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/array-industry-pattern/array_of_struct_ptr_flag_init_true-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d63d1fb [2018-01-27 22:54:42,606 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-27 22:54:42,611 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-27 22:54:42,641 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-27 22:54:42,642 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-27 22:54:42,644 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-27 22:54:42,646 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-27 22:54:42,651 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-27 22:54:42,660 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-27 22:54:42,661 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-27 22:54:42,663 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-27 22:54:42,664 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-27 22:54:42,674 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-27 22:54:42,677 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-27 22:54:42,678 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-27 22:54:42,688 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-27 22:54:42,691 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-27 22:54:42,694 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-27 22:54:42,697 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-27 22:54:42,699 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-27 22:54:42,702 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-27 22:54:42,702 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-27 22:54:42,703 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-27 22:54:42,705 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-27 22:54:42,706 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-27 22:54:42,709 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-27 22:54:42,709 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-27 22:54:42,710 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-27 22:54:42,711 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-27 22:54:42,711 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-27 22:54:42,712 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-27 22:54:42,713 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-27 22:54:42,729 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-27 22:54:42,729 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-27 22:54:42,731 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-27 22:54:42,731 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-27 22:54:42,731 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-27 22:54:42,732 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-27 22:54:42,732 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-27 22:54:42,733 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-27 22:54:42,733 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-27 22:54:42,733 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-27 22:54:42,734 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-27 22:54:42,734 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-27 22:54:42,734 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-27 22:54:42,734 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-27 22:54:42,734 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-27 22:54:42,735 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-27 22:54:42,735 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-27 22:54:42,735 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-27 22:54:42,735 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-27 22:54:42,735 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-27 22:54:42,736 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-27 22:54:42,736 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-27 22:54:42,736 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-27 22:54:42,736 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-27 22:54:42,736 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-27 22:54:42,737 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-27 22:54:42,737 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-27 22:54:42,737 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-27 22:54:42,737 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-27 22:54:42,737 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-27 22:54:42,738 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-27 22:54:42,738 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-27 22:54:42,738 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-27 22:54:42,738 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-27 22:54:42,738 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-27 22:54:42,740 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-27 22:54:42,740 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-27 22:54:42,820 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-27 22:54:42,843 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-27 22:54:42,853 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-27 22:54:42,856 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-27 22:54:42,857 INFO L276 PluginConnector]: CDTParser initialized [2018-01-27 22:54:42,858 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init_true-unreach-call.i [2018-01-27 22:54:43,058 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-27 22:54:43,072 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-27 22:54:43,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-27 22:54:43,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-27 22:54:43,088 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-27 22:54:43,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 10:54:43" (1/1) ... [2018-01-27 22:54:43,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a8a1214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:54:43, skipping insertion in model container [2018-01-27 22:54:43,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 10:54:43" (1/1) ... [2018-01-27 22:54:43,126 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-27 22:54:43,163 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-27 22:54:43,465 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-27 22:54:43,506 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-27 22:54:43,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:54:43 WrapperNode [2018-01-27 22:54:43,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-27 22:54:43,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-27 22:54:43,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-27 22:54:43,525 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-27 22:54:43,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:54:43" (1/1) ... [2018-01-27 22:54:43,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:54:43" (1/1) ... [2018-01-27 22:54:43,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:54:43" (1/1) ... [2018-01-27 22:54:43,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:54:43" (1/1) ... [2018-01-27 22:54:43,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:54:43" (1/1) ... [2018-01-27 22:54:43,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:54:43" (1/1) ... [2018-01-27 22:54:43,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:54:43" (1/1) ... [2018-01-27 22:54:43,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-27 22:54:43,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-27 22:54:43,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-27 22:54:43,597 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-27 22:54:43,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:54:43" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-27 22:54:43,714 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-27 22:54:43,715 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-27 22:54:43,715 INFO L136 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-01-27 22:54:43,718 INFO L136 BoogieDeclarations]: Found implementation of procedure init [2018-01-27 22:54:43,719 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-27 22:54:43,719 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-27 22:54:43,719 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-27 22:54:43,719 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-27 22:54:43,719 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-27 22:54:43,720 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-27 22:54:43,720 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-27 22:54:43,720 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-27 22:54:43,720 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-01-27 22:54:43,720 INFO L128 BoogieDeclarations]: Found specification of procedure init [2018-01-27 22:54:43,721 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-27 22:54:43,721 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-27 22:54:43,721 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-27 22:54:44,352 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-27 22:54:44,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 10:54:44 BoogieIcfgContainer [2018-01-27 22:54:44,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-27 22:54:44,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-27 22:54:44,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-27 22:54:44,365 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-27 22:54:44,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 10:54:43" (1/3) ... [2018-01-27 22:54:44,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@425e186d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 10:54:44, skipping insertion in model container [2018-01-27 22:54:44,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:54:43" (2/3) ... [2018-01-27 22:54:44,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@425e186d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 10:54:44, skipping insertion in model container [2018-01-27 22:54:44,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 10:54:44" (3/3) ... [2018-01-27 22:54:44,377 INFO L105 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init_true-unreach-call.i [2018-01-27 22:54:44,388 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-27 22:54:44,400 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-01-27 22:54:44,482 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-27 22:54:44,483 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-27 22:54:44,483 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-27 22:54:44,483 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-27 