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/memsafety/960521-1_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 14:25:43,168 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 14:25:43,169 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 14:25:43,185 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 14:25:43,185 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 14:25:43,187 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 14:25:43,188 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 14:25:43,189 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 14:25:43,191 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 14:25:43,192 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 14:25:43,193 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 14:25:43,193 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 14:25:43,194 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 14:25:43,195 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 14:25:43,196 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 14:25:43,199 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 14:25:43,201 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 14:25:43,204 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 14:25:43,205 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 14:25:43,206 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 14:25:43,209 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-23 14:25:43,209 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-23 14:25:43,209 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-23 14:25:43,211 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-23 14:25:43,211 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-23 14:25:43,213 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-23 14:25:43,213 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-23 14:25:43,214 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-23 14:25:43,214 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-23 14:25:43,214 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 14:25:43,215 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 14:25:43,215 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 14:25:43,224 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 14:25:43,224 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 14:25:43,225 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 14:25:43,225 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 14:25:43,225 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 14:25:43,225 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 14:25:43,226 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 14:25:43,226 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 14:25:43,226 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 14:25:43,226 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 14:25:43,226 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 14:25:43,226 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 14:25:43,227 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 14:25:43,227 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 14:25:43,227 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 14:25:43,227 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 14:25:43,227 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 14:25:43,227 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 14:25:43,227 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 14:25:43,228 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 14:25:43,228 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 14:25:43,228 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 14:25:43,228 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 14:25:43,228 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 14:25:43,228 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 14:25:43,229 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:25:43,229 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 14:25:43,229 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 14:25:43,229 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 14:25:43,229 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 14:25:43,229 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 14:25:43,230 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 14:25:43,230 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 14:25:43,230 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 14:25:43,230 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 14:25:43,231 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 14:25:43,231 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 14:25:43,265 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 14:25:43,277 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 14:25:43,280 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 14:25:43,282 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 14:25:43,282 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 14:25:43,283 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/960521-1_true-valid-memsafety.i [2018-01-23 14:25:43,465 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 14:25:43,470 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 14:25:43,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 14:25:43,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 14:25:43,477 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 14:25:43,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:25:43" (1/1) ... [2018-01-23 14:25:43,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3adf5c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:25:43, skipping insertion in model container [2018-01-23 14:25:43,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:25:43" (1/1) ... [2018-01-23 14:25:43,495 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:25:43,537 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:25:43,661 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:25:43,677 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:25:43,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:25:43 WrapperNode [2018-01-23 14:25:43,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 14:25:43,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 14:25:43,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 14:25:43,683 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 14:25:43,695 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:25:43" (1/1) ... [2018-01-23 14:25:43,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:25:43" (1/1) ... [2018-01-23 14:25:43,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:25:43" (1/1) ... [2018-01-23 14:25:43,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:25:43" (1/1) ... [2018-01-23 14:25:43,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:25:43" (1/1) ... [2018-01-23 14:25:43,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:25:43" (1/1) ... [2018-01-23 14:25:43,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:25:43" (1/1) ... [2018-01-23 14:25:43,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 14:25:43,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 14:25:43,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 14:25:43,717 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 14:25:43,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:25:43" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:25:43,775 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 14:25:43,775 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 14:25:43,775 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-23 14:25:43,775 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 14:25:43,775 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-23 14:25:43,775 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-23 14:25:43,776 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 14:25:43,776 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 14:25:43,776 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 14:25:43,776 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-23 14:25:43,776 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-23 14:25:43,776 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-23 14:25:43,777 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 14:25:43,777 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 14:25:43,777 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 14:25:43,969 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 14:25:43,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:25:43 BoogieIcfgContainer [2018-01-23 14:25:43,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 14:25:43,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-23 14:25:43,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-23 14:25:43,974 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-23 14:25:43,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 02:25:43" (1/3) ... [2018-01-23 14:25:43,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232396f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:25:43, skipping insertion in model container [2018-01-23 14:25:43,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:25:43" (2/3) ... [2018-01-23 14:25:43,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232396f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:25:43, skipping insertion in model container [2018-01-23 14:25:43,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:25:43" (3/3) ... [2018-01-23 14:25:43,978 INFO L105 eAbstractionObserver]: Analyzing ICFG 960521-1_true-valid-memsafety.i [2018-01-23 14:25:43,988 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-23 14:25:43,995 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-23 14:25:44,048 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:25:44,048 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:25:44,048 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:25:44,048 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:25:44,048 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:25:44,049 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:25:44,049 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:25:44,049 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-23 14:25:44,050 