23 14:45:06,416 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-23 14:45:06,416 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-01-23 14:45:06,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-23 14:45:06,417 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:06,417 INFO L322 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:06,417 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:06,417 INFO L82 PathProgramCache]: Analyzing trace with hash 4448816, now seen corresponding path program 18 times [2018-01-23 14:45:06,417 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:06,417 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:06,418 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:06,418 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:06,418 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:06,427 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:06,686 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:06,686 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 [2018-01-23 14:45:06,694 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:45:06,702 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:06,704 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:06,705 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:06,707 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:06,708 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:06,709 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:06,710 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:06,711 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:06,713 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:06,714 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:06,714 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:06,716 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:06,971 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:06,971 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2018-01-23 14:45:06,972 INFO L409 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-01-23 14:45:06,972 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-01-23 14:45:06,972 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=1054, Unknown=0, NotChecked=0, Total=1722 [2018-01-23 14:45:06,972 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 42 states. [2018-01-23 14:45:07,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:07,021 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-01-23 14:45:07,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-23 14:45:07,022 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 35 [2018-01-23 14:45:07,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:07,023 INFO L225 Difference]: With dead ends: 46 [2018-01-23 14:45:07,023 INFO L226 Difference]: Without dead ends: 37 [2018-01-23 14:45:07,024 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=691, Invalid=1115, Unknown=0, NotChecked=0, Total=1806 [2018-01-23 14:45:07,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-23 14:45:07,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-23 14:45:07,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-23 14:45:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-01-23 14:45:07,028 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-01-23 14:45:07,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:07,028 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-01-23 14:45:07,028 INFO L433 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-01-23 14:45:07,028 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-01-23 14:45:07,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-23 14:45:07,029 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:07,029 INFO L322 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:07,029 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:07,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1264061845, now seen corresponding path program 19 times [2018-01-23 14:45:07,029 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:07,029 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:07,030 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:07,030 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:07,030 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:07,040 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:07,706 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:07,706 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 [2018-01-23 14:45:07,714 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:45:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:07,728 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:07,922 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:07,922 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2018-01-23 14:45:07,922 INFO L409 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-01-23 14:45:07,922 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-01-23 14:45:07,923 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=1159, Unknown=0, NotChecked=0, Total=1892 [2018-01-23 14:45:07,923 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 44 states. [2018-01-23 14:45:07,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:07,994 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-01-23 14:45:07,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-23 14:45:07,995 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 36 [2018-01-23 14:45:07,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:07,995 INFO L225 Difference]: With dead ends: 47 [2018-01-23 14:45:07,996 INFO L226 Difference]: Without dead ends: 38 [2018-01-23 14:45:07,996 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=757, Invalid=1223, Unknown=0, NotChecked=0, Total=1980 [2018-01-23 14:45:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-01-23 14:45:07,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-01-23 14:45:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-23 14:45:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-01-23 14:45:08,000 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-01-23 14:45:08,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:08,000 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-01-23 14:45:08,000 INFO L433 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-01-23 14:45:08,000 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-01-23 14:45:08,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-23 14:45:08,001 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:08,001 INFO L322 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:08,001 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:08,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1933186672, now seen corresponding path program 20 times [2018-01-23 14:45:08,002 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:08,002 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:08,002 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:08,003 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:45:08,003 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:08,013 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:08,323 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:08,323 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 [2018-01-23 14:45:08,330 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:45:08,338 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:08,343 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:08,351 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:08,353 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:08,583 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:08,583 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2018-01-23 14:45:08,583 INFO L409 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-01-23 14:45:08,584 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-01-23 14:45:08,584 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=801, Invalid=1269, Unknown=0, NotChecked=0, Total=2070 [2018-01-23 14:45:08,584 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 46 states. [2018-01-23 14:45:08,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:08,632 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-01-23 14:45:08,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-23 14:45:08,632 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 37 [2018-01-23 14:45:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:08,633 INFO L225 Difference]: With dead ends: 48 [2018-01-23 14:45:08,633 INFO L226 Difference]: Without dead ends: 39 [2018-01-23 14:45:08,633 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=826, Invalid=1336, Unknown=0, NotChecked=0, Total=2162 [2018-01-23 14:45:08,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-23 14:45:08,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-23 14:45:08,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-23 14:45:08,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-01-23 14:45:08,636 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-01-23 14:45:08,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:08,636 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-01-23 14:45:08,636 INFO L433 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-01-23 14:45:08,636 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-01-23 14:45:08,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-23 14:45:08,636 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:08,636 INFO L322 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:08,637 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:08,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1201219829, now seen corresponding path program 21 times [2018-01-23 14:45:08,637 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:08,637 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:08,637 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:08,637 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:08,638 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:08,646 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:08,915 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:08,915 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 [2018-01-23 14:45:08,920 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:45:08,927 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:08,929 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:08,930 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:08,931 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:08,932 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:08,933 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:08,934 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:08,935 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:08,936 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:08,937 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:08,938 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:08,939 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:08,939 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:08,941 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:09,144 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:09,144 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2018-01-23 14:45:09,145 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-01-23 14:45:09,145 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-01-23 14:45:09,146 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=872, Invalid=1384, Unknown=0, NotChecked=0, Total=2256 [2018-01-23 14:45:09,146 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 48 states. [2018-01-23 14:45:09,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:09,206 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-01-23 14:45:09,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-23 14:45:09,206 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 38 [2018-01-23 14:45:09,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:09,207 INFO L225 Difference]: With dead ends: 49 [2018-01-23 14:45:09,207 INFO L226 Difference]: Without dead ends: 40 [2018-01-23 14:45:09,208 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=898, Invalid=1454, Unknown=0, NotChecked=0, Total=2352 [2018-01-23 14:45:09,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-23 14:45:09,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-01-23 14:45:09,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-23 14:45:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-01-23 14:45:09,210 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-01-23 14:45:09,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:09,210 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-01-23 14:45:09,211 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-01-23 14:45:09,211 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-01-23 14:45:09,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-23 14:45:09,211 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:09,211 INFO L322 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:09,211 INFO L371 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:09,211 INFO L82 PathProgramCache]: Analyzing trace with hash 14915824, now seen corresponding path program 22 times [2018-01-23 14:45:09,211 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:09,211 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:09,212 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:09,212 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:09,212 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:09,218 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:09,460 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:09,460 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 [2018-01-23 14:45:09,466 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:45:09,478 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:09,479 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:09,730 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:09,731 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2018-01-23 14:45:09,731 INFO L409 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-01-23 14:45:09,731 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-01-23 14:45:09,732 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=1504, Unknown=0, NotChecked=0, Total=2450 [2018-01-23 14:45:09,732 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 50 states. [2018-01-23 14:45:09,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:09,799 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-01-23 14:45:09,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-23 14:45:09,800 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 39 [2018-01-23 14:45:09,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:09,800 INFO L225 Difference]: With dead ends: 50 [2018-01-23 14:45:09,800 INFO L226 Difference]: Without dead ends: 41 [2018-01-23 14:45:09,801 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=973, Invalid=1577, Unknown=0, NotChecked=0, Total=2550 [2018-01-23 14:45:09,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-23 14:45:09,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-23 14:45:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-23 14:45:09,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-01-23 14:45:09,805 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-01-23 14:45:09,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:09,806 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-01-23 14:45:09,806 INFO L433 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-01-23 14:45:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-01-23 14:45:09,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-01-23 14:45:09,806 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:09,806 INFO L322 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:09,806 INFO L371 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:09,806 INFO L82 PathProgramCache]: Analyzing trace with hash -939584597, now seen corresponding path program 23 times [2018-01-23 14:45:09,806 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:09,807 