java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/memsetNonZero_false-valid-deref-write.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-20 22:14:28,242 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 22:14:28,243 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 22:14:28,258 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 22:14:28,259 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 22:14:28,260 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 22:14:28,261 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 22:14:28,262 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 22:14:28,264 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 22:14:28,265 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 22:14:28,266 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-20 22:14:28,266 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-20 22:14:28,267 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-20 22:14:28,268 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-20 22:14:28,269 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-20 22:14:28,272 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-20 22:14:28,274 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-20 22:14:28,276 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-20 22:14:28,277 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-20 22:14:28,278 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-20 22:14:28,281 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-20 22:14:28,281 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-20 22:14:28,281 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-20 22:14:28,282 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-20 22:14:28,283 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-20 22:14:28,285 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-20 22:14:28,285 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-20 22:14:28,285 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-20 22:14:28,286 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-20 22:14:28,286 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-20 22:14:28,286 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-20 22:14:28,287 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 [2018-01-20 22:14:28,295 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 22:14:28,296 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 22:14:28,296 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 22:14:28,297 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 22:14:28,297 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 22:14:28,297 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 22:14:28,297 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 22:14:28,297 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 22:14:28,297 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 22:14:28,298 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 22:14:28,298 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 22:14:28,298 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 22:14:28,298 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 22:14:28,298 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 22:14:28,298 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 22:14:28,298 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 22:14:28,298 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 22:14:28,299 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 22:14:28,299 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 22:14:28,299 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 22:14:28,299 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 22:14:28,299 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 22:14:28,299 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 22:14:28,300 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 22:14:28,300 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 22:14:28,300 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 22:14:28,300 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 22:14:28,300 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 22:14:28,300 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 22:14:28,301 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 22:14:28,301 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 22:14:28,301 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-20 22:14:28,301 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 22:14:28,301 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 22:14:28,301 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 22:14:28,302 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 22:14:28,302 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 22:14:28,333 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 22:14:28,343 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 22:14:28,346 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 22:14:28,347 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 22:14:28,348 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 22:14:28,348 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/memsetNonZero_false-valid-deref-write.c [2018-01-20 22:14:28,447 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 22:14:28,451 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 22:14:28,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 22:14:28,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 22:14:28,457 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 22:14:28,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 10:14:28" (1/1) ... [2018-01-20 22:14:28,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8d55d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:14:28, skipping insertion in model container [2018-01-20 22:14:28,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 10:14:28" (1/1) ... [2018-01-20 22:14:28,475 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 22:14:28,489 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 22:14:28,597 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 22:14:28,612 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 22:14:28,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:14:28 WrapperNode [2018-01-20 22:14:28,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 22:14:28,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 22:14:28,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 22:14:28,619 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 22:14:28,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:14:28" (1/1) ... [2018-01-20 22:14:28,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:14:28" (1/1) ... [2018-01-20 22:14:28,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:14:28" (1/1) ... [2018-01-20 22:14:28,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:14:28" (1/1) ... [2018-01-20 22:14:28,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:14:28" (1/1) ... [2018-01-20 22:14:28,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:14:28" (1/1) ... [2018-01-20 22:14:28,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:14:28" (1/1) ... [2018-01-20 22:14:28,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 22:14:28,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 22:14:28,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 22:14:28,647 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 22:14:28,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:14:28" (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 [2018-01-20 22:14:28,702 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 22:14:28,703 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 22:14:28,703 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 22:14:28,703 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 22:14:28,703 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 22:14:28,703 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 22:14:28,703 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-01-20 22:14:28,704 INFO L136 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-01-20 22:14:28,704 INFO L128 BoogieDeclarations]: Found specification of procedure memset [2018-01-20 22:14:28,704 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 22:14:28,704 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 22:14:28,704 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 22:14:28,823 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 22:14:28,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:14:28 BoogieIcfgContainer [2018-01-20 22:14:28,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 22:14:28,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 22:14:28,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 