22:54:44,483 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-27 22:54:44,484 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-27 22:54:44,484 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-27 22:54:44,484 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == initErr0EnsuresViolation======== [2018-01-27 22:54:44,485 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-27 22:54:44,528 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-27 22:54:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-27 22:54:44,549 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:54:44,551 INFO L330 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:54:44,552 INFO L371 AbstractCegarLoop]: === Iteration 1 === [initErr0EnsuresViolation]=== [2018-01-27 22:54:44,561 INFO L82 PathProgramCache]: Analyzing trace with hash 50689409, now seen corresponding path program 1 times [2018-01-27 22:54:44,565 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:54:44,567 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:54:44,663 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:44,663 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 22:54:44,664 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:54:44,795 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:54:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:44,897 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-27 22:54:44,898 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-27 22:54:44,901 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-27 22:54:44,925 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-27 22:54:44,927 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-27 22:54:44,932 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2018-01-27 22:54:44,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:54:44,988 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2018-01-27 22:54:44,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-27 22:54:44,990 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-01-27 22:54:44,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:54:45,008 INFO L225 Difference]: With dead ends: 78 [2018-01-27 22:54:45,009 INFO L226 Difference]: Without dead ends: 16 [2018-01-27 22:54:45,023 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-27 22:54:45,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-01-27 22:54:45,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-01-27 22:54:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-01-27 22:54:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-01-27 22:54:45,221 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2018-01-27 22:54:45,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:54:45,222 INFO L432 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-01-27 22:54:45,222 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-27 22:54:45,223 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-01-27 22:54:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-27 22:54:45,224 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:54:45,226 INFO L330 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:54:45,226 INFO L371 AbstractCegarLoop]: === Iteration 2 === [initErr0EnsuresViolation]=== [2018-01-27 22:54:45,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1571360785, now seen corresponding path program 1 times [2018-01-27 22:54:45,227 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:54:45,228 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:54:45,230 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:45,231 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 22:54:45,232 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:54:45,279 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:54:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:45,381 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-27 22:54:45,381 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-27 22:54:45,386 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-27 22:54:45,387 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-27 22:54:45,388 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-27 22:54:45,388 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2018-01-27 22:54:45,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:54:45,487 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-01-27 22:54:45,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-27 22:54:45,488 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-01-27 22:54:45,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:54:45,489 INFO L225 Difference]: With dead ends: 21 [2018-01-27 22:54:45,489 INFO L226 Difference]: Without dead ends: 19 [2018-01-27 22:54:45,491 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-27 22:54:45,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-01-27 22:54:45,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2018-01-27 22:54:45,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-01-27 22:54:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-01-27 22:54:45,496 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2018-01-27 22:54:45,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:54:45,497 INFO L432 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-01-27 22:54:45,497 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-27 22:54:45,498 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-01-27 22:54:45,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-27 22:54:45,499 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:54:45,499 INFO L330 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:54:45,499 INFO L371 AbstractCegarLoop]: === Iteration 3 === [initErr0EnsuresViolation]=== [2018-01-27 22:54:45,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1958084762, now seen corresponding path program 1 times [2018-01-27 22:54:45,501 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:54:45,502 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:54:45,504 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:45,504 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 22:54:45,504 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:54:45,563 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:54:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:45,799 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:54:45,800 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:54:45,827 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 22:54:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:54:45,911 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:54:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:46,144 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:54:46,144 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-01-27 22:54:46,145 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-27 22:54:46,145 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-27 22:54:46,146 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-27 22:54:46,146 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 7 states. [2018-01-27 22:54:46,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:54:46,503 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-01-27 22:54:46,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-27 22:54:46,505 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-01-27 22:54:46,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:54:46,506 INFO L225 Difference]: With dead ends: 28 [2018-01-27 22:54:46,506 INFO L226 Difference]: Without dead ends: 26 [2018-01-27 22:54:46,507 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-01-27 22:54:46,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-01-27 22:54:46,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2018-01-27 22:54:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-01-27 22:54:46,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-01-27 22:54:46,515 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2018-01-27 22:54:46,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:54:46,516 INFO L432 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-01-27 22:54:46,516 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-27 22:54:46,516 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-01-27 22:54:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-27 22:54:46,517 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:54:46,518 INFO L330 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:54:46,518 INFO L371 AbstractCegarLoop]: === Iteration 4 === [initErr0EnsuresViolation]=== [2018-01-27 22:54:46,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1223843121, now seen corresponding path program 2 times [2018-01-27 22:54:46,518 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:54:46,518 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:54:46,519 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:46,520 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 22:54:46,520 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:54:46,587 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:54:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:46,722 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:54:46,722 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:54:46,735 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 22:54:46,779 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:46,802 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:46,814 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 22:54:46,818 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:54:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:47,258 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:54:47,259 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-01-27 22:54:47,261 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-27 22:54:47,262 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-27 22:54:47,262 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2018-01-27 22:54:47,263 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2018-01-27 22:54:47,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:54:47,512 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-01-27 22:54:47,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-27 22:54:47,513 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-01-27 22:54:47,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:54:47,514 INFO L225 Difference]: With dead ends: 33 [2018-01-27 22:54:47,514 INFO L226 Difference]: Without dead ends: 31 [2018-01-27 22:54:47,515 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2018-01-27 