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:09,807 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:09,807 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:09,807 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:09,814 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:10,096 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:10,096 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 [2018-01-23 14:45:10,101 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:45:10,104 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:10,105 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:10,106 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:10,107 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:10,108 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:10,108 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:10,109 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:10,110 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:10,111 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:10,112 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:10,113 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:10,113 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:10,117 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:10,118 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:10,120 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:10,380 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:10,381 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2018-01-23 14:45:10,381 INFO L409 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-01-23 14:45:10,381 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-01-23 14:45:10,382 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=1629, Unknown=0, NotChecked=0, Total=2652 [2018-01-23 14:45:10,382 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 52 states. [2018-01-23 14:45:10,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:10,449 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-01-23 14:45:10,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-23 14:45:10,449 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 40 [2018-01-23 14:45:10,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:10,450 INFO L225 Difference]: With dead ends: 51 [2018-01-23 14:45:10,450 INFO L226 Difference]: Without dead ends: 42 [2018-01-23 14:45:10,450 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1051, Invalid=1705, Unknown=0, NotChecked=0, Total=2756 [2018-01-23 14:45:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-01-23 14:45:10,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-01-23 14:45:10,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-23 14:45:10,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-01-23 14:45:10,453 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-01-23 14:45:10,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:10,453 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-01-23 14:45:10,453 INFO L433 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-01-23 14:45:10,453 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-01-23 14:45:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-23 14:45:10,453 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:10,453 INFO L322 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:10,453 INFO L371 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:10,454 INFO L82 PathProgramCache]: Analyzing trace with hash -464326576, now seen corresponding path program 24 times [2018-01-23 14:45:10,454 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:10,454 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:10,454 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:10,454 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:10,454 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:10,462 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:10,793 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:10,794 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 [2018-01-23 14:45:10,799 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:45:10,806 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:10,809 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:10,811 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:10,812 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:10,814 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:10,815 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:10,816 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:10,818 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:10,819 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:10,821 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:10,822 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:10,824 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:10,825 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:10,826 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:10,827 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:11,073 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:11,073 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2018-01-23 14:45:11,073 INFO L409 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-01-23 14:45:11,073 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-01-23 14:45:11,074 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1103, Invalid=1759, Unknown=0, NotChecked=0, Total=2862 [2018-01-23 14:45:11,074 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 54 states. [2018-01-23 14:45:11,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:11,135 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-01-23 14:45:11,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-23 14:45:11,135 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 41 [2018-01-23 14:45:11,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:11,136 INFO L225 Difference]: With dead ends: 52 [2018-01-23 14:45:11,136 INFO L226 Difference]: Without dead ends: 43 [2018-01-23 14:45:11,137 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1132, Invalid=1838, Unknown=0, NotChecked=0, Total=2970 [2018-01-23 14:45:11,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-23 14:45:11,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-23 14:45:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-23 14:45:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-01-23 14:45:11,141 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-01-23 14:45:11,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:11,141 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-01-23 14:45:11,142 INFO L433 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-01-23 14:45:11,142 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-01-23 14:45:11,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-23 14:45:11,142 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:11,142 INFO L322 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:11,143 INFO L371 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:11,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1383770187, now seen corresponding path program 25 times [2018-01-23 14:45:11,143 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:11,143 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:11,144 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:11,144 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:11,144 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:11,155 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:11,523 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:11,523 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 [2018-01-23 14:45:11,528 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:45:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:11,542 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:11,800 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:11,800 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2018-01-23 14:45:11,800 INFO L409 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-01-23 14:45:11,801 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-01-23 14:45:11,801 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1186, Invalid=1894, Unknown=0, NotChecked=0, Total=3080 [2018-01-23 14:45:11,801 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 56 states. [2018-01-23 14:45:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:11,907 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-01-23 14:45:11,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-23 14:45:11,907 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 42 [2018-01-23 14:45:11,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:11,907 INFO L225 Difference]: With dead ends: 53 [2018-01-23 14:45:11,907 INFO L226 Difference]: Without dead ends: 44 [2018-01-23 14:45:11,908 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1216, Invalid=1976, Unknown=0, NotChecked=0, Total=3192 [2018-01-23 14:45:11,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-01-23 14:45:11,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-01-23 14:45:11,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-23 14:45:11,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-01-23 14:45:11,911 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-01-23 14:45:11,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:11,911 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-01-23 14:45:11,911 INFO L433 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-01-23 14:45:11,911 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-01-23 14:45:11,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-01-23 14:45:11,911 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:11,911 INFO L322 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:11,911 INFO L371 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:11,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1454772304, now seen corresponding path program 26 times [2018-01-23 14:45:11,912 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:11,912 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:11,912 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:11,912 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:45:11,912 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:11,922 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:12,295 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:12,296 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 [2018-01-23 14:45:12,301 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:45:12,308 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:12,315 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:12,320 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:12,322 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:12,720 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:12,720 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2018-01-23 14:45:12,720 INFO L409 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-01-23 14:45:12,721 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-01-23 14:45:12,721 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1272, Invalid=2034, Unknown=0, NotChecked=0, Total=3306 [2018-01-23 14:45:12,721 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 58 states. [2018-01-23 14:45:12,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:12,775 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-01-23 14:45:12,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-23 14:45:12,775 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 43 [2018-01-23 14:45:12,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:12,776 INFO L225 Difference]: With dead ends: 54 [2018-01-23 14:45:12,776 INFO L226 Difference]: Without dead ends: 45 [2018-01-23 14:45:12,776 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1303, Invalid=2119, Unknown=0, NotChecked=0, Total=3422 [2018-01-23 14:45:12,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-23 14:45:12,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-01-23 14:45:12,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-23 14:45:12,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-01-23 14:45:12,779 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-01-23 14:45:12,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:12,780 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-01-23 14:45:12,780 INFO L433 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-01-23 14:45:12,780 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-01-23 14:45:12,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-23 14:45:12,781 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:12,781 INFO L322 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:12,781 INFO L371 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:12,781 INFO L82 PathProgramCache]: Analyzing trace with hash 744723691, now seen corresponding path program 27 times [2018-01-23 14:45:12,781 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:12,781 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:12,782 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:12,782 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:12,782 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:12,793 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:13,232 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:13,232 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 [2018-01-23 14:45:13,237 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:45:13,243 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:13,245 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:13,246 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:13,246 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:13,247 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:13,248 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:13,249 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:13,250 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:13,251 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:13,252 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:13,254 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:13,255 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:13,256 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:13,257 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:13,258 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:13,258 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:13,260 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:13,566 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:13,566 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2018-01-23 14:45:13,566 INFO L409 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-01-23 14:45:13,567 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-01-23 14:45:13,567 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1361, Invalid=2179, Unknown=0, NotChecked=0, Total=3540 [2018-01-23 14:45:13,567 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 60 states. [2018-01-23 14:45:13,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:13,609 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-01-23 14:45:13,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-23 14:45:13,609 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 44 [2018-01-23 14:45:13,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:13,609 INFO L225 Difference]: With dead ends: 55 [2018-01-23 14:45:13,609 INFO L226 Difference]: Without dead ends: 46 [2018-01-23 14:45:13,610 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1393, Invalid=2267, Unknown=0, NotChecked=0, Total=3660 [2018-01-23 14:45:13,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-23 14:45:13,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-01-23 14:45:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-01-23 14:45:13,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-01-23 14:45:13,612 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-01-23 14:45:13,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:13,612 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-01-23 14:45:13,612 INFO L433 