22:14:28,827 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 22:14:28,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 10:14:28" (1/3) ... [2018-01-20 22:14:28,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f78c4fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:14:28, skipping insertion in model container [2018-01-20 22:14:28,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:14:28" (2/3) ... [2018-01-20 22:14:28,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f78c4fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:14:28, skipping insertion in model container [2018-01-20 22:14:28,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:14:28" (3/3) ... [2018-01-20 22:14:28,830 INFO L105 eAbstractionObserver]: Analyzing ICFG memsetNonZero_false-valid-deref-write.c [2018-01-20 22:14:28,841 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 22:14:28,849 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-20 22:14:28,885 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:14:28,885 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:14:28,885 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:14:28,886 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:14:28,886 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:14:28,886 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:14:28,886 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:14:28,886 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-20 22:14:28,887 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:14:28,901 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-01-20 22:14:28,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-20 22:14:28,906 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:28,907 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-20 22:14:28,907 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-20 22:14:28,912 INFO L82 PathProgramCache]: Analyzing trace with hash 50935, now seen corresponding path program 1 times [2018-01-20 22:14:28,914 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:28,915 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:28,965 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:28,965 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:28,965 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 22:14:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 22:14:29,021 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 22:14:29,026 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 22:14:29,033 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:14:29,033 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:14:29,033 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:14:29,033 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:14:29,033 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:14:29,034 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:14:29,034 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:14:29,034 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-20 22:14:29,034 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:14:29,035 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-01-20 22:14:29,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-20 22:14:29,036 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:29,036 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:29,036 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:29,036 INFO L82 PathProgramCache]: Analyzing trace with hash 457189328, now seen corresponding path program 1 times [2018-01-20 22:14:29,037 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:29,037 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:29,038 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:29,038 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:29,038 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:29,066 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:29,142 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:14:29,142 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-20 22:14:29,143 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-20 22:14:29,154 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-20 22:14:29,154 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-20 22:14:29,156 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 4 states. [2018-01-20 22:14:29,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:29,218 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-01-20 22:14:29,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-20 22:14:29,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-01-20 22:14:29,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:29,227 INFO L225 Difference]: With dead ends: 33 [2018-01-20 22:14:29,227 INFO L226 Difference]: Without dead ends: 19 [2018-01-20 22:14:29,229 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 [2018-01-20 22:14:29,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-01-20 22:14:29,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-01-20 22:14:29,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-01-20 22:14:29,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-01-20 22:14:29,320 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-01-20 22:14:29,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:29,321 INFO L432 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-01-20 22:14:29,321 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-20 22:14:29,321 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-01-20 22:14:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-20 22:14:29,321 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:29,322 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:29,322 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:29,322 INFO L82 PathProgramCache]: Analyzing trace with hash -114007861, now seen corresponding path program 1 times [2018-01-20 22:14:29,322 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:29,322 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:29,323 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:29,323 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:29,323 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:29,340 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:29,405 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:29,405 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 [2018-01-20 22:14:29,415 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:29,447 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:29,493 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:29,493 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-01-20 22:14:29,494 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-20 22:14:29,494 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-20 22:14:29,494 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-01-20 22:14:29,494 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 6 states. [2018-01-20 22:14:29,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:29,523 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-01-20 22:14:29,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-20 22:14:29,523 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-01-20 22:14:29,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:29,524 INFO L225 Difference]: With dead ends: 29 [2018-01-20 22:14:29,524 INFO L226 Difference]: Without dead ends: 20 [2018-01-20 22:14:29,525 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-01-20 22:14:29,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-01-20 22:14:29,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-01-20 22:14:29,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-01-20 22:14:29,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-01-20 22:14:29,530 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-01-20 22:14:29,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:29,530 INFO L432 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-01-20 22:14:29,531 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-20 22:14:29,531 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-01-20 22:14:29,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-20 22:14:29,531 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:29,532 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:29,532 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:29,532 INFO L82 PathProgramCache]: Analyzing trace with hash -641251536, now seen corresponding path program 2 times [2018-01-20 22:14:29,532 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:29,532 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:29,533 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:29,534 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:29,534 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:29,548 