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:25:44,067 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-23 14:25:44,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-23 14:25:44,073 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:44,074 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-23 14:25:44,075 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-23 14:25:44,078 INFO L82 PathProgramCache]: Analyzing trace with hash 90336, now seen corresponding path program 1 times [2018-01-23 14:25:44,080 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:44,081 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:44,125 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:44,125 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:25:44,125 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:25:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:25:44,197 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:25:44,205 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:25:44,216 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:25:44,217 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:25:44,217 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:25:44,217 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:25:44,217 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:25:44,217 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:25:44,218 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:25:44,218 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-23 14:25:44,218 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:25:44,220 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-23 14:25:44,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-23 14:25:44,221 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:44,221 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 14:25:44,221 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-23 14:25:44,222 INFO L82 PathProgramCache]: Analyzing trace with hash 935443697, now seen corresponding path program 1 times [2018-01-23 14:25:44,222 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:44,222 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:44,223 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:44,223 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:25:44,223 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:44,259 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:44,306 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 14:25:44,308 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:25:44,308 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:25:44,310 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:25:44,322 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:25:44,323 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:25:44,325 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-01-23 14:25:44,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:25:44,344 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2018-01-23 14:25:44,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:25:44,414 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-01-23 14:25:44,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:25:44,422 INFO L225 Difference]: With dead ends: 60 [2018-01-23 14:25:44,423 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:25:44,426 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:25:44,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:25:44,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:25:44,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:25:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:25:44,448 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-01-23 14:25:44,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:25:44,448 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:25:44,448 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:25:44,448 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:25:44,448 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:25:44,451 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:25:44,451 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:25:44,451 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:25:44,452 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:25:44,452 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:25:44,452 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:25:44,452 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:25:44,452 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-23 14:25:44,452 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:25:44,454 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-23 14:25:44,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-23 14:25:44,456 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:44,456 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:25:44,456 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:25:44,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1172106943, now seen corresponding path program 1 times [2018-01-23 14:25:44,456 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:44,457 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:44,458 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:44,458 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:25:44,458 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:44,478 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:44,504 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 14:25:44,505 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:25:44,505 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:25:44,505 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:25:44,506 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:25:44,506 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:25:44,506 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-01-23 14:25:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:25:44,511 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2018-01-23 14:25:44,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:25:44,512 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2018-01-23 14:25:44,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:25:44,516 INFO L225 Difference]: With dead ends: 60 [2018-01-23 14:25:44,516 INFO L226 Difference]: Without dead ends: 36 [2018-01-23 14:25:44,517 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:25:44,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-23 14:25:44,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-23 14:25:44,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-23 14:25:44,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-01-23 14:25:44,529 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2018-01-23 14:25:44,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:25:44,529 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-01-23 14:25:44,529 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:25:44,529 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-01-23 14:25:44,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-23 14:25:44,530 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:44,530 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:25:44,530 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:25:44,531 INFO L82 PathProgramCache]: Analyzing trace with hash -862637837, now seen corresponding path program 1 times [2018-01-23 14:25:44,531 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:44,531 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:44,532 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:44,532 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:25:44,532 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:44,555 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:44,615 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 14:25:44,615 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:25:44,615 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-23 14:25:44,616 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-23 14:25:44,617 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-23 14:25:44,617 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-23 14:25:44,617 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 3 states. [2018-01-23 14:25:44,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:25:44,671 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-01-23 14:25:44,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-23 14:25:44,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2018-01-23 14:25:44,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:25:44,673 INFO L225 Difference]: With dead ends: 58 [2018-01-23 14:25:44,674 INFO L226 Difference]: Without dead ends: 45 [2018-01-23 14:25:44,675 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-23 14:25:44,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-23 14:25:44,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2018-01-23 14:25:44,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-23 14:25:44,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-01-23 14:25:44,681 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 29 [2018-01-23 14:25:44,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:25:44,682 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-01-23 14:25:44,682 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-23 14:25:44,682 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-01-23 14:25:44,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-23 14:25:44,683 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:44,683 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:25:44,684 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:25:44,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1162981958, now seen corresponding path program 1 times [2018-01-23 14:25:44,684 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:44,684 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:44,685 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:44,685 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:25:44,685 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:44,706 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-23 14:25:44,785 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:25:44,785 