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-01-23 14:45:13,612 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-01-23 14:45:13,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-01-23 14:45:13,613 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:13,613 INFO L322 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:13,613 INFO L371 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:13,613 INFO L82 PathProgramCache]: Analyzing trace with hash 209622800, now seen corresponding path program 28 times [2018-01-23 14:45:13,613 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:13,613 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:13,614 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:13,614 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:13,614 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:13,624 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:13,978 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:13,978 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 [2018-01-23 14:45:13,983 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:45:13,997 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:13,999 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:14,304 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:14,304 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2018-01-23 14:45:14,305 INFO L409 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-01-23 14:45:14,305 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-01-23 14:45:14,305 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1453, Invalid=2329, Unknown=0, NotChecked=0, Total=3782 [2018-01-23 14:45:14,306 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 62 states. [2018-01-23 14:45:14,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:14,377 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-01-23 14:45:14,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-01-23 14:45:14,378 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 45 [2018-01-23 14:45:14,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:14,378 INFO L225 Difference]: With dead ends: 56 [2018-01-23 14:45:14,378 INFO L226 Difference]: Without dead ends: 47 [2018-01-23 14:45:14,379 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1486, Invalid=2420, Unknown=0, NotChecked=0, Total=3906 [2018-01-23 14:45:14,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-01-23 14:45:14,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-01-23 14:45:14,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-01-23 14:45:14,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-01-23 14:45:14,381 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-01-23 14:45:14,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:14,381 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-01-23 14:45:14,381 INFO L433 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-01-23 14:45:14,381 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-01-23 14:45:14,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-23 14:45:14,381 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:14,382 INFO L322 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:14,382 INFO L371 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:14,382 INFO L82 PathProgramCache]: Analyzing trace with hash 801364363, now seen corresponding path program 29 times [2018-01-23 14:45:14,382 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:14,382 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:14,382 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:14,383 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:14,383 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:14,393 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:14,788 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:14,789 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 [2018-01-23 14:45:14,793 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:45:14,798 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:14,798 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:14,799 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:14,800 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:14,801 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:14,802 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:14,802 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:14,803 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:14,804 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:14,805 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:14,806 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:14,807 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:14,808 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:14,809 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:14,810 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:14,813 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:14,814 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:14,816 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:15,149 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:15,149 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2018-01-23 14:45:15,150 INFO L409 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-01-23 14:45:15,150 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-01-23 14:45:15,151 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1548, Invalid=2484, Unknown=0, NotChecked=0, Total=4032 [2018-01-23 14:45:15,151 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 64 states. [2018-01-23 14:45:15,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:15,231 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-01-23 14:45:15,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-01-23 14:45:15,232 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 46 [2018-01-23 14:45:15,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:15,232 INFO L225 Difference]: With dead ends: 57 [2018-01-23 14:45:15,232 INFO L226 Difference]: Without dead ends: 48 [2018-01-23 14:45:15,233 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1582, Invalid=2578, Unknown=0, NotChecked=0, Total=4160 [2018-01-23 14:45:15,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-01-23 14:45:15,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-01-23 14:45:15,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-23 14:45:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-01-23 14:45:15,236 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-01-23 14:45:15,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:15,236 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-01-23 14:45:15,236 INFO L433 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-01-23 14:45:15,236 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-01-23 14:45:15,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-01-23 14:45:15,236 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:15,236 INFO L322 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:15,236 INFO L371 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:15,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1965483632, now seen corresponding path program 30 times [2018-01-23 14:45:15,237 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:15,237 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:15,237 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:15,237 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:15,237 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:15,248 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:15,642 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:15,642 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 [2018-01-23 14:45:15,647 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:45:15,653 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:15,655 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:15,656 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:15,657 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:15,658 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:15,659 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:15,660 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:15,661 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:15,662 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:15,663 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:15,664 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:15,665 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:15,666 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:15,667 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:15,668 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:15,670 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:15,670 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:15,672 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:16,013 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:16,013 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2018-01-23 14:45:16,014 INFO L409 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-01-23 14:45:16,014 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-01-23 14:45:16,014 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1646, Invalid=2644, Unknown=0, NotChecked=0, Total=4290 [2018-01-23 14:45:16,014 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 66 states. [2018-01-23 14:45:16,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:16,096 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-01-23 14:45:16,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-23 14:45:16,096 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 47 [2018-01-23 14:45:16,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:16,096 INFO L225 Difference]: With dead ends: 58 [2018-01-23 14:45:16,097 INFO L226 Difference]: Without dead ends: 49 [2018-01-23 14:45:16,097 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2005 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1681, Invalid=2741, Unknown=0, NotChecked=0, Total=4422 [2018-01-23 14:45:16,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-23 14:45:16,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-01-23 14:45:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-23 14:45:16,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-01-23 14:45:16,100 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-01-23 14:45:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:16,101 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-01-23 14:45:16,101 INFO L433 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-01-23 14:45:16,101 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-01-23 14:45:16,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-23 14:45:16,102 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:16,102 INFO L322 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:16,102 INFO L371 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:16,102 INFO L82 PathProgramCache]: Analyzing trace with hash -601524693, now seen corresponding path program 31 times [2018-01-23 14:45:16,102 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:16,102 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:16,103 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:16,103 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:16,103 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:16,112 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:16,562 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:16,562 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) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:16,567 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:45:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:16,583 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:16,966 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:16,966 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2018-01-23 14:45:16,967 INFO L409 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-01-23 14:45:16,967 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-01-23 14:45:16,967 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1747, Invalid=2809, Unknown=0, NotChecked=0, Total=4556 [2018-01-23 14:45:16,968 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 68 states. [2018-01-23 14:45:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:17,050 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-01-23 14:45:17,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-01-23 14:45:17,050 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 48 [2018-01-23 14:45:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:17,051 INFO L225 Difference]: With dead ends: 59 [2018-01-23 14:45:17,051 INFO L226 Difference]: Without dead ends: 50 [2018-01-23 14:45:17,051 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1783, Invalid=2909, Unknown=0, NotChecked=0, Total=4692 [2018-01-23 14:45:17,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-23 14:45:17,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-01-23 14:45:17,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-23 14:45:17,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-01-23 14:45:17,054 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-01-23 14:45:17,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:17,054 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-01-23 14:45:17,054 INFO L433 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-01-23 14:45:17,054 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-01-23 14:45:17,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-01-23 14:45:17,054 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:17,054 INFO L322 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:17,054 INFO L371 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:17,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1425595856, now seen corresponding path program 32 times [2018-01-23 14:45:17,055 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:17,055 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:17,055 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:17,055 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:45:17,055 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:17,066 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:17,522 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:17,522 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:17,527 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:45:17,534 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:17,540 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:17,542 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:17,543 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:17,926 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:17,927 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2018-01-23 14:45:17,927 INFO L409 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-01-23 14:45:17,927 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-01-23 14:45:17,928 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1851, Invalid=2979, Unknown=0, NotChecked=0, Total=4830 [2018-01-23 14:45:17,928 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 70 states. [2018-01-23 14:45:18,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:18,018 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-01-23 14:45:18,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-01-23 14:45:18,018 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 49 [2018-01-23 14:45:18,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:18,019 INFO L225 Difference]: With dead ends: 60 [2018-01-23 14:45:18,019 INFO L226 Difference]: Without dead ends: 51 [2018-01-23 14:45:18,019 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2267 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1888, Invalid=3082, Unknown=0, NotChecked=0, Total=4970 [2018-01-23 14:45:18,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-23 14:45:18,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-01-23 14:45:18,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-01-23 14:45:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-01-23 