java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/memset3_true-valid-memsafety_true-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 14:44:04,508 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 14:44:04,510 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 14:44:04,523 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 14:44:04,524 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 14:44:04,525 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 14:44:04,526 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 14:44:04,528 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 14:44:04,530 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 14:44:04,531 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 14:44:04,531 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 14:44:04,531 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 14:44:04,532 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 14:44:04,534 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 14:44:04,535 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 14:44:04,537 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 14:44:04,540 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 14:44:04,542 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 14:44:04,543 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 14:44:04,544 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 14:44:04,547 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-23 14:44:04,547 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-23 14:44:04,547 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-23 14:44:04,548 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-23 14:44:04,549 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-23 14:44:04,550 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-23 14:44:04,551 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-23 14:44:04,551 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-23 14:44:04,552 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-23 14:44:04,552 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 14:44:04,552 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 14:44:04,553 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-23 14:44:04,563 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 14:44:04,563 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 14:44:04,564 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 14:44:04,564 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 14:44:04,564 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 14:44:04,565 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 14:44:04,565 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 14:44:04,565 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 14:44:04,566 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 14:44:04,566 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 14:44:04,566 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 14:44:04,566 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 14:44:04,566 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 14:44:04,567 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 14:44:04,567 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 14:44:04,567 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 14:44:04,567 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 14:44:04,567 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 14:44:04,567 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 14:44:04,568 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 14:44:04,568 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 14:44:04,568 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 14:44:04,568 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 14:44:04,568 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 14:44:04,569 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 14:44:04,569 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:44:04,569 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 14:44:04,569 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 14:44:04,569 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 14:44:04,570 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 14:44:04,570 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 14:44:04,570 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 14:44:04,570 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 14:44:04,570 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 14:44:04,570 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 14:44:04,571 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 14:44:04,571 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 14:44:04,607 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 14:44:04,621 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 14:44:04,627 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 14:44:04,628 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 14:44:04,629 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 14:44:04,630 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/memset3_true-valid-memsafety_true-termination.c [2018-01-23 14:44:04,774 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 14:44:04,779 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 14:44:04,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 14:44:04,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 14:44:04,787 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 14:44:04,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:44:04" (1/1) ... [2018-01-23 14:44:04,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c111afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:04, skipping insertion in model container [2018-01-23 14:44:04,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:44:04" (1/1) ... [2018-01-23 14:44:04,809 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:44:04,829 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:44:04,950 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:44:04,963 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:44:04,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:04 WrapperNode [2018-01-23 14:44:04,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 14:44:04,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 14:44:04,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 14:44:04,970 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 14:44:04,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:04" (1/1) ... [2018-01-23 14:44:04,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:04" (1/1) ... [2018-01-23 14:44:04,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:04" (1/1) ... [2018-01-23 14:44:04,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:04" (1/1) ... [2018-01-23 14:44:05,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:04" (1/1) ... [2018-01-23 14:44:05,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:04" (1/1) ... [2018-01-23 14:44:05,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:04" (1/1) ... [2018-01-23 14:44:05,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 14:44:05,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 14:44:05,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 14:44:05,007 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 14:44:05,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:04" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:44:05,054 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 14:44:05,054 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 14:44:05,054 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 14:44:05,054 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 14:44:05,054 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 14:44:05,055 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 14:44:05,055 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-01-23 14:44:05,055 INFO L136 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-01-23 14:44:05,055 INFO L128 BoogieDeclarations]: Found specification of procedure memset [2018-01-23 14:44:05,055 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 14:44:05,055 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 14:44:05,055 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 14:44:05,171 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 14:44:05,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:44:05 BoogieIcfgContainer [2018-01-23 14:44:05,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 14:44:05,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-23 14:44:05,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-23 14:44:05,174 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-23 14:44:05,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 02:44:04" (1/3) ... [2018-01-23 14:44:05,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140fe26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:44:05, skipping insertion in model container [2018-01-23 14:44:05,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:44:04" (2/3) ... [2018-01-23 14:44:05,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140fe26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:44:05, skipping insertion in model container [2018-01-23 14:44:05,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:44:05" (3/3) ... [2018-01-23 14:44:05,179 INFO L105 eAbstractionObserver]: Analyzing ICFG memset3_true-valid-memsafety_true-termination.c [2018-01-23 14:44:05,186 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-23 14:44:05,191 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-23 14:44:05,224 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:44:05,224 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:44:05,224 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:44:05,224 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:44:05,224 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:44:05,224 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:44:05,224 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:44:05,224 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-23 14:44:05,225 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:44:05,240 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-01-23 14:44:05,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-23 14:44:05,245 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:05,246 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-23 14:44:05,246 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-23 14:44:05,252 INFO L82 PathProgramCache]: Analyzing trace with hash 51896, now seen corresponding path program 1 times [2018-01-23 14:44:05,254 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:05,255 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:05,303 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:05,303 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:05,303 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:44:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:44:05,367 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:44:05,375 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:44:05,382 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:44:05,382 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:44:05,382 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:44:05,382 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:44:05,382 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:44:05,383 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:44:05,383 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:44:05,383 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-23 14:44:05,383 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:44:05,384 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-01-23 14:44:05,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-23 14:44:05,386 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:05,386 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:05,386 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:05,386 INFO L82 PathProgramCache]: Analyzing trace with hash 126067280, now seen corresponding path program 1 times [2018-01-23 14:44:05,386 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:05,387 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:05,388 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:05,388 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:05,388 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:05,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:05,428 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:05,530 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:44:05,530 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-23 14:44:05,531 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-23 14:44:05,542 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-23 14:44:05,542 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-23 14:44:05,544 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2018-01-23 14:44:05,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:05,600 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-01-23 14:44:05,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-23 14:44:05,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-01-23 14:44:05,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:05,680 INFO L225 Difference]: With dead ends: 34 [2018-01-23 14:44:05,680 INFO L226 Difference]: Without dead ends: 20 [2018-01-23 14:44:05,683 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:44:05,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-01-23 14:44:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-01-23 14:44:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-01-23 14:44:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-01-23 14:44:05,712 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-01-23 14:44:05,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:05,712 INFO L432 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-01-23 14:44:05,712 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-23 14:44:05,713 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-01-23 14:44:05,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-23 14:44:05,713 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:05,713 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:05,713 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:05,714 INFO L82 PathProgramCache]: Analyzing trace with hash 763300235, now seen corresponding path program 1 times [2018-01-23 14:44:05,714 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:05,714 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:05,715 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:05,715 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:05,715 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:05,731 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:05,804 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:05,805 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:05,813 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:05,838 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:05,920 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:05,920 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-01-23 14:44:05,921 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-23 14:44:05,922 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-23 14:44:05,922 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-23 14:44:05,922 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2018-01-23 14:44:05,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:05,956 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-01-23 14:44:05,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:44:05,957 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-01-23 14:44:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:05,958 INFO L225 Difference]: With dead ends: 30 [2018-01-23 14:44:05,958 INFO L226 Difference]: Without dead ends: 21 [2018-01-23 14:44:05,960 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-01-23 14:44:05,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-01-23 14:44:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-01-23 14:44:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-01-23 14:44:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-01-23 14:44:05,964 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-01-23 14:44:05,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:05,965 INFO L432 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-01-23 14:44:05,965 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-23 14:44:05,965 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-01-23 14:44:05,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-23 14:44:05,966 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:05,966 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:05,966 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:05,966 INFO L82 PathProgramCache]: Analyzing trace with hash -957314640, now seen corresponding path program 2 times [2018-01-23 14:44:05,967 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:05,967 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:05,968 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:05,968 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:05,968 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:05,984 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:06,071 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:06,071 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:06,086 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:06,101 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:06,104 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:06,105 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:06,107 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:06,193 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:06,193 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-01-23 14:44:06,194 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:44:06,194 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:44:06,194 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:44:06,194 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 10 states. [2018-01-23 14:44:06,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:06,273 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-01-23 14:44:06,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-23 14:44:06,274 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-01-23 14:44:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:06,275 INFO L225 Difference]: With dead ends: 31 [2018-01-23 14:44:06,275 INFO L226 Difference]: Without dead ends: 22 [2018-01-23 14:44:06,276 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-01-23 14:44:06,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-01-23 14:44:06,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-01-23 14:44:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-01-23 14:44:06,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-01-23 14:44:06,281 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-01-23 14:44:06,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:06,281 INFO L432 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-01-23 14:44:06,281 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:44:06,281 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-01-23 14:44:06,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-23 14:44:06,282 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:06,282 INFO L322 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:06,282 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:06,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1538199083, now seen corresponding path program 3 times [2018-01-23 14:44:06,283 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:06,283 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:06,284 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:06,284 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:06,284 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:06,299 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:06,390 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:06,390 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 14:44:06,396 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:44:06,406 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:06,409 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:06,409 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:06,410 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:06,412 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:06,483 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:06,483 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-01-23 14:44:06,484 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-23 14:44:06,484 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-23 14:44:06,484 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2018-01-23 14:44:06,484 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 12 states. [2018-01-23 14:44:06,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:06,519 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-01-23 14:44:06,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-23 14:44:06,519 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-01-23 14:44:06,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:06,520 INFO L225 Difference]: With dead ends: 32 [2018-01-23 14:44:06,520 INFO L226 Difference]: Without dead ends: 23 [2018-01-23 14:44:06,520 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-01-23 14:44:06,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-01-23 14:44:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-01-23 14:44:06,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-01-23 14:44:06,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-01-23 14:44:06,524 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-01-23 14:44:06,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:06,524 INFO L432 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-01-23 14:44:06,525 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-23 14:44:06,525 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-01-23 14:44:06,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-23 14:44:06,525 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:06,525 INFO L322 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:06,525 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:06,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1589713168, now seen corresponding path program 4 times [2018-01-23 14:44:06,526 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:06,526 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:06,527 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:06,527 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:06,527 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:06,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:06,543 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:06,642 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:06,642 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 14:44:06,656 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:44:06,675 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:06,678 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:06,760 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:06,760 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-01-23 14:44:06,761 