22:54:47,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-01-27 22:54:47,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-01-27 22:54:47,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-01-27 22:54:47,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-01-27 22:54:47,524 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2018-01-27 22:54:47,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:54:47,525 INFO L432 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-01-27 22:54:47,525 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-27 22:54:47,525 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-01-27 22:54:47,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-27 22:54:47,526 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:54:47,526 INFO L330 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:54:47,527 INFO L371 AbstractCegarLoop]: === Iteration 5 === [initErr0EnsuresViolation]=== [2018-01-27 22:54:47,527 INFO L82 PathProgramCache]: Analyzing trace with hash -513546682, now seen corresponding path program 3 times [2018-01-27 22:54:47,527 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:54:47,528 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:54:47,530 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:47,530 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 22:54:47,530 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:54:47,597 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:54:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:47,861 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:54:47,899 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 [2018-01-27 22:54:47,907 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 22:54:47,934 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:54:47,951 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:54:47,967 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:54:47,987 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:54:48,001 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 22:54:48,006 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:54:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:48,600 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:54:48,601 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2018-01-27 22:54:48,601 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-27 22:54:48,602 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-27 22:54:48,602 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-01-27 22:54:48,602 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 11 states. [2018-01-27 22:54:48,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:54:48,968 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-01-27 22:54:48,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-27 22:54:48,969 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2018-01-27 22:54:48,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:54:48,970 INFO L225 Difference]: With dead ends: 38 [2018-01-27 22:54:48,971 INFO L226 Difference]: Without dead ends: 36 [2018-01-27 22:54:48,972 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-01-27 22:54:48,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-27 22:54:48,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-01-27 22:54:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-01-27 22:54:48,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-01-27 22:54:48,982 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2018-01-27 22:54:48,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:54:48,983 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-01-27 22:54:48,983 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-27 22:54:48,983 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-01-27 22:54:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-27 22:54:48,985 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:54:48,985 INFO L330 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:54:48,985 INFO L371 AbstractCegarLoop]: === Iteration 6 === [initErr0EnsuresViolation]=== [2018-01-27 22:54:48,985 INFO L82 PathProgramCache]: Analyzing trace with hash -749354415, now seen corresponding path program 4 times [2018-01-27 22:54:48,986 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:54:48,986 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:54:48,987 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:48,987 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 22:54:48,987 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:54:49,024 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:54:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:49,201 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:54:49,201 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:54:49,209 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 22:54:49,267 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 22:54:49,272 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:54:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:49,625 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:54:49,626 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-01-27 22:54:49,626 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-27 22:54:49,627 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-27 22:54:49,627 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-01-27 22:54:49,628 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 13 states. [2018-01-27 22:54:49,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:54:49,880 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-01-27 22:54:49,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-27 22:54:49,881 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-01-27 22:54:49,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:54:49,882 INFO L225 Difference]: With dead ends: 43 [2018-01-27 22:54:49,882 INFO L226 Difference]: Without dead ends: 41 [2018-01-27 22:54:49,883 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2018-01-27 22:54:49,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-27 22:54:49,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2018-01-27 22:54:49,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-27 22:54:49,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-01-27 22:54:49,893 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2018-01-27 22:54:49,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:54:49,893 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-01-27 22:54:49,894 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-27 22:54:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-01-27 22:54:49,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-27 22:54:49,895 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:54:49,895 INFO L330 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:54:49,896 INFO L371 AbstractCegarLoop]: === Iteration 7 === [initErr0EnsuresViolation]=== [2018-01-27 22:54:49,896 INFO L82 PathProgramCache]: Analyzing trace with hash -319638234, now seen corresponding path program 5 times [2018-01-27 22:54:49,896 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:54:49,896 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:54:49,898 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:49,898 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 22:54:49,898 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:54:49,933 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:54:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:50,337 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:54:50,337 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:54:50,356 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 22:54:50,376 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:50,392 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:50,408 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:50,426 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:50,442 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:50,468 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:50,481 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 22:54:50,486 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:54:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:51,108 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:54:51,108 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2018-01-27 22:54:51,109 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-27 22:54:51,109 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-27 22:54:51,109 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-01-27 22:54:51,110 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 15 states. [2018-01-27 22:54:51,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:54:51,700 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-01-27 22:54:51,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-27 22:54:51,701 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2018-01-27 22:54:51,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:54:51,703 INFO L225 Difference]: With dead ends: 48 [2018-01-27 22:54:51,703 INFO L226 Difference]: Without dead ends: 46 [2018-01-27 22:54:51,704 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2018-01-27 22:54:51,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-27 22:54:51,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2018-01-27 22:54:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-27 22:54:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-01-27 22:54:51,713 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2018-01-27 22:54:51,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:54:51,713 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-01-27 22:54:51,713 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-27 22:54:51,714 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-01-27 22:54:51,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-27 22:54:51,715 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:54:51,715 INFO L330 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:54:51,715 INFO L371 AbstractCegarLoop]: === Iteration 8 === [initErr0EnsuresViolation]=== [2018-01-27 22:54:51,715 INFO L82 PathProgramCache]: Analyzing trace with hash -720027791, now seen corresponding path program 6 times [2018-01-27 22:54:51,716 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:54:51,716 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:54:51,717 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:51,718 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 22:54:51,718 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:54:51,753 