14:45:18,021 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-01-23 14:45:18,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:18,022 INFO L432 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-01-23 14:45:18,022 INFO L433 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-01-23 14:45:18,022 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-01-23 14:45:18,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-01-23 14:45:18,022 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:18,022 INFO L322 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:18,023 INFO L371 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:18,023 INFO L82 PathProgramCache]: Analyzing trace with hash -158176565, now seen corresponding path program 33 times [2018-01-23 14:45:18,023 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:18,023 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:18,024 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:18,024 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:18,024 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:18,037 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:18,502 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:18,502 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:18,506 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:45:18,514 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:18,515 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:18,516 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:18,517 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:18,518 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:18,520 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:18,521 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:18,522 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:18,523 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:18,524 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:18,525 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:18,526 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:18,527 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:18,529 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:18,530 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:18,531 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:18,532 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:18,533 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:18,534 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:18,535 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:18,931 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:18,931 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 72 [2018-01-23 14:45:18,931 INFO L409 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-01-23 14:45:18,932 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-01-23 14:45:18,932 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1958, Invalid=3154, Unknown=0, NotChecked=0, Total=5112 [2018-01-23 14:45:18,932 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 72 states. [2018-01-23 14:45:18,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:18,990 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-01-23 14:45:18,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-01-23 14:45:18,990 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 50 [2018-01-23 14:45:18,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:18,991 INFO L225 Difference]: With dead ends: 61 [2018-01-23 14:45:18,991 INFO L226 Difference]: Without dead ends: 52 [2018-01-23 14:45:18,991 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1996, Invalid=3260, Unknown=0, NotChecked=0, Total=5256 [2018-01-23 14:45:18,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-01-23 14:45:18,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-01-23 14:45:18,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-23 14:45:18,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-01-23 14:45:18,993 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-01-23 14:45:18,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:18,994 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-01-23 14:45:18,994 INFO L433 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-01-23 14:45:18,994 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-01-23 14:45:18,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-01-23 14:45:18,994 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:18,994 INFO L322 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:18,994 INFO L371 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:18,994 INFO L82 PathProgramCache]: Analyzing trace with hash -2010481360, now seen corresponding path program 34 times [2018-01-23 14:45:18,994 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:18,995 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:18,995 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:18,995 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:18,995 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:19,003 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:19,467 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:19,467 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:19,471 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:45:19,488 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:19,490 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:19,912 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:19,912 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 74 [2018-01-23 14:45:19,912 INFO L409 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-01-23 14:45:19,913 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-01-23 14:45:19,913 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2068, Invalid=3334, Unknown=0, NotChecked=0, Total=5402 [2018-01-23 14:45:19,913 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 74 states. [2018-01-23 14:45:19,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:19,983 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-01-23 14:45:19,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-01-23 14:45:19,984 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 51 [2018-01-23 14:45:19,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:19,984 INFO L225 Difference]: With dead ends: 62 [2018-01-23 14:45:19,984 INFO L226 Difference]: Without dead ends: 53 [2018-01-23 14:45:19,985 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2545 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2107, Invalid=3443, Unknown=0, NotChecked=0, Total=5550 [2018-01-23 14:45:19,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-01-23 14:45:19,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-01-23 14:45:19,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-23 14:45:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-01-23 14:45:19,987 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-01-23 14:45:19,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:19,987 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-01-23 14:45:19,987 INFO L433 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-01-23 14:45:19,987 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-01-23 14:45:19,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-23 14:45:19,987 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:19,988 INFO L322 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:19,988 INFO L371 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:19,988 INFO L82 PathProgramCache]: Analyzing trace with hash 697612139, now seen corresponding path program 35 times [2018-01-23 14:45:19,988 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:19,988 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:19,988 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:19,989 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:19,989 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:19,999 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:20,636 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:20,636 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:20,641 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:45:20,645 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:20,646 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:20,647 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:20,648 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:20,648 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:20,649 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:20,650 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:20,651 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:20,651 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:20,652 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:20,653 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:20,654 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:20,655 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:20,656 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:20,657 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:20,658 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:20,659 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:20,660 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:20,668 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:20,670 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:20,672 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:21,404 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:21,404 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 76 [2018-01-23 14:45:21,404 INFO L409 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-01-23 14:45:21,405 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-01-23 14:45:21,405 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2181, Invalid=3519, Unknown=0, NotChecked=0, Total=5700 [2018-01-23 14:45:21,405 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 76 states. [2018-01-23 14:45:21,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:21,616 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-01-23 14:45:21,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-01-23 14:45:21,616 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 52 [2018-01-23 14:45:21,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:21,617 INFO L225 Difference]: With dead ends: 63 [2018-01-23 14:45:21,617 INFO L226 Difference]: Without dead ends: 54 [2018-01-23 14:45:21,617 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2221, Invalid=3631, Unknown=0, NotChecked=0, Total=5852 [2018-01-23 14:45:21,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-23 14:45:21,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-01-23 14:45:21,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-23 14:45:21,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-01-23 14:45:21,621 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-01-23 14:45:21,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:21,621 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-01-23 14:45:21,621 INFO L433 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-01-23 14:45:21,621 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-01-23 14:45:21,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-01-23 14:45:21,622 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:21,622 INFO L322 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:21,622 INFO L371 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:21,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1250835312, now seen corresponding path program 36 times [2018-01-23 14:45:21,622 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:21,622 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:21,623 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:21,623 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:21,623 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:21,636 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:22,319 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:22,319 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:22,328 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:45:22,335 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:22,337 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:22,338 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:22,339 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:22,340 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:22,341 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:22,342 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:22,343 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:22,344 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:22,345 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:22,346 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:22,347 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:22,348 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:22,349 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:22,350 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:22,351 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:22,353 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:22,354 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:22,355 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:22,356 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:22,358 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:22,817 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:22,817 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2018-01-23 14:45:22,817 INFO L409 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-01-23 14:45:22,817 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-01-23 14:45:22,818 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2297, Invalid=3709, Unknown=0, NotChecked=0, Total=6006 [2018-01-23 14:45:22,818 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 78 states. [2018-01-23 14:45:22,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:22,877 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-01-23 14:45:22,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-01-23 14:45:22,877 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 53 [2018-01-23 14:45:22,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:22,878 INFO L225 Difference]: With dead ends: 64 [2018-01-23 14:45:22,878 INFO L226 Difference]: Without dead ends: 55 [2018-01-23 14:45:22,879 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2839 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2338, Invalid=3824, Unknown=0, NotChecked=0, Total=6162 [2018-01-23 14:45:22,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-23 14:45:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-01-23 14:45:22,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-23 14:45:22,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-01-23 14:45:22,881 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-01-23 14:45:22,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:22,881 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-01-23 14:45:22,881 INFO L433 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-01-23 14:45:22,881 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-01-23 14:45:22,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-01-23 14:45:22,882 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:22,882 INFO L322 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:22,882 INFO L371 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:22,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1523164149, now seen corresponding path program 37 times [2018-01-23 14:45:22,883 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:22,883 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:22,883 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:22,883 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:22,884 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:22,893 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:23,425 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:23,425 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:23,430 