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-23 14:44:06,761 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-23 14:44:06,761 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:44:06,762 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 14 states. [2018-01-23 14:44:06,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:06,800 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-01-23 14:44:06,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-23 14:44:06,802 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2018-01-23 14:44:06,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:06,803 INFO L225 Difference]: With dead ends: 33 [2018-01-23 14:44:06,803 INFO L226 Difference]: Without dead ends: 24 [2018-01-23 14:44:06,804 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-01-23 14:44:06,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-01-23 14:44:06,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-01-23 14:44:06,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-01-23 14:44:06,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-01-23 14:44:06,808 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-01-23 14:44:06,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:06,809 INFO L432 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-01-23 14:44:06,809 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-23 14:44:06,809 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-01-23 14:44:06,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-23 14:44:06,810 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:06,810 INFO L322 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:06,810 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:06,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1108317493, now seen corresponding path program 5 times [2018-01-23 14:44:06,810 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:06,811 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:06,811 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:06,812 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:06,812 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:06,826 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:06,906 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:06,906 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 14:44:06,918 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:44:06,923 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:06,925 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:06,926 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:06,931 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:06,932 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:06,934 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:07,022 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:07,022 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-01-23 14:44:07,023 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-23 14:44:07,023 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-23 14:44:07,023 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-01-23 14:44:07,023 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2018-01-23 14:44:07,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:07,082 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-01-23 14:44:07,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-23 14:44:07,082 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2018-01-23 14:44:07,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:07,083 INFO L225 Difference]: With dead ends: 34 [2018-01-23 14:44:07,083 INFO L226 Difference]: Without dead ends: 25 [2018-01-23 14:44:07,083 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2018-01-23 14:44:07,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-01-23 14:44:07,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-01-23 14:44:07,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-01-23 14:44:07,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-01-23 14:44:07,086 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-01-23 14:44:07,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:07,087 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-01-23 14:44:07,087 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-23 14:44:07,087 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-01-23 14:44:07,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-23 14:44:07,087 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:07,087 INFO L322 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:07,088 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:07,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1152077936, now seen corresponding path program 6 times [2018-01-23 14:44:07,088 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:07,088 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:07,089 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:07,089 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:07,089 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:07,100 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:07,203 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:07,203 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 14:44:07,208 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:44:07,216 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:07,218 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:07,219 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:07,220 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:07,221 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:07,222 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:07,292 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:07,292 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-01-23 14:44:07,293 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-23 14:44:07,293 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-23 14:44:07,293 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2018-01-23 14:44:07,293 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 18 states. [2018-01-23 14:44:07,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:07,340 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-01-23 14:44:07,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-23 14:44:07,341 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2018-01-23 14:44:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:07,342 INFO L225 Difference]: With dead ends: 35 [2018-01-23 14:44:07,342 INFO L226 Difference]: Without dead ends: 26 [2018-01-23 14:44:07,342 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2018-01-23 14:44:07,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-01-23 14:44:07,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-01-23 14:44:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-01-23 14:44:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-01-23 14:44:07,347 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-01-23 14:44:07,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:07,347 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-01-23 14:44:07,347 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-23 14:44:07,347 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-01-23 14:44:07,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-23 14:44:07,348 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:07,348 INFO L322 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:07,348 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:07,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1790107797, now seen corresponding path program 7 times [2018-01-23 14:44:07,349 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:07,349 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:07,350 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:07,350 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:07,350 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:07,362 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:07,488 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:07,488 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 14:44:07,500 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:07,517 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:07,595 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:07,596 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-01-23 14:44:07,596 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-23 14:44:07,596 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-23 14:44:07,596 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=229, Unknown=0, NotChecked=0, Total=380 [2018-01-23 14:44:07,597 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 20 states. [2018-01-23 14:44:07,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:07,668 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-01-23 14:44:07,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-23 14:44:07,670 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2018-01-23 14:44:07,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:07,671 INFO L225 Difference]: With dead ends: 36 [2018-01-23 14:44:07,671 INFO L226 Difference]: Without dead ends: 27 [2018-01-23 14:44:07,672 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2018-01-23 14:44:07,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-01-23 14:44:07,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-01-23 14:44:07,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-01-23 14:44:07,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-01-23 14:44:07,676 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-01-23 14:44:07,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:07,677 INFO L432 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-01-23 14:44:07,677 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-23 14:44:07,677 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-01-23 14:44:07,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-23 14:44:07,678 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:07,678 INFO L322 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:07,678 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:07,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1491414992, now seen corresponding path program 8 times [2018-01-23 14:44:07,678 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:07,679 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:07,680 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:07,680 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:07,680 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:07,693 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:07,813 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:07,813 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 14:44:07,821 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:07,829 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:07,833 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:07,837 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:07,839 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:07,995 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:07,995 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-01-23 14:44:07,996 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-23 14:44:07,996 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-23 14:44:07,996 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-01-23 14:44:07,996 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 22 states. [2018-01-23 14:44:08,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:08,043 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-01-23 14:44:08,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-23 14:44:08,044 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2018-01-23 14:44:08,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:08,045 INFO L225 Difference]: With dead ends: 37 [2018-01-23 14:44:08,045 INFO L226 Difference]: Without dead ends: 28 [2018-01-23 14:44:08,046 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2018-01-23 14:44:08,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-01-23 14:44:08,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-01-23 14:44:08,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-01-23 14:44:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-01-23 14:44:08,049 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-01-23 14:44:08,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:08,050 INFO L432 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-01-23 14:44:08,050 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-23 14:44:08,050 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-01-23 14:44:08,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-23 14:44:08,050 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:08,051 INFO L322 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:08,051 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:08,051 INFO L82 PathProgramCache]: Analyzing trace with hash 139406347, now seen corresponding path program 9 times [2018-01-23 14:44:08,051 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:08,051 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:08,052 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:08,052 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:08,052 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:08,063 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:08,299 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:08,299 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 14:44:08,311 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:44:08,322 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:08,329 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:08,331 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:08,332 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:08,334 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:08,336 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:08,336 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:08,338 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:08,465 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:08,465 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2018-01-23 14:44:08,466 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-23 14:44:08,466 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-23 14:44:08,466 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2018-01-23 14:44:08,466 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 24 states. [2018-01-23 14:44:08,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:08,498 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-01-23 14:44:08,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-23 14:44:08,498 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2018-01-23 14:44:08,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:08,499 INFO L225 Difference]: With dead ends: 38 [2018-01-23 14:44:08,499 INFO L226 Difference]: Without dead ends: 29 [2018-01-23 14:44:08,500 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=368, Unknown=0, NotChecked=0, Total=600 [2018-01-23 14:44:08,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-01-23 14:44:08,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-01-23 14:44:08,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-01-23 14:44:08,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-01-23 14:44:08,504 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-01-23 14:44:08,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:08,504 INFO L432 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-01-23 14:44:08,504 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-23 14:44:08,504 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-01-23 14:44:08,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-23 14:44:08,505 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:08,505 INFO L322 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:08,505 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:08,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1176811312, now seen corresponding path program 10 times [2018-01-23 14:44:08,506 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:08,506 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:08,506 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:08,507 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:08,507 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:08,518 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:08,634 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:08,634 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 14:44:08,639 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:44:08,650 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:08,652 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:08,754 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:08,754 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2018-01-23 14:44:08,754 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-23 14:44:08,754 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-23 14:44:08,755 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=394, Unknown=0, NotChecked=0, Total=650 [2018-01-23 14:44:08,755 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 26 states. [2018-01-23 14:44:08,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:08,789 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-01-23 14:44:08,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-23 14:44:08,790 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2018-01-23 14:44:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:08,790 INFO L225 Difference]: With dead ends: 39 [2018-01-23 14:44:08,791 INFO L226 Difference]: Without dead ends: 30 [2018-01-23 14:44:08,791 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=271, Invalid=431, Unknown=0, NotChecked=0, Total=702 [2018-01-23 14:44:08,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-01-23 14:44:08,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-01-23 14:44:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-01-23 14:44:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-01-23 14:44:08,794 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-01-23 14:44:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:08,794 INFO L432 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-01-23 14:44:08,794 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-23 14:44:08,794 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-01-23 14:44:08,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-23 14:44:08,795 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:08,795 INFO L322 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:08,795 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:08,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1023373141, now seen corresponding path program 11 times [2018-01-23 14:44:08,795 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:08,795 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:08,796 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:08,796 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:08,796 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:08,806 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:08,939 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:08,939 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 14:44:08,944 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:44:08,947 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:08,948 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:08,949 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:08,950 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:08,951 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:08,952 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:08,956 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:08,958 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:08,960 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:09,086 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:09,086 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2018-01-23 14:44:09,086 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-23 14:44:09,086 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-23 14:44:09,086 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=459, Unknown=0, NotChecked=0, Total=756 [2018-01-23 14:44:09,087 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 28 states. [2018-01-23 14:44:09,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:09,125 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-01-23 14:44:09,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-23 14:44:09,126 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 29 [2018-01-23 14:44:09,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:09,127 INFO L225 Difference]: With dead ends: 40 [2018-01-23 14:44:09,127 INFO L226 Difference]: Without dead ends: 31 [2018-01-23 14:44:09,127 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2018-01-23 14:44:09,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-01-23 14:44:09,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-01-23 14:44:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-01-23 14:44:09,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-01-23 14:44:09,131 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-01-23 14:44:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:09,132 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-01-23 14:44:09,132 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-23 14:44:09,132 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-01-23 14:44:09,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-23 14:44:09,132 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:09,133 INFO L322 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:09,133 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:09,133 INFO L82 PathProgramCache]: Analyzing trace with hash -509614448, now seen corresponding path program 12 times [2018-01-23 14:44:09,133 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:09,133 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:09,134 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:09,134 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:09,134 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:09,143 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:09,382 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:09,382 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 14:44:09,388 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:44:09,396 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:09,400 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:09,402 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:09,403 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:09,408 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:09,409 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:09,414 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:09,414 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:09,417 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:09,585 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:09,586 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2018-01-23 14:44:09,586 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-23 14:44:09,586 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-23 14:44:09,587 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=529, Unknown=0, NotChecked=0, Total=870 [2018-01-23 14:44:09,587 