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:29,617 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:29,617 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 [2018-01-20 22:14:29,628 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:14:29,645 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:29,648 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:29,650 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:29,652 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:29,701 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:29,701 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-01-20 22:14:29,701 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-20 22:14:29,702 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-20 22:14:29,702 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-20 22:14:29,702 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2018-01-20 22:14:29,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:29,730 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-01-20 22:14:29,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-20 22:14:29,730 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-01-20 22:14:29,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:29,731 INFO L225 Difference]: With dead ends: 30 [2018-01-20 22:14:29,731 INFO L226 Difference]: Without dead ends: 21 [2018-01-20 22:14:29,731 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-01-20 22:14:29,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-01-20 22:14:29,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-01-20 22:14:29,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-01-20 22:14:29,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-01-20 22:14:29,735 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-01-20 22:14:29,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:29,736 INFO L432 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-01-20 22:14:29,736 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-20 22:14:29,736 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-01-20 22:14:29,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-20 22:14:29,737 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:29,737 INFO L322 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:29,737 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:29,737 INFO L82 PathProgramCache]: Analyzing trace with hash 194063723, now seen corresponding path program 3 times [2018-01-20 22:14:29,738 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:29,738 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:29,739 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:29,739 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:29,739 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:29,750 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:29,827 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:29,828 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 [2018-01-20 22:14:29,836 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:14:29,847 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:29,850 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:29,851 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:29,852 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:29,854 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:29,899 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:29,899 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-01-20 22:14:29,900 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-20 22:14:29,900 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-20 22:14:29,900 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-01-20 22:14:29,901 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2018-01-20 22:14:29,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:29,973 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-01-20 22:14:29,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-20 22:14:29,973 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-01-20 22:14:29,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:29,974 INFO L225 Difference]: With dead ends: 31 [2018-01-20 22:14:29,974 INFO L226 Difference]: Without dead ends: 22 [2018-01-20 22:14:29,975 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-01-20 22:14:29,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-01-20 22:14:29,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-01-20 22:14:29,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-01-20 22:14:29,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-01-20 22:14:29,979 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-01-20 22:14:29,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:29,980 INFO L432 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-01-20 22:14:29,980 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-20 22:14:29,980 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-01-20 22:14:29,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-20 22:14:29,981 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:29,981 INFO L322 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:29,981 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:29,981 INFO L82 PathProgramCache]: Analyzing trace with hash 319032976, now seen corresponding path program 4 times [2018-01-20 22:14:29,981 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:29,981 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:29,982 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:29,982 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:29,982 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:29,995 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:30,106 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:30,106 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 [2018-01-20 22:14:30,121 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:14:30,148 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:30,150 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:30,192 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:30,193 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-01-20 22:14:30,193 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-20 22:14:30,193 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-20 22:14:30,193 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-01-20 22:14:30,194 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 9 states. [2018-01-20 22:14:30,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:30,214 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-01-20 22:14:30,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-20 22:14:30,214 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2018-01-20 22:14:30,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:30,215 INFO L225 Difference]: With dead ends: 32 [2018-01-20 22:14:30,215 INFO L226 Difference]: Without dead ends: 23 [2018-01-20 22:14:30,216 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-20 22:14:30,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-01-20 22:14:30,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-01-20 22:14:30,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-01-20 22:14:30,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-01-20 22:14:30,219 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-01-20 22:14:30,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:30,219 INFO L432 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-01-20 22:14:30,219 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-20 22:14:30,219 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-01-20 22:14:30,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-20 22:14:30,220 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:30,220 INFO L322 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:30,220 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:30,220 INFO L82 PathProgramCache]: Analyzing trace with hash -101887477, now seen corresponding path program 5 times [2018-01-20 22:14:30,220 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:30,220 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:30,221 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:30,221 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:30,221 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:30,234 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:30,322 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:30,322 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 [2018-01-20 22:14:30,332 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:14:30,337 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:30,338 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:30,340 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:30,345 