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:45:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:23,448 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:23,953 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:23,973 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:23,973 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2018-01-23 14:45:23,973 INFO L409 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-01-23 14:45:23,974 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-01-23 14:45:23,974 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2416, Invalid=3904, Unknown=0, NotChecked=0, Total=6320 [2018-01-23 14:45:23,974 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 80 states. [2018-01-23 14:45:24,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:24,055 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-01-23 14:45:24,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-01-23 14:45:24,056 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 54 [2018-01-23 14:45:24,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:24,057 INFO L225 Difference]: With dead ends: 65 [2018-01-23 14:45:24,057 INFO L226 Difference]: Without dead ends: 56 [2018-01-23 14:45:24,057 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2458, Invalid=4022, Unknown=0, NotChecked=0, Total=6480 [2018-01-23 14:45:24,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-23 14:45:24,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-01-23 14:45:24,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-23 14:45:24,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-01-23 14:45:24,061 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-01-23 14:45:24,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:24,061 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-01-23 14:45:24,061 INFO L433 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-01-23 14:45:24,061 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-01-23 14:45:24,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-01-23 14:45:24,062 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:24,062 INFO L322 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:24,062 INFO L371 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:24,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1375423504, now seen corresponding path program 38 times [2018-01-23 14:45:24,063 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:24,063 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:24,063 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:24,063 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:45:24,064 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:24,075 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:24,740 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:24,740 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:24,745 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:45:24,753 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:24,763 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:24,765 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:24,767 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:25,417 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:25,417 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2018-01-23 14:45:25,418 INFO L409 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-01-23 14:45:25,418 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-01-23 14:45:25,418 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2538, Invalid=4104, Unknown=0, NotChecked=0, Total=6642 [2018-01-23 14:45:25,419 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 82 states. [2018-01-23 14:45:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:25,495 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-01-23 14:45:25,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-01-23 14:45:25,495 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 55 [2018-01-23 14:45:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:25,495 INFO L225 Difference]: With dead ends: 66 [2018-01-23 14:45:25,496 INFO L226 Difference]: Without dead ends: 57 [2018-01-23 14:45:25,496 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3149 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2581, Invalid=4225, Unknown=0, NotChecked=0, Total=6806 [2018-01-23 14:45:25,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-23 14:45:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-01-23 14:45:25,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-23 14:45:25,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-01-23 14:45:25,499 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-01-23 14:45:25,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:25,499 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-01-23 14:45:25,499 INFO L433 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-01-23 14:45:25,499 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-01-23 14:45:25,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-23 14:45:25,499 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:25,499 INFO L322 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:25,499 INFO L371 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:25,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1090430805, now seen corresponding path program 39 times [2018-01-23 14:45:25,500 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:25,500 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:25,500 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:25,500 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:25,500 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:25,510 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:26,124 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:26,124 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:26,129 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:45:26,137 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,138 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,139 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,140 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,142 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,143 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,144 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,145 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,147 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,148 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,149 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,150 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,151 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,152 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,153 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,154 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,156 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,157 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,158 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,160 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,161 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:26,161 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:26,163 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:26,702 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:26,703 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 84 [2018-01-23 14:45:26,703 INFO L409 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-01-23 14:45:26,703 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-01-23 14:45:26,704 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2663, Invalid=4309, Unknown=0, NotChecked=0, Total=6972 [2018-01-23 14:45:26,704 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 84 states. [2018-01-23 14:45:26,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:26,783 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-01-23 14:45:26,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-01-23 14:45:26,783 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 56 [2018-01-23 14:45:26,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:26,784 INFO L225 Difference]: With dead ends: 67 [2018-01-23 14:45:26,784 INFO L226 Difference]: Without dead ends: 58 [2018-01-23 14:45:26,784 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3310 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2707, Invalid=4433, Unknown=0, NotChecked=0, Total=7140 [2018-01-23 14:45:26,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-01-23 14:45:26,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-01-23 14:45:26,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-23 14:45:26,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-01-23 14:45:26,787 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-01-23 14:45:26,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:26,787 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-01-23 14:45:26,787 INFO L433 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-01-23 14:45:26,787 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-01-23 14:45:26,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-01-23 14:45:26,788 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:26,788 INFO L322 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:26,788 INFO L371 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:26,788 INFO L82 PathProgramCache]: Analyzing trace with hash -845591728, now seen corresponding path program 40 times [2018-01-23 14:45:26,788 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:26,788 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:26,788 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:26,788 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:26,789 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:26,798 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:27,428 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:27,428 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:27,433 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:45:27,450 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:27,452 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:27,987 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:27,987 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 86 [2018-01-23 14:45:27,987 INFO L409 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-01-23 14:45:27,988 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-01-23 14:45:27,988 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2791, Invalid=4519, Unknown=0, NotChecked=0, Total=7310 [2018-01-23 14:45:27,988 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 86 states. [2018-01-23 14:45:28,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:28,070 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-01-23 14:45:28,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-01-23 14:45:28,070 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 57 [2018-01-23 14:45:28,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:28,071 INFO L225 Difference]: With dead ends: 68 [2018-01-23 14:45:28,071 INFO L226 Difference]: Without dead ends: 59 [2018-01-23 14:45:28,072 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3475 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2836, Invalid=4646, Unknown=0, NotChecked=0, Total=7482 [2018-01-23 14:45:28,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-23 14:45:28,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-01-23 14:45:28,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-01-23 14:45:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-01-23 14:45:28,075 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-01-23 14:45:28,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:28,075 INFO L432 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-01-23 14:45:28,076 INFO L433 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-01-23 14:45:28,076 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-01-23 14:45:28,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-01-23 14:45:28,076 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:28,076 INFO L322 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:28,076 INFO L371 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:28,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1845514933, now seen corresponding path program 41 times [2018-01-23 14:45:28,077 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:28,077 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:28,077 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:28,078 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:28,078 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:28,093 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:28,707 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:28,707 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:28,712 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:45:28,717 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,731 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,732 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,745 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,746 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,759 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,772 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,773 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,781 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,787 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,788 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,794 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,795 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,796 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,798 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,799 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,801 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,802 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,804 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,805 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,807 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,811 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:28,813 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:28,815 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:29,393 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:29,393 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 88 [2018-01-23 14:45:29,394 INFO L409 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-01-23 14:45:29,394 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-01-23 14:45:29,394 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2922, Invalid=4734, Unknown=0, NotChecked=0, Total=7656 [2018-01-23 14:45:29,394 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 88 states. [2018-01-23 14:45:29,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:29,464 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-01-23 14:45:29,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-01-23 14:45:29,464 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 58 [2018-01-23 14:45:29,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:29,465 INFO L225 Difference]: With dead ends: 69 [2018-01-23 14:45:29,465 INFO L226 Difference]: Without dead ends: 60 [2018-01-23 14:45:29,465 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3644 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2968, Invalid=4864, Unknown=0, NotChecked=0, Total=7832 [2018-01-23 14:45:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-23 14:45:29,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-01-23 14:45:29,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-23 14:45:29,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-01-23 14:45:29,468 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-01-23 14:45:29,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:29,468 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-01-23 14:45:29,468 INFO L433 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-01-23 14:45:29,468 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-01-23 14:45:29,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-01-23 