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:54:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:51,966 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:54:51,966 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:54:51,974 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 22:54:51,994 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:54:52,010 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:54:52,015 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:54:52,019 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:54:52,024 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:54:52,032 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:54:52,044 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:54:52,045 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 22:54:52,050 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:54:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:52,264 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:54:52,264 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-01-27 22:54:52,265 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-27 22:54:52,266 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-27 22:54:52,266 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2018-01-27 22:54:52,267 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 17 states. [2018-01-27 22:54:52,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:54:52,482 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-01-27 22:54:52,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-27 22:54:52,483 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2018-01-27 22:54:52,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:54:52,484 INFO L225 Difference]: With dead ends: 53 [2018-01-27 22:54:52,485 INFO L226 Difference]: Without dead ends: 51 [2018-01-27 22:54:52,486 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=347, Unknown=0, NotChecked=0, Total=552 [2018-01-27 22:54:52,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-27 22:54:52,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2018-01-27 22:54:52,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-27 22:54:52,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-01-27 22:54:52,496 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2018-01-27 22:54:52,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:54:52,497 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-01-27 22:54:52,497 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-27 22:54:52,497 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-01-27 22:54:52,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-01-27 22:54:52,499 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:54:52,499 INFO L330 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:54:52,499 INFO L371 AbstractCegarLoop]: === Iteration 9 === [initErr0EnsuresViolation]=== [2018-01-27 22:54:52,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1359713274, now seen corresponding path program 7 times [2018-01-27 22:54:52,500 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:54:52,500 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:54:52,501 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:52,502 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 22:54:52,507 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:54:52,536 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:54:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:52,721 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:54:52,721 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:54:52,730 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 22:54:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:54:52,771 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:54:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:53,068 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:54:53,069 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2018-01-27 22:54:53,069 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-27 22:54:53,070 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-27 22:54:53,070 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2018-01-27 22:54:53,070 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 19 states. [2018-01-27 22:54:53,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:54:53,360 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-01-27 22:54:53,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-27 22:54:53,361 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2018-01-27 22:54:53,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:54:53,363 INFO L225 Difference]: With dead ends: 58 [2018-01-27 22:54:53,363 INFO L226 Difference]: Without dead ends: 56 [2018-01-27 22:54:53,364 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=444, Unknown=0, NotChecked=0, Total=702 [2018-01-27 22:54:53,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-27 22:54:53,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2018-01-27 22:54:53,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-27 22:54:53,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-01-27 22:54:53,375 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 47 [2018-01-27 22:54:53,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:54:53,376 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-01-27 22:54:53,376 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-27 22:54:53,377 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-01-27 22:54:53,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-27 22:54:53,378 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:54:53,378 INFO L330 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:54:53,378 INFO L371 AbstractCegarLoop]: === Iteration 10 === [initErr0EnsuresViolation]=== [2018-01-27 22:54:53,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1005769873, now seen corresponding path program 8 times [2018-01-27 22:54:53,379 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:54:53,379 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:54:53,381 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:53,381 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 22:54:53,381 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:54:53,403 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:54:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:54,499 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:54:54,499 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:54:54,510 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 22:54:54,528 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:54,556 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:54,573 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 22:54:54,579 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:54:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:54,832 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:54:54,832 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-01-27 22:54:54,833 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-27 22:54:54,834 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-27 22:54:54,834 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=256, Unknown=0, NotChecked=0, Total=420 [2018-01-27 22:54:54,835 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 21 states. [2018-01-27 22:54:55,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:54:55,125 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-01-27 22:54:55,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-27 22:54:55,126 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2018-01-27 22:54:55,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:54:55,128 INFO L225 Difference]: With dead ends: 63 [2018-01-27 22:54:55,128 INFO L226 Difference]: Without dead ends: 61 [2018-01-27 22:54:55,129 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-01-27 22:54:55,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-27 22:54:55,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2018-01-27 22:54:55,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-27 22:54:55,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-01-27 22:54:55,148 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 52 [2018-01-27 22:54:55,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:54:55,149 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-01-27 22:54:55,149 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-27 22:54:55,149 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-01-27 22:54:55,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-01-27 22:54:55,153 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:54:55,154 INFO L330 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:54:55,154 INFO L371 AbstractCegarLoop]: === Iteration 11 === [initErr0EnsuresViolation]=== [2018-01-27 22:54:55,154 INFO L82 PathProgramCache]: Analyzing trace with hash -2098787610, now seen corresponding path program 9 times [2018-01-27 22:54:55,154 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:54:55,154 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:54:55,156 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:55,156 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 22:54:55,156 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:54:55,196 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:54:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:56,736 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:54:56,736 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:54:56,743 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 22:54:56,760 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:54:56,764 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:54:56,767 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:54:56,771 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:54:56,776 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:54:56,782 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:54:56,789 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:54:56,802 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:54:56,818 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:54:56,865 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:54:56,867 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 22:54:56,872 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:54:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:57,091 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:54:57,092 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2018-01-27 22:54:57,092 