java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/memset2_true-valid-memsafety_true-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 14:43:34,710 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 14:43:34,712 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 14:43:34,727 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 14:43:34,727 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 14:43:34,728 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 14:43:34,729 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 14:43:34,731 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 14:43:34,733 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 14:43:34,734 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 14:43:34,735 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 14:43:34,735 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 14:43:34,736 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 14:43:34,737 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 14:43:34,738 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 14:43:34,741 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 14:43:34,743 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 14:43:34,745 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 14:43:34,746 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 14:43:34,748 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 14:43:34,750 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-23 14:43:34,750 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-23 14:43:34,751 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-23 14:43:34,752 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-23 14:43:34,752 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-23 14:43:34,754 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-23 14:43:34,754 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-23 14:43:34,755 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-23 14:43:34,755 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-23 14:43:34,755 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 14:43:34,756 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 14:43:34,756 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-23 14:43:34,765 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 14:43:34,766 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 14:43:34,766 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 14:43:34,766 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 14:43:34,766 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 14:43:34,767 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 14:43:34,767 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 14:43:34,767 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 14:43:34,767 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 14:43:34,767 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 14:43:34,767 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 14:43:34,768 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 14:43:34,768 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 14:43:34,768 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 14:43:34,768 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 14:43:34,768 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 14:43:34,768 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 14:43:34,768 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 14:43:34,768 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 14:43:34,769 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 14:43:34,769 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 14:43:34,769 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 14:43:34,769 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 14:43:34,769 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 14:43:34,770 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 14:43:34,770 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:43:34,770 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 14:43:34,770 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 14:43:34,770 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 14:43:34,770 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 14:43:34,771 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 14:43:34,771 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 14:43:34,771 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 14:43:34,771 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 14:43:34,771 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 14:43:34,772 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 14:43:34,772 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 14:43:34,805 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 14:43:34,815 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 14:43:34,818 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 14:43:34,819 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 14:43:34,820 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 14:43:34,820 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/memset2_true-valid-memsafety_true-termination.c [2018-01-23 14:43:34,938 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 14:43:34,941 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 14:43:34,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 14:43:34,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 14:43:34,948 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 14:43:34,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:43:34" (1/1) ... [2018-01-23 14:43:34,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4642b9e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:34, skipping insertion in model container [2018-01-23 14:43:34,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:43:34" (1/1) ... [2018-01-23 14:43:34,965 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:43:34,979 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:43:35,087 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:43:35,102 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:43:35,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:35 WrapperNode [2018-01-23 14:43:35,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 14:43:35,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 14:43:35,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 14:43:35,108 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 14:43:35,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:35" (1/1) ... [2018-01-23 14:43:35,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:35" (1/1) ... [2018-01-23 14:43:35,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:35" (1/1) ... [2018-01-23 14:43:35,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:35" (1/1) ... [2018-01-23 14:43:35,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:35" (1/1) ... [2018-01-23 14:43:35,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:35" (1/1) ... [2018-01-23 14:43:35,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:35" (1/1) ... [2018-01-23 14:43:35,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 14:43:35,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 14:43:35,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 14:43:35,137 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 14:43:35,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:35" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:43:35,185 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 14:43:35,186 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 14:43:35,186 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 14:43:35,186 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 14:43:35,186 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 14:43:35,186 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 14:43:35,186 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-01-23 14:43:35,186 INFO L136 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-01-23 14:43:35,186 INFO L128 BoogieDeclarations]: Found specification of procedure memset [2018-01-23 14:43:35,186 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 14:43:35,187 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 14:43:35,187 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 14:43:35,321 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 14:43:35,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:43:35 BoogieIcfgContainer [2018-01-23 14:43:35,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 14:43:35,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-23 14:43:35,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-23 14:43:35,324 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-23 14:43:35,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 02:43:34" (1/3) ... [2018-01-23 14:43:35,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff36d78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:43:35, skipping insertion in model container [2018-01-23 14:43:35,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:43:35" (2/3) ... [2018-01-23 14:43:35,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff36d78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:43:35, skipping insertion in model container [2018-01-23 14:43:35,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:43:35" (3/3) ... [2018-01-23 14:43:35,329 INFO L105 eAbstractionObserver]: Analyzing ICFG memset2_true-valid-memsafety_true-termination.c [2018-01-23 14:43:35,339 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-23 14:43:35,348 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-23 14:43:35,394 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:43:35,394 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:43:35,394 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:43:35,394 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:43:35,395 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:43:35,395 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:43:35,395 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:43:35,395 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-23 14:43:35,397 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:43:35,412 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-01-23 14:43:35,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-23 14:43:35,416 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:35,417 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-23 14:43:35,417 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-23 14:43:35,423 INFO L82 PathProgramCache]: Analyzing trace with hash 50935, now seen corresponding path program 1 times [2018-01-23 14:43:35,424 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:35,425 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:35,469 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:35,470 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:35,470 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:43:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:43:35,531 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:43:35,537 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:43:35,543 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:43:35,544 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:43:35,544 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:43:35,544 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:43:35,544 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:43:35,544 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:43:35,544 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:43:35,544 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-23 14:43:35,545 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:43:35,546 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-01-23 14:43:35,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-23 14:43:35,547 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:35,547 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:35,547 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:35,548 INFO L82 PathProgramCache]: Analyzing trace with hash 457189328, now seen corresponding path program 1 times [2018-01-23 14:43:35,548 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:35,548 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:35,550 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:35,550 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:35,550 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:35,586 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:35,676 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:43:35,676 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-23 14:43:35,677 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-23 14:43:35,688 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-23 14:43:35,688 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-23 14:43:35,691 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 4 states. [2018-01-23 14:43:35,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:35,746 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-01-23 14:43:35,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-23 14:43:35,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-01-23 14:43:35,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:35,758 INFO L225 Difference]: With dead ends: 33 [2018-01-23 14:43:35,758 INFO L226 Difference]: Without dead ends: 19 [2018-01-23 14:43:35,761 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:43:35,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-01-23 14:43:35,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-01-23 14:43:35,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-01-23 14:43:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-01-23 14:43:35,851 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-01-23 14:43:35,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:35,852 INFO L432 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-01-23 14:43:35,852 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-23 14:43:35,852 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-01-23 14:43:35,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-23 14:43:35,853 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:35,853 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:35,853 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:35,853 INFO L82 PathProgramCache]: Analyzing trace with hash -114007861, now seen corresponding path program 1 times [2018-01-23 14:43:35,854 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:35,854 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:35,855 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:35,855 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:35,855 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:35,871 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:35,955 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:35,955 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:35,966 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:35,993 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:36,113 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:36,113 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-01-23 14:43:36,114 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-23 14:43:36,115 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-23 14:43:36,115 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-23 14:43:36,115 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 8 states. [2018-01-23 14:43:36,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:36,149 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-01-23 14:43:36,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:43:36,150 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2018-01-23 14:43:36,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:36,151 INFO L225 Difference]: With dead ends: 29 [2018-01-23 14:43:36,151 INFO L226 Difference]: Without dead ends: 20 [2018-01-23 14:43:36,153 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-01-23 14:43:36,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-01-23 14:43:36,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-01-23 14:43:36,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-01-23 14:43:36,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-01-23 14:43:36,157 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-01-23 14:43:36,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:36,158 INFO L432 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-01-23 14:43:36,158 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-23 14:43:36,158 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-01-23 14:43:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-23 14:43:36,159 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:36,159 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:36,159 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:36,159 INFO L82 PathProgramCache]: Analyzing trace with hash -641251536, now seen corresponding path program 2 times [2018-01-23 14:43:36,160 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:36,160 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:36,161 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:36,161 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:36,161 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:36,177 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:36,256 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:36,257 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:36,267 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:43:36,282 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:36,291 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:36,292 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:36,294 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:36,353 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:36,353 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-01-23 14:43:36,353 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:43:36,354 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:43:36,354 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:43:36,354 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 10 states. [2018-01-23 14:43:36,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:36,398 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-01-23 14:43:36,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-23 14:43:36,398 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-01-23 14:43:36,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:36,399 INFO L225 Difference]: With dead ends: 30 [2018-01-23 14:43:36,399 INFO L226 Difference]: Without dead ends: 21 [2018-01-23 14:43:36,400 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-01-23 14:43:36,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-01-23 