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:30,347 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:30,349 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:30,417 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:30,417 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-01-20 22:14:30,418 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-20 22:14:30,418 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-20 22:14:30,418 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-01-20 22:14:30,418 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 10 states. [2018-01-20 22:14:30,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:30,464 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-01-20 22:14:30,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-20 22:14:30,465 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-01-20 22:14:30,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:30,466 INFO L225 Difference]: With dead ends: 33 [2018-01-20 22:14:30,466 INFO L226 Difference]: Without dead ends: 24 [2018-01-20 22:14:30,466 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-01-20 22:14:30,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-01-20 22:14:30,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-01-20 22:14:30,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-01-20 22:14:30,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-01-20 22:14:30,471 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-01-20 22:14:30,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:30,471 INFO L432 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-01-20 22:14:30,471 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-20 22:14:30,471 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-01-20 22:14:30,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-20 22:14:30,472 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:30,472 INFO L322 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:30,472 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:30,472 INFO L82 PathProgramCache]: Analyzing trace with hash -265519632, now seen corresponding path program 6 times [2018-01-20 22:14:30,472 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:30,473 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:30,473 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:30,474 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:30,474 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:30,484 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:30,577 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:30,578 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 [2018-01-20 22:14:30,586 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:14:30,599 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:30,602 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:30,606 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:30,607 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:30,608 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:30,610 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:30,644 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:30,645 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-01-20 22:14:30,645 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-20 22:14:30,645 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-20 22:14:30,646 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2018-01-20 22:14:30,646 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 11 states. [2018-01-20 22:14:30,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:30,681 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-01-20 22:14:30,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-20 22:14:30,682 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2018-01-20 22:14:30,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:30,683 INFO L225 Difference]: With dead ends: 34 [2018-01-20 22:14:30,683 INFO L226 Difference]: Without dead ends: 25 [2018-01-20 22:14:30,683 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-01-20 22:14:30,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-01-20 22:14:30,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-01-20 22:14:30,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-01-20 22:14:30,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-01-20 22:14:30,687 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-01-20 22:14:30,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:30,687 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-01-20 22:14:30,688 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-20 22:14:30,688 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-01-20 22:14:30,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-20 22:14:30,688 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:30,688 INFO L322 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:30,688 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:30,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1043149141, now seen corresponding path program 7 times [2018-01-20 22:14:30,689 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:30,689 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:30,689 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:30,689 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:30,690 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:30,699 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:30,787 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:30,787 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 [2018-01-20 22:14:30,792 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:30,805 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:30,841 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:30,842 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-01-20 22:14:30,842 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-20 22:14:30,842 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-20 22:14:30,842 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2018-01-20 22:14:30,843 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 12 states. [2018-01-20 22:14:30,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:30,886 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-01-20 22:14:30,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-20 22:14:30,889 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2018-01-20 22:14:30,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:30,889 INFO L225 Difference]: With dead ends: 35 [2018-01-20 22:14:30,890 INFO L226 Difference]: Without dead ends: 26 [2018-01-20 22:14:30,890 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-01-20 22:14:30,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-01-20 22:14:30,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-01-20 22:14:30,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-01-20 22:14:30,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-01-20 22:14:30,893 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-01-20 22:14:30,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:30,893 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-01-20 22:14:30,893 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-20 22:14:30,893 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-01-20 22:14:30,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-20 22:14:30,894 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:30,894 INFO L322 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:30,894 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:30,894 INFO L82 PathProgramCache]: Analyzing trace with hash 620139856, now seen corresponding path program 8 times [2018-01-20 22:14:30,895 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:30,895 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:30,895 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:30,895 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:30,896 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:30,906 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:31,061 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:31,061 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 [2018-01-20 22:14:31,080 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:14:31,090 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:31,095 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:31,096 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:31,099 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:31,152 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:31,152 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-01-20 22:14:31,153 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-20 22:14:31,153 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-20 