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-01-27 22:54:57,093 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-01-27 22:54:57,093 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-01-27 22:54:57,094 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 23 states. [2018-01-27 22:54:57,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:54:57,490 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-01-27 22:54:57,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-27 22:54:57,491 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2018-01-27 22:54:57,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:54:57,492 INFO L225 Difference]: With dead ends: 68 [2018-01-27 22:54:57,492 INFO L226 Difference]: Without dead ends: 66 [2018-01-27 22:54:57,493 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=382, Invalid=674, Unknown=0, NotChecked=0, Total=1056 [2018-01-27 22:54:57,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-01-27 22:54:57,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2018-01-27 22:54:57,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-01-27 22:54:57,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-01-27 22:54:57,503 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 57 [2018-01-27 22:54:57,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:54:57,504 INFO L432 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-01-27 22:54:57,504 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-01-27 22:54:57,504 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-01-27 22:54:57,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-01-27 22:54:57,506 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:54:57,506 INFO L330 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:54:57,506 INFO L371 AbstractCegarLoop]: === Iteration 12 === [initErr0EnsuresViolation]=== [2018-01-27 22:54:57,507 INFO L82 PathProgramCache]: Analyzing trace with hash 724599217, now seen corresponding path program 10 times [2018-01-27 22:54:57,507 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:54:57,507 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:54:57,508 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:57,509 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 22:54:57,509 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:54:57,539 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:54:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:57,763 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:54:57,763 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:54:57,776 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 22:54:57,864 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 22:54:57,870 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:54:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:58,863 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:54:58,863 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-01-27 22:54:58,864 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-01-27 22:54:58,864 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-01-27 22:54:58,865 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=367, Unknown=0, NotChecked=0, Total=600 [2018-01-27 22:54:58,865 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 25 states. [2018-01-27 22:54:59,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:54:59,276 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-01-27 22:54:59,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-27 22:54:59,277 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 62 [2018-01-27 22:54:59,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:54:59,278 INFO L225 Difference]: With dead ends: 73 [2018-01-27 22:54:59,278 INFO L226 Difference]: Without dead ends: 71 [2018-01-27 22:54:59,279 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=453, Invalid=807, Unknown=0, NotChecked=0, Total=1260 [2018-01-27 22:54:59,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-01-27 22:54:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2018-01-27 22:54:59,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-01-27 22:54:59,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-01-27 22:54:59,291 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 62 [2018-01-27 22:54:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:54:59,291 INFO L432 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-01-27 22:54:59,291 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-01-27 22:54:59,292 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-01-27 22:54:59,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-01-27 22:54:59,293 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:54:59,293 INFO L330 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:54:59,293 INFO L371 AbstractCegarLoop]: === Iteration 13 === [initErr0EnsuresViolation]=== [2018-01-27 22:54:59,294 INFO L82 PathProgramCache]: Analyzing trace with hash -20409914, now seen corresponding path program 11 times [2018-01-27 22:54:59,294 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:54:59,294 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:54:59,295 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:59,296 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 22:54:59,296 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:54:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:54:59,327 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:54:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:54:59,837 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:54:59,837 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:54:59,851 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 22:54:59,863 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:59,866 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:59,870 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:59,874 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:59,880 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:59,888 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:59,897 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:59,912 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:59,921 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:59,941 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:59,971 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:59,996 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:54:59,999 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 22:55:00,004 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:55:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:00,290 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:55:00,290 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2018-01-27 22:55:00,291 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-01-27 22:55:00,291 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-01-27 22:55:00,292 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=430, Unknown=0, NotChecked=0, Total=702 [2018-01-27 22:55:00,292 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 27 states. [2018-01-27 22:55:00,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:55:00,729 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-01-27 22:55:00,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-27 22:55:00,729 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 67 [2018-01-27 22:55:00,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:55:00,730 INFO L225 Difference]: With dead ends: 78 [2018-01-27 22:55:00,731 INFO L226 Difference]: Without dead ends: 76 [2018-01-27 22:55:00,732 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=952, Unknown=0, NotChecked=0, Total=1482 [2018-01-27 22:55:00,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-01-27 22:55:00,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2018-01-27 22:55:00,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-01-27 22:55:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-01-27 22:55:00,743 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 67 [2018-01-27 22:55:00,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:55:00,744 INFO L432 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-01-27 22:55:00,744 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-01-27 22:55:00,744 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-01-27 22:55:00,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-01-27 22:55:00,746 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:55:00,746 INFO L330 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:55:00,746 INFO L371 AbstractCegarLoop]: === Iteration 14 === [initErr0EnsuresViolation]=== [2018-01-27 22:55:00,747 INFO L82 PathProgramCache]: Analyzing trace with hash 462440145, now seen corresponding path program 12 times [2018-01-27 22:55:00,747 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:55:00,747 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:55:00,748 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:00,749 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 22:55:00,749 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:55:00,781 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:55:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:01,169 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:55:01,169 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:55:01,175 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 22:55:01,192 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:01,207 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:01,223 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:01,244 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:01,260 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:01,274 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:01,294 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:01,321 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:01,404 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:01,550 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:01,742 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:01,778 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:01,924 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:01,927 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 22:55:01,932 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:55:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:02,239 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:55:02,239 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2018-01-27 22:55:02,240 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-01-27 22:55:02,240 