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-23 14:25:44,786 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-23 14:25:44,786 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-23 14:25:44,786 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:25:44,786 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 5 states. [2018-01-23 14:25:44,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:25:44,878 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-01-23 14:25:44,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-23 14:25:44,878 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2018-01-23 14:25:44,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:25:44,879 INFO L225 Difference]: With dead ends: 43 [2018-01-23 14:25:44,879 INFO L226 Difference]: Without dead ends: 36 [2018-01-23 14:25:44,880 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-01-23 14:25:44,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-23 14:25:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-23 14:25:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-23 14:25:44,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-01-23 14:25:44,883 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2018-01-23 14:25:44,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:25:44,884 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-01-23 14:25:44,884 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-23 14:25:44,884 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-01-23 14:25:44,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-23 14:25:44,885 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:44,885 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:25:44,885 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:25:44,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1789723842, now seen corresponding path program 1 times [2018-01-23 14:25:44,885 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:44,885 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:44,886 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:44,886 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:25:44,886 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:44,902 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-23 14:25:44,946 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:25:44,946 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-23 14:25:44,947 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-23 14:25:44,947 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-23 14:25:44,947 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:25:44,947 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 5 states. [2018-01-23 14:25:45,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:25:45,043 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-01-23 14:25:45,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:25:45,043 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2018-01-23 14:25:45,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:25:45,044 INFO L225 Difference]: With dead ends: 60 [2018-01-23 14:25:45,045 INFO L226 Difference]: Without dead ends: 42 [2018-01-23 14:25:45,045 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-23 14:25:45,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-01-23 14:25:45,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2018-01-23 14:25:45,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-23 14:25:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-01-23 14:25:45,052 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2018-01-23 14:25:45,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:25:45,052 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-01-23 14:25:45,052 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-23 14:25:45,053 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-01-23 14:25:45,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-23 14:25:45,054 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:45,054 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:25:45,054 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:25:45,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1424676713, now seen corresponding path program 1 times [2018-01-23 14:25:45,055 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:45,055 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:45,056 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:45,056 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:25:45,056 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:45,075 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-23 14:25:45,156 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:25:45,157 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 14:25:45,167 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:25:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:45,206 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:25:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-23 14:25:45,320 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:25:45,320 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2018-01-23 14:25:45,321 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-23 14:25:45,321 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-23 14:25:45,321 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-01-23 14:25:45,322 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 8 states. [2018-01-23 14:25:45,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:25:45,420 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2018-01-23 14:25:45,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-23 14:25:45,426 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2018-01-23 14:25:45,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:25:45,427 INFO L225 Difference]: With dead ends: 68 [2018-01-23 14:25:45,427 INFO L226 Difference]: Without dead ends: 50 [2018-01-23 14:25:45,428 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-01-23 14:25:45,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-23 14:25:45,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2018-01-23 14:25:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-01-23 14:25:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-01-23 14:25:45,436 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 37 [2018-01-23 14:25:45,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:25:45,436 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-01-23 14:25:45,436 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-23 14:25:45,436 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-01-23 14:25:45,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-01-23 14:25:45,438 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:45,438 INFO L322 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:25:45,438 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:25:45,438 INFO L82 PathProgramCache]: Analyzing trace with hash 256637367, now seen corresponding path program 2 times [2018-01-23 14:25:45,439 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:45,439 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:45,440 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:45,440 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:25:45,440 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:45,459 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-01-23 14:25:45,539 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:25:45,540 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 14:25:45,548 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:25:45,571 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:45,578 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:45,582 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:25:45,587 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:25:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-01-23 14:25:45,675 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:25:45,675 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-01-23 14:25:45,675 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:25:45,675 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:25:45,675 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:25:45,676 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 10 states. [2018-01-23 14:25:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:25:45,795 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2018-01-23 14:25:45,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-23 14:25:45,796 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2018-01-23 14:25:45,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:25:45,797 INFO L225 Difference]: With dead ends: 80 [2018-01-23 14:25:45,797 INFO L226 Difference]: Without dead ends: 58 [2018-01-23 14:25:45,798 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-01-23 14:25:45,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-01-23 14:25:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2018-01-23 14:25:45,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-23 14:25:45,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-01-23 14:25:45,806 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 45 [2018-01-23 14:25:45,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:25:45,807 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-01-23 14:25:45,807 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:25:45,807 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-01-23 14:25:45,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-01-23 14:25:45,808 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:45,809 INFO L322 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:25:45,809 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:25:45,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1564201431, now seen corresponding path program 3 times [2018-01-23 14:25:45,810 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:45,810 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:45,811 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:45,811 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:25:45,811 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:45,830 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-01-23 14:25:45,934 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:25:45,935 