14:45:29,468 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:29,468 INFO L322 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:29,468 INFO L371 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:29,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1516604080, now seen corresponding path program 42 times [2018-01-23 14:45:29,469 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:29,469 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:29,469 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:29,469 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:29,469 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:29,480 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:30,137 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:30,137 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:30,142 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:45:30,149 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,151 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,152 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,153 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,155 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,156 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,157 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,158 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,159 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,160 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,162 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,163 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,164 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,165 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,167 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,168 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,169 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,171 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,172 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,174 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,175 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,176 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:30,177 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:30,179 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:30,782 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:30,783 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 90 [2018-01-23 14:45:30,783 INFO L409 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-01-23 14:45:30,783 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-01-23 14:45:30,784 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3056, Invalid=4954, Unknown=0, NotChecked=0, Total=8010 [2018-01-23 14:45:30,784 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 90 states. [2018-01-23 14:45:30,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:30,878 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-01-23 14:45:30,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-01-23 14:45:30,879 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 59 [2018-01-23 14:45:30,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:30,879 INFO L225 Difference]: With dead ends: 70 [2018-01-23 14:45:30,879 INFO L226 Difference]: Without dead ends: 61 [2018-01-23 14:45:30,880 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3817 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3103, Invalid=5087, Unknown=0, NotChecked=0, Total=8190 [2018-01-23 14:45:30,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-23 14:45:30,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-01-23 14:45:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-01-23 14:45:30,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-01-23 14:45:30,884 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-01-23 14:45:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:30,884 INFO L432 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-01-23 14:45:30,884 INFO L433 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-01-23 14:45:30,885 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-01-23 14:45:30,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-01-23 14:45:30,885 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:30,885 INFO L322 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:30,885 INFO L371 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:30,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1631888917, now seen corresponding path program 43 times [2018-01-23 14:45:30,886 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:30,886 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:30,886 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:30,887 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:30,887 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:30,898 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:31,598 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:31,598 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:31,603 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:45:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:31,629 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:32,285 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:32,285 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 92 [2018-01-23 14:45:32,285 INFO L409 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-01-23 14:45:32,286 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-01-23 14:45:32,286 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3193, Invalid=5179, Unknown=0, NotChecked=0, Total=8372 [2018-01-23 14:45:32,286 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 92 states. [2018-01-23 14:45:32,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:32,379 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-01-23 14:45:32,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-01-23 14:45:32,380 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 60 [2018-01-23 14:45:32,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:32,380 INFO L225 Difference]: With dead ends: 71 [2018-01-23 14:45:32,380 INFO L226 Difference]: Without dead ends: 62 [2018-01-23 14:45:32,381 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3994 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3241, Invalid=5315, Unknown=0, NotChecked=0, Total=8556 [2018-01-23 14:45:32,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-01-23 14:45:32,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-01-23 14:45:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-01-23 14:45:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-01-23 14:45:32,383 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-01-23 14:45:32,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:32,383 INFO L432 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-01-23 14:45:32,383 INFO L433 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-01-23 14:45:32,383 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-01-23 14:45:32,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-01-23 14:45:32,384 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:32,384 INFO L322 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:32,384 INFO L371 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:32,384 INFO L82 PathProgramCache]: Analyzing trace with hash -450924016, now seen corresponding path program 44 times [2018-01-23 14:45:32,384 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:32,384 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:32,385 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:32,385 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:45:32,385 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:32,396 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:33,157 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:33,157 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:33,161 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:45:33,169 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:33,177 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:33,179 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:33,181 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:33,841 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:33,842 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 94 [2018-01-23 14:45:33,842 INFO L409 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-01-23 14:45:33,842 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-01-23 14:45:33,843 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3333, Invalid=5409, Unknown=0, NotChecked=0, Total=8742 [2018-01-23 14:45:33,843 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 94 states. [2018-01-23 14:45:33,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:33,939 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-01-23 14:45:33,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-01-23 14:45:33,940 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 61 [2018-01-23 14:45:33,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:33,940 INFO L225 Difference]: With dead ends: 72 [2018-01-23 14:45:33,940 INFO L226 Difference]: Without dead ends: 63 [2018-01-23 14:45:33,941 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4175 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3382, Invalid=5548, Unknown=0, NotChecked=0, Total=8930 [2018-01-23 14:45:33,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-01-23 14:45:33,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-01-23 14:45:33,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-01-23 14:45:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-01-23 14:45:33,943 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-01-23 14:45:33,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:33,943 INFO L432 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-01-23 14:45:33,943 INFO L433 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-01-23 14:45:33,943 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-01-23 14:45:33,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-01-23 14:45:33,944 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:33,944 INFO L322 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:33,944 INFO L371 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:33,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1799249547, now seen corresponding path program 45 times [2018-01-23 14:45:33,944 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:33,944 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:33,945 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:33,945 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:33,945 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:33,957 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:34,709 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:34,709 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:34,714 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:45:34,721 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,723 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,724 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,725 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,726 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,727 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,728 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,729 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,730 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,731 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,732 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,733 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,734 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,735 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,737 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,738 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,739 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,740 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,741 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,743 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,744 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,745 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,747 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,748 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:34,748 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:34,751 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:35,434 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:35,434 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2018-01-23 14:45:35,435 INFO L409 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-01-23 14:45:35,435 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-01-23 14:45:35,435 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3476, Invalid=5644, Unknown=0, NotChecked=0, Total=9120 [2018-01-23 14:45:35,435 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 96 states. [2018-01-23 14:45:35,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:35,529 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-01-23 14:45:35,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-01-23 14:45:35,529 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 62 [2018-01-23 14:45:35,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:35,529 INFO L225 Difference]: With dead ends: 73 [2018-01-23 14:45:35,529 INFO L226 Difference]: Without dead ends: 64 [2018-01-23 14:45:35,530 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4360 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3526, Invalid=5786, Unknown=0, NotChecked=0, Total=9312 [2018-01-23 14:45:35,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-01-23 14:45:35,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-01-23 14:45:35,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-01-23 14:45:35,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-01-23 14:45:35,532 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-01-23 14:45:35,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:35,533 INFO L432 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-01-23 14:45:35,533 INFO L433 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-01-23 14:45:35,533 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-01-23 14:45:35,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-01-23 14:45:35,533 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:35,533 INFO L322 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:35,533 INFO L371 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:35,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1459814032, now seen corresponding path program 46 times [2018-01-23 14:45:35,533 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:35,533 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:35,534 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:35,534 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:35,534 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:35,546 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:36,341 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:36,342 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:36,346 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:45:36,365 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:36,367 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:37,067 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:37,067 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2018-01-23 14:45:37,068 INFO L409 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-01-23 14:45:37,068 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-01-23 14:45:37,068 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3622, Invalid=5884, Unknown=0, NotChecked=0, Total=9506 [2018-01-23 14:45:37,068 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 98 states. [2018-01-23 14:45:37,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:37,168 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-01-23 14:45:37,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-01-23 14:45:37,168 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 