22:14:31,153 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2018-01-20 22:14:31,153 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 13 states. [2018-01-20 22:14:31,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:31,222 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-01-20 22:14:31,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-20 22:14:31,222 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-01-20 22:14:31,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:31,223 INFO L225 Difference]: With dead ends: 36 [2018-01-20 22:14:31,223 INFO L226 Difference]: Without dead ends: 27 [2018-01-20 22:14:31,223 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2018-01-20 22:14:31,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-01-20 22:14:31,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-01-20 22:14:31,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-01-20 22:14:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-01-20 22:14:31,227 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-01-20 22:14:31,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:31,228 INFO L432 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-01-20 22:14:31,228 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-20 22:14:31,228 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-01-20 22:14:31,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-20 22:14:31,228 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:31,229 INFO L322 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:31,229 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:31,229 INFO L82 PathProgramCache]: Analyzing trace with hash 642491211, now seen corresponding path program 9 times [2018-01-20 22:14:31,229 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:31,229 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:31,230 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:31,230 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:31,230 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:31,240 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:31,388 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:31,388 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 [2018-01-20 22:14:31,393 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:14:31,404 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:31,406 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:31,407 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:31,410 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:31,413 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:31,416 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:31,417 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:31,419 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:31,438 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:31,459 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:31,459 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-01-20 22:14:31,459 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-20 22:14:31,460 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-20 22:14:31,460 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2018-01-20 22:14:31,460 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-01-20 22:14:31,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:31,554 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-01-20 22:14:31,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-20 22:14:31,556 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-01-20 22:14:31,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:31,556 INFO L225 Difference]: With dead ends: 37 [2018-01-20 22:14:31,557 INFO L226 Difference]: Without dead ends: 28 [2018-01-20 22:14:31,557 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-01-20 22:14:31,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-01-20 22:14:31,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-01-20 22:14:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-01-20 22:14:31,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-01-20 22:14:31,561 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-01-20 22:14:31,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:31,561 INFO L432 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-01-20 22:14:31,561 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-20 22:14:31,561 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-01-20 22:14:31,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-20 22:14:31,562 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:31,562 INFO L322 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:31,562 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:31,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1335383216, now seen corresponding path program 10 times [2018-01-20 22:14:31,563 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:31,563 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:31,564 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:31,564 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:31,564 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:31,574 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:31,798 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:31,798 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 [2018-01-20 22:14:31,804 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:14:31,816 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:31,818 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:31,865 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:31,865 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-01-20 22:14:31,865 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-20 22:14:31,865 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-20 22:14:31,866 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2018-01-20 22:14:31,866 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 15 states. [2018-01-20 22:14:31,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:31,897 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-01-20 22:14:31,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-20 22:14:31,897 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2018-01-20 22:14:31,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:31,898 INFO L225 Difference]: With dead ends: 38 [2018-01-20 22:14:31,898 INFO L226 Difference]: Without dead ends: 29 [2018-01-20 22:14:31,899 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2018-01-20 22:14:31,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-01-20 22:14:31,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-01-20 22:14:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-01-20 22:14:31,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-01-20 22:14:31,903 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-01-20 22:14:31,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:31,903 INFO L432 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-01-20 22:14:31,904 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-20 22:14:31,904 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-01-20 22:14:31,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-20 22:14:31,904 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:31,905 INFO L322 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:31,905 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:31,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1340198891, now seen corresponding path program 11 times [2018-01-20 22:14:31,905 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:31,905 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:31,906 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:31,906 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:31,906 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:31,916 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:32,102 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:32,102 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 [2018-01-20 22:14:32,107 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:14:32,110 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:32,112 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:32,112 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:32,113 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:32,114 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:32,115 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:32,120 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:32,121 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:32,123 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:32,159 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:32,159 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-01-20 22:14:32,160 