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-01-23 14:44:09,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:09,635 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-01-23 14:44:09,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-23 14:44:09,635 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-01-23 14:44:09,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:09,636 INFO L225 Difference]: With dead ends: 41 [2018-01-23 14:44:09,636 INFO L226 Difference]: Without dead ends: 32 [2018-01-23 14:44:09,637 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=358, Invalid=572, Unknown=0, NotChecked=0, Total=930 [2018-01-23 14:44:09,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-01-23 14:44:09,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-01-23 14:44:09,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-01-23 14:44:09,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-01-23 14:44:09,641 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-01-23 14:44:09,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:09,641 INFO L432 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-01-23 14:44:09,641 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-23 14:44:09,641 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-01-23 14:44:09,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-23 14:44:09,642 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:09,642 INFO L322 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:09,642 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:09,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1762964149, now seen corresponding path program 13 times [2018-01-23 14:44:09,643 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:09,643 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:09,644 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:09,644 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:09,644 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:09,653 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:09,844 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:09,844 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 14:44:09,849 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:09,863 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:09,986 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:09,986 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2018-01-23 14:44:09,986 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-23 14:44:09,987 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-23 14:44:09,987 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=604, Unknown=0, NotChecked=0, Total=992 [2018-01-23 14:44:09,987 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-01-23 14:44:10,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:10,050 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-01-23 14:44:10,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-23 14:44:10,053 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-01-23 14:44:10,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:10,054 INFO L225 Difference]: With dead ends: 42 [2018-01-23 14:44:10,054 INFO L226 Difference]: Without dead ends: 33 [2018-01-23 14:44:10,055 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=650, Unknown=0, NotChecked=0, Total=1056 [2018-01-23 14:44:10,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-01-23 14:44:10,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-01-23 14:44:10,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-01-23 14:44:10,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-01-23 14:44:10,059 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-01-23 14:44:10,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:10,059 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-01-23 14:44:10,059 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-23 14:44:10,059 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-01-23 14:44:10,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-23 14:44:10,060 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:10,060 INFO L322 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:10,060 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:10,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1962099216, now seen corresponding path program 14 times [2018-01-23 14:44:10,060 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:10,060 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:10,061 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:10,061 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:10,061 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:10,070 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:10,342 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:10,342 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 14:44:10,350 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:10,358 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:10,363 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:10,365 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:10,367 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:10,546 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:10,546 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2018-01-23 14:44:10,547 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-23 14:44:10,547 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-23 14:44:10,547 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=684, Unknown=0, NotChecked=0, Total=1122 [2018-01-23 14:44:10,548 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 34 states. [2018-01-23 14:44:10,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:10,673 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-01-23 14:44:10,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-23 14:44:10,674 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 32 [2018-01-23 14:44:10,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:10,674 INFO L225 Difference]: With dead ends: 43 [2018-01-23 14:44:10,674 INFO L226 Difference]: Without dead ends: 34 [2018-01-23 14:44:10,675 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=457, Invalid=733, Unknown=0, NotChecked=0, Total=1190 [2018-01-23 14:44:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-01-23 14:44:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-01-23 14:44:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-01-23 14:44:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-01-23 14:44:10,679 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-01-23 14:44:10,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:10,679 INFO L432 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-01-23 14:44:10,680 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-23 14:44:10,680 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-01-23 14:44:10,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-23 14:44:10,680 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:10,680 INFO L322 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:10,681 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:10,681 INFO L82 PathProgramCache]: Analyzing trace with hash 454648299, now seen corresponding path program 15 times [2018-01-23 14:44:10,681 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:10,681 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:10,682 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:10,682 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:10,682 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:10,690 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:10,849 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:10,849 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 14:44:10,855 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:44:10,864 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:10,866 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:10,867 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:10,869 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:10,870 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:10,871 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:10,873 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:10,874 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:10,875 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:10,876 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:10,877 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:11,026 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:11,026 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2018-01-23 14:44:11,026 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-23 14:44:11,027 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-23 14:44:11,027 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=769, Unknown=0, NotChecked=0, Total=1260 [2018-01-23 14:44:11,027 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 36 states. [2018-01-23 14:44:11,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:11,172 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-01-23 14:44:11,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-23 14:44:11,173 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 33 [2018-01-23 14:44:11,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:11,173 INFO L225 Difference]: With dead ends: 44 [2018-01-23 14:44:11,173 INFO L226 Difference]: Without dead ends: 35 [2018-01-23 14:44:11,174 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=511, Invalid=821, Unknown=0, NotChecked=0, Total=1332 [2018-01-23 14:44:11,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-01-23 14:44:11,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-01-23 14:44:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-23 14:44:11,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-01-23 14:44:11,178 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-01-23 14:44:11,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:11,178 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-01-23 14:44:11,178 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-23 14:44:11,178 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-01-23 14:44:11,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-23 14:44:11,179 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:11,179 INFO L322 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:11,179 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:11,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1935590064, now seen corresponding path program 16 times [2018-01-23 14:44:11,179 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:11,179 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:11,180 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:11,180 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:11,180 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:11,189 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:11,392 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:11,392 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 14:44:11,400 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:44:11,412 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:11,414 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:11,620 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:11,620 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2018-01-23 14:44:11,620 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-01-23 14:44:11,620 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-01-23 14:44:11,621 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=859, Unknown=0, NotChecked=0, Total=1406 [2018-01-23 14:44:11,621 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 38 states. [2018-01-23 14:44:11,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:11,675 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-01-23 14:44:11,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-23 14:44:11,675 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 34 [2018-01-23 14:44:11,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:11,676 INFO L225 Difference]: With dead ends: 45 [2018-01-23 14:44:11,676 INFO L226 Difference]: Without dead ends: 36 [2018-01-23 14:44:11,677 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=568, Invalid=914, Unknown=0, NotChecked=0, Total=1482 [2018-01-23 14:44:11,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-23 14:44:11,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-23 14:44:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-23 14:44:11,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-01-23 14:44:11,680 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-01-23 14:44:11,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:11,680 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-01-23 14:44:11,680 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-01-23 14:44:11,680 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-01-23 14:44:11,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-23 14:44:11,681 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:11,681 INFO L322 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:11,681 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:11,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1276432011, now seen corresponding path program 17 times [2018-01-23 14:44:11,682 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:11,682 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:11,683 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:11,683 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:11,683 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:11,691 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:12,013 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:12,013 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 14:44:12,018 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:44:12,022 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,023 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,024 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,025 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,026 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,026 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,027 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,028 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,029 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,033 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:12,034 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:12,036 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:12,264 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:12,264 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2018-01-23 14:44:12,264 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-23 14:44:12,265 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-23 14:44:12,265 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=954, Unknown=0, NotChecked=0, Total=1560 [2018-01-23 14:44:12,265 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 40 states. [2018-01-23 14:44:12,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:12,323 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-01-23 14:44:12,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-23 14:44:12,324 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 35 [2018-01-23 14:44:12,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:12,325 INFO L225 Difference]: With dead ends: 46 [2018-01-23 14:44:12,325 INFO L226 Difference]: Without dead ends: 37 [2018-01-23 14:44:12,325 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=628, Invalid=1012, Unknown=0, NotChecked=0, Total=1640 [2018-01-23 14:44:12,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-23 14:44:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-23 14:44:12,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-23 14:44:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-01-23 14:44:12,330 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-01-23 14:44:12,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:12,330 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-01-23 14:44:12,330 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-23 14:44:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-01-23 14:44:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-23 14:44:12,331 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:12,331 INFO L322 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:12,331 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:12,332 INFO L82 PathProgramCache]: Analyzing trace with hash 2064868528, now seen corresponding path program 18 times [2018-01-23 14:44:12,332 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:12,332 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:12,333 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:12,333 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:12,333 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:12,341 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:12,636 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:12,636 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 14:44:12,644 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:44:12,653 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:12,655 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:12,656 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:12,657 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:12,661 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:12,662 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:12,663 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:12,664 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:12,669 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:12,670 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:12,671 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:12,672 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:12,918 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:12,918 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2018-01-23 14:44:12,919 INFO L409 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-01-23 14:44:12,919 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-01-23 14:44:12,919 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=1054, Unknown=0, NotChecked=0, Total=1722 [2018-01-23 14:44:12,920 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 42 states. [2018-01-23 14:44:12,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:12,977 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-01-23 14:44:12,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-23 14:44:12,978 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 36 [2018-01-23 14:44:12,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:12,978 INFO L225 Difference]: With dead ends: 47 [2018-01-23 14:44:12,978 INFO L226 Difference]: Without dead ends: 38 [2018-01-23 14:44:12,979 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=691, Invalid=1115, Unknown=0, NotChecked=0, Total=1806 [2018-01-23 14:44:12,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-01-23 14:44:12,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-01-23 14:44:12,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-23 14:44:12,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-01-23 14:44:12,982 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-01-23 14:44:12,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:12,982 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-01-23 14:44:12,982 INFO L433 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-01-23 14:44:12,983 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-01-23 14:44:12,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-23 14:44:12,983 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:12,983 INFO L322 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:12,983 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:12,984 INFO L82 PathProgramCache]: Analyzing trace with hash 736596779, now seen corresponding path program 19 times [2018-01-23 14:44:12,984 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:12,984 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:12,985 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:12,985 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:12,985 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:12,991 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:13,296 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:13,334 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:13,339 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:13,356 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:13,664 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:13,664 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2018-01-23 14:44:13,664 INFO L409 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-01-23 14:44:13,664 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-01-23 14:44:13,665 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=1159, Unknown=0, NotChecked=0, Total=1892 [2018-01-23 14:44:13,665 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 44 states. [2018-01-23 14:44:13,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:13,737 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-01-23 14:44:13,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-23 14:44:13,738 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 37 [2018-01-23 14:44:13,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:13,738 INFO L225 Difference]: With dead ends: 48 [2018-01-23 14:44:13,738 INFO L226 Difference]: Without dead ends: 39 [2018-01-23 14:44:13,739 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=757, Invalid=1223, Unknown=0, NotChecked=0, Total=1980 [2018-01-23 14:44:13,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-23 14:44:13,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-23 14:44:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-23 14:44:13,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-01-23 14:44:13,741 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-01-23 14:44:13,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:13,741 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-01-23 14:44:13,742 INFO L433 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-01-23 14:44:13,742 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-01-23 14:44:13,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-23 14:44:13,742 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:13,742 INFO L322 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:13,742 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:13,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1785121776, now seen corresponding path program 20 times [2018-01-23 14:44:13,743 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:13,743 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:13,744 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:13,744 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:13,744 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:13,752 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:14,130 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:14,130 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:14,135 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:14,141 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:14,146 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:14,147 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:14,149 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:14,451 