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 14:25:45,944 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:25:45,968 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:45,974 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:45,978 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:45,983 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:45,986 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:25:45,991 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:25:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-01-23 14:25:46,158 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:25:46,159 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2018-01-23 14:25:46,159 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-23 14:25:46,159 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-23 14:25:46,159 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2018-01-23 14:25:46,160 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 15 states. [2018-01-23 14:25:46,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:25:46,310 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2018-01-23 14:25:46,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-23 14:25:46,310 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2018-01-23 14:25:46,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:25:46,314 INFO L225 Difference]: With dead ends: 98 [2018-01-23 14:25:46,314 INFO L226 Difference]: Without dead ends: 72 [2018-01-23 14:25:46,315 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2018-01-23 14:25:46,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-01-23 14:25:46,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2018-01-23 14:25:46,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-23 14:25:46,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-01-23 14:25:46,323 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 53 [2018-01-23 14:25:46,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:25:46,324 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-01-23 14:25:46,324 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-23 14:25:46,324 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-01-23 14:25:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-01-23 14:25:46,326 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:46,326 INFO L322 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:25:46,326 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:25:46,326 INFO L82 PathProgramCache]: Analyzing trace with hash -785035568, now seen corresponding path program 4 times [2018-01-23 14:25:46,326 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:46,327 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:46,327 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:46,328 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:25:46,328 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:46,348 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-01-23 14:25:46,472 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:25:46,472 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 14:25:46,481 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:25:46,537 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:25:46,542 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:25:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-01-23 14:25:46,632 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:25:46,633 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2018-01-23 14:25:46,633 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-23 14:25:46,633 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-23 14:25:46,634 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2018-01-23 14:25:46,634 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 16 states. [2018-01-23 14:25:46,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:25:46,760 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2018-01-23 14:25:46,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-23 14:25:46,760 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2018-01-23 14:25:46,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:25:46,761 INFO L225 Difference]: With dead ends: 112 [2018-01-23 14:25:46,762 INFO L226 Difference]: Without dead ends: 82 [2018-01-23 14:25:46,762 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-01-23 14:25:46,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-01-23 14:25:46,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2018-01-23 14:25:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-01-23 14:25:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-01-23 14:25:46,771 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 65 [2018-01-23 14:25:46,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:25:46,771 INFO L432 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-01-23 14:25:46,772 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-23 14:25:46,772 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-01-23 14:25:46,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-01-23 14:25:46,773 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:46,773 INFO L322 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:25:46,773 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:25:46,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1765243849, now seen corresponding path program 5 times [2018-01-23 14:25:46,774 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:46,774 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:46,775 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:46,775 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:25:46,775 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:46,796 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-01-23 14:25:46,950 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:25:46,950 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 14:25:46,958 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:25:46,968 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:46,970 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:46,973 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:46,985 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:46,994 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:47,015 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:47,061 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:47,063 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:25:47,068 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:25:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-01-23 14:25:47,110 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:25:47,111 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2018-01-23 14:25:47,111 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-23 14:25:47,111 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-23 14:25:47,111 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-01-23 14:25:47,112 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 12 states. [2018-01-23 14:25:47,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:25:47,245 INFO L93 Difference]: Finished difference Result 128 states and 131 transitions. [2018-01-23 14:25:47,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-23 14:25:47,245 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2018-01-23 14:25:47,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:25:47,246 INFO L225 Difference]: With dead ends: 128 [2018-01-23 14:25:47,246 INFO L226 Difference]: Without dead ends: 90 [2018-01-23 14:25:47,247 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2018-01-23 14:25:47,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-01-23 14:25:47,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2018-01-23 14:25:47,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-23 14:25:47,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-01-23 14:25:47,253 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 77 [2018-01-23 14:25:47,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:25:47,253 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-01-23 14:25:47,253 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-23 14:25:47,254 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-01-23 14:25:47,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-01-23 14:25:47,254 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:47,254 INFO L322 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:25:47,255 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:25:47,255 INFO L82 PathProgramCache]: Analyzing trace with hash -29132713, now seen corresponding path program 6 times [2018-01-23 14:25:47,255 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:47,255 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:47,255 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:47,256 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:25:47,256 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:47,276 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-01-23 14:25:47,449 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:25:47,449 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 14:25:47,457 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:25:47,481 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:47,564 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:47,567 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:47,572 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:47,598 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:47,618 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:47,644 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:47,709 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:47,710 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:25:47,714 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:25:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-01-23 14:25:47,763 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:25:47,763 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2018-01-23 14:25:47,763 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-23 14:25:47,763 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-23 14:25:47,764 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-01-23 14:25:47,764 