14:43:36,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-01-23 14:43:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-01-23 14:43:36,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-01-23 14:43:36,404 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-01-23 14:43:36,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:36,405 INFO L432 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-01-23 14:43:36,405 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:43:36,405 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-01-23 14:43:36,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-23 14:43:36,406 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:36,406 INFO L322 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:36,406 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:36,406 INFO L82 PathProgramCache]: Analyzing trace with hash 194063723, now seen corresponding path program 3 times [2018-01-23 14:43:36,406 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:36,407 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:36,408 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:36,408 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:36,408 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:36,422 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:36,509 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:36,510 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:36,518 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:43:36,530 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:36,532 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:36,533 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:36,533 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:36,535 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:36,628 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:36,628 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-01-23 14:43:36,628 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-23 14:43:36,629 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-23 14:43:36,629 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2018-01-23 14:43:36,629 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2018-01-23 14:43:36,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:36,708 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-01-23 14:43:36,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-23 14:43:36,709 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2018-01-23 14:43:36,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:36,710 INFO L225 Difference]: With dead ends: 31 [2018-01-23 14:43:36,710 INFO L226 Difference]: Without dead ends: 22 [2018-01-23 14:43:36,711 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-01-23 14:43:36,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-01-23 14:43:36,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-01-23 14:43:36,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-01-23 14:43:36,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-01-23 14:43:36,714 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-01-23 14:43:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:36,714 INFO L432 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-01-23 14:43:36,714 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-23 14:43:36,715 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-01-23 14:43:36,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-23 14:43:36,715 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:36,715 INFO L322 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:36,715 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:36,716 INFO L82 PathProgramCache]: Analyzing trace with hash 319032976, now seen corresponding path program 4 times [2018-01-23 14:43:36,716 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:36,716 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:36,717 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:36,717 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:36,717 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:36,734 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:36,830 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:36,830 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:36,837 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:43:36,854 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:36,857 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:36,961 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:36,961 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-01-23 14:43:36,962 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-23 14:43:36,962 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-23 14:43:36,962 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:43:36,963 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2018-01-23 14:43:36,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:36,995 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-01-23 14:43:36,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-23 14:43:36,996 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2018-01-23 14:43:36,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:36,997 INFO L225 Difference]: With dead ends: 32 [2018-01-23 14:43:36,997 INFO L226 Difference]: Without dead ends: 23 [2018-01-23 14:43:36,998 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-01-23 14:43:36,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-01-23 14:43:37,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-01-23 14:43:37,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-01-23 14:43:37,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-01-23 14:43:37,002 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-01-23 14:43:37,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:37,002 INFO L432 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-01-23 14:43:37,002 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-23 14:43:37,002 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-01-23 14:43:37,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-23 14:43:37,003 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:37,003 INFO L322 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:37,003 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:37,003 INFO L82 PathProgramCache]: Analyzing trace with hash -101887477, now seen corresponding path program 5 times [2018-01-23 14:43:37,003 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:37,003 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:37,004 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:37,004 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:37,004 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:37,017 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:37,089 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:37,089 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:37,102 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:43:37,107 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:37,108 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:37,109 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:37,114 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:37,118 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:37,120 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:37,208 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:37,209 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-01-23 14:43:37,209 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-23 14:43:37,209 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-23 14:43:37,209 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-01-23 14:43:37,209 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 16 states. [2018-01-23 14:43:37,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:37,242 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-01-23 14:43:37,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-23 14:43:37,243 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2018-01-23 14:43:37,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:37,243 INFO L225 Difference]: With dead ends: 33 [2018-01-23 14:43:37,243 INFO L226 Difference]: Without dead ends: 24 [2018-01-23 14:43:37,244 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2018-01-23 14:43:37,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-01-23 14:43:37,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-01-23 14:43:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-01-23 14:43:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-01-23 14:43:37,247 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-01-23 14:43:37,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:37,247 INFO L432 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-01-23 14:43:37,248 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-23 14:43:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-01-23 14:43:37,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-23 14:43:37,249 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:37,249 INFO L322 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:37,249 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:37,249 INFO L82 PathProgramCache]: Analyzing trace with hash -265519632, now seen corresponding path program 6 times [2018-01-23 14:43:37,249 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:37,249 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:37,250 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:37,250 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:37,251 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:37,263 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:37,381 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:37,381 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:37,386 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:43:37,396 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:37,398 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:37,399 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:37,400 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:37,401 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:37,402 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:37,469 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:37,470 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-01-23 14:43:37,470 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-23 14:43:37,470 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-23 14:43:37,470 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2018-01-23 14:43:37,471 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 18 states. [2018-01-23 14:43:37,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:37,519 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-01-23 14:43:37,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-23 14:43:37,520 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2018-01-23 14:43:37,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:37,521 INFO L225 Difference]: With dead ends: 34 [2018-01-23 14:43:37,522 INFO L226 Difference]: Without dead ends: 25 [2018-01-23 14:43:37,522 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2018-01-23 14:43:37,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-01-23 14:43:37,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-01-23 14:43:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-01-23 14:43:37,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-01-23 14:43:37,526 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-01-23 14:43:37,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:37,527 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-01-23 14:43:37,527 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-23 14:43:37,527 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-01-23 14:43:37,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-23 14:43:37,528 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:37,528 INFO L322 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:37,528 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:37,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1043149141, now seen corresponding path program 7 times [2018-01-23 14:43:37,528 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:37,529 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:37,530 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:37,530 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:37,530 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:37,542 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:37,651 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:37,651 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:37,657 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:37,676 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:37,828 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:37,828 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-01-23 14:43:37,828 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-23 14:43:37,829 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-23 14:43:37,829 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=229, Unknown=0, NotChecked=0, Total=380 [2018-01-23 14:43:37,829 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 20 states. [2018-01-23 14:43:37,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:37,900 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-01-23 14:43:37,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-23 14:43:37,901 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2018-01-23 14:43:37,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:37,902 INFO L225 Difference]: With dead ends: 35 [2018-01-23 14:43:37,902 INFO L226 Difference]: Without dead ends: 26 [2018-01-23 14:43:37,903 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2018-01-23 14:43:37,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-01-23 14:43:37,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-01-23 14:43:37,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-01-23 14:43:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-01-23 14:43:37,907 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-01-23 14:43:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:37,908 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-01-23 14:43:37,908 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-23 14:43:37,908 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-01-23 14:43:37,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-23 14:43:37,908 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:37,909 INFO L322 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:37,909 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:37,909 INFO L82 PathProgramCache]: Analyzing trace with hash 620139856, now seen corresponding path program 8 times [2018-01-23 14:43:37,909 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:37,909 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:37,910 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:37,910 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:37,910 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:37,922 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:38,073 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:38,073 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:38,081 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:43:38,088 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:38,091 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:38,092 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:38,094 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:38,189 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:38,190 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-01-23 14:43:38,190 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-23 14:43:38,190 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-23 14:43:38,190 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-01-23 14:43:38,191 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 22 states. [2018-01-23 14:43:38,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:38,221 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-01-23 14:43:38,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-23 14:43:38,221 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2018-01-23 14:43:38,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:38,222 INFO L225 Difference]: With dead ends: 36 [2018-01-23 14:43:38,222 INFO L226 Difference]: Without dead ends: 27 [2018-01-23 14:43:38,223 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2018-01-23 14:43:38,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-01-23 14:43:38,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-01-23 14:43:38,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-01-23 14:43:38,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-01-23 14:43:38,226 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-01-23 14:43:38,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:38,226 INFO L432 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-01-23 14:43:38,226 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-23 14:43:38,227 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-01-23 14:43:38,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-23 14:43:38,227 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:38,227 INFO L322 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:38,227 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:38,228 INFO L82 PathProgramCache]: Analyzing trace with hash 642491211, now seen corresponding path program 9 times [2018-01-23 14:43:38,228 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:38,228 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:38,228 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:38,229 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:38,229 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:38,242 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:38,438 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:38,438 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:38,445 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:43:38,454 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:38,457 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:38,458 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:38,465 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:38,466 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:38,468 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:38,468 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:38,470 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:38,580 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:38,581 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2018-01-23 14:43:38,581 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-23 