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:14,451 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2018-01-23 14:44:14,452 INFO L409 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-01-23 14:44:14,452 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-01-23 14:44:14,453 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=801, Invalid=1269, Unknown=0, NotChecked=0, Total=2070 [2018-01-23 14:44:14,453 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 46 states. [2018-01-23 14:44:14,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:14,563 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-01-23 14:44:14,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-23 14:44:14,564 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 38 [2018-01-23 14:44:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:14,564 INFO L225 Difference]: With dead ends: 49 [2018-01-23 14:44:14,564 INFO L226 Difference]: Without dead ends: 40 [2018-01-23 14:44:14,565 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=826, Invalid=1336, Unknown=0, NotChecked=0, Total=2162 [2018-01-23 14:44:14,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-23 14:44:14,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-01-23 14:44:14,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-23 14:44:14,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-01-23 14:44:14,568 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-01-23 14:44:14,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:14,569 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-01-23 14:44:14,569 INFO L433 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-01-23 14:44:14,569 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-01-23 14:44:14,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-23 14:44:14,569 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:14,569 INFO L322 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:14,569 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:14,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1645981643, now seen corresponding path program 21 times [2018-01-23 14:44:14,570 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:14,570 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:14,571 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:14,571 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:14,571 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:14,581 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:14,873 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:14,873 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:14,878 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:44:14,886 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:14,888 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:14,889 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:14,890 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:14,891 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:14,892 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:14,894 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:14,895 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:14,896 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:14,898 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:14,899 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:14,900 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:14,901 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:14,903 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:15,190 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:15,211 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:15,212 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2018-01-23 14:44:15,212 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-01-23 14:44:15,212 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-01-23 14:44:15,213 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=872, Invalid=1384, Unknown=0, NotChecked=0, Total=2256 [2018-01-23 14:44:15,213 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 48 states. [2018-01-23 14:44:15,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:15,280 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-01-23 14:44:15,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-23 14:44:15,281 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 39 [2018-01-23 14:44:15,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:15,281 INFO L225 Difference]: With dead ends: 50 [2018-01-23 14:44:15,281 INFO L226 Difference]: Without dead ends: 41 [2018-01-23 14:44:15,282 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=898, Invalid=1454, Unknown=0, NotChecked=0, Total=2352 [2018-01-23 14:44:15,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-23 14:44:15,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-23 14:44:15,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-23 14:44:15,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-01-23 14:44:15,286 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-01-23 14:44:15,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:15,286 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-01-23 14:44:15,286 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-01-23 14:44:15,286 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-01-23 14:44:15,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-01-23 14:44:15,287 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:15,287 INFO L322 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:15,287 INFO L371 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:15,287 INFO L82 PathProgramCache]: Analyzing trace with hash 636005232, now seen corresponding path program 22 times [2018-01-23 14:44:15,287 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:15,287 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:15,288 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:15,288 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:15,288 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:15,297 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:15,615 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:15,615 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:15,620 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:44:15,634 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:15,635 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:15,903 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:15,903 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2018-01-23 14:44:15,903 INFO L409 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-01-23 14:44:15,904 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-01-23 14:44:15,904 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=1504, Unknown=0, NotChecked=0, Total=2450 [2018-01-23 14:44:15,904 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 50 states. [2018-01-23 14:44:15,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:15,972 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-01-23 14:44:15,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-23 14:44:15,973 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 40 [2018-01-23 14:44:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:15,973 INFO L225 Difference]: With dead ends: 51 [2018-01-23 14:44:15,973 INFO L226 Difference]: Without dead ends: 42 [2018-01-23 14:44:15,974 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=973, Invalid=1577, Unknown=0, NotChecked=0, Total=2550 [2018-01-23 14:44:15,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-01-23 14:44:15,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-01-23 14:44:15,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-23 14:44:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-01-23 14:44:15,977 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-01-23 14:44:15,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:15,977 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-01-23 14:44:15,977 INFO L433 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-01-23 14:44:15,978 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-01-23 14:44:15,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-23 14:44:15,978 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:15,978 INFO L322 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:15,978 INFO L371 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:15,979 INFO L82 PathProgramCache]: Analyzing trace with hash -608492437, now seen corresponding path program 23 times [2018-01-23 14:44:15,979 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:15,979 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:15,979 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:15,980 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:15,980 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:15,987 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:16,258 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:16,259 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:16,263 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:44:16,267 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,268 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,269 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,270 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,270 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,271 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,272 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,273 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,274 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,274 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,275 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,276 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,280 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:16,281 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:16,283 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:16,536 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:16,536 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2018-01-23 14:44:16,536 INFO L409 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-01-23 14:44:16,537 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-01-23 14:44:16,537 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=1629, Unknown=0, NotChecked=0, Total=2652 [2018-01-23 14:44:16,537 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 52 states. [2018-01-23 14:44:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:16,645 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-01-23 14:44:16,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-23 14:44:16,645 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 41 [2018-01-23 14:44:16,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:16,646 INFO L225 Difference]: With dead ends: 52 [2018-01-23 14:44:16,646 INFO L226 Difference]: Without dead ends: 43 [2018-01-23 14:44:16,646 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1051, Invalid=1705, Unknown=0, NotChecked=0, Total=2756 [2018-01-23 14:44:16,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-23 14:44:16,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-23 14:44:16,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-23 14:44:16,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-01-23 14:44:16,649 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-01-23 14:44:16,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:16,650 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-01-23 14:44:16,650 INFO L433 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-01-23 14:44:16,650 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-01-23 14:44:16,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-23 14:44:16,650 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:16,650 INFO L322 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:16,650 INFO L371 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:16,650 INFO L82 PathProgramCache]: Analyzing trace with hash -533214512, now seen corresponding path program 24 times [2018-01-23 14:44:16,650 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:16,651 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:16,651 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:16,651 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:16,651 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:16,660 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:17,036 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:17,036 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:17,042 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:44:17,048 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,050 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,051 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,052 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,053 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,054 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,055 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,056 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,057 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,058 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,059 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,060 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,062 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:17,062 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:17,063 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:17,311 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:17,311 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2018-01-23 14:44:17,311 INFO L409 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-01-23 14:44:17,312 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-01-23 14:44:17,312 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1103, Invalid=1759, Unknown=0, NotChecked=0, Total=2862 [2018-01-23 14:44:17,312 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 54 states. [2018-01-23 14:44:17,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:17,391 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-01-23 14:44:17,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-23 14:44:17,392 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 42 [2018-01-23 14:44:17,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:17,392 INFO L225 Difference]: With dead ends: 53 [2018-01-23 14:44:17,392 INFO L226 Difference]: Without dead ends: 44 [2018-01-23 14:44:17,393 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1132, Invalid=1838, Unknown=0, NotChecked=0, Total=2970 [2018-01-23 14:44:17,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-01-23 14:44:17,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-01-23 14:44:17,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-23 14:44:17,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-01-23 14:44:17,396 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-01-23 14:44:17,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:17,397 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-01-23 14:44:17,397 INFO L433 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-01-23 14:44:17,397 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-01-23 14:44:17,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-01-23 14:44:17,397 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:17,398 INFO L322 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:17,398 INFO L371 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:17,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1800401163, now seen corresponding path program 25 times [2018-01-23 14:44:17,398 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:17,398 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:17,399 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:17,399 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:17,399 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:17,408 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:17,752 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:17,753 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:17,758 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:17,773 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:18,036 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:18,036 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2018-01-23 14:44:18,037 INFO L409 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-01-23 14:44:18,037 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-01-23 14:44:18,038 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1186, Invalid=1894, Unknown=0, NotChecked=0, Total=3080 [2018-01-23 14:44:18,038 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 56 states. [2018-01-23 14:44:18,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:18,099 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-01-23 14:44:18,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-23 14:44:18,100 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 43 [2018-01-23 14:44:18,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:18,100 INFO L225 Difference]: With dead ends: 54 [2018-01-23 14:44:18,100 INFO L226 Difference]: Without dead ends: 45 [2018-01-23 14:44:18,101 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1216, Invalid=1976, Unknown=0, NotChecked=0, Total=3192 [2018-01-23 14:44:18,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-23 14:44:18,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-01-23 14:44:18,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-23 14:44:18,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-01-23 14:44:18,104 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-01-23 14:44:18,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:18,104 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-01-23 14:44:18,104 INFO L433 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-01-23 14:44:18,104 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-01-23 14:44:18,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-23 14:44:18,104 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:18,104 INFO L322 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:18,104 INFO L371 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:18,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1128043056, now seen corresponding path program 26 times [2018-01-23 14:44:18,105 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:18,105 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:18,105 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:18,105 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:18,105 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:18,116 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:18,440 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:18,441 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:18,445 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:18,453 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:18,458 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:18,460 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:18,461 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:18,759 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:18,759 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2018-01-23 14:44:18,759 INFO L409 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-01-23 14:44:18,760 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-01-23 14:44:18,760 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1272, Invalid=2034, Unknown=0, NotChecked=0, Total=3306 [2018-01-23 14:44:18,760 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 58 states. [2018-01-23 14:44:18,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:18,817 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-01-23 14:44:18,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-23 14:44:18,817 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 44 [2018-01-23 14:44:18,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:18,818 INFO L225 Difference]: With dead ends: 55 [2018-01-23 14:44:18,818 INFO L226 Difference]: Without dead ends: 46 [2018-01-23 14:44:18,818 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1303, Invalid=2119, Unknown=0, NotChecked=0, Total=3422 [2018-01-23 14:44:18,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-23 14:44:18,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-01-23 14:44:18,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-01-23 14:44:18,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-01-23 14:44:18,821 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-01-23 14:44:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:18,821 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-01-23 14:44:18,821 INFO L433 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-01-23 14:44:18,821 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-01-23 14:44:18,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-01-23 14:44:18,821 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:18,821 INFO L322 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:18,822 INFO L371 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:18,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1759778219, now seen corresponding path program 27 times [2018-01-23 14:44:18,822 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:18,822 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:18,822 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:18,822 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:18,823 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:18,833 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:19,262 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:19,262 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:19,267 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:44:19,274 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,276 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,277 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,278 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,279 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,280 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,281 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,282 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,283 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,285 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,286 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,287 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,288 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,289 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,290 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:19,290 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:19,293 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:19,600 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:19,600 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2018-01-23 14:44:19,600 INFO L409 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-01-23 14:44:19,601 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-01-23 14:44:19,601 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1361, Invalid=2179, Unknown=0, NotChecked=0, Total=3540 [2018-01-23 14:44:19,601 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 60 states. [2018-01-23 14:44:19,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:19,647 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-01-23 14:44:19,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-23 14:44:19,647 