63 [2018-01-23 14:45:37,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:37,168 INFO L225 Difference]: With dead ends: 74 [2018-01-23 14:45:37,168 INFO L226 Difference]: Without dead ends: 65 [2018-01-23 14:45:37,169 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4549 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3673, Invalid=6029, Unknown=0, NotChecked=0, Total=9702 [2018-01-23 14:45:37,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-01-23 14:45:37,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-01-23 14:45:37,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-01-23 14:45:37,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-01-23 14:45:37,171 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-01-23 14:45:37,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:37,171 INFO L432 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-01-23 14:45:37,171 INFO L433 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-01-23 14:45:37,172 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-01-23 14:45:37,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-01-23 14:45:37,172 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:37,172 INFO L322 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:37,172 INFO L371 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:37,172 INFO L82 PathProgramCache]: Analyzing trace with hash 588430123, now seen corresponding path program 47 times [2018-01-23 14:45:37,172 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:37,172 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:37,173 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:37,173 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:37,173 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:37,185 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:38,018 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:38,018 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:38,023 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:45:38,028 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,028 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,029 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,030 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,031 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,031 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,032 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,033 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,034 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,035 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,036 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,037 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,038 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,038 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,039 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,040 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,041 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,042 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,044 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,045 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,046 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,047 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,048 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,049 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,054 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:38,056 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:38,058 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:38,789 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:38,789 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 100 [2018-01-23 14:45:38,790 INFO L409 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-01-23 14:45:38,790 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-01-23 14:45:38,790 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3771, Invalid=6129, Unknown=0, NotChecked=0, Total=9900 [2018-01-23 14:45:38,791 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 100 states. [2018-01-23 14:45:38,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:38,876 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-01-23 14:45:38,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-01-23 14:45:38,877 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 64 [2018-01-23 14:45:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:38,877 INFO L225 Difference]: With dead ends: 75 [2018-01-23 14:45:38,877 INFO L226 Difference]: Without dead ends: 66 [2018-01-23 14:45:38,878 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4742 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3823, Invalid=6277, Unknown=0, NotChecked=0, Total=10100 [2018-01-23 14:45:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-01-23 14:45:38,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-01-23 14:45:38,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-23 14:45:38,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-01-23 14:45:38,881 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-01-23 14:45:38,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:38,881 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-01-23 14:45:38,881 INFO L433 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-01-23 14:45:38,881 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-01-23 14:45:38,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-01-23 14:45:38,882 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:38,882 INFO L322 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:38,882 INFO L371 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:38,882 INFO L82 PathProgramCache]: Analyzing trace with hash -340510512, now seen corresponding path program 48 times [2018-01-23 14:45:38,882 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:38,882 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:38,882 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:38,883 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:38,883 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:38,903 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:39,839 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:39,839 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:39,845 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:45:39,852 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,854 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,856 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,857 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,858 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,859 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,860 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,861 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,862 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,863 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,864 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,866 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,867 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,868 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,869 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,870 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,871 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,873 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,874 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,875 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,876 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,878 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,879 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,880 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,882 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:45:39,882 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:39,884 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:40,638 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:40,638 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 102 [2018-01-23 14:45:40,639 INFO L409 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-01-23 14:45:40,639 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-01-23 14:45:40,639 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3923, Invalid=6379, Unknown=0, NotChecked=0, Total=10302 [2018-01-23 14:45:40,640 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 102 states. [2018-01-23 14:45:40,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:40,724 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-01-23 14:45:40,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-01-23 14:45:40,725 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 65 [2018-01-23 14:45:40,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:40,725 INFO L225 Difference]: With dead ends: 76 [2018-01-23 14:45:40,725 INFO L226 Difference]: Without dead ends: 67 [2018-01-23 14:45:40,726 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4939 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3976, Invalid=6530, Unknown=0, NotChecked=0, Total=10506 [2018-01-23 14:45:40,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-01-23 14:45:40,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-01-23 14:45:40,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-01-23 14:45:40,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-01-23 14:45:40,728 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-01-23 14:45:40,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:40,728 INFO L432 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-01-23 14:45:40,729 INFO L433 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-01-23 14:45:40,729 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-01-23 14:45:40,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-01-23 14:45:40,729 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:40,729 INFO L322 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:40,729 INFO L371 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:40,729 INFO L82 PathProgramCache]: Analyzing trace with hash 927100875, now seen corresponding path program 49 times [2018-01-23 14:45:40,729 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:40,729 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:40,730 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:40,730 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:40,730 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:40,743 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:41,625 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:41,625 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:41,629 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:45:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:41,650 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:42,729 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:42,729 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 104 [2018-01-23 14:45:42,729 INFO L409 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-01-23 14:45:42,730 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-01-23 14:45:42,730 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4078, Invalid=6634, Unknown=0, NotChecked=0, Total=10712 [2018-01-23 14:45:42,730 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 104 states. [2018-01-23 14:45:42,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:42,832 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-01-23 14:45:42,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-01-23 14:45:42,832 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 66 [2018-01-23 14:45:42,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:42,833 INFO L225 Difference]: With dead ends: 77 [2018-01-23 14:45:42,833 INFO L226 Difference]: Without dead ends: 68 [2018-01-23 14:45:42,833 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5140 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4132, Invalid=6788, Unknown=0, NotChecked=0, Total=10920 [2018-01-23 14:45:42,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-01-23 14:45:42,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-01-23 14:45:42,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-01-23 14:45:42,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-01-23 14:45:42,836 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-01-23 14:45:42,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:42,836 INFO L432 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-01-23 14:45:42,836 INFO L433 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-01-23 14:45:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-01-23 14:45:42,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-01-23 14:45:42,837 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:42,837 INFO L322 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:42,837 INFO L371 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:42,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1568348208, now seen corresponding path program 50 times [2018-01-23 14:45:42,837 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:42,837 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:42,838 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:42,838 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:45:42,838 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:42,851 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:43,757 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:43,757 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:43,762 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:45:43,768 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:43,777 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:43,780 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:43,782 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:44,594 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:44,594 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 106 [2018-01-23 14:45:44,595 INFO L409 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-01-23 14:45:44,595 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-01-23 14:45:44,596 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4236, Invalid=6894, Unknown=0, NotChecked=0, Total=11130 [2018-01-23 14:45:44,596 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 106 states. [2018-01-23 14:45:44,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:44,724 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-01-23 14:45:44,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-01-23 14:45:44,724 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 67 [2018-01-23 14:45:44,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:44,725 INFO L225 Difference]: With dead ends: 78 [2018-01-23 14:45:44,725 INFO L226 Difference]: Without dead ends: 69 [2018-01-23 14:45:44,725 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5345 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4291, Invalid=7051, Unknown=0, NotChecked=0, Total=11342 [2018-01-23 14:45:44,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-23 14:45:44,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-01-23 14:45:44,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-01-23 14:45:44,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-01-23 14:45:44,728 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-01-23 14:45:44,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:44,728 INFO L432 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-01-23 14:45:44,728 INFO L433 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-01-23 14:45:44,728 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-01-23 14:45:44,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-01-23 14:45:44,729 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:44,729 INFO L322 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:44,729 INFO L371 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:44,729 INFO L82 PathProgramCache]: Analyzing trace with hash -27820949, now seen corresponding path program 51 times [2018-01-23 14:45:44,729 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:44,729 