14:43:38,581 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-23 14:43:38,582 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2018-01-23 14:43:38,582 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 24 states. [2018-01-23 14:43:38,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:38,627 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-01-23 14:43:38,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-23 14:43:38,627 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2018-01-23 14:43:38,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:38,628 INFO L225 Difference]: With dead ends: 37 [2018-01-23 14:43:38,628 INFO L226 Difference]: Without dead ends: 28 [2018-01-23 14:43:38,628 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=368, Unknown=0, NotChecked=0, Total=600 [2018-01-23 14:43:38,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-01-23 14:43:38,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-01-23 14:43:38,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-01-23 14:43:38,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-01-23 14:43:38,632 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-01-23 14:43:38,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:38,632 INFO L432 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-01-23 14:43:38,632 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-23 14:43:38,632 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-01-23 14:43:38,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-23 14:43:38,633 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:38,633 INFO L322 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:38,634 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:38,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1335383216, now seen corresponding path program 10 times [2018-01-23 14:43:38,634 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:38,634 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:38,635 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:38,635 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:38,635 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:38,646 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:38,758 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:38,758 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:38,763 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:43:38,774 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:38,776 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:38,872 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:38,872 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2018-01-23 14:43:38,873 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-23 14:43:38,873 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-23 14:43:38,874 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=394, Unknown=0, NotChecked=0, Total=650 [2018-01-23 14:43:38,874 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 26 states. [2018-01-23 14:43:38,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:38,928 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-01-23 14:43:38,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-23 14:43:38,928 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 27 [2018-01-23 14:43:38,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:38,929 INFO L225 Difference]: With dead ends: 38 [2018-01-23 14:43:38,929 INFO L226 Difference]: Without dead ends: 29 [2018-01-23 14:43:38,929 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=271, Invalid=431, Unknown=0, NotChecked=0, Total=702 [2018-01-23 14:43:38,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-01-23 14:43:38,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-01-23 14:43:38,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-01-23 14:43:38,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-01-23 14:43:38,933 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-01-23 14:43:38,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:38,934 INFO L432 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-01-23 14:43:38,934 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-23 14:43:38,934 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-01-23 14:43:38,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-23 14:43:38,935 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:38,935 INFO L322 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:38,935 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:38,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1340198891, now seen corresponding path program 11 times [2018-01-23 14:43:38,935 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:38,936 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:38,936 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:38,936 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:38,937 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:38,947 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:39,071 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:39,071 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:39,076 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:43:39,079 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:39,080 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:39,081 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:39,082 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:39,082 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:39,083 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:39,087 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:39,088 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:39,090 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:39,202 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:39,202 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2018-01-23 14:43:39,202 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-23 14:43:39,203 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-23 14:43:39,203 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=459, Unknown=0, NotChecked=0, Total=756 [2018-01-23 14:43:39,203 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-01-23 14:43:39,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:39,248 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-01-23 14:43:39,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-23 14:43:39,249 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-01-23 14:43:39,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:39,250 INFO L225 Difference]: With dead ends: 39 [2018-01-23 14:43:39,250 INFO L226 Difference]: Without dead ends: 30 [2018-01-23 14:43:39,250 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2018-01-23 14:43:39,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-01-23 14:43:39,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-01-23 14:43:39,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-01-23 14:43:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-01-23 14:43:39,254 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-01-23 14:43:39,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:39,255 INFO L432 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-01-23 14:43:39,255 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-23 14:43:39,255 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-01-23 14:43:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-23 14:43:39,255 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:39,256 INFO L322 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:39,256 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:39,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1489484816, now seen corresponding path program 12 times [2018-01-23 14:43:39,256 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:39,256 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:39,257 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:39,257 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:39,257 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:39,267 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:39,599 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:39,599 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:39,603 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:43:39,610 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:39,612 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:39,613 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:39,614 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:39,615 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:39,616 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:39,617 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:39,617 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:39,619 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:39,734 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:39,735 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2018-01-23 14:43:39,735 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-23 14:43:39,735 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-23 14:43:39,735 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=529, Unknown=0, NotChecked=0, Total=870 [2018-01-23 14:43:39,736 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-01-23 14:43:39,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:39,772 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-01-23 14:43:39,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-23 14:43:39,773 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-01-23 14:43:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:39,773 INFO L225 Difference]: With dead ends: 40 [2018-01-23 14:43:39,773 INFO L226 Difference]: Without dead ends: 31 [2018-01-23 14:43:39,774 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=358, Invalid=572, Unknown=0, NotChecked=0, Total=930 [2018-01-23 14:43:39,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-01-23 14:43:39,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-01-23 14:43:39,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-01-23 14:43:39,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-01-23 14:43:39,778 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-01-23 14:43:39,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:39,778 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-01-23 14:43:39,779 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-23 14:43:39,779 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-01-23 14:43:39,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-23 14:43:39,779 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:39,779 INFO L322 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:39,779 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:39,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1822381195, now seen corresponding path program 13 times [2018-01-23 14:43:39,780 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:39,780 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:39,780 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:39,781 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:39,781 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:39,788 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:39,939 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:39,939 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:39,947 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:39,966 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:40,117 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:40,117 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2018-01-23 14:43:40,118 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-23 14:43:40,118 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-23 14:43:40,118 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=604, Unknown=0, NotChecked=0, Total=992 [2018-01-23 14:43:40,118 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 32 states. [2018-01-23 14:43:40,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:40,164 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-01-23 14:43:40,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-23 14:43:40,164 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 30 [2018-01-23 14:43:40,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:40,165 INFO L225 Difference]: With dead ends: 41 [2018-01-23 14:43:40,166 INFO L226 Difference]: Without dead ends: 32 [2018-01-23 14:43:40,166 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=650, Unknown=0, NotChecked=0, Total=1056 [2018-01-23 14:43:40,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-01-23 14:43:40,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-01-23 14:43:40,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-01-23 14:43:40,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-01-23 14:43:40,170 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-01-23 14:43:40,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:40,171 INFO L432 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-01-23 14:43:40,171 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-23 14:43:40,171 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-01-23 14:43:40,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-23 14:43:40,171 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:40,172 INFO L322 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:40,172 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:40,172 INFO L82 PathProgramCache]: Analyzing trace with hash -742732944, now seen corresponding path program 14 times [2018-01-23 14:43:40,172 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:40,172 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:40,173 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:40,173 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:40,173 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:40,180 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:40,557 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:40,557 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:40,565 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:43:40,575 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:40,579 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:40,580 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:40,583 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:40,739 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:40,739 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2018-01-23 14:43:40,739 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-23 14:43:40,740 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-23 14:43:40,740 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=684, Unknown=0, NotChecked=0, Total=1122 [2018-01-23 14:43:40,740 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 34 states. [2018-01-23 14:43:40,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:40,791 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-01-23 14:43:40,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-23 14:43:40,796 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 31 [2018-01-23 14:43:40,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:40,797 INFO L225 Difference]: With dead ends: 42 [2018-01-23 14:43:40,797 INFO L226 Difference]: Without dead ends: 33 [2018-01-23 14:43:40,798 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=457, Invalid=733, Unknown=0, NotChecked=0, Total=1190 [2018-01-23 14:43:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-01-23 14:43:40,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-01-23 14:43:40,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-01-23 14:43:40,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-01-23 14:43:40,803 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-01-23 14:43:40,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:40,803 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-01-23 14:43:40,803 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-23 14:43:40,803 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-01-23 14:43:40,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-23 14:43:40,804 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:40,804 INFO L322 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:40,804 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:40,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1343107371, now seen corresponding path program 15 times [2018-01-23 14:43:40,804 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:40,805 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:40,805 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:40,806 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:40,806 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:40,814 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:41,010 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:41,010 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:41,015 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:43:41,023 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,025 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,026 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,027 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,028 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,029 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,030 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,031 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,032 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:41,032 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:41,034 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:41,178 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:41,179 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2018-01-23 14:43:41,179 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-23 14:43:41,179 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-23 14:43:41,180 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=769, Unknown=0, NotChecked=0, Total=1260 [2018-01-23 14:43:41,180 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 36 states. [2018-01-23 14:43:41,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:41,228 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-01-23 14:43:41,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-23 14:43:41,228 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 32 [2018-01-23 14:43:41,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:41,229 INFO L225 Difference]: With dead ends: 43 [2018-01-23 14:43:41,229 INFO L226 Difference]: Without dead ends: 34 [2018-01-23 14:43:41,230 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=511, Invalid=821, Unknown=0, NotChecked=0, Total=1332 [2018-01-23 14:43:41,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-01-23 14:43:41,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-01-23 