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 45 [2018-01-23 14:44:19,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:19,648 INFO L225 Difference]: With dead ends: 56 [2018-01-23 14:44:19,648 INFO L226 Difference]: Without dead ends: 47 [2018-01-23 14:44:19,648 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1393, Invalid=2267, Unknown=0, NotChecked=0, Total=3660 [2018-01-23 14:44:19,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-01-23 14:44:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-01-23 14:44:19,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-01-23 14:44:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-01-23 14:44:19,650 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-01-23 14:44:19,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:19,651 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-01-23 14:44:19,651 INFO L433 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-01-23 14:44:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-01-23 14:44:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-23 14:44:19,651 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:19,651 INFO L322 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:19,651 INFO L371 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:19,651 INFO L82 PathProgramCache]: Analyzing trace with hash -131268208, now seen corresponding path program 28 times [2018-01-23 14:44:19,651 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:19,651 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:19,652 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:19,652 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:19,652 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:19,662 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:20,112 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:20,112 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:20,119 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:44:20,138 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:20,140 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:20,550 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:20,550 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2018-01-23 14:44:20,551 INFO L409 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-01-23 14:44:20,551 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-01-23 14:44:20,551 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1453, Invalid=2329, Unknown=0, NotChecked=0, Total=3782 [2018-01-23 14:44:20,552 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 62 states. [2018-01-23 14:44:20,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:20,613 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-01-23 14:44:20,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-01-23 14:44:20,613 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 46 [2018-01-23 14:44:20,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:20,613 INFO L225 Difference]: With dead ends: 57 [2018-01-23 14:44:20,614 INFO L226 Difference]: Without dead ends: 48 [2018-01-23 14:44:20,614 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1486, Invalid=2420, Unknown=0, NotChecked=0, Total=3906 [2018-01-23 14:44:20,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-01-23 14:44:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-01-23 14:44:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-23 14:44:20,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-01-23 14:44:20,617 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-01-23 14:44:20,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:20,617 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-01-23 14:44:20,617 INFO L433 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-01-23 14:44:20,618 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-01-23 14:44:20,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-01-23 14:44:20,618 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:20,618 INFO L322 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:20,618 INFO L371 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:20,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1375834699, now seen corresponding path program 29 times [2018-01-23 14:44:20,619 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:20,619 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:20,619 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:20,619 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:20,619 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:20,633 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:21,005 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:21,005 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:21,010 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:44:21,014 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,015 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,015 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,016 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,017 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,018 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,018 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,019 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,020 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,021 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,022 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,023 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,023 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,024 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,025 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,029 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:21,030 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:21,032 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:21,386 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:21,387 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2018-01-23 14:44:21,387 INFO L409 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-01-23 14:44:21,388 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-01-23 14:44:21,388 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1548, Invalid=2484, Unknown=0, NotChecked=0, Total=4032 [2018-01-23 14:44:21,388 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 64 states. [2018-01-23 14:44:21,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:21,469 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-01-23 14:44:21,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-01-23 14:44:21,469 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 47 [2018-01-23 14:44:21,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:21,469 INFO L225 Difference]: With dead ends: 58 [2018-01-23 14:44:21,469 INFO L226 Difference]: Without dead ends: 49 [2018-01-23 14:44:21,470 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1582, Invalid=2578, Unknown=0, NotChecked=0, Total=4160 [2018-01-23 14:44:21,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-23 14:44:21,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-01-23 14:44:21,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-23 14:44:21,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-01-23 14:44:21,473 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-01-23 14:44:21,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:21,473 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-01-23 14:44:21,473 INFO L433 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-01-23 14:44:21,473 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-01-23 14:44:21,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-23 14:44:21,473 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:21,473 INFO L322 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:21,473 INFO L371 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:21,474 INFO L82 PathProgramCache]: Analyzing trace with hash 851384560, now seen corresponding path program 30 times [2018-01-23 14:44:21,474 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:21,474 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:21,474 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:21,475 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:21,475 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:21,483 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:21,864 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:21,864 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:21,869 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:44:21,875 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,877 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,878 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,879 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,880 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,881 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,882 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,883 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,884 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,885 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,886 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,887 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,888 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,890 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,891 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,892 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:21,893 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:21,894 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:22,241 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:22,241 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2018-01-23 14:44:22,241 INFO L409 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-01-23 14:44:22,242 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-01-23 14:44:22,242 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1646, Invalid=2644, Unknown=0, NotChecked=0, Total=4290 [2018-01-23 14:44:22,242 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 66 states. [2018-01-23 14:44:22,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:22,306 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-01-23 14:44:22,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-23 14:44:22,306 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 48 [2018-01-23 14:44:22,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:22,307 INFO L225 Difference]: With dead ends: 59 [2018-01-23 14:44:22,307 INFO L226 Difference]: Without dead ends: 50 [2018-01-23 14:44:22,308 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2005 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1681, Invalid=2741, Unknown=0, NotChecked=0, Total=4422 [2018-01-23 14:44:22,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-23 14:44:22,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-01-23 14:44:22,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-23 14:44:22,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-01-23 14:44:22,310 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-01-23 14:44:22,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:22,310 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-01-23 14:44:22,310 INFO L433 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-01-23 14:44:22,310 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-01-23 14:44:22,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-01-23 14:44:22,311 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:22,311 INFO L322 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:22,311 INFO L371 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:22,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1773299435, now seen corresponding path program 31 times [2018-01-23 14:44:22,311 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:22,311 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:22,312 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:22,312 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:22,312 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:22,324 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:22,742 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:22,742 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:22,748 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:22,764 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:23,130 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:23,131 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2018-01-23 14:44:23,131 INFO L409 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-01-23 14:44:23,132 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-01-23 14:44:23,132 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1747, Invalid=2809, Unknown=0, NotChecked=0, Total=4556 [2018-01-23 14:44:23,132 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 68 states. [2018-01-23 14:44:23,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:23,193 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-01-23 14:44:23,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-01-23 14:44:23,194 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 49 [2018-01-23 14:44:23,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:23,194 INFO L225 Difference]: With dead ends: 60 [2018-01-23 14:44:23,194 INFO L226 Difference]: Without dead ends: 51 [2018-01-23 14:44:23,195 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1783, Invalid=2909, Unknown=0, NotChecked=0, Total=4692 [2018-01-23 14:44:23,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-23 14:44:23,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-01-23 14:44:23,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-01-23 14:44:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-01-23 14:44:23,197 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-01-23 14:44:23,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:23,197 INFO L432 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-01-23 14:44:23,197 INFO L433 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-01-23 14:44:23,197 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-01-23 14:44:23,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-01-23 14:44:23,197 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:23,198 INFO L322 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:23,198 INFO L371 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:23,198 INFO L82 PathProgramCache]: Analyzing trace with hash 287889488, now seen corresponding path program 32 times [2018-01-23 14:44:23,198 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:23,198 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:23,198 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:23,199 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:23,199 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:23,211 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:23,734 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:23,734 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:23,739 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:23,746 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:23,752 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:23,754 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:23,756 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:24,138 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:24,138 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2018-01-23 14:44:24,139 INFO L409 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-01-23 14:44:24,139 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-01-23 14:44:24,139 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1851, Invalid=2979, Unknown=0, NotChecked=0, Total=4830 [2018-01-23 14:44:24,140 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 70 states. [2018-01-23 14:44:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:24,241 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-01-23 14:44:24,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-01-23 14:44:24,242 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 50 [2018-01-23 14:44:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:24,242 INFO L225 Difference]: With dead ends: 61 [2018-01-23 14:44:24,243 INFO L226 Difference]: Without dead ends: 52 [2018-01-23 14:44:24,243 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1888, Invalid=3082, Unknown=0, NotChecked=0, Total=4970 [2018-01-23 14:44:24,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-01-23 14:44:24,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-01-23 14:44:24,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-23 14:44:24,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-01-23 14:44:24,246 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-01-23 14:44:24,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:24,246 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-01-23 14:44:24,246 INFO L433 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-01-23 14:44:24,246 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-01-23 14:44:24,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-01-23 14:44:24,246 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:24,246 INFO L322 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:24,247 INFO L371 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:24,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1484821387, now seen corresponding path program 33 times [2018-01-23 14:44:24,247 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:24,247 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:24,247 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:24,247 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:24,247 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:24,259 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:24,712 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:24,712 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:24,717 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:44:24,724 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,726 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,727 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,728 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,729 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,730 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,731 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,732 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,733 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,734 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,735 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,736 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,737 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,738 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,740 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,741 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,742 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,743 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:24,743 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:24,745 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:25,149 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:25,149 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 72 [2018-01-23 14:44:25,149 INFO L409 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-01-23 14:44:25,150 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-01-23 14:44:25,150 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1958, Invalid=3154, Unknown=0, NotChecked=0, Total=5112 [2018-01-23 14:44:25,150 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 72 states. [2018-01-23 14:44:25,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:25,230 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-01-23 14:44:25,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-01-23 14:44:25,230 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 51 [2018-01-23 14:44:25,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:25,231 INFO L225 Difference]: With dead ends: 62 [2018-01-23 14:44:25,231 INFO L226 Difference]: Without dead ends: 53 [2018-01-23 14:44:25,231 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1996, Invalid=3260, Unknown=0, NotChecked=0, Total=5256 [2018-01-23 14:44:25,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-01-23 14:44:25,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-01-23 14:44:25,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-23 14:44:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-01-23 14:44:25,233 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-01-23 14:44:25,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:25,234 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-01-23 14:44:25,234 INFO L433 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-01-23 14:44:25,234 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-01-23 14:44:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-23 14:44:25,234 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:25,234 INFO L322 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:25,234 INFO L371 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:25,234 INFO L82 PathProgramCache]: Analyzing trace with hash -64995408, now seen corresponding path program 34 times [2018-01-23 14:44:25,234 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:25,235 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:25,235 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:25,235 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:25,235 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:25,244 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:25,711 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:25,711 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:25,716 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:44:25,733 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:25,735 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:26,159 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:26,159 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 74 [2018-01-23 14:44:26,160 INFO L409 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-01-23 14:44:26,160 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-01-23 14:44:26,160 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2068, Invalid=3334, Unknown=0, NotChecked=0, Total=5402 [2018-01-23 14:44:26,160 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 74 states. [2018-01-23 14:44:26,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:26,248 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-01-23 14:44:26,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-01-23 14:44:26,248 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 52 [2018-01-23 14:44:26,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:26,249 INFO L225 Difference]: With dead ends: 63 [2018-01-23 14:44:26,249 INFO L226 Difference]: Without dead ends: 54 [2018-01-23 14:44:26,249 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2545 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2107, Invalid=3443, Unknown=0, NotChecked=0, Total=5550 [2018-01-23 14:44:26,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-23 14:44:26,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-01-23 14:44:26,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-23 14:44:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-01-23 14:44:26,252 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-01-23 