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-20 22:14:32,160 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-20 22:14:32,160 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2018-01-20 22:14:32,160 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 16 states. [2018-01-20 22:14:32,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:32,184 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-01-20 22:14:32,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-20 22:14:32,185 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2018-01-20 22:14:32,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:32,185 INFO L225 Difference]: With dead ends: 39 [2018-01-20 22:14:32,185 INFO L226 Difference]: Without dead ends: 30 [2018-01-20 22:14:32,186 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2018-01-20 22:14:32,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-01-20 22:14:32,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-01-20 22:14:32,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-01-20 22:14:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-01-20 22:14:32,189 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-01-20 22:14:32,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:32,189 INFO L432 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-01-20 22:14:32,189 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-20 22:14:32,189 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-01-20 22:14:32,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-20 22:14:32,190 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:32,190 INFO L322 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:32,190 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:32,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1489484816, now seen corresponding path program 12 times [2018-01-20 22:14:32,191 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:32,191 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:32,192 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:32,192 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:32,192 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:32,201 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:32,287 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:32,288 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 [2018-01-20 22:14:32,292 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:14:32,299 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:32,300 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:32,301 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:32,302 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:32,303 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:32,304 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:32,305 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:32,306 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:32,307 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:32,340 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:32,340 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-01-20 22:14:32,341 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-20 22:14:32,341 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-20 22:14:32,341 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2018-01-20 22:14:32,341 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 17 states. [2018-01-20 22:14:32,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:32,379 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-01-20 22:14:32,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-20 22:14:32,380 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2018-01-20 22:14:32,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:32,380 INFO L225 Difference]: With dead ends: 40 [2018-01-20 22:14:32,380 INFO L226 Difference]: Without dead ends: 31 [2018-01-20 22:14:32,381 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2018-01-20 22:14:32,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-01-20 22:14:32,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-01-20 22:14:32,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-01-20 22:14:32,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-01-20 22:14:32,385 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-01-20 22:14:32,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:32,385 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-01-20 22:14:32,385 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-20 22:14:32,385 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-01-20 22:14:32,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-20 22:14:32,386 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:32,386 INFO L322 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:32,387 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:32,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1822381195, now seen corresponding path program 13 times [2018-01-20 22:14:32,387 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:32,387 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:32,388 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:32,388 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:32,388 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:32,396 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:32,497 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:32,497 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 [2018-01-20 22:14:32,502 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:32,514 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:32,550 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:32,550 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-01-20 22:14:32,551 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-20 22:14:32,551 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-20 22:14:32,551 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2018-01-20 22:14:32,551 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 18 states. [2018-01-20 22:14:32,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:32,588 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-01-20 22:14:32,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-20 22:14:32,588 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 30 [2018-01-20 22:14:32,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:32,589 INFO L225 Difference]: With dead ends: 41 [2018-01-20 22:14:32,589 INFO L226 Difference]: Without dead ends: 32 [2018-01-20 22:14:32,590 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=142, Invalid=200, Unknown=0, NotChecked=0, Total=342 [2018-01-20 22:14:32,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-01-20 22:14:32,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-01-20 22:14:32,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-01-20 22:14:32,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-01-20 22:14:32,594 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-01-20 22:14:32,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:32,594 INFO L432 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-01-20 22:14:32,594 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-20 22:14:32,595 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-01-20 22:14:32,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-20 22:14:32,595 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:32,595 INFO L322 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:32,595 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:32,596 INFO L82 PathProgramCache]: Analyzing trace with hash -742732944, now seen corresponding path program 14 times [2018-01-20 22:14:32,596 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:32,596 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:32,597 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:32,597 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:32,597 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:32,604 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:32,793 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:32,794 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 [2018-01-20 22:14:32,799 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:14:32,807 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:32,812 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:32,814 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:32,817 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:32,872 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:32,872 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-01-20 22:14:32,872 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-20 22:14:32,873 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-20 22:14:32,873 