14:43:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-01-23 14:43:41,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-01-23 14:43:41,235 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-01-23 14:43:41,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:41,235 INFO L432 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-01-23 14:43:41,235 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-23 14:43:41,236 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-01-23 14:43:41,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-23 14:43:41,236 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:41,236 INFO L322 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:41,237 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:41,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1579647696, now seen corresponding path program 16 times [2018-01-23 14:43:41,237 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:41,237 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:41,238 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:41,238 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:41,239 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:41,247 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:41,413 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:41,413 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:41,423 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:43:41,435 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:41,437 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:41,629 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:41,629 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2018-01-23 14:43:41,629 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-01-23 14:43:41,629 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-01-23 14:43:41,630 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=859, Unknown=0, NotChecked=0, Total=1406 [2018-01-23 14:43:41,630 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 38 states. [2018-01-23 14:43:41,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:41,676 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-01-23 14:43:41,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-23 14:43:41,676 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 33 [2018-01-23 14:43:41,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:41,676 INFO L225 Difference]: With dead ends: 44 [2018-01-23 14:43:41,677 INFO L226 Difference]: Without dead ends: 35 [2018-01-23 14:43:41,677 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=568, Invalid=914, Unknown=0, NotChecked=0, Total=1482 [2018-01-23 14:43:41,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-01-23 14:43:41,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-01-23 14:43:41,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-23 14:43:41,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-01-23 14:43:41,681 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-01-23 14:43:41,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:41,682 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-01-23 14:43:41,682 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-01-23 14:43:41,682 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-01-23 14:43:41,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-23 14:43:41,682 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:41,683 INFO L322 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:41,683 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:41,683 INFO L82 PathProgramCache]: Analyzing trace with hash 322463179, now seen corresponding path program 17 times [2018-01-23 14:43:41,683 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:41,683 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:41,684 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:41,684 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:41,684 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:41,693 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:41,954 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:41,954 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:41,959 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:43:41,962 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:41,963 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:41,964 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:41,965 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:41,965 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:41,966 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:41,967 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:41,968 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:41,969 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:41,972 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:41,973 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:41,975 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:42,167 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:42,167 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2018-01-23 14:43:42,167 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-23 14:43:42,168 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-23 14:43:42,168 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=954, Unknown=0, NotChecked=0, Total=1560 [2018-01-23 14:43:42,168 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 40 states. [2018-01-23 14:43:42,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:42,213 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-01-23 14:43:42,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-23 14:43:42,214 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 34 [2018-01-23 14:43:42,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:42,214 INFO L225 Difference]: With dead ends: 45 [2018-01-23 14:43:42,214 INFO L226 Difference]: Without dead ends: 36 [2018-01-23 14:43:42,215 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=628, Invalid=1012, Unknown=0, NotChecked=0, Total=1640 [2018-01-23 14:43:42,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-23 14:43:42,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-23 14:43:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-23 14:43:42,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-01-23 14:43:42,219 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-01-23 14:43:42,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:42,219 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-01-23 14:43:42,219 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-23 14:43:42,219 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-01-23 14:43:42,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-23 14:43:42,219 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:42,220 INFO L322 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:42,220 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:42,220 INFO L82 PathProgramCache]: Analyzing trace with hash 4448816, now seen corresponding path program 18 times [2018-01-23 14:43:42,220 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:42,220 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:42,221 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:42,221 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:42,221 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:42,229 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:42,699 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:42,700 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:42,705 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:43:42,713 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:42,715 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:42,716 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:42,720 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:42,721 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:42,722 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:42,723 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:42,724 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:42,725 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:42,727 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:42,727 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:42,729 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:43,010 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:43,010 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2018-01-23 14:43:43,011 INFO L409 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-01-23 14:43:43,011 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-01-23 14:43:43,011 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=1054, Unknown=0, NotChecked=0, Total=1722 [2018-01-23 14:43:43,011 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 42 states. [2018-01-23 14:43:43,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:43,058 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-01-23 14:43:43,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-23 14:43:43,058 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 35 [2018-01-23 14:43:43,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:43,059 INFO L225 Difference]: With dead ends: 46 [2018-01-23 14:43:43,059 INFO L226 Difference]: Without dead ends: 37 [2018-01-23 14:43:43,059 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=691, Invalid=1115, Unknown=0, NotChecked=0, Total=1806 [2018-01-23 14:43:43,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-23 14:43:43,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-23 14:43:43,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-23 14:43:43,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-01-23 14:43:43,064 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-01-23 14:43:43,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:43,064 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-01-23 14:43:43,064 INFO L433 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-01-23 14:43:43,064 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-01-23 14:43:43,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-23 14:43:43,065 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:43,065 INFO L322 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:43,065 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:43,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1264061845, now seen corresponding path program 19 times [2018-01-23 14:43:43,065 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:43,065 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:43,066 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:43,066 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:43,066 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:43,076 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:43,382 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:43,382 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:43,396 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:43,412 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:43,740 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:43,740 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2018-01-23 14:43:43,740 INFO L409 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-01-23 14:43:43,741 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-01-23 14:43:43,741 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=1159, Unknown=0, NotChecked=0, Total=1892 [2018-01-23 14:43:43,741 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 44 states. [2018-01-23 14:43:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:43,789 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-01-23 14:43:43,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-23 14:43:43,789 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 36 [2018-01-23 14:43:43,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:43,790 INFO L225 Difference]: With dead ends: 47 [2018-01-23 14:43:43,790 INFO L226 Difference]: Without dead ends: 38 [2018-01-23 14:43:43,790 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=757, Invalid=1223, Unknown=0, NotChecked=0, Total=1980 [2018-01-23 14:43:43,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-01-23 14:43:43,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-01-23 14:43:43,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-23 14:43:43,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-01-23 14:43:43,793 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-01-23 14:43:43,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:43,794 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-01-23 14:43:43,794 INFO L433 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-01-23 14:43:43,794 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-01-23 14:43:43,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-23 14:43:43,794 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:43,795 INFO L322 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:43,795 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:43,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1933186672, now seen corresponding path program 20 times [2018-01-23 14:43:43,795 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:43,795 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:43,796 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:43,796 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:43,796 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:43,807 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:44,038 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:44,038 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:44,043 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:43:44,050 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:44,054 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:44,056 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:44,057 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:44,266 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:44,266 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2018-01-23 14:43:44,266 INFO L409 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-01-23 14:43:44,266 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-01-23 14:43:44,267 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=801, Invalid=1269, Unknown=0, NotChecked=0, Total=2070 [2018-01-23 14:43:44,267 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 46 states. [2018-01-23 14:43:44,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:44,329 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-01-23 14:43:44,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-23 14:43:44,329 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 37 [2018-01-23 14:43:44,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:44,330 INFO L225 Difference]: With dead ends: 48 [2018-01-23 14:43:44,330 INFO L226 Difference]: Without dead ends: 39 [2018-01-23 14:43:44,330 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=826, Invalid=1336, Unknown=0, NotChecked=0, Total=2162 [2018-01-23 14:43:44,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-23 14:43:44,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-23 14:43:44,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-23 14:43:44,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-01-23 14:43:44,333 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-01-23 14:43:44,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:44,333 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-01-23 14:43:44,333 INFO L433 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-01-23 14:43:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-01-23 14:43:44,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-23 14:43:44,333 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:44,334 INFO L322 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:44,334 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:44,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1201219829, now seen corresponding path program 21 times [2018-01-23 14:43:44,334 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:44,334 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:44,334 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:44,335 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:44,335 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:44,343 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:44,601 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:44,601 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:44,607 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:43:44,614 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:44,616 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:44,617 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:44,618 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:44,620 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:44,621 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:44,622 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:44,623 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:44,624 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:44,625 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:44,626 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:44,627 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:44,627 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:44,629 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:44,838 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:44,839 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2018-01-23 14:43:44,839 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-01-23 14:43:44,839 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-01-23 14:43:44,840 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=872, Invalid=1384, Unknown=0, NotChecked=0, Total=2256 [2018-01-23 14:43:44,840 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 48 states. [2018-01-23 14:43:44,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:44,895 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-01-23 14:43:44,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-23 14:43:44,895 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 38 [2018-01-23 14:43:44,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:44,896 INFO L225 Difference]: With dead ends: 49 [2018-01-23 14:43:44,896 INFO L226 Difference]: Without dead ends: 40 [2018-01-23 14:43:44,897 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=898, Invalid=1454, Unknown=0, NotChecked=0, Total=2352 [2018-01-23 14:43:44,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-23 14:43:44,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-01-23 14:43:44,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-23 14:43:44,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-01-23 14:43:44,900 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-01-23 