14:44:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:26,252 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-01-23 14:44:26,252 INFO L433 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-01-23 14:44:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-01-23 14:44:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-01-23 14:44:26,253 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:26,253 INFO L322 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:26,253 INFO L371 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:26,253 INFO L82 PathProgramCache]: Analyzing trace with hash -864675797, now seen corresponding path program 35 times [2018-01-23 14:44:26,253 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:26,253 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:26,254 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:26,254 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:26,254 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:26,263 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:26,837 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:26,837 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:26,842 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:44:26,846 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,847 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,847 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,848 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,849 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,850 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,851 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,851 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,852 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,853 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,854 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,855 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,856 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,857 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,858 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,859 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,860 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,861 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,865 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:26,866 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:26,868 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:27,614 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:27,614 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 76 [2018-01-23 14:44:27,614 INFO L409 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-01-23 14:44:27,615 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-01-23 14:44:27,615 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2181, Invalid=3519, Unknown=0, NotChecked=0, Total=5700 [2018-01-23 14:44:27,615 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 76 states. [2018-01-23 14:44:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:27,684 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-01-23 14:44:27,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-01-23 14:44:27,684 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 53 [2018-01-23 14:44:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:27,685 INFO L225 Difference]: With dead ends: 64 [2018-01-23 14:44:27,685 INFO L226 Difference]: Without dead ends: 55 [2018-01-23 14:44:27,685 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2221, Invalid=3631, Unknown=0, NotChecked=0, Total=5852 [2018-01-23 14:44:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-23 14:44:27,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-01-23 14:44:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-23 14:44:27,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-01-23 14:44:27,688 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-01-23 14:44:27,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:27,688 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-01-23 14:44:27,688 INFO L433 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-01-23 14:44:27,688 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-01-23 14:44:27,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-01-23 14:44:27,689 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:27,689 INFO L322 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:27,689 INFO L371 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:27,689 INFO L82 PathProgramCache]: Analyzing trace with hash 115035920, now seen corresponding path program 36 times [2018-01-23 14:44:27,689 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:27,689 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:27,689 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:27,690 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:27,690 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:27,701 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:28,413 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:28,413 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:28,418 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:44:28,426 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,427 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,428 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,429 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,430 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,431 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,433 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,434 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,435 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,436 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,437 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,438 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,439 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,440 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,442 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,443 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,444 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,445 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,446 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:28,447 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:28,449 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:28,913 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:28,913 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2018-01-23 14:44:28,913 INFO L409 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-01-23 14:44:28,913 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-01-23 14:44:28,914 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2297, Invalid=3709, Unknown=0, NotChecked=0, Total=6006 [2018-01-23 14:44:28,914 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 78 states. [2018-01-23 14:44:28,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:28,992 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-01-23 14:44:28,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-01-23 14:44:28,993 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 54 [2018-01-23 14:44:28,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:28,993 INFO L225 Difference]: With dead ends: 65 [2018-01-23 14:44:28,994 INFO L226 Difference]: Without dead ends: 56 [2018-01-23 14:44:28,994 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2839 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2338, Invalid=3824, Unknown=0, NotChecked=0, Total=6162 [2018-01-23 14:44:28,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-23 14:44:28,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-01-23 14:44:28,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-23 14:44:28,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-01-23 14:44:28,996 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-01-23 14:44:28,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:28,997 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-01-23 14:44:28,997 INFO L433 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-01-23 14:44:28,997 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-01-23 14:44:28,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-01-23 14:44:28,997 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:28,998 INFO L322 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:28,998 INFO L371 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:28,998 INFO L82 PathProgramCache]: Analyzing trace with hash 421328075, now seen corresponding path program 37 times [2018-01-23 14:44:28,998 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:28,998 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:28,999 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:28,999 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:28,999 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:29,010 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:29,583 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:29,584 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:29,588 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:29,607 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:30,150 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:30,150 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2018-01-23 14:44:30,151 INFO L409 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-01-23 14:44:30,151 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-01-23 14:44:30,151 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2416, Invalid=3904, Unknown=0, NotChecked=0, Total=6320 [2018-01-23 14:44:30,152 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 80 states. [2018-01-23 14:44:30,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:30,207 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-01-23 14:44:30,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-01-23 14:44:30,208 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 55 [2018-01-23 14:44:30,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:30,208 INFO L225 Difference]: With dead ends: 66 [2018-01-23 14:44:30,208 INFO L226 Difference]: Without dead ends: 57 [2018-01-23 14:44:30,208 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2458, Invalid=4022, Unknown=0, NotChecked=0, Total=6480 [2018-01-23 14:44:30,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-23 14:44:30,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-01-23 14:44:30,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-23 14:44:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-01-23 14:44:30,211 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-01-23 14:44:30,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:30,211 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-01-23 14:44:30,211 INFO L433 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-01-23 14:44:30,211 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-01-23 14:44:30,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-23 14:44:30,211 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:30,211 INFO L322 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:30,211 INFO L371 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:30,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1326450288, now seen corresponding path program 38 times [2018-01-23 14:44:30,212 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:30,212 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:30,212 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:30,212 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:30,212 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:30,226 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:30,827 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:30,827 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:30,833 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:30,840 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:30,848 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:30,850 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:30,852 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:31,364 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:31,365 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2018-01-23 14:44:31,365 INFO L409 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-01-23 14:44:31,366 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-01-23 14:44:31,366 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2538, Invalid=4104, Unknown=0, NotChecked=0, Total=6642 [2018-01-23 14:44:31,366 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 82 states. [2018-01-23 14:44:31,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:31,455 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-01-23 14:44:31,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-01-23 14:44:31,455 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 56 [2018-01-23 14:44:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:31,456 INFO L225 Difference]: With dead ends: 67 [2018-01-23 14:44:31,456 INFO L226 Difference]: Without dead ends: 58 [2018-01-23 14:44:31,456 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3149 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2581, Invalid=4225, Unknown=0, NotChecked=0, Total=6806 [2018-01-23 14:44:31,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-01-23 14:44:31,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-01-23 14:44:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-23 14:44:31,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-01-23 14:44:31,460 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-01-23 14:44:31,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:31,460 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-01-23 14:44:31,460 INFO L433 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-01-23 14:44:31,460 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-01-23 14:44:31,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-01-23 14:44:31,460 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:31,460 INFO L322 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:31,460 INFO L371 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:31,461 INFO L82 PathProgramCache]: Analyzing trace with hash -679532181, now seen corresponding path program 39 times [2018-01-23 14:44:31,461 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:31,461 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:31,461 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:31,461 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:31,461 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:31,471 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:32,077 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:32,077 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:32,082 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:44:32,089 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,091 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,092 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,093 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,094 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,095 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,096 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,097 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,098 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,099 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,100 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,101 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,102 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,103 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,104 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,106 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,107 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,108 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,109 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,111 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,112 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:32,112 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:32,114 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:32,651 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:32,651 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 84 [2018-01-23 14:44:32,651 INFO L409 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-01-23 14:44:32,651 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-01-23 14:44:32,652 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2663, Invalid=4309, Unknown=0, NotChecked=0, Total=6972 [2018-01-23 14:44:32,652 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 84 states. [2018-01-23 14:44:32,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:32,726 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-01-23 14:44:32,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-01-23 14:44:32,726 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 57 [2018-01-23 14:44:32,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:32,727 INFO L225 Difference]: With dead ends: 68 [2018-01-23 14:44:32,727 INFO L226 Difference]: Without dead ends: 59 [2018-01-23 14:44:32,727 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3310 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2707, Invalid=4433, Unknown=0, NotChecked=0, Total=7140 [2018-01-23 14:44:32,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-23 14:44:32,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-01-23 14:44:32,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-01-23 14:44:32,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-01-23 14:44:32,730 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-01-23 14:44:32,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:32,730 INFO L432 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-01-23 14:44:32,730 INFO L433 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-01-23 14:44:32,730 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-01-23 14:44:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-01-23 14:44:32,731 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:32,731 INFO L322 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:32,731 INFO L371 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:32,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1559520720, now seen corresponding path program 40 times [2018-01-23 14:44:32,731 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:32,731 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:32,731 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:32,732 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:32,732 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:32,741 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:33,362 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:33,363 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:33,367 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:44:33,383 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:33,385 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:33,940 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:33,940 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 86 [2018-01-23 14:44:33,941 INFO L409 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-01-23 14:44:33,941 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-01-23 14:44:33,941 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2791, Invalid=4519, Unknown=0, NotChecked=0, Total=7310 [2018-01-23 14:44:33,941 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 86 states. [2018-01-23 14:44:34,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:34,030 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-01-23 14:44:34,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-01-23 14:44:34,030 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 58 [2018-01-23 14:44:34,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:34,031 INFO L225 Difference]: With dead ends: 69 [2018-01-23 14:44:34,031 INFO L226 Difference]: Without dead ends: 60 [2018-01-23 14:44:34,032 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3475 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2836, Invalid=4646, Unknown=0, NotChecked=0, Total=7482 [2018-01-23 14:44:34,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-23 14:44:34,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-01-23 14:44:34,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-23 14:44:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-01-23 14:44:34,035 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-01-23 14:44:34,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:34,036 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-01-23 14:44:34,036 INFO L433 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-01-23 14:44:34,036 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-01-23 14:44:34,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-01-23 14:44:34,037 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:34,037 INFO L322 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:34,037 INFO L371 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:34,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2044283381, now seen corresponding path program 41 times [2018-01-23 14:44:34,037 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:34,037 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:34,038 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:34,038 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:34,038 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:34,055 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:34,717 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:34,717 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:34,723 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:44:34,728 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,729 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,729 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,730 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,731 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,732 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,733 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,734 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,735 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,736 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,737 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,738 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,739 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,740 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,741 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,742 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,743 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,744 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,745 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,747 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,748 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,752 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:34,753 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:34,756 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:35,346 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:35,346 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 88 [2018-01-23 14:44:35,347 INFO L409 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-01-23 14:44:35,347 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-01-23 14:44:35,347 