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:44,729 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:44,729 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:44,730 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:44,743 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:45,844 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:45,844 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:45,849 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:45:45,856 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,858 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,859 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,860 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,861 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,862 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,863 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,864 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,865 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,866 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,867 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,868 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,869 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,870 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,871 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,873 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,874 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,875 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,876 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,878 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,879 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,880 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,882 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,883 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,884 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,886 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,887 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:45:45,887 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:45,889 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:46,779 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:46,780 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 108 [2018-01-23 14:45:46,780 INFO L409 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-01-23 14:45:46,780 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-01-23 14:45:46,781 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4397, Invalid=7159, Unknown=0, NotChecked=0, Total=11556 [2018-01-23 14:45:46,781 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 108 states. [2018-01-23 14:45:47,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:47,005 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-01-23 14:45:47,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-01-23 14:45:47,006 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 68 [2018-01-23 14:45:47,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:47,006 INFO L225 Difference]: With dead ends: 79 [2018-01-23 14:45:47,006 INFO L226 Difference]: Without dead ends: 70 [2018-01-23 14:45:47,007 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5554 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4453, Invalid=7319, Unknown=0, NotChecked=0, Total=11772 [2018-01-23 14:45:47,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-01-23 14:45:47,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-01-23 14:45:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-01-23 14:45:47,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-01-23 14:45:47,011 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-01-23 14:45:47,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:47,011 INFO L432 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-01-23 14:45:47,011 INFO L433 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-01-23 14:45:47,011 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-01-23 14:45:47,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-01-23 14:45:47,012 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:47,012 INFO L322 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:47,012 INFO L371 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:47,012 INFO L82 PathProgramCache]: Analyzing trace with hash 2030542736, now seen corresponding path program 52 times [2018-01-23 14:45:47,012 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:47,013 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:47,013 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:47,013 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:47,013 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:47,037 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:48,222 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:48,222 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:48,227 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:45:48,252 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:48,255 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:49,123 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:49,123 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 110 [2018-01-23 14:45:49,124 INFO L409 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-01-23 14:45:49,124 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-01-23 14:45:49,125 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4561, Invalid=7429, Unknown=0, NotChecked=0, Total=11990 [2018-01-23 14:45:49,125 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 110 states. [2018-01-23 14:45:49,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:49,218 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-01-23 14:45:49,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-01-23 14:45:49,219 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 69 [2018-01-23 14:45:49,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:49,219 INFO L225 Difference]: With dead ends: 80 [2018-01-23 14:45:49,219 INFO L226 Difference]: Without dead ends: 71 [2018-01-23 14:45:49,220 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5767 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4618, Invalid=7592, Unknown=0, NotChecked=0, Total=12210 [2018-01-23 14:45:49,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-01-23 14:45:49,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-01-23 14:45:49,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-01-23 14:45:49,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-01-23 14:45:49,222 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-01-23 14:45:49,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:49,222 INFO L432 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-01-23 14:45:49,223 INFO L433 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-01-23 14:45:49,223 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-01-23 14:45:49,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-01-23 14:45:49,223 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:49,223 INFO L322 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:49,223 INFO L371 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:49,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1415307531, now seen corresponding path program 53 times [2018-01-23 14:45:49,223 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:49,223 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:49,224 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:49,224 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:49,224 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:49,239 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:45:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:50,269 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:45:50,269 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:45:50,274 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:45:50,278 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,279 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,280 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,280 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,281 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,282 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,283 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,283 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,284 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,285 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,286 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,287 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,288 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,288 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,289 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,290 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,291 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,292 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,293 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,294 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,296 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,297 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,298 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,299 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,300 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,301 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,332 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,336 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:45:50,337 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:45:50,340 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:45:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:45:51,236 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:45:51,236 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 112 [2018-01-23 14:45:51,237 INFO L409 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-01-23 14:45:51,237 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-01-23 14:45:51,237 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4728, Invalid=7704, Unknown=0, NotChecked=0, Total=12432 [2018-01-23 14:45:51,238 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 112 states. [2018-01-23 14:45:51,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:45:51,340 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-01-23 14:45:51,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-01-23 14:45:51,340 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 70 [2018-01-23 14:45:51,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:45:51,340 INFO L225 Difference]: With dead ends: 81 [2018-01-23 14:45:51,340 INFO L226 Difference]: Without dead ends: 72 [2018-01-23 14:45:51,341 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5984 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4786, Invalid=7870, Unknown=0, NotChecked=0, Total=12656 [2018-01-23 14:45:51,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-01-23 14:45:51,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-01-23 14:45:51,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-01-23 14:45:51,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-01-23 14:45:51,345 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-01-23 14:45:51,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:45:51,345 INFO L432 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-01-23 14:45:51,345 INFO L433 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-01-23 14:45:51,345 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-01-23 14:45:51,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-01-23 14:45:51,346 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:45:51,346 INFO L322 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:45:51,346 INFO L371 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:45:51,346 INFO L82 PathProgramCache]: Analyzing trace with hash -477114640, now seen corresponding path program 54 times [2018-01-23 14:45:51,346 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:45:51,346 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:45:51,347 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:51,347 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:45:51,347 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:45:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:45:51,366 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. Received shutdown request... [2018-01-23 14:45:51,417 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:264) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.access$1(Interpolator.java:262) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:131) 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:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:200) 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:279) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:162) 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:368) 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:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:157) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:113) 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) [2018-01-23 14:45:51,420 INFO L168 Benchmark]: Toolchain (without parser) took 52765.13 ms. Allocated memory was 303.0 MB in the beginning and 826.3 MB in the end (delta: 523.2 MB). Free memory was 262.3 MB in the beginning and 488.2 MB in the end (delta: -225.8 MB). Peak memory consumption was 297.4 MB. Max. memory is 5.3 GB. [2018-01-23 14:45:51,422 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 303.0 MB. Free memory is still 267.3 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 14:45:51,422 INFO L168 Benchmark]: CACSL2BoogieTranslator took 165.99 ms. Allocated memory is still 303.0 MB. Free memory was 261.3 MB in the beginning and 254.1 MB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 5.3 GB. [2018-01-23 14:45:51,422 INFO L168 Benchmark]: Boogie Preprocessor took 26.98 ms. Allocated memory is still 303.0 MB. Free memory was 254.1 MB in the beginning and 252.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:45:51,423 INFO L168 Benchmark]: RCFGBuilder took 165.42 ms. Allocated memory is still 303.0 MB. Free memory was 252.1 MB in the beginning and 240.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 5.3 GB. [2018-01-23 14:45:51,423 INFO L168 Benchmark]: TraceAbstraction took 52400.93 ms. Allocated memory was 303.0 MB in the beginning and 826.3 MB in the end (delta: 523.2 MB). Free memory was 240.5 MB in the beginning and 488.2 MB in the end (delta: -247.6 MB). Peak memory consumption was 275.6 MB. Max. memory is 5.3 GB. [2018-01-23 14:45:51,425 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 303.0 MB. Free memory is still 267.3 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 165.99 ms. Allocated memory is still 303.0 MB. Free memory was 261.3 MB in the beginning and 254.1 MB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 26.98 ms. Allocated memory is still 303.0 MB. Free memory was 254.1 MB in the beginning and 252.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 165.42 ms. Allocated memory is still 303.0 MB. Free memory was 252.1 MB in the beginning and 240.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 52400.93 ms. Allocated memory was 303.0 MB in the beginning and 826.3 MB in the end (delta: 523.2 MB). Free memory was 240.5 MB in the beginning and 488.2 MB in the end (delta: -247.6 MB). Peak memory consumption was 275.6 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, 21 locations, 3 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=21occurred 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, 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, REUSE_STATISTICS: 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:264) 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/memsetNonZero_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-23_14-45-51-433.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memsetNonZero_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-23_14-45-51-433.csv Completed graceful shutdown