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 13 states. [2018-01-23 14:25:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:25:47,951 INFO L93 Difference]: Finished difference Result 140 states and 143 transitions. [2018-01-23 14:25:47,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-23 14:25:47,952 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2018-01-23 14:25:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:25:47,953 INFO L225 Difference]: With dead ends: 140 [2018-01-23 14:25:47,953 INFO L226 Difference]: Without dead ends: 98 [2018-01-23 14:25:47,954 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2018-01-23 14:25:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-01-23 14:25:47,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2018-01-23 14:25:47,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-01-23 14:25:47,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-01-23 14:25:47,964 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 85 [2018-01-23 14:25:47,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:25:47,965 INFO L432 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-01-23 14:25:47,965 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-23 14:25:47,965 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-01-23 14:25:47,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-01-23 14:25:47,966 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:47,966 INFO L322 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:25:47,966 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:25:47,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1240796297, now seen corresponding path program 7 times [2018-01-23 14:25:47,967 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:47,967 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:47,968 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:47,968 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:25:47,968 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:47,988 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-01-23 14:25:48,124 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:25:48,124 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 14:25:48,134 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:25:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:48,170 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:25:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-01-23 14:25:48,311 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:25:48,311 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2018-01-23 14:25:48,311 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-23 14:25:48,312 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-23 14:25:48,312 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2018-01-23 14:25:48,312 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 22 states. [2018-01-23 14:25:48,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:25:48,471 INFO L93 Difference]: Finished difference Result 152 states and 155 transitions. [2018-01-23 14:25:48,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-23 14:25:48,472 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 93 [2018-01-23 14:25:48,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:25:48,472 INFO L225 Difference]: With dead ends: 152 [2018-01-23 14:25:48,473 INFO L226 Difference]: Without dead ends: 106 [2018-01-23 14:25:48,473 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=187, Invalid=319, Unknown=0, NotChecked=0, Total=506 [2018-01-23 14:25:48,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-01-23 14:25:48,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2018-01-23 14:25:48,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-01-23 14:25:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-01-23 14:25:48,481 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 93 [2018-01-23 14:25:48,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:25:48,481 INFO L432 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-01-23 14:25:48,481 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-23 14:25:48,481 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-01-23 14:25:48,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-01-23 14:25:48,482 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:48,482 INFO L322 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:25:48,482 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:25:48,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1325632105, now seen corresponding path program 8 times [2018-01-23 14:25:48,482 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:48,482 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:48,483 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:48,483 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:25:48,483 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:48,502 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-01-23 14:25:48,695 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:25:48,695 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 14:25:48,702 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:25:48,718 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:48,729 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:48,732 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:25:48,735 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:25:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-01-23 14:25:48,852 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:25:48,853 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2018-01-23 14:25:48,853 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-23 14:25:48,853 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-23 14:25:48,854 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2018-01-23 14:25:48,854 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 24 states. [2018-01-23 14:25:48,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:25:48,968 INFO L93 Difference]: Finished difference Result 164 states and 167 transitions. [2018-01-23 14:25:48,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-23 14:25:48,969 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 101 [2018-01-23 14:25:48,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:25:48,969 INFO L225 Difference]: With dead ends: 164 [2018-01-23 14:25:48,969 INFO L226 Difference]: Without dead ends: 114 [2018-01-23 14:25:48,970 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2018-01-23 14:25:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-01-23 14:25:48,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2018-01-23 14:25:48,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-01-23 14:25:48,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2018-01-23 14:25:48,976 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 101 [2018-01-23 14:25:48,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:25:48,976 INFO L432 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2018-01-23 14:25:48,976 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-23 14:25:48,977 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2018-01-23 14:25:48,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-01-23 14:25:48,977 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:48,977 INFO L322 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:25:48,977 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:25:48,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1372225865, now seen corresponding path program 9 times [2018-01-23 14:25:48,978 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:48,978 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:48,978 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:48,978 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:25:48,979 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:48,995 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-01-23 14:25:49,178 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:25:49,178 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 14:25:49,184 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:25:49,199 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:49,202 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:49,204 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:49,207 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:49,210 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:49,219 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:49,225 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:49,256 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:49,309 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:49,329 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:49,393 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:49,394 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:25:49,397 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:25:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-01-23 14:25:49,463 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:25:49,463 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2018-01-23 14:25:49,463 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-23 14:25:49,464 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-23 14:25:49,464 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-01-23 14:25:49,464 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 16 states. [2018-01-23 14:25:49,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:25:49,652 INFO L93 Difference]: Finished difference Result 176 states and 179 transitions. [2018-01-23 14:25:49,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-23 14:25:49,653 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 109 [2018-01-23 14:25:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:25:49,654 INFO L225 Difference]: With dead ends: 176 [2018-01-23 14:25:49,654 INFO L226 Difference]: Without dead ends: 122 [2018-01-23 14:25:49,655 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2018-01-23 14:25:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-01-23 14:25:49,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2018-01-23 14:25:49,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-01-23 14:25:49,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-01-23 14:25:49,662 