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2018-01-20 22:14:32,873 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 19 states. [2018-01-20 22:14:32,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:32,903 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-01-20 22:14:32,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-20 22:14:32,904 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2018-01-20 22:14:32,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:32,904 INFO L225 Difference]: With dead ends: 42 [2018-01-20 22:14:32,904 INFO L226 Difference]: Without dead ends: 33 [2018-01-20 22:14:32,905 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=221, Unknown=0, NotChecked=0, Total=380 [2018-01-20 22:14:32,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-01-20 22:14:32,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-01-20 22:14:32,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-01-20 22:14:32,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-01-20 22:14:32,908 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-01-20 22:14:32,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:32,909 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-01-20 22:14:32,909 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-20 22:14:32,909 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-01-20 22:14:32,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-20 22:14:32,909 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:32,909 INFO L322 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:32,909 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:32,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1343107371, now seen corresponding path program 15 times [2018-01-20 22:14:32,910 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:32,910 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:32,910 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:32,910 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:32,910 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:32,917 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:33,094 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:33,094 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 [2018-01-20 22:14:33,105 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:14:33,113 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:33,115 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:33,116 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:33,117 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:33,118 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:33,119 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:33,120 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:33,121 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:33,122 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:33,123 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:33,124 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:33,171 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:33,172 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-01-20 22:14:33,172 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-20 22:14:33,172 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-20 22:14:33,173 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2018-01-20 22:14:33,173 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 20 states. [2018-01-20 22:14:33,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:33,212 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-01-20 22:14:33,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-20 22:14:33,212 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2018-01-20 22:14:33,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:33,213 INFO L225 Difference]: With dead ends: 43 [2018-01-20 22:14:33,213 INFO L226 Difference]: Without dead ends: 34 [2018-01-20 22:14:33,214 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=243, Unknown=0, NotChecked=0, Total=420 [2018-01-20 22:14:33,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-01-20 22:14:33,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-01-20 22:14:33,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-01-20 22:14:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-01-20 22:14:33,221 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-01-20 22:14:33,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:33,221 INFO L432 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-01-20 22:14:33,221 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-20 22:14:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-01-20 22:14:33,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-20 22:14:33,221 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:33,222 INFO L322 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:33,222 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:33,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1579647696, now seen corresponding path program 16 times [2018-01-20 22:14:33,222 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:33,222 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:33,223 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:33,223 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:33,223 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:33,231 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:33,519 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:33,519 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 [2018-01-20 22:14:33,526 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:14:33,539 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:33,541 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:33,589 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:33,589 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-01-20 22:14:33,590 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-20 22:14:33,590 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-20 22:14:33,590 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2018-01-20 22:14:33,590 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 21 states. [2018-01-20 22:14:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:33,671 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-01-20 22:14:33,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-20 22:14:33,671 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2018-01-20 22:14:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:33,672 INFO L225 Difference]: With dead ends: 44 [2018-01-20 22:14:33,672 INFO L226 Difference]: Without dead ends: 35 [2018-01-20 22:14:33,673 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=266, Unknown=0, NotChecked=0, Total=462 [2018-01-20 22:14:33,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-01-20 22:14:33,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-01-20 22:14:33,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-20 22:14:33,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-01-20 22:14:33,676 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-01-20 22:14:33,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:33,676 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-01-20 22:14:33,676 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-20 22:14:33,676 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-01-20 22:14:33,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-20 22:14:33,677 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:33,677 INFO L322 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:33,677 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:33,677 INFO L82 PathProgramCache]: Analyzing trace with hash 322463179, now seen corresponding path program 17 times [2018-01-20 22:14:33,677 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:33,677 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:33,678 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:33,678 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:33,678 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:33,684 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:34,070 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:34,070 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 [2018-01-20 22:14:34,078 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:14:34,084 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:34,085 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:34,087 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:34,088 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:34,090 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:34,091 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:34,093 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:34,094 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:34,096 