14:43:44,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:44,900 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-01-23 14:43:44,900 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-01-23 14:43:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-01-23 14:43:44,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-23 14:43:44,901 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:44,901 INFO L322 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:44,901 INFO L371 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:44,901 INFO L82 PathProgramCache]: Analyzing trace with hash 14915824, now seen corresponding path program 22 times [2018-01-23 14:43:44,901 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:44,901 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:44,902 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:44,902 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:44,902 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:44,908 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:45,176 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:45,176 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:45,181 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:43:45,193 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:45,195 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:45,457 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:45,457 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2018-01-23 14:43:45,457 INFO L409 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-01-23 14:43:45,458 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-01-23 14:43:45,458 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=1504, Unknown=0, NotChecked=0, Total=2450 [2018-01-23 14:43:45,458 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 50 states. [2018-01-23 14:43:45,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:45,535 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-01-23 14:43:45,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-23 14:43:45,535 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 39 [2018-01-23 14:43:45,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:45,536 INFO L225 Difference]: With dead ends: 50 [2018-01-23 14:43:45,536 INFO L226 Difference]: Without dead ends: 41 [2018-01-23 14:43:45,536 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=973, Invalid=1577, Unknown=0, NotChecked=0, Total=2550 [2018-01-23 14:43:45,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-23 14:43:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-23 14:43:45,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-23 14:43:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-01-23 14:43:45,541 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-01-23 14:43:45,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:45,541 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-01-23 14:43:45,541 INFO L433 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-01-23 14:43:45,541 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-01-23 14:43:45,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-01-23 14:43:45,542 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:45,542 INFO L322 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:45,542 INFO L371 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:45,542 INFO L82 PathProgramCache]: Analyzing trace with hash -939584597, now seen corresponding path program 23 times [2018-01-23 14:43:45,542 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:45,543 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:45,543 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:45,543 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:45,544 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:45,550 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:45,997 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:45,998 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:46,002 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:43:46,006 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:46,007 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:46,008 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:46,009 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:46,009 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:46,010 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:46,011 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:46,012 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:46,013 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:46,014 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:46,015 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:46,016 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:46,019 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:46,020 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:46,022 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:46,281 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:46,282 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2018-01-23 14:43:46,282 INFO L409 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-01-23 14:43:46,282 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-01-23 14:43:46,283 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=1629, Unknown=0, NotChecked=0, Total=2652 [2018-01-23 14:43:46,283 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 52 states. [2018-01-23 14:43:46,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:46,363 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-01-23 14:43:46,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-23 14:43:46,363 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 40 [2018-01-23 14:43:46,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:46,364 INFO L225 Difference]: With dead ends: 51 [2018-01-23 14:43:46,364 INFO L226 Difference]: Without dead ends: 42 [2018-01-23 14:43:46,365 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1051, Invalid=1705, Unknown=0, NotChecked=0, Total=2756 [2018-01-23 14:43:46,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-01-23 14:43:46,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-01-23 14:43:46,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-23 14:43:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-01-23 14:43:46,367 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-01-23 14:43:46,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:46,368 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-01-23 14:43:46,368 INFO L433 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-01-23 14:43:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-01-23 14:43:46,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-23 14:43:46,368 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:46,368 INFO L322 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:46,368 INFO L371 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:46,368 INFO L82 PathProgramCache]: Analyzing trace with hash -464326576, now seen corresponding path program 24 times [2018-01-23 14:43:46,368 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:46,369 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:46,369 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:46,369 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:46,369 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:46,379 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:46,654 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:46,654 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:46,661 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:43:46,668 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:46,670 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:46,671 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:46,672 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:46,673 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:46,674 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:46,675 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:46,676 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:46,677 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:46,678 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:46,680 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:46,681 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:46,682 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:46,683 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:46,685 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:46,942 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:46,942 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2018-01-23 14:43:46,942 INFO L409 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-01-23 14:43:46,942 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-01-23 14:43:46,943 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1103, Invalid=1759, Unknown=0, NotChecked=0, Total=2862 [2018-01-23 14:43:46,943 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 54 states. [2018-01-23 14:43:47,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:47,005 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-01-23 14:43:47,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-23 14:43:47,006 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 41 [2018-01-23 14:43:47,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:47,006 INFO L225 Difference]: With dead ends: 52 [2018-01-23 14:43:47,007 INFO L226 Difference]: Without dead ends: 43 [2018-01-23 14:43:47,008 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1132, Invalid=1838, Unknown=0, NotChecked=0, Total=2970 [2018-01-23 14:43:47,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-23 14:43:47,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-23 14:43:47,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-23 14:43:47,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-01-23 14:43:47,012 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-01-23 14:43:47,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:47,012 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-01-23 14:43:47,012 INFO L433 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-01-23 14:43:47,012 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-01-23 14:43:47,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-23 14:43:47,013 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:47,013 INFO L322 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:47,013 INFO L371 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:47,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1383770187, now seen corresponding path program 25 times [2018-01-23 14:43:47,014 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:47,014 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:47,015 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:47,015 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:47,015 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:47,026 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:47,379 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:47,379 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:47,384 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:47,399 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:47,662 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:47,662 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2018-01-23 14:43:47,663 INFO L409 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-01-23 14:43:47,663 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-01-23 14:43:47,664 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1186, Invalid=1894, Unknown=0, NotChecked=0, Total=3080 [2018-01-23 14:43:47,664 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 56 states. [2018-01-23 14:43:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:47,753 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-01-23 14:43:47,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-23 14:43:47,792 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 42 [2018-01-23 14:43:47,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:47,793 INFO L225 Difference]: With dead ends: 53 [2018-01-23 14:43:47,793 INFO L226 Difference]: Without dead ends: 44 [2018-01-23 14:43:47,794 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1216, Invalid=1976, Unknown=0, NotChecked=0, Total=3192 [2018-01-23 14:43:47,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-01-23 14:43:47,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-01-23 14:43:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-23 14:43:47,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-01-23 14:43:47,796 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-01-23 14:43:47,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:47,796 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-01-23 14:43:47,796 INFO L433 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-01-23 14:43:47,796 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-01-23 14:43:47,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-01-23 14:43:47,797 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:47,797 INFO L322 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:47,797 INFO L371 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:47,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1454772304, now seen corresponding path program 26 times [2018-01-23 14:43:47,797 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:47,797 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:47,798 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:47,798 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:47,798 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:47,806 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:48,250 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:48,250 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:48,258 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:43:48,268 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:48,279 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:48,282 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:48,285 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:48,723 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:48,724 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2018-01-23 14:43:48,724 INFO L409 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-01-23 14:43:48,724 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-01-23 14:43:48,724 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1272, Invalid=2034, Unknown=0, NotChecked=0, Total=3306 [2018-01-23 14:43:48,725 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 58 states. [2018-01-23 14:43:48,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:48,779 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-01-23 14:43:48,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-23 14:43:48,779 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 43 [2018-01-23 14:43:48,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:48,780 INFO L225 Difference]: With dead ends: 54 [2018-01-23 14:43:48,780 INFO L226 Difference]: Without dead ends: 45 [2018-01-23 14:43:48,780 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1303, Invalid=2119, Unknown=0, NotChecked=0, Total=3422 [2018-01-23 14:43:48,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-23 14:43:48,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-01-23 14:43:48,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-23 14:43:48,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-01-23 14:43:48,783 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-01-23 14:43:48,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:48,783 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-01-23 14:43:48,783 INFO L433 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-01-23 14:43:48,783 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-01-23 14:43:48,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-23 14:43:48,783 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:48,783 INFO L322 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:48,783 INFO L371 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:48,783 INFO L82 PathProgramCache]: Analyzing trace with hash 744723691, now seen corresponding path program 27 times [2018-01-23 14:43:48,784 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:48,784 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:48,784 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:48,784 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:48,784 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:48,795 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:49,209 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:49,209 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:49,214 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:43:49,220 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:49,222 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:49,223 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:49,224 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:49,225 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:49,226 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:49,227 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:49,228 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:49,229 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:49,230 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:49,231 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:49,232 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:49,233 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:49,234 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:49,235 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:49,236 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:49,237 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:49,544 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:49,544 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2018-01-23 14:43:49,545 INFO L409 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-01-23 14:43:49,545 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-01-23 14:43:49,545 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1361, Invalid=2179, Unknown=0, NotChecked=0, Total=3540 [2018-01-23 14:43:49,545 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 60 states. [2018-01-23 14:43:49,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:49,588 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-01-23 14:43:49,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-23 14:43:49,588 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 44 [2018-01-23 14:43:49,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:49,589 INFO L225 Difference]: With dead ends: 55 [2018-01-23 14:43:49,589 INFO L226 Difference]: Without dead ends: 46 [2018-01-23 14:43:49,589 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1393, Invalid=2267, Unknown=0, NotChecked=0, Total=3660 [2018-01-23 14:43:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-23 14:43:49,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-01-23 14:43:49,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-01-23 14:43:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-01-23 14:43:49,591 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-01-23 14:43:49,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:49,592 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-01-23 14:43:49,592 INFO L433 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-01-23 14:43:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-01-23 14:43:49,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-01-23 14:43:49,592 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:49,592 INFO L322 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:49,592 INFO L371 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:49,592 INFO L82 PathProgramCache]: Analyzing trace with hash 209622800, now seen corresponding path program 28 times [2018-01-23 14:43:49,592 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:49,593 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:49,593 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:49,593 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:49,593 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:49,603 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:49,962 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:49,962 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:49,968 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:43:49,983 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:49,984 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:50,302 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:50,302 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2018-01-23 14:43:50,302 INFO L409 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-01-23 14:43:50,303 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-01-23 14:43:50,303 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1453, Invalid=2329, Unknown=0, NotChecked=0, Total=3782 [2018-01-23 14:43:50,303 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 62 states. [2018-01-23 14:43:50,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:50,371 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-01-23 14:43:50,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-01-23 14:43:50,372 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 45 [2018-01-23 14:43:50,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:50,372 INFO L225 Difference]: With dead ends: 56 [2018-01-23 14:43:50,372 INFO L226 Difference]: Without dead ends: 47 [2018-01-23 14:43:50,373 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1486, Invalid=2420, Unknown=0, NotChecked=0, Total=3906 [2018-01-23 14:43:50,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-01-23 14:43:50,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-01-23 14:43:50,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-01-23 14:43:50,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-01-23 14:43:50,376 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-01-23 14:43:50,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:50,376 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-01-23 14:43:50,376 INFO L433 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-01-23 14:43:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-01-23 14:43:50,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-23 14:43:50,377 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:50,377 INFO L322 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:50,377 INFO L371 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:50,377 INFO L82 PathProgramCache]: Analyzing trace with hash 801364363, now seen corresponding path program 29 times [2018-01-23 14:43:50,377 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:50,377 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:50,378 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:50,378 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:50,378 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:50,386 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:50,772 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:50,772 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:50,777 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:43:50,781 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:50,782 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:50,783 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:50,784 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:50,785 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:50,785 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:50,786 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:50,787 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:50,788 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:50,789 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:50,790 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:50,790 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:50,791 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:50,792 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:50,793 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:50,797 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:50,798 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:50,800 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:51,145 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:51,146 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2018-01-23 14:43:51,146 INFO L409 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-01-23 14:43:51,146 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-01-23 14:43:51,147 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1548, Invalid=2484, Unknown=0, NotChecked=0, Total=4032 [2018-01-23 14:43:51,147 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 64 states. [2018-01-23 14:43:51,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:51,230 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-01-23 14:43:51,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-01-23 14:43:51,230 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 46 [2018-01-23 14:43:51,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:51,231 INFO L225 Difference]: With dead ends: 57 [2018-01-23 14:43:51,231 INFO L226 Difference]: Without dead ends: 48 [2018-01-23 14:43:51,232 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1582, Invalid=2578, Unknown=0, NotChecked=0, Total=4160 [2018-01-23 14:43:51,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-01-23 14:43:51,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-01-23 14:43:51,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-23 14:43:51,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-01-23 14:43:51,234 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-01-23 14:43:51,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:51,234 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-01-23 14:43:51,235 INFO L433 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-01-23 14:43:51,235 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-01-23 14:43:51,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-01-23 14:43:51,235 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:51,235 INFO L322 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:51,235 INFO L371 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:51,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1965483632, now seen corresponding path program 30 times [2018-01-23 14:43:51,235 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:51,235 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:51,236 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:51,236 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:51,236 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:51,247 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:51,637 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:51,637 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:51,642 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:43:51,649 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,651 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,652 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,653 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,654 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,655 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,656 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,657 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,659 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,660 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,661 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,662 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,663 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,664 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,666 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,667 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:51,667 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:51,669 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:52,022 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:52,022 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2018-01-23 14:43:52,023 INFO L409 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-01-23 14:43:52,023 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-01-23 14:43:52,023 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1646, Invalid=2644, Unknown=0, NotChecked=0, Total=4290 [2018-01-23 14:43:52,024 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 66 states. [2018-01-23 14:43:52,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:52,096 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-01-23 14:43:52,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-23 14:43:52,096 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 47 [2018-01-23 14:43:52,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:52,097 INFO L225 Difference]: With dead ends: 58 [2018-01-23 14:43:52,097 INFO L226 Difference]: Without dead ends: 49 [2018-01-23 14:43:52,098 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2005 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1681, Invalid=2741, Unknown=0, NotChecked=0, Total=4422 [2018-01-23 14:43:52,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-23 14:43:52,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-01-23 14:43:52,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-23 14:43:52,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-01-23 14:43:52,100 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-01-23 14:43:52,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:52,100 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-01-23 14:43:52,100 INFO L433 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-01-23 14:43:52,100 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-01-23 14:43:52,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-23 14:43:52,101 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:52,101 INFO L322 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:52,101 INFO L371 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:52,101 INFO L82 PathProgramCache]: Analyzing trace with hash -601524693, now seen corresponding path program 31 times [2018-01-23 14:43:52,101 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:52,101 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:52,102 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:52,102 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:52,102 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:52,115 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:52,522 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:52,522 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:52,528 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:52,542 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:52,957 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:52,957 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2018-01-23 14:43:52,957 INFO L409 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-01-23 14:43:52,957 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-01-23 14:43:52,958 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1747, Invalid=2809, Unknown=0, NotChecked=0, Total=4556 [2018-01-23 14:43:52,958 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 68 states. [2018-01-23 14:43:53,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:53,059 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-01-23 14:43:53,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-01-23 14:43:53,060 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 48 [2018-01-23 14:43:53,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:53,060 INFO L225 Difference]: With dead ends: 59 [2018-01-23 14:43:53,061 INFO L226 Difference]: Without dead ends: 50 [2018-01-23 14:43:53,061 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1783, Invalid=2909, Unknown=0, NotChecked=0, Total=4692 [2018-01-23 14:43:53,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-23 14:43:53,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-01-23 14:43:53,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-23 14:43:53,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-01-23 14:43:53,064 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-01-23 14:43:53,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:53,064 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-01-23 14:43:53,064 INFO L433 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-01-23 14:43:53,064 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-01-23 14:43:53,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-01-23 14:43:53,065 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:53,065 INFO L322 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:53,065 INFO L371 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:53,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1425595856, now seen corresponding path program 32 times [2018-01-23 14:43:53,065 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:53,065 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:53,066 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:53,066 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:53,066 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:53,080 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:53,560 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:53,560 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:53,565 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:43:53,573 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:53,580 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:53,582 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:53,584 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:53,981 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:53,981 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2018-01-23 14:43:53,982 INFO L409 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-01-23 14:43:53,982 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-01-23 14:43:53,983 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1851, Invalid=2979, Unknown=0, NotChecked=0, Total=4830 [2018-01-23 14:43:53,983 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 70 states. [2018-01-23 14:43:54,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:54,073 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-01-23 14:43:54,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-01-23 14:43:54,073 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 49 [2018-01-23 14:43:54,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:54,074 INFO L225 Difference]: With dead ends: 60 [2018-01-23 14:43:54,074 INFO L226 Difference]: Without dead ends: 51 [2018-01-23 14:43:54,074 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1888, Invalid=3082, Unknown=0, NotChecked=0, Total=4970 [2018-01-23 14:43:54,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-23 14:43:54,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-01-23 14:43:54,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-01-23 14:43:54,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-01-23 14:43:54,076 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-01-23 14:43:54,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:54,077 INFO L432 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-01-23 14:43:54,077 INFO L433 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-01-23 14:43:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-01-23 14:43:54,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-01-23 14:43:54,077 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:54,077 INFO L322 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:54,077 INFO L371 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:54,077 INFO L82 PathProgramCache]: Analyzing trace with hash -158176565, now seen corresponding path program 33 times [2018-01-23 14:43:54,078 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:54,078 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:54,078 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:54,078 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:54,078 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:54,086 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:54,573 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:54,573 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:54,584 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:43:54,592 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:54,594 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:54,595 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:54,596 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:54,597 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:54,598 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:54,599 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:54,600 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:54,601 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:54,603 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:54,604 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:54,605 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:54,607 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:54,608 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:54,609 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:54,611 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:54,612 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:54,613 