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 109 [2018-01-23 14:25:49,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:25:49,662 INFO L432 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-01-23 14:25:49,662 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-23 14:25:49,663 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-01-23 14:25:49,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-01-23 14:25:49,663 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:49,664 INFO L322 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:25:49,664 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:25:49,664 INFO L82 PathProgramCache]: Analyzing trace with hash 420712151, now seen corresponding path program 10 times [2018-01-23 14:25:49,664 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:49,664 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:49,665 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:49,665 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:25:49,665 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:49,680 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-01-23 14:25:49,851 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:25:49,851 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 14:25:49,856 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:25:50,044 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:25:50,048 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:25:50,202 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-01-23 14:25:50,223 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:25:50,224 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2018-01-23 14:25:50,224 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-23 14:25:50,224 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-23 14:25:50,224 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=482, Unknown=0, NotChecked=0, Total=756 [2018-01-23 14:25:50,225 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 28 states. [2018-01-23 14:25:50,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:25:50,367 INFO L93 Difference]: Finished difference Result 188 states and 191 transitions. [2018-01-23 14:25:50,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-23 14:25:50,367 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 117 [2018-01-23 14:25:50,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:25:50,368 INFO L225 Difference]: With dead ends: 188 [2018-01-23 14:25:50,368 INFO L226 Difference]: Without dead ends: 130 [2018-01-23 14:25:50,369 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=511, Unknown=0, NotChecked=0, Total=812 [2018-01-23 14:25:50,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-01-23 14:25:50,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2018-01-23 14:25:50,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-01-23 14:25:50,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2018-01-23 14:25:50,376 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 117 [2018-01-23 14:25:50,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:25:50,377 INFO L432 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2018-01-23 14:25:50,377 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-23 14:25:50,377 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2018-01-23 14:25:50,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-01-23 14:25:50,378 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:50,378 INFO L322 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:25:50,378 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:25:50,379 INFO L82 PathProgramCache]: Analyzing trace with hash -382458377, now seen corresponding path program 11 times [2018-01-23 14:25:50,379 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:50,379 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:50,380 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:50,380 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:25:50,380 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:50,400 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-01-23 14:25:50,581 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:25:50,581 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 14:25:50,587 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:25:50,598 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:50,600 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:50,603 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:50,610 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:50,619 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:50,655 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:50,671 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:50,697 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:50,753 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:50,977 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:51,108 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:51,748 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:54,600 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:54,611 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:25:54,618 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:25:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-01-23 14:25:54,675 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:25:54,675 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2018-01-23 14:25:54,675 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-23 14:25:54,676 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-23 14:25:54,676 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-01-23 14:25:54,676 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 18 states. [2018-01-23 14:25:54,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:25:54,908 INFO L93 Difference]: Finished difference Result 200 states and 203 transitions. [2018-01-23 14:25:54,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-23 14:25:54,908 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 125 [2018-01-23 14:25:54,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:25:54,909 INFO L225 Difference]: With dead ends: 200 [2018-01-23 14:25:54,909 INFO L226 Difference]: Without dead ends: 138 [2018-01-23 14:25:54,909 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2018-01-23 14:25:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-01-23 14:25:54,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2018-01-23 14:25:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-01-23 14:25:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2018-01-23 14:25:54,917 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 125 [2018-01-23 14:25:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:25:54,917 INFO L432 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2018-01-23 14:25:54,917 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-23 14:25:54,917 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2018-01-23 14:25:54,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-01-23 14:25:54,918 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:54,919 INFO L322 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:25:54,919 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:25:54,919 INFO L82 PathProgramCache]: Analyzing trace with hash -2106276841, now seen corresponding path program 12 times [2018-01-23 14:25:54,919 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:54,919 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:54,920 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:54,920 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:25:54,920 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:54,940 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2018-01-23 14:25:55,198 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:25:55,198 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 14:25:55,203 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:25:55,219 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:55,222 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:55,230 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:55,234 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:55,243 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:55,261 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:55,296 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:55,323 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:55,398 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:55,578 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:55,754 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:56,189 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:56,368 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:56,455 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:25:56,456 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:25:56,461 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:25:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 50 proven. 