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2922, Invalid=4734, Unknown=0, NotChecked=0, Total=7656 [2018-01-23 14:44:35,348 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 88 states. [2018-01-23 14:44:35,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:35,432 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-01-23 14:44:35,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-01-23 14:44:35,432 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 59 [2018-01-23 14:44:35,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:35,433 INFO L225 Difference]: With dead ends: 70 [2018-01-23 14:44:35,433 INFO L226 Difference]: Without dead ends: 61 [2018-01-23 14:44:35,433 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3644 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2968, Invalid=4864, Unknown=0, NotChecked=0, Total=7832 [2018-01-23 14:44:35,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-23 14:44:35,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-01-23 14:44:35,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-01-23 14:44:35,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-01-23 14:44:35,436 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-01-23 14:44:35,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:35,436 INFO L432 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-01-23 14:44:35,436 INFO L433 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-01-23 14:44:35,436 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-01-23 14:44:35,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-01-23 14:44:35,436 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:35,437 INFO L322 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:35,437 INFO L371 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:35,437 INFO L82 PathProgramCache]: Analyzing trace with hash -2093060816, now seen corresponding path program 42 times [2018-01-23 14:44:35,437 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:35,437 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:35,437 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:35,437 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:35,438 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:35,448 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:36,113 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:36,114 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:36,119 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:44:36,130 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,144 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,154 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,156 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,163 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,168 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,171 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,173 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,175 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,177 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,179 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,181 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,184 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,186 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,188 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,191 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,193 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,195 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,197 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,202 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,205 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,207 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:36,208 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:36,210 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:36,836 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:36,837 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 90 [2018-01-23 14:44:36,837 INFO L409 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-01-23 14:44:36,837 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-01-23 14:44:36,838 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3056, Invalid=4954, Unknown=0, NotChecked=0, Total=8010 [2018-01-23 14:44:36,838 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 90 states. [2018-01-23 14:44:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:36,925 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-01-23 14:44:36,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-01-23 14:44:36,925 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 60 [2018-01-23 14:44:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:36,926 INFO L225 Difference]: With dead ends: 71 [2018-01-23 14:44:36,927 INFO L226 Difference]: Without dead ends: 62 [2018-01-23 14:44:36,927 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3817 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3103, Invalid=5087, Unknown=0, NotChecked=0, Total=8190 [2018-01-23 14:44:36,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-01-23 14:44:36,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-01-23 14:44:36,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-01-23 14:44:36,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-01-23 14:44:36,931 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-01-23 14:44:36,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:36,932 INFO L432 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-01-23 14:44:36,932 INFO L433 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-01-23 14:44:36,932 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-01-23 14:44:36,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-01-23 14:44:36,932 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:36,933 INFO L322 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:36,933 INFO L371 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:36,933 INFO L82 PathProgramCache]: Analyzing trace with hash 689805995, now seen corresponding path program 43 times [2018-01-23 14:44:36,933 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:36,933 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:36,934 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:36,934 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:36,934 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:36,946 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:37,649 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:37,649 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:37,654 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:37,673 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:38,320 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:38,320 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 92 [2018-01-23 14:44:38,321 INFO L409 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-01-23 14:44:38,321 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-01-23 14:44:38,322 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3193, Invalid=5179, Unknown=0, NotChecked=0, Total=8372 [2018-01-23 14:44:38,322 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 92 states. [2018-01-23 14:44:38,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:38,407 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-01-23 14:44:38,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-01-23 14:44:38,407 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 61 [2018-01-23 14:44:38,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:38,408 INFO L225 Difference]: With dead ends: 72 [2018-01-23 14:44:38,408 INFO L226 Difference]: Without dead ends: 63 [2018-01-23 14:44:38,408 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3994 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3241, Invalid=5315, Unknown=0, NotChecked=0, Total=8556 [2018-01-23 14:44:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-01-23 14:44:38,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-01-23 14:44:38,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-01-23 14:44:38,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-01-23 14:44:38,411 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-01-23 14:44:38,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:38,411 INFO L432 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-01-23 14:44:38,411 INFO L433 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-01-23 14:44:38,411 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-01-23 14:44:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-01-23 14:44:38,411 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:38,411 INFO L322 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:38,411 INFO L371 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:38,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1059331216, now seen corresponding path program 44 times [2018-01-23 14:44:38,412 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:38,412 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:38,412 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:38,412 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:38,412 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:38,424 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:39,182 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:39,182 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:39,186 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:39,194 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:39,203 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:39,205 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:39,207 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:39,877 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:39,877 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 94 [2018-01-23 14:44:39,878 INFO L409 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-01-23 14:44:39,878 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-01-23 14:44:39,878 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3333, Invalid=5409, Unknown=0, NotChecked=0, Total=8742 [2018-01-23 14:44:39,878 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 94 states. [2018-01-23 14:44:39,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:39,971 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-01-23 14:44:39,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-01-23 14:44:39,972 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 62 [2018-01-23 14:44:39,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:39,972 INFO L225 Difference]: With dead ends: 73 [2018-01-23 14:44:39,972 INFO L226 Difference]: Without dead ends: 64 [2018-01-23 14:44:39,973 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4175 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3382, Invalid=5548, Unknown=0, NotChecked=0, Total=8930 [2018-01-23 14:44:39,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-01-23 14:44:39,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-01-23 14:44:39,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-01-23 14:44:39,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-01-23 14:44:39,977 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-01-23 14:44:39,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:39,977 INFO L432 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-01-23 14:44:39,977 INFO L433 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-01-23 14:44:39,977 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-01-23 14:44:39,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-01-23 14:44:39,978 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:39,978 INFO L322 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:39,978 INFO L371 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:39,978 INFO L82 PathProgramCache]: Analyzing trace with hash -370288821, now seen corresponding path program 45 times [2018-01-23 14:44:39,978 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:39,979 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:39,979 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:39,979 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:39,979 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:39,993 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:40,858 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:40,858 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:40,863 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:44:40,871 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,872 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,873 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,874 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,875 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,876 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,878 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,879 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,880 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,881 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,882 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,883 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,884 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,885 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,887 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,888 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,889 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,890 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,892 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,893 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,894 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,896 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,897 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,898 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:40,899 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:40,901 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:41,601 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:41,601 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2018-01-23 14:44:41,602 INFO L409 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-01-23 14:44:41,602 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-01-23 14:44:41,602 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3476, Invalid=5644, Unknown=0, NotChecked=0, Total=9120 [2018-01-23 14:44:41,603 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 96 states. [2018-01-23 14:44:41,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:41,693 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-01-23 14:44:41,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-01-23 14:44:41,693 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 63 [2018-01-23 14:44:41,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:41,693 INFO L225 Difference]: With dead ends: 74 [2018-01-23 14:44:41,693 INFO L226 Difference]: Without dead ends: 65 [2018-01-23 14:44:41,694 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4360 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3526, Invalid=5786, Unknown=0, NotChecked=0, Total=9312 [2018-01-23 14:44:41,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-01-23 14:44:41,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-01-23 14:44:41,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-01-23 14:44:41,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-01-23 14:44:41,696 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-01-23 14:44:41,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:41,697 INFO L432 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-01-23 14:44:41,697 INFO L433 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-01-23 14:44:41,697 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-01-23 14:44:41,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-01-23 14:44:41,697 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:41,697 INFO L322 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:41,697 INFO L371 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:41,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1738837008, now seen corresponding path program 46 times [2018-01-23 14:44:41,697 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:41,698 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:41,698 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:41,698 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:41,698 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:41,710 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:42,529 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:42,529 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:42,533 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:44:42,556 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:42,559 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:43,299 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:43,299 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2018-01-23 14:44:43,300 INFO L409 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-01-23 14:44:43,300 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-01-23 14:44:43,300 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3622, Invalid=5884, Unknown=0, NotChecked=0, Total=9506 [2018-01-23 14:44:43,301 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 98 states. [2018-01-23 14:44:43,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:43,402 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-01-23 14:44:43,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-01-23 14:44:43,403 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 64 [2018-01-23 14:44:43,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:43,403 INFO L225 Difference]: With dead ends: 75 [2018-01-23 14:44:43,403 INFO L226 Difference]: Without dead ends: 66 [2018-01-23 14:44:43,404 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4549 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3673, Invalid=6029, Unknown=0, NotChecked=0, Total=9702 [2018-01-23 14:44:43,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-01-23 14:44:43,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-01-23 14:44:43,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-23 14:44:43,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-01-23 14:44:43,406 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-01-23 14:44:43,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:43,406 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-01-23 14:44:43,407 INFO L433 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-01-23 14:44:43,407 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-01-23 14:44:43,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-01-23 14:44:43,407 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:43,407 INFO L322 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:43,407 INFO L371 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:43,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1214157845, now seen corresponding path program 47 times [2018-01-23 14:44:43,407 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:43,407 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:43,408 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:43,408 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:43,408 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:43,421 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:44,279 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:44,279 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:44,284 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:44:44,288 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,289 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,290 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,291 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,292 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,292 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,293 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,294 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,295 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,296 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,297 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,297 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,298 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,299 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,300 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,301 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,302 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,303 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,304 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,306 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,307 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,308 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,309 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,310 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,314 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:44,316 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:44,318 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:45,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:45,068 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:45,069 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 100 [2018-01-23 14:44:45,069 INFO L409 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-01-23 14:44:45,069 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-01-23 14:44:45,070 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3771, Invalid=6129, Unknown=0, NotChecked=0, Total=9900 [2018-01-23 14:44:45,070 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 100 states. [2018-01-23 14:44:45,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:45,198 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-01-23 14:44:45,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-01-23 14:44:45,199 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 65 [2018-01-23 14:44:45,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:45,199 INFO L225 Difference]: With dead ends: 76 [2018-01-23 14:44:45,199 INFO L226 Difference]: Without dead ends: 67 [2018-01-23 14:44:45,200 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4742 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3823, Invalid=6277, Unknown=0, NotChecked=0, Total=10100 [2018-01-23 14:44:45,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-01-23 14:44:45,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-01-23 14:44:45,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-01-23 14:44:45,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-01-23 14:44:45,203 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-01-23 14:44:45,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:45,204 INFO L432 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-01-23 14:44:45,204 INFO L433 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-01-23 14:44:45,204 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-01-23 14:44:45,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-01-23 14:44:45,204 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:45,205 INFO L322 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:45,205 INFO L371 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:45,205 INFO L82 PathProgramCache]: Analyzing trace with hash -2128972976, now seen corresponding path program 48 times [2018-01-23 14:44:45,205 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:45,205 