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:43:54,614 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:54,616 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:55,019 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:55,019 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 72 [2018-01-23 14:43:55,019 INFO L409 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-01-23 14:43:55,020 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-01-23 14:43:55,020 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1958, Invalid=3154, Unknown=0, NotChecked=0, Total=5112 [2018-01-23 14:43:55,020 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 72 states. [2018-01-23 14:43:55,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:55,078 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-01-23 14:43:55,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-01-23 14:43:55,079 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 50 [2018-01-23 14:43:55,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:55,079 INFO L225 Difference]: With dead ends: 61 [2018-01-23 14:43:55,079 INFO L226 Difference]: Without dead ends: 52 [2018-01-23 14:43:55,079 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1996, Invalid=3260, Unknown=0, NotChecked=0, Total=5256 [2018-01-23 14:43:55,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-01-23 14:43:55,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-01-23 14:43:55,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-23 14:43:55,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-01-23 14:43:55,082 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-01-23 14:43:55,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:55,082 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-01-23 14:43:55,082 INFO L433 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-01-23 14:43:55,082 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-01-23 14:43:55,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-01-23 14:43:55,082 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:55,082 INFO L322 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:55,082 INFO L371 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:55,083 INFO L82 PathProgramCache]: Analyzing trace with hash -2010481360, now seen corresponding path program 34 times [2018-01-23 14:43:55,083 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:55,083 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:55,083 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:55,083 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:55,083 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:55,091 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:55,547 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:55,547 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:55,552 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:43:55,570 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:55,572 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:56,001 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:56,001 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 74 [2018-01-23 14:43:56,002 INFO L409 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-01-23 14:43:56,002 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-01-23 14:43:56,002 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2068, Invalid=3334, Unknown=0, NotChecked=0, Total=5402 [2018-01-23 14:43:56,002 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 74 states. [2018-01-23 14:43:56,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:56,072 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-01-23 14:43:56,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-01-23 14:43:56,073 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 51 [2018-01-23 14:43:56,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:56,073 INFO L225 Difference]: With dead ends: 62 [2018-01-23 14:43:56,073 INFO L226 Difference]: Without dead ends: 53 [2018-01-23 14:43:56,074 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2545 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2107, Invalid=3443, Unknown=0, NotChecked=0, Total=5550 [2018-01-23 14:43:56,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-01-23 14:43:56,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-01-23 14:43:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-23 14:43:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-01-23 14:43:56,076 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-01-23 14:43:56,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:56,076 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-01-23 14:43:56,076 INFO L433 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-01-23 14:43:56,077 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-01-23 14:43:56,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-23 14:43:56,077 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:56,077 INFO L322 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:56,077 INFO L371 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:56,077 INFO L82 PathProgramCache]: Analyzing trace with hash 697612139, now seen corresponding path program 35 times [2018-01-23 14:43:56,078 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:56,078 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:56,078 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:56,078 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:56,078 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:56,090 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:56,684 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:56,684 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:56,689 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:43:56,694 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:56,695 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:56,695 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:56,696 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:56,697 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:56,698 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:56,698 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:56,699 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:56,700 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:56,701 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:56,702 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:56,703 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:56,703 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:56,704 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:56,705 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:56,706 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:56,707 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:56,708 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:56,712 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:43:56,714 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:56,716 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:57,257 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:57,257 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 76 [2018-01-23 14:43:57,257 INFO L409 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-01-23 14:43:57,258 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-01-23 14:43:57,258 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2181, Invalid=3519, Unknown=0, NotChecked=0, Total=5700 [2018-01-23 14:43:57,258 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 76 states. [2018-01-23 14:43:57,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:57,388 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-01-23 14:43:57,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-01-23 14:43:57,389 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 52 [2018-01-23 14:43:57,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:57,390 INFO L225 Difference]: With dead ends: 63 [2018-01-23 14:43:57,390 INFO L226 Difference]: Without dead ends: 54 [2018-01-23 14:43:57,391 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2221, Invalid=3631, Unknown=0, NotChecked=0, Total=5852 [2018-01-23 14:43:57,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-23 14:43:57,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-01-23 14:43:57,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-23 14:43:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-01-23 14:43:57,395 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-01-23 14:43:57,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:57,395 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-01-23 14:43:57,395 INFO L433 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-01-23 14:43:57,395 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-01-23 14:43:57,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-01-23 14:43:57,396 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:57,396 INFO L322 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:57,396 INFO L371 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:57,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1250835312, now seen corresponding path program 36 times [2018-01-23 14:43:57,396 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:57,396 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:57,397 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:57,397 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:57,397 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:57,411 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:58,106 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:58,148 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:58,154 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:43:58,163 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:58,165 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:58,166 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:58,168 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:58,169 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:58,171 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:58,172 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:58,174 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:58,175 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:58,177 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:58,179 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:58,180 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:58,182 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:58,184 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:58,186 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:58,188 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:58,190 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:58,192 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:58,194 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:43:58,194 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:43:58,197 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:58,689 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:58,689 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2018-01-23 14:43:58,689 INFO L409 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-01-23 14:43:58,690 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-01-23 14:43:58,690 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2297, Invalid=3709, Unknown=0, NotChecked=0, Total=6006 [2018-01-23 14:43:58,690 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 78 states. [2018-01-23 14:43:58,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:58,750 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-01-23 14:43:58,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-01-23 14:43:58,751 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 53 [2018-01-23 14:43:58,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:58,752 INFO L225 Difference]: With dead ends: 64 [2018-01-23 14:43:58,752 INFO L226 Difference]: Without dead ends: 55 [2018-01-23 14:43:58,752 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2839 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2338, Invalid=3824, Unknown=0, NotChecked=0, Total=6162 [2018-01-23 14:43:58,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-23 14:43:58,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-01-23 14:43:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-23 14:43:58,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-01-23 14:43:58,755 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-01-23 14:43:58,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:58,755 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-01-23 14:43:58,755 INFO L433 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-01-23 14:43:58,756 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-01-23 14:43:58,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-01-23 14:43:58,756 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:58,756 INFO L322 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:58,756 INFO L371 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:58,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1523164149, now seen corresponding path program 37 times [2018-01-23 14:43:58,757 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:58,757 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:58,757 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:58,758 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:43:58,758 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:58,769 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:43:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:59,293 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:43:59,293 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:43:59,298 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:59,320 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:43:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:43:59,807 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:43:59,807 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2018-01-23 14:43:59,808 INFO L409 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-01-23 14:43:59,808 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-01-23 14:43:59,808 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2416, Invalid=3904, Unknown=0, NotChecked=0, Total=6320 [2018-01-23 14:43:59,808 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 80 states. [2018-01-23 14:43:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:43:59,886 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-01-23 14:43:59,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-01-23 14:43:59,887 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 54 [2018-01-23 14:43:59,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:43:59,887 INFO L225 Difference]: With dead ends: 65 [2018-01-23 14:43:59,887 INFO L226 Difference]: Without dead ends: 56 [2018-01-23 14:43:59,888 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2458, Invalid=4022, Unknown=0, NotChecked=0, Total=6480 [2018-01-23 14:43:59,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-23 14:43:59,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-01-23 14:43:59,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-23 14:43:59,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-01-23 14:43:59,891 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-01-23 14:43:59,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:43:59,891 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-01-23 14:43:59,891 INFO L433 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-01-23 14:43:59,891 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-01-23 14:43:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-01-23 14:43:59,892 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:43:59,892 INFO L322 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:43:59,892 INFO L371 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:43:59,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1375423504, now seen corresponding path program 38 times [2018-01-23 14:43:59,892 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:43:59,893 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:43:59,893 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:59,893 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:43:59,893 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:43:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:43:59,908 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:00,517 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:00,517 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:00,521 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:00,529 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:00,538 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:00,540 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:00,543 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:01,160 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:01,160 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2018-01-23 14:44:01,160 INFO L409 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-01-23 14:44:01,160 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-01-23 14:44:01,161 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2538, Invalid=4104, Unknown=0, NotChecked=0, Total=6642 [2018-01-23 14:44:01,161 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 82 states. [2018-01-23 14:44:01,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:01,227 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-01-23 14:44:01,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-01-23 14:44:01,227 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 55 [2018-01-23 14:44:01,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:01,228 INFO L225 Difference]: With dead ends: 66 [2018-01-23 14:44:01,228 INFO L226 Difference]: Without dead ends: 57 [2018-01-23 14:44:01,228 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3149 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2581, Invalid=4225, Unknown=0, NotChecked=0, Total=6806 [2018-01-23 14:44:01,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-23 14:44:01,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-01-23 14:44:01,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-23 14:44:01,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-01-23 14:44:01,231 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-01-23 14:44:01,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:01,231 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-01-23 14:44:01,231 INFO L433 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-01-23 14:44:01,231 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-01-23 14:44:01,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-23 14:44:01,231 