338 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-01-23 14:25:56,662 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:25:56,662 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2018-01-23 14:25:56,663 INFO L409 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-01-23 14:25:56,663 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-01-23 14:25:56,664 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=775, Unknown=0, NotChecked=0, Total=1190 [2018-01-23 14:25:56,664 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 35 states. [2018-01-23 14:25:56,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:25:56,837 INFO L93 Difference]: Finished difference Result 218 states and 223 transitions. [2018-01-23 14:25:56,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-23 14:25:56,838 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2018-01-23 14:25:56,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:25:56,839 INFO L225 Difference]: With dead ends: 218 [2018-01-23 14:25:56,839 INFO L226 Difference]: Without dead ends: 152 [2018-01-23 14:25:56,839 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=811, Unknown=0, NotChecked=0, Total=1260 [2018-01-23 14:25:56,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-01-23 14:25:56,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2018-01-23 14:25:56,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-01-23 14:25:56,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2018-01-23 14:25:56,847 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 133 [2018-01-23 14:25:56,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:25:56,848 INFO L432 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2018-01-23 14:25:56,848 INFO L433 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-01-23 14:25:56,848 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2018-01-23 14:25:56,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-01-23 14:25:56,849 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:56,849 INFO L322 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:25:56,849 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:25:56,849 INFO L82 PathProgramCache]: Analyzing trace with hash -482480880, now seen corresponding path program 13 times [2018-01-23 14:25:56,849 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:56,849 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:56,850 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:56,850 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:25:56,850 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:56,870 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-01-23 14:25:57,135 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:25:57,135 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 14:25:57,140 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:25:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:57,172 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:25:57,453 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-01-23 14:25:57,475 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:25:57,503 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2018-01-23 14:25:57,504 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-23 14:25:57,504 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-23 14:25:57,505 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=800, Unknown=0, NotChecked=0, Total=1260 [2018-01-23 14:25:57,505 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand 36 states. [2018-01-23 14:25:57,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:25:57,785 INFO L93 Difference]: Finished difference Result 232 states and 236 transitions. [2018-01-23 14:25:57,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-23 14:25:57,786 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 145 [2018-01-23 14:25:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:25:57,787 INFO L225 Difference]: With dead ends: 232 [2018-01-23 14:25:57,787 INFO L226 Difference]: Without dead ends: 162 [2018-01-23 14:25:57,788 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=495, Invalid=837, Unknown=0, NotChecked=0, Total=1332 [2018-01-23 14:25:57,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-01-23 14:25:57,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 158. [2018-01-23 14:25:57,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-01-23 14:25:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2018-01-23 14:25:57,798 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 145 [2018-01-23 14:25:57,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:25:57,798 INFO L432 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2018-01-23 14:25:57,798 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-23 14:25:57,798 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2018-01-23 14:25:57,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-01-23 14:25:57,799 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:57,799 INFO L322 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:25:57,799 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:25:57,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1554134921, now seen corresponding path program 14 times [2018-01-23 14:25:57,799 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:57,799 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:57,800 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:57,800 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:25:57,800 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:57,820 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2018-01-23 14:25:58,080 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:25:58,080 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 14:25:58,085 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:25:58,101 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:58,113 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:25:58,116 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:25:58,119 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:25:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2018-01-23 14:25:58,346 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:25:58,346 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2018-01-23 14:25:58,346 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-01-23 14:25:58,347 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-01-23 14:25:58,347 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=892, Unknown=0, NotChecked=0, Total=1406 [2018-01-23 14:25:58,347 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand 38 states. [2018-01-23 14:25:58,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:25:58,529 INFO L93 Difference]: Finished difference Result 248 states and 251 transitions. [2018-01-23 14:25:58,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-23 14:25:58,530 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 157 [2018-01-23 14:25:58,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:25:58,531 INFO L225 Difference]: With dead ends: 248 [2018-01-23 14:25:58,531 INFO L226 Difference]: Without dead ends: 170 [2018-01-23 14:25:58,532 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=551, Invalid=931, Unknown=0, NotChecked=0, Total=1482 [2018-01-23 14:25:58,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-01-23 14:25:58,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 166. [2018-01-23 14:25:58,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-01-23 14:25:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2018-01-23 14:25:58,540 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 157 [2018-01-23 14:25:58,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:25:58,541 INFO L432 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2018-01-23 14:25:58,541 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-01-23 14:25:58,541 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2018-01-23 14:25:58,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-01-23 14:25:58,541 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:25:58,542 INFO L322 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:25:58,542 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:25:58,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1556447895, now seen corresponding path program 15 times [2018-01-23 14:25:58,542 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:25:58,542 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:25:58,543 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:58,543 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:25:58,543 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:25:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:25:58,564 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:25:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-01-23 14:25:58,876 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:25:58,876 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 14:25:58,881 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:25:58,903 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:58,909 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:58,912 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:58,918 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:58,925 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:58,942 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:58,951 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:58,963 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:58,987 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:59,001 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:59,026 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:59,120 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:59,249 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:59,684 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:25:59,908 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:26:00,214 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:26:00,339 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:26:00,942 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:26:00,944 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:26:00,951 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:26:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-01-23 14:26:01,199 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:26:01,199 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2018-01-23 14:26:01,199 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-23 14:26:01,199 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-23 14:26:01,200 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=989, Unknown=0, NotChecked=0, Total=1560 [2018-01-23 14:26:01,200 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 40 states. [2018-01-23 14:26:01,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:26:01,374 INFO L93 Difference]: Finished difference Result 260 states and 263 transitions. [2018-01-23 14:26:01,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-23 14:26:01,375 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 165 [2018-01-23 14:26:01,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:26:01,376 INFO L225 Difference]: With dead ends: 260 [2018-01-23 14:26:01,376 INFO L226 Difference]: Without dead ends: 178 [2018-01-23 14:26:01,376 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=610, Invalid=1030, Unknown=0, NotChecked=0, Total=1640 [2018-01-23 14:26:01,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-01-23 14:26:01,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2018-01-23 