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-01-27 22:55:02,241 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2018-01-27 22:55:02,241 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 29 states. [2018-01-27 22:55:02,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:55:02,576 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-01-27 22:55:02,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-27 22:55:02,577 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 72 [2018-01-27 22:55:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:55:02,578 INFO L225 Difference]: With dead ends: 83 [2018-01-27 22:55:02,578 INFO L226 Difference]: Without dead ends: 81 [2018-01-27 22:55:02,579 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=613, Invalid=1109, Unknown=0, NotChecked=0, Total=1722 [2018-01-27 22:55:02,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-01-27 22:55:02,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2018-01-27 22:55:02,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-01-27 22:55:02,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-01-27 22:55:02,588 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 72 [2018-01-27 22:55:02,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:55:02,589 INFO L432 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-01-27 22:55:02,589 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-01-27 22:55:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-01-27 22:55:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-01-27 22:55:02,591 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:55:02,591 INFO L330 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:55:02,591 INFO L371 AbstractCegarLoop]: === Iteration 15 === [initErr0EnsuresViolation]=== [2018-01-27 22:55:02,592 INFO L82 PathProgramCache]: Analyzing trace with hash -753467226, now seen corresponding path program 13 times [2018-01-27 22:55:02,592 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:55:02,592 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:55:02,593 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:02,593 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 22:55:02,594 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:55:02,625 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:55:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:03,212 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:55:03,212 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) [2018-01-27 22:55:03,230 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:55:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:55:03,290 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:55:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:03,597 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:55:03,597 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2018-01-27 22:55:03,598 INFO L409 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-01-27 22:55:03,599 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-01-27 22:55:03,599 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=571, Unknown=0, NotChecked=0, Total=930 [2018-01-27 22:55:03,600 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 31 states. [2018-01-27 22:55:04,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:55:04,050 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-01-27 22:55:04,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-27 22:55:04,077 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 77 [2018-01-27 22:55:04,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:55:04,078 INFO L225 Difference]: With dead ends: 88 [2018-01-27 22:55:04,078 INFO L226 Difference]: Without dead ends: 86 [2018-01-27 22:55:04,080 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=702, Invalid=1278, Unknown=0, NotChecked=0, Total=1980 [2018-01-27 22:55:04,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-27 22:55:04,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2018-01-27 22:55:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-01-27 22:55:04,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-01-27 22:55:04,091 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 77 [2018-01-27 22:55:04,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:55:04,091 INFO L432 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-01-27 22:55:04,092 INFO L433 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-01-27 22:55:04,092 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-01-27 22:55:04,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-01-27 22:55:04,094 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:55:04,095 INFO L330 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:55:04,095 INFO L371 AbstractCegarLoop]: === Iteration 16 === [initErr0EnsuresViolation]=== [2018-01-27 22:55:04,095 INFO L82 PathProgramCache]: Analyzing trace with hash -78371855, now seen corresponding path program 14 times [2018-01-27 22:55:04,095 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:55:04,095 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:55:04,097 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:04,097 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 22:55:04,097 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:55:04,134 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:55:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:04,963 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:55:04,963 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:55:04,972 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 22:55:04,993 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:05,012 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:05,016 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 22:55:05,020 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:55:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:05,616 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:55:05,616 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2018-01-27 22:55:05,617 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-01-27 22:55:05,618 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-01-27 22:55:05,618 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=649, Unknown=0, NotChecked=0, Total=1056 [2018-01-27 22:55:05,619 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 33 states. [2018-01-27 22:55:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:55:06,062 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-01-27 22:55:06,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-27 22:55:06,062 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 82 [2018-01-27 22:55:06,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:55:06,063 INFO L225 Difference]: With dead ends: 93 [2018-01-27 22:55:06,064 INFO L226 Difference]: Without dead ends: 91 [2018-01-27 22:55:06,065 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=797, Invalid=1459, Unknown=0, NotChecked=0, Total=2256 [2018-01-27 22:55:06,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-01-27 22:55:06,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2018-01-27 22:55:06,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-01-27 22:55:06,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-01-27 22:55:06,076 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 82 [2018-01-27 22:55:06,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:55:06,077 INFO L432 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-01-27 22:55:06,077 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-01-27 22:55:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-01-27 22:55:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-01-27 22:55:06,079 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:55:06,079 INFO L330 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:55:06,079 INFO L371 AbstractCegarLoop]: === Iteration 17 === [initErr0EnsuresViolation]=== [2018-01-27 22:55:06,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1429186682, now seen corresponding path program 15 times [2018-01-27 22:55:06,080 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:55:06,080 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:55:06,081 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:06,082 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 22:55:06,082 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:55:06,113 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:55:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:06,561 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:55:06,561 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:55:06,570 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 22:55:06,591 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:06,598 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:06,601 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:06,605 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:06,610 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:06,617 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:06,624 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:06,636 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:06,652 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:06,706 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:06,739 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:06,777 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:07,068 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:07,143 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:07,311 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:07,469 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:07,472 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 22:55:07,478 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:55:07,862 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:07,893 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:55:07,893 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2018-01-27 22:55:07,894 INFO L409 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-01-27 22:55:07,895 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-01-27 22:55:07,895 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=732, Unknown=0, NotChecked=0, Total=1190 [2018-01-27 22:55:07,896 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 35 states. [2018-01-27 22:55:09,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:55:09,119 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-01-27 22:55:09,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-27 22:55:09,145 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 87 [2018-01-27 