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:01,231 INFO L322 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:01,232 INFO L371 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:01,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1090430805, now seen corresponding path program 39 times [2018-01-23 14:44:01,232 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:01,232 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:01,232 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:01,232 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:01,233 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:01,242 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:01,862 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:01,863 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:01,868 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:44:01,876 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,878 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,879 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,880 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,881 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,882 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,883 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,884 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,885 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,886 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,888 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,889 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,890 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,891 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,893 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,894 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,895 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,897 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,898 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,900 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,901 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:01,902 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:01,904 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:02,413 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:02,413 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 84 [2018-01-23 14:44:02,413 INFO L409 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-01-23 14:44:02,414 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-01-23 14:44:02,414 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2663, Invalid=4309, Unknown=0, NotChecked=0, Total=6972 [2018-01-23 14:44:02,414 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 84 states. [2018-01-23 14:44:02,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:02,488 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-01-23 14:44:02,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-01-23 14:44:02,488 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 56 [2018-01-23 14:44:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:02,488 INFO L225 Difference]: With dead ends: 67 [2018-01-23 14:44:02,488 INFO L226 Difference]: Without dead ends: 58 [2018-01-23 14:44:02,489 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3310 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2707, Invalid=4433, Unknown=0, NotChecked=0, Total=7140 [2018-01-23 14:44:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-01-23 14:44:02,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-01-23 14:44:02,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-23 14:44:02,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-01-23 14:44:02,492 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-01-23 14:44:02,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:02,492 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-01-23 14:44:02,492 INFO L433 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-01-23 14:44:02,492 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-01-23 14:44:02,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-01-23 14:44:02,493 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:02,493 INFO L322 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:02,493 INFO L371 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:02,493 INFO L82 PathProgramCache]: Analyzing trace with hash -845591728, now seen corresponding path program 40 times [2018-01-23 14:44:02,493 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:02,493 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:02,493 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:02,493 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:02,494 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:44:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:44:02,524 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:44:02,531 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:44:02,537 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) [2018-01-23 14:44:02,538 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:44:02,538 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:44:02,544 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:44:02,544 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:44:02,545 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:44:02,545 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:44:02,545 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:44:02,545 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:44:02,545 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:44:02,545 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-23 14:44:02,545 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:44:02,546 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-01-23 14:44:02,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-23 14:44:02,546 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:02,546 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:02,547 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-23 14:44:02,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1259858052, now seen corresponding path program 1 times [2018-01-23 14:44:02,547 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:02,547 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:02,547 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:02,548 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:02,548 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:02,551 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:02,573 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:44:02,573 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-23 14:44:02,573 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-23 14:44:02,573 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-23 14:44:02,573 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-23 14:44:02,573 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 4 states. [2018-01-23 14:44:02,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:02,582 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-01-23 14:44:02,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-23 14:44:02,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-01-23 14:44:02,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:02,583 INFO L225 Difference]: With dead ends: 33 [2018-01-23 14:44:02,583 INFO L226 Difference]: Without dead ends: 17 [2018-01-23 14:44:02,583 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:44:02,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-01-23 14:44:02,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-01-23 14:44:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-01-23 14:44:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-01-23 14:44:02,585 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-01-23 14:44:02,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:02,585 INFO L432 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-01-23 14:44:02,585 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-23 14:44:02,585 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-01-23 14:44:02,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-23 14:44:02,586 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:02,586 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:02,586 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-23 14:44:02,586 INFO L82 PathProgramCache]: Analyzing trace with hash -956542153, now seen corresponding path program 1 times [2018-01-23 14:44:02,586 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:02,586 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:02,587 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:02,587 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:02,587 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:02,591 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:02,609 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:02,610 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:02,615 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:02,623 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:02,654 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:02,654 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-01-23 14:44:02,654 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-23 14:44:02,654 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-23 14:44:02,654 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-23 14:44:02,654 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2018-01-23 14:44:02,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:02,665 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-01-23 14:44:02,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:44:02,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2018-01-23 14:44:02,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:02,665 INFO L225 Difference]: With dead ends: 25 [2018-01-23 14:44:02,665 INFO L226 Difference]: Without dead ends: 18 [2018-01-23 14:44:02,666 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-01-23 14:44:02,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-01-23 14:44:02,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-01-23 14:44:02,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-01-23 14:44:02,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-01-23 14:44:02,667 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-01-23 14:44:02,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:02,668 INFO L432 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-01-23 14:44:02,668 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-23 14:44:02,668 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-01-23 14:44:02,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-23 14:44:02,668 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:02,668 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:02,668 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-23 14:44:02,669 INFO L82 PathProgramCache]: Analyzing trace with hash -143683876, now seen corresponding path program 2 times [2018-01-23 14:44:02,669 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:02,669 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:02,669 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:02,669 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:02,669 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:02,673 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:02,694 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:02,694 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:02,703 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:02,709 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:02,710 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:02,711 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:02,766 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:44:02,774 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2018-01-23 14:44:02,774 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-23 14:44:02,776 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-01-23 14:44:02,776 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2018-01-23 14:44:02,824 WARN L1029 $PredicateComparison]: unable to prove that (exists ((|main_~#cstats~2.base| Int)) (and (= (select |c_old(#valid)| |main_~#cstats~2.base|) 0) (= |c_#valid| (store |c_old(#valid)| |main_~#cstats~2.base| 0)))) is different from true [2018-01-23 14:44:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-23 14:44:02,859 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-23 14:44:02,860 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2018-01-23 14:44:02,860 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:44:02,860 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:44:02,860 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=52, Unknown=1, NotChecked=14, Total=90 [2018-01-23 14:44:02,860 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2018-01-23 14:44:02,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:02,997 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-01-23 14:44:02,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-23 14:44:02,997 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-01-23 14:44:02,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:02,997 INFO L225 Difference]: With dead ends: 25 [2018-01-23 14:44:02,997 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:44:02,998 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=149, Unknown=1, NotChecked=26, Total=240 [2018-01-23 14:44:02,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:44:02,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:44:02,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:44:02,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:44:02,999 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2018-01-23 14:44:02,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:02,999 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:44:02,999 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:44:02,999 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:44:02,999 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:44:03,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.01 02:44:03 BoogieIcfgContainer [2018-01-23 14:44:03,002 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-23 14:44:03,002 INFO L168 Benchmark]: Toolchain (without parser) took 28063.95 ms. Allocated memory was 299.4 MB in the beginning and 728.8 MB in the end (delta: 429.4 MB). Free memory was 260.3 MB in the beginning and 337.7 MB in the end (delta: -77.4 MB). Peak memory consumption was 352.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:44:03,004 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 299.4 MB. Free memory is still 265.3 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 14:44:03,004 INFO L168 Benchmark]: CACSL2BoogieTranslator took 165.36 ms. Allocated memory is still 299.4 MB. Free memory was 259.3 MB in the beginning and 252.3 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:44:03,004 INFO L168 Benchmark]: Boogie Preprocessor took 28.38 ms. Allocated memory is still 299.4 MB. Free memory was 252.3 MB in the beginning and 250.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:44:03,004 INFO L168 Benchmark]: RCFGBuilder took 184.90 ms. Allocated memory is still 299.4 MB. Free memory was 250.3 MB in the beginning and 238.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:44:03,004 INFO L168 Benchmark]: TraceAbstraction took 27679.45 ms. Allocated memory was 299.4 MB in the beginning and 728.8 MB in the end (delta: 429.4 MB). Free memory was 237.3 MB in the beginning and 337.7 MB in the end (delta: -100.4 MB). Peak memory consumption was 329.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:44:03,006 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 299.4 MB. Free memory is still 265.3 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 165.36 ms. Allocated memory is still 299.4 MB. Free memory was 259.3 MB in the beginning and 252.3 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 28.38 ms. Allocated memory is still 299.4 MB. Free memory was 252.3 MB in the beginning and 250.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 184.90 ms. Allocated memory is still 299.4 MB. Free memory was 250.3 MB in the beginning and 238.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 27679.45 ms. Allocated memory was 299.4 MB in the beginning and 728.8 MB in the end (delta: 429.4 MB). Free memory was 237.3 MB in the beginning and 337.7 MB in the end (delta: -100.4 MB). Peak memory consumption was 329.0 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 21 locations, 3 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L21] FCALL struct compstat cstats ; VAL [cstats={42:0}] [L22] FCALL memset((void *)(& cstats), 0, 40UL) VAL [cstats={42:0}, memset((void *)(& cstats), 0, 40UL)={42:0}] [L23] return 0; VAL [\result=0, cstats={42:0}] [L23] return 0; - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 21 locations, 3 error locations. UNSAFE Result, 26.9s OverallTime, 41 OverallIterations, 40 TraceHistogramMax, 2.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 643 SDtfs, 128 SDslu, 13725 SDs, 0 SdLazy, 3244 SolverSat, 143 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2384 GetRequests, 626 SyntacticMatches, 0 SemanticMatches, 1758 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46345 ImplicationChecksByTransitivity, 20.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 40 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 21.5s InterpolantComputationTime, 2960 NumberOfCodeBlocks, 2960 NumberOfCodeBlocksAsserted, 296 NumberOfCheckSat, 2824 ConstructedInterpolants, 0 QuantifiedInterpolants, 428188 SizeOfPredicates, 39 NumberOfNonLiveVariables, 4719 ConjunctsInSsa, 897 ConjunctsInUnsatCore, 79 InterpolantComputations, 1 PerfectInterpolantSequences, 0/21320 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 21 locations, 3 error locations. SAFE Result, 0.4s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 42 SDtfs, 13 SDslu, 91 SDs, 0 SdLazy, 64 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 81 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 76 ConstructedInterpolants, 8 QuantifiedInterpolants, 3391 SizeOfPredicates, 4 NumberOfNonLiveVariables, 119 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 3/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset2_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-23_14-44-03-013.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset2_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-23_14-44-03-013.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset2_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-23_14-44-03-013.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset2_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-23_14-44-03-013.csv Received shutdown request...