14:26:01,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-01-23 14:26:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2018-01-23 14:26:01,386 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 165 [2018-01-23 14:26:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:26:01,387 INFO L432 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2018-01-23 14:26:01,387 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-23 14:26:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2018-01-23 14:26:01,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-01-23 14:26:01,388 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:26:01,388 INFO L322 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:26:01,388 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:26:01,389 INFO L82 PathProgramCache]: Analyzing trace with hash -899628105, now seen corresponding path program 16 times [2018-01-23 14:26:01,389 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:26:01,389 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:26:01,390 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:26:01,390 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:26:01,390 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:26:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:26:01,412 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:26:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-01-23 14:26:01,774 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:26:01,774 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 14:26:01,779 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:26:02,885 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:26:02,889 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:26:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-01-23 14:26:03,130 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:26:03,130 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2018-01-23 14:26:03,131 INFO L409 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-01-23 14:26:03,131 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-01-23 14:26:03,131 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1091, Unknown=0, NotChecked=0, Total=1722 [2018-01-23 14:26:03,132 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 42 states. [2018-01-23 14:26:03,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:26:03,331 INFO L93 Difference]: Finished difference Result 272 states and 275 transitions. [2018-01-23 14:26:03,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-23 14:26:03,331 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 173 [2018-01-23 14:26:03,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:26:03,332 INFO L225 Difference]: With dead ends: 272 [2018-01-23 14:26:03,332 INFO L226 Difference]: Without dead ends: 186 [2018-01-23 14:26:03,333 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=672, Invalid=1134, Unknown=0, NotChecked=0, Total=1806 [2018-01-23 14:26:03,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-01-23 14:26:03,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 182. [2018-01-23 14:26:03,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-01-23 14:26:03,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2018-01-23 14:26:03,343 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 173 [2018-01-23 14:26:03,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:26:03,343 INFO L432 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2018-01-23 14:26:03,343 INFO L433 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-01-23 14:26:03,344 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2018-01-23 14:26:03,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-01-23 14:26:03,345 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:26:03,345 INFO L322 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:26:03,345 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:26:03,345 INFO L82 PathProgramCache]: Analyzing trace with hash 965544919, now seen corresponding path program 17 times [2018-01-23 14:26:03,346 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:26:03,346 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:26:03,346 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:26:03,347 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:26:03,347 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:26:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:26:03,369 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:26:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2018-01-23 14:26:03,700 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:26:03,700 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 14:26:03,706 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:26:03,722 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:03,728 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:03,732 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:03,740 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:03,755 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:03,796 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:03,818 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:03,933 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:04,169 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:04,327 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:04,713 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:05,120 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:06,861 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:08,977 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:10,496 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:19,603 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:22,835 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:23,132 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:28,565 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:36,469 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:26:36,485 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:26:36,509 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:26:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2018-01-23 14:26:36,565 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:26:36,565 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 25 [2018-01-23 14:26:36,566 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-01-23 14:26:36,566 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-01-23 14:26:36,566 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-01-23 14:26:36,566 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 25 states. [2018-01-23 14:26:36,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:26:36,865 INFO L93 Difference]: Finished difference Result 284 states and 287 transitions. [2018-01-23 14:26:36,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-23 14:26:36,866 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 181 [2018-01-23 14:26:36,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:26:36,867 INFO L225 Difference]: With dead ends: 284 [2018-01-23 14:26:36,867 INFO L226 Difference]: Without dead ends: 194 [2018-01-23 14:26:36,868 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2018-01-23 14:26:36,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-01-23 14:26:36,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 190. [2018-01-23 14:26:36,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-01-23 14:26:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2018-01-23 14:26:36,878 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 181 [2018-01-23 14:26:36,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:26:36,878 INFO L432 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2018-01-23 14:26:36,878 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-01-23 14:26:36,878 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2018-01-23 14:26:36,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-01-23 14:26:36,879 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:26:36,879 INFO L322 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:26:36,879 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:26:36,879 INFO L82 PathProgramCache]: Analyzing trace with hash -2081957129, now seen corresponding path program 18 times [2018-01-23 14:26:36,879 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:26:36,879 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:26:36,880 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:26:36,880 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:26:36,880 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:26:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:26:36,900 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:26:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2018-01-23 14:26:37,388 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:26:37,389 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 14:26:37,395 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:26:37,419 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:26:37,423 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:26:37,427 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:26:37,433 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:26:37,439 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:26:37,462 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:26:37,486 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:26:37,570 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:26:37,630 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:26:37,802 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:26:38,208 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:26:38,695 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:26:39,045 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:26:39,489 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:26:40,871 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:26:43,540 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:26:44,869 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command Received shutdown request... [2018-01-23 14:26:51,262 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:26:54,645 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command Cannot interrupt operation gracefully because timeout expired. Forcing shutdown