22:55:09,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:55:09,146 INFO L225 Difference]: With dead ends: 98 [2018-01-27 22:55:09,146 INFO L226 Difference]: Without dead ends: 96 [2018-01-27 22:55:09,147 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=898, Invalid=1652, Unknown=0, NotChecked=0, Total=2550 [2018-01-27 22:55:09,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-01-27 22:55:09,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2018-01-27 22:55:09,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-01-27 22:55:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-01-27 22:55:09,154 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 87 [2018-01-27 22:55:09,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:55:09,154 INFO L432 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-01-27 22:55:09,154 INFO L433 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-01-27 22:55:09,155 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-01-27 22:55:09,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-01-27 22:55:09,158 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:55:09,158 INFO L330 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:55:09,158 INFO L371 AbstractCegarLoop]: === Iteration 18 === [initErr0EnsuresViolation]=== [2018-01-27 22:55:09,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1312692497, now seen corresponding path program 16 times [2018-01-27 22:55:09,159 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:55:09,159 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:55:09,161 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:09,161 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 22:55:09,161 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:55:09,195 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:55:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:10,023 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:55:10,023 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:55:10,031 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-27 22:55:11,740 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 22:55:11,750 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:55:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:12,874 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:55:12,875 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2018-01-27 22:55:12,875 INFO L409 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-01-27 22:55:12,876 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-01-27 22:55:12,876 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=820, Unknown=0, NotChecked=0, Total=1332 [2018-01-27 22:55:12,876 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 37 states. [2018-01-27 22:55:13,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:55:13,549 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-01-27 22:55:13,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-27 22:55:13,550 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 92 [2018-01-27 22:55:13,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:55:13,551 INFO L225 Difference]: With dead ends: 103 [2018-01-27 22:55:13,551 INFO L226 Difference]: Without dead ends: 101 [2018-01-27 22:55:13,553 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1005, Invalid=1857, Unknown=0, NotChecked=0, Total=2862 [2018-01-27 22:55:13,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-01-27 22:55:13,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2018-01-27 22:55:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-01-27 22:55:13,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-01-27 22:55:13,560 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 92 [2018-01-27 22:55:13,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:55:13,560 INFO L432 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-01-27 22:55:13,560 INFO L433 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-01-27 22:55:13,561 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-01-27 22:55:13,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-01-27 22:55:13,561 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:55:13,562 INFO L330 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:55:13,562 INFO L371 AbstractCegarLoop]: === Iteration 19 === [initErr0EnsuresViolation]=== [2018-01-27 22:55:13,562 INFO L82 PathProgramCache]: Analyzing trace with hash 192058982, now seen corresponding path program 17 times [2018-01-27 22:55:13,562 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:55:13,562 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:55:13,563 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:13,563 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 22:55:13,563 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:55:13,595 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:55:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:14,678 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:55:14,711 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:55:14,720 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-27 22:55:14,736 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:14,739 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:14,743 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:14,747 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:14,753 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:14,760 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:14,768 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:14,779 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:14,804 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:14,816 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:14,838 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:14,874 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:14,921 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:14,962 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:14,998 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:15,039 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:15,133 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:15,198 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:15,202 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 22:55:15,209 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:55:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:15,640 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:55:15,640 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2018-01-27 22:55:15,640 INFO L409 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-01-27 22:55:15,641 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-01-27 22:55:15,642 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=913, Unknown=0, NotChecked=0, Total=1482 [2018-01-27 22:55:15,642 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 39 states. [2018-01-27 22:55:17,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:55:17,104 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-01-27 22:55:17,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-27 22:55:17,104 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 97 [2018-01-27 22:55:17,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:55:17,105 INFO L225 Difference]: With dead ends: 108 [2018-01-27 22:55:17,105 INFO L226 Difference]: Without dead ends: 106 [2018-01-27 22:55:17,106 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1118, Invalid=2074, Unknown=0, NotChecked=0, Total=3192 [2018-01-27 22:55:17,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-01-27 22:55:17,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2018-01-27 22:55:17,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-01-27 22:55:17,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-01-27 22:55:17,111 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 97 [2018-01-27 22:55:17,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:55:17,111 INFO L432 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-01-27 22:55:17,111 INFO L433 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-01-27 22:55:17,111 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-01-27 22:55:17,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-01-27 22:55:17,112 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:55:17,112 INFO L330 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:55:17,112 INFO L371 AbstractCegarLoop]: === Iteration 20 === [initErr0EnsuresViolation]=== [2018-01-27 22:55:17,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1301292593, now seen corresponding path program 18 times [2018-01-27 22:55:17,113 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:55:17,113 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:55:17,113 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:17,114 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 22:55:17,114 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:55:17,134 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:55:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:17,792 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:55:17,793 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:55:17,799 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-27 22:55:17,816 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:17,825 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:17,827 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:17,829 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:17,832 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:17,839 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:17,849 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:17,861 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:17,970 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:18,008 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:18,087 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:18,156 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:18,339 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:18,694 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:19,631 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:20,825 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:22,887 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:24,312 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:26,843 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-27 22:55:26,846 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 22:55:26,856 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:55:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:27,128 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:55:27,128 