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:45,206 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:45,206 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:45,206 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:45,226 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:46,067 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:46,067 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:46,076 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:44:46,084 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,086 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,087 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,088 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,089 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,090 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,091 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,092 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,093 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,094 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,095 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,096 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,097 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,098 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,099 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,101 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,102 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,103 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,104 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,106 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,107 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,109 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,110 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,112 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,113 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:44:46,114 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:46,116 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:47,102 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:47,102 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 102 [2018-01-23 14:44:47,103 INFO L409 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-01-23 14:44:47,103 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-01-23 14:44:47,104 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3923, Invalid=6379, Unknown=0, NotChecked=0, Total=10302 [2018-01-23 14:44:47,104 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 102 states. [2018-01-23 14:44:47,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:47,198 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-01-23 14:44:47,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-01-23 14:44:47,198 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 66 [2018-01-23 14:44:47,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:47,199 INFO L225 Difference]: With dead ends: 77 [2018-01-23 14:44:47,199 INFO L226 Difference]: Without dead ends: 68 [2018-01-23 14:44:47,199 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4939 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3976, Invalid=6530, Unknown=0, NotChecked=0, Total=10506 [2018-01-23 14:44:47,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-01-23 14:44:47,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-01-23 14:44:47,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-01-23 14:44:47,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-01-23 14:44:47,203 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-01-23 14:44:47,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:47,204 INFO L432 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-01-23 14:44:47,204 INFO L433 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-01-23 14:44:47,204 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-01-23 14:44:47,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-01-23 14:44:47,204 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:47,204 INFO L322 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:47,204 INFO L371 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:47,204 INFO L82 PathProgramCache]: Analyzing trace with hash -423470965, now seen corresponding path program 49 times [2018-01-23 14:44:47,205 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:47,205 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:47,205 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:47,205 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:47,205 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:47,218 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:48,134 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:48,134 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:48,139 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:48,160 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:48,957 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:48,968 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 104 [2018-01-23 14:44:48,968 INFO L409 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-01-23 14:44:48,969 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-01-23 14:44:48,970 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4078, Invalid=6634, Unknown=0, NotChecked=0, Total=10712 [2018-01-23 14:44:48,970 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 104 states. [2018-01-23 14:44:49,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:49,067 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-01-23 14:44:49,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-01-23 14:44:49,067 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 67 [2018-01-23 14:44:49,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:49,068 INFO L225 Difference]: With dead ends: 78 [2018-01-23 14:44:49,068 INFO L226 Difference]: Without dead ends: 69 [2018-01-23 14:44:49,068 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5140 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4132, Invalid=6788, Unknown=0, NotChecked=0, Total=10920 [2018-01-23 14:44:49,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-23 14:44:49,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-01-23 14:44:49,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-01-23 14:44:49,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-01-23 14:44:49,071 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-01-23 14:44:49,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:49,071 INFO L432 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-01-23 14:44:49,071 INFO L433 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-01-23 14:44:49,071 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-01-23 14:44:49,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-01-23 14:44:49,071 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:49,071 INFO L322 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:49,072 INFO L371 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:49,072 INFO L82 PathProgramCache]: Analyzing trace with hash 907483824, now seen corresponding path program 50 times [2018-01-23 14:44:49,072 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:49,072 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:49,072 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:49,073 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:44:49,073 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:49,090 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:50,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:50,004 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:50,004 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:50,009 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:44:50,016 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:50,025 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:44:50,028 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:50,030 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:50,865 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:50,865 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 106 [2018-01-23 14:44:50,866 INFO L409 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-01-23 14:44:50,866 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-01-23 14:44:50,867 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4236, Invalid=6894, Unknown=0, NotChecked=0, Total=11130 [2018-01-23 14:44:50,867 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 106 states. [2018-01-23 14:44:50,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:50,997 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-01-23 14:44:50,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-01-23 14:44:50,998 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 68 [2018-01-23 14:44:50,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:50,999 INFO L225 Difference]: With dead ends: 79 [2018-01-23 14:44:50,999 INFO L226 Difference]: Without dead ends: 70 [2018-01-23 14:44:50,999 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5345 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4291, Invalid=7051, Unknown=0, NotChecked=0, Total=11342 [2018-01-23 14:44:51,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-01-23 14:44:51,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-01-23 14:44:51,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-01-23 14:44:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-01-23 14:44:51,002 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-01-23 14:44:51,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:51,003 INFO L432 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-01-23 14:44:51,003 INFO L433 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-01-23 14:44:51,003 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-01-23 14:44:51,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-01-23 14:44:51,003 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:51,003 INFO L322 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:51,003 INFO L371 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:51,004 INFO L82 PathProgramCache]: Analyzing trace with hash -782590677, now seen corresponding path program 51 times [2018-01-23 14:44:51,004 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:51,004 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:51,004 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:51,004 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:51,004 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:51,018 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:52,115 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:52,115 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:52,120 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:44:52,127 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,131 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,132 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,133 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,134 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,135 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,136 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,137 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,138 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,139 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,140 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,142 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,143 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,144 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,145 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,146 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,148 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,149 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,150 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,151 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,153 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,154 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,156 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,157 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,158 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,160 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,161 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:44:52,162 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:52,164 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:53,014 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:53,014 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 108 [2018-01-23 14:44:53,014 INFO L409 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-01-23 14:44:53,015 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-01-23 14:44:53,016 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4397, Invalid=7159, Unknown=0, NotChecked=0, Total=11556 [2018-01-23 14:44:53,016 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 108 states. [2018-01-23 14:44:53,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:53,290 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-01-23 14:44:53,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-01-23 14:44:53,291 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 69 [2018-01-23 14:44:53,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:53,291 INFO L225 Difference]: With dead ends: 80 [2018-01-23 14:44:53,292 INFO L226 Difference]: Without dead ends: 71 [2018-01-23 14:44:53,292 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5554 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4453, Invalid=7319, Unknown=0, NotChecked=0, Total=11772 [2018-01-23 14:44:53,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-01-23 14:44:53,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-01-23 14:44:53,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-01-23 14:44:53,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-01-23 14:44:53,295 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-01-23 14:44:53,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:53,295 INFO L432 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-01-23 14:44:53,295 INFO L433 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-01-23 14:44:53,295 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-01-23 14:44:53,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-01-23 14:44:53,296 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:53,296 INFO L322 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:53,296 INFO L371 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:53,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1635292656, now seen corresponding path program 52 times [2018-01-23 14:44:53,296 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:53,296 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:53,296 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:53,297 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:53,297 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:53,320 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:44:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:54,492 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:44:54,492 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:44:54,499 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:44:54,525 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:44:54,527 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:44:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:44:55,573 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:44:55,573 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 110 [2018-01-23 14:44:55,573 INFO L409 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-01-23 14:44:55,574 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-01-23 14:44:55,574 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4561, Invalid=7429, Unknown=0, NotChecked=0, Total=11990 [2018-01-23 14:44:55,574 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 110 states. [2018-01-23 14:44:55,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:44:55,709 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-01-23 14:44:55,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-01-23 14:44:55,709 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 70 [2018-01-23 14:44:55,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:44:55,710 INFO L225 Difference]: With dead ends: 81 [2018-01-23 14:44:55,710 INFO L226 Difference]: Without dead ends: 72 [2018-01-23 14:44:55,710 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5767 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4618, Invalid=7592, Unknown=0, NotChecked=0, Total=12210 [2018-01-23 14:44:55,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-01-23 14:44:55,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-01-23 14:44:55,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-01-23 14:44:55,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-01-23 14:44:55,713 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-01-23 14:44:55,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:44:55,713 INFO L432 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-01-23 14:44:55,713 INFO L433 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-01-23 14:44:55,713 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-01-23 14:44:55,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-01-23 14:44:55,713 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:44:55,713 INFO L322 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:44:55,713 INFO L371 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:44:55,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1995717067, now seen corresponding path program 53 times [2018-01-23 14:44:55,714 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:44:55,714 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:44:55,714 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:55,714 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:44:55,714 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:44:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:44:55,730 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. Received shutdown request... [2018-01-23 14:44:55,889 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-23 14:44:55,891 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:44:55,891 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:44:55,891 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:44:55,891 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:44:55,891 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:44:55,891 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:44:55,891 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:44:55,891 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-23 14:44:55,892 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:44:55,892 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-01-23 14:44:55,892 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-23 14:44:55,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.01 02:44:55 BoogieIcfgContainer [2018-01-23 14:44:55,893 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-23 14:44:55,894 INFO L168 Benchmark]: Toolchain (without parser) took 51119.54 ms. Allocated memory was 300.9 MB in the beginning and 814.2 MB in the end (delta: 513.3 MB). Free memory was 261.9 MB in the beginning and 413.2 MB in the end (delta: -151.3 MB). Peak memory consumption was 362.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:44:55,895 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 300.9 MB. Free memory is still 266.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 14:44:55,895 INFO L168 Benchmark]: CACSL2BoogieTranslator took 188.51 ms. Allocated memory is still 300.9 MB. Free memory was 260.9 MB in the beginning and 253.6 MB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 5.3 GB. [2018-01-23 14:44:55,896 INFO L168 Benchmark]: Boogie Preprocessor took 36.79 ms. Allocated memory is still 300.9 MB. Free memory was 253.6 MB in the beginning and 251.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:44:55,896 INFO L168 Benchmark]: RCFGBuilder took 165.45 ms. Allocated memory is still 300.9 MB. Free memory was 251.6 MB in the beginning and 239.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 5.3 GB. [2018-01-23 14:44:55,897 INFO L168 Benchmark]: TraceAbstraction took 50720.54 ms. Allocated memory was 300.9 MB in the beginning and 814.2 MB in the end (delta: 513.3 MB). Free memory was 238.5 MB in the beginning and 413.2 MB in the end (delta: -174.6 MB). Peak memory consumption was 338.7 MB. Max. memory is 5.3 GB. [2018-01-23 14:44:55,898 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 300.9 MB. Free memory is still 266.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 188.51 ms. Allocated memory is still 300.9 MB. Free memory was 260.9 MB in the beginning and 253.6 MB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 36.79 ms. Allocated memory is still 300.9 MB. Free memory was 253.6 MB in the beginning and 251.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 165.45 ms. Allocated memory is still 300.9 MB. Free memory was 251.6 MB in the beginning and 239.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 5.3 GB. * TraceAbstraction took 50720.54 ms. Allocated memory was 300.9 MB in the beginning and 814.2 MB in the end (delta: 513.3 MB). Free memory was 238.5 MB in the beginning and 413.2 MB in the end (delta: -174.6 MB). Peak memory consumption was 338.7 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 22 locations, 3 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 1). Cancelled while BasicCegarLoop was analyzing trace of length 72 with TraceHistMax 53, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 11 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 22 locations, 3 error locations. TIMEOUT Result, 50.5s OverallTime, 54 OverallIterations, 53 TraceHistogramMax, 4.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 904 SDtfs, 171 SDslu, 24617 SDs, 0 SdLazy, 5508 SolverSat, 198 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3905 GetRequests, 886 SyntacticMatches, 0 SemanticMatches, 3019 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105846 ImplicationChecksByTransitivity, 40.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 53 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 42.1s InterpolantComputationTime, 4646 NumberOfCodeBlocks, 4646 NumberOfCodeBlocksAsserted, 465 NumberOfCheckSat, 4541 ConstructedInterpolants, 0 QuantifiedInterpolants, 897217 SizeOfPredicates, 52 NumberOfNonLiveVariables, 7514 ConjunctsInSsa, 1534 ConjunctsInUnsatCore, 105 InterpolantComputations, 1 PerfectInterpolantSequences, 0/49608 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 25). Cancelled while IsEmpty was searching accepting run (input had 22 states). - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 22 locations, 3 error locations. TIMEOUT Result, 0.0s OverallTime, 0 OverallIterations, 0 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset3_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-23_14-44-55-907.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset3_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-23_14-44-55-907.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset3_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-23_14-44-55-907.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset3_true-valid-memsafety_true-termination.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-23_14-44-55-907.csv Completed graceful shutdown