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2018-01-27 22:55:27,128 INFO L409 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-01-27 22:55:27,129 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-01-27 22:55:27,129 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=1011, Unknown=0, NotChecked=0, Total=1640 [2018-01-27 22:55:27,129 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 41 states. [2018-01-27 22:55:27,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:55:27,508 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-01-27 22:55:27,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-27 22:55:27,508 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 102 [2018-01-27 22:55:27,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:55:27,509 INFO L225 Difference]: With dead ends: 113 [2018-01-27 22:55:27,509 INFO L226 Difference]: Without dead ends: 111 [2018-01-27 22:55:27,510 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1237, Invalid=2303, Unknown=0, NotChecked=0, Total=3540 [2018-01-27 22:55:27,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-01-27 22:55:27,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2018-01-27 22:55:27,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-01-27 22:55:27,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-01-27 22:55:27,515 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 102 [2018-01-27 22:55:27,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:55:27,516 INFO L432 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-01-27 22:55:27,516 INFO L433 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-01-27 22:55:27,516 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-01-27 22:55:27,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-01-27 22:55:27,517 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:55:27,517 INFO L330 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:55:27,517 INFO L371 AbstractCegarLoop]: === Iteration 21 === [initErr0EnsuresViolation]=== [2018-01-27 22:55:27,518 INFO L82 PathProgramCache]: Analyzing trace with hash 888913222, now seen corresponding path program 19 times [2018-01-27 22:55:27,518 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:55:27,518 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:55:27,519 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:27,519 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 22:55:27,519 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:55:27,539 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:55:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:27,886 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:55:27,886 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:55:27,892 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 22:55:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:55:27,928 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:55:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:28,223 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:55:28,224 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2018-01-27 22:55:28,224 INFO L409 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-01-27 22:55:28,225 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-01-27 22:55:28,225 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=1114, Unknown=0, NotChecked=0, Total=1806 [2018-01-27 22:55:28,225 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 43 states. [2018-01-27 22:55:28,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:55:28,564 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-01-27 22:55:28,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-27 22:55:28,564 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 107 [2018-01-27 22:55:28,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:55:28,565 INFO L225 Difference]: With dead ends: 118 [2018-01-27 22:55:28,565 INFO L226 Difference]: Without dead ends: 116 [2018-01-27 22:55:28,566 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1362, Invalid=2544, Unknown=0, NotChecked=0, Total=3906 [2018-01-27 22:55:28,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-01-27 22:55:28,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2018-01-27 22:55:28,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-01-27 22:55:28,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-01-27 22:55:28,570 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 107 [2018-01-27 22:55:28,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:55:28,570 INFO L432 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-01-27 22:55:28,570 INFO L433 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-01-27 22:55:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-01-27 22:55:28,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-01-27 22:55:28,571 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:55:28,571 INFO L330 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:55:28,572 INFO L371 AbstractCegarLoop]: === Iteration 22 === [initErr0EnsuresViolation]=== [2018-01-27 22:55:28,572 INFO L82 PathProgramCache]: Analyzing trace with hash 135023441, now seen corresponding path program 20 times [2018-01-27 22:55:28,572 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:55:28,572 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:55:28,573 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:28,573 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-27 22:55:28,573 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:55:28,602 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:55:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:29,073 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:55:29,073 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:55:29,079 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-27 22:55:29,098 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:29,141 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-27 22:55:29,158 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-27 22:55:29,164 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-27 22:55:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:29,854 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-27 22:55:29,855 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 45 [2018-01-27 22:55:29,855 INFO L409 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-01-27 22:55:29,855 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-01-27 22:55:29,856 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=758, Invalid=1222, Unknown=0, NotChecked=0, Total=1980 [2018-01-27 22:55:29,856 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 45 states. [2018-01-27 22:55:30,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-27 22:55:30,679 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-01-27 22:55:30,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-27 22:55:30,712 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 112 [2018-01-27 22:55:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-27 22:55:30,714 INFO L225 Difference]: With dead ends: 123 [2018-01-27 22:55:30,714 INFO L226 Difference]: Without dead ends: 121 [2018-01-27 22:55:30,716 INFO L533 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1493, Invalid=2797, Unknown=0, NotChecked=0, Total=4290 [2018-01-27 22:55:30,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-01-27 22:55:30,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2018-01-27 22:55:30,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-01-27 22:55:30,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-01-27 22:55:30,725 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 112 [2018-01-27 22:55:30,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-27 22:55:30,725 INFO L432 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-01-27 22:55:30,725 INFO L433 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-01-27 22:55:30,725 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-01-27 22:55:30,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-01-27 22:55:30,727 INFO L322 BasicCegarLoop]: Found error trace [2018-01-27 22:55:30,727 INFO L330 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-27 22:55:30,727 INFO L371 AbstractCegarLoop]: === Iteration 23 === [initErr0EnsuresViolation]=== [2018-01-27 22:55:30,727 INFO L82 PathProgramCache]: Analyzing trace with hash 32099366, now seen corresponding path program 21 times [2018-01-27 22:55:30,727 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-27 22:55:30,728 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-27 22:55:30,728 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:30,729 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-27 22:55:30,730 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-27 22:55:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-27 22:55:30,757 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-27 22:55:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-27 22:55:31,261 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-27 22:55:31,261 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-27 22:55:31,267 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-27 22:55:31,285 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:31,288 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:31,290 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:31,292 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:31,295 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:31,299 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:31,305 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:31,318 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:31,338 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:31,389 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:31,496 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:31,552 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:31,725 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:31,967 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:32,263 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:32,369 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:32,988 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:34,299 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:35,215 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-27 22:55:38,240 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command Received shutdown request... [2018-01-27 22:55:46,980 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command Cannot interrupt operation gracefully because timeout expired. Forcing shutdown