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:34,102 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:34,103 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:34,106 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:34,148 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:34,148 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-01-20 22:14:34,148 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-20 22:14:34,148 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-20 22:14:34,149 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2018-01-20 22:14:34,149 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 22 states. [2018-01-20 22:14:34,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:34,213 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-01-20 22:14:34,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-20 22:14:34,213 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 34 [2018-01-20 22:14:34,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:34,214 INFO L225 Difference]: With dead ends: 45 [2018-01-20 22:14:34,214 INFO L226 Difference]: Without dead ends: 36 [2018-01-20 22:14:34,214 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=290, Unknown=0, NotChecked=0, Total=506 [2018-01-20 22:14:34,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-20 22:14:34,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-20 22:14:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-20 22:14:34,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-01-20 22:14:34,217 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-01-20 22:14:34,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:34,217 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-01-20 22:14:34,217 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-20 22:14:34,217 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-01-20 22:14:34,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-20 22:14:34,218 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:34,218 INFO L322 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:34,218 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:34,218 INFO L82 PathProgramCache]: Analyzing trace with hash 4448816, now seen corresponding path program 18 times [2018-01-20 22:14:34,218 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:34,218 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:34,219 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:34,219 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:34,219 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:34,228 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:34,408 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:34,408 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:34,408 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 [2018-01-20 22:14:34,413 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:14:34,420 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:34,421 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:34,422 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:34,423 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:34,425 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:34,426 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:34,427 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:34,428 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:34,429 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:34,431 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:34,431 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:34,434 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:34,488 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:34,488 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-01-20 22:14:34,488 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-01-20 22:14:34,489 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-01-20 22:14:34,489 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2018-01-20 22:14:34,489 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 23 states. [2018-01-20 22:14:34,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:34,521 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-01-20 22:14:34,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-20 22:14:34,521 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2018-01-20 22:14:34,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:34,522 INFO L225 Difference]: With dead ends: 46 [2018-01-20 22:14:34,522 INFO L226 Difference]: Without dead ends: 37 [2018-01-20 22:14:34,523 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=237, Invalid=315, Unknown=0, NotChecked=0, Total=552 [2018-01-20 22:14:34,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-20 22:14:34,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-20 22:14:34,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-20 22:14:34,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-01-20 22:14:34,527 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-01-20 22:14:34,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:34,527 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-01-20 22:14:34,528 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-01-20 22:14:34,528 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-01-20 22:14:34,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-20 22:14:34,528 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:34,529 INFO L322 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:34,529 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:34,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1264061845, now seen corresponding path program 19 times [2018-01-20 22:14:34,529 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:34,529 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:34,530 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:34,530 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:34,530 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:34,537 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:34,706 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:34,706 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:14:34,711 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:34,725 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:34,755 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:34,756 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-01-20 22:14:34,756 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-20 22:14:34,756 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-20 22:14:34,756 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2018-01-20 22:14:34,756 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 24 states. [2018-01-20 22:14:34,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:34,816 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-01-20 22:14:34,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-20 22:14:34,816 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 36 [2018-01-20 22:14:34,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:34,817 INFO L225 Difference]: With dead ends: 47 [2018-01-20 22:14:34,817 INFO L226 Difference]: Without dead ends: 38 [2018-01-20 22:14:34,817 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2018-01-20 22:14:34,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-01-20 22:14:34,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-01-20 22:14:34,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-20 22:14:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-01-20 22:14:34,820 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-01-20 22:14:34,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:34,820 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-01-20 22:14:34,820 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-20 22:14:34,820 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-01-20 22:14:34,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-20 22:14:34,821 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:34,821 INFO L322 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:34,821 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:34,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1933186672, now seen corresponding path program 20 times [2018-01-20 22:14:34,821 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:34,821 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:34,822 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:34,822 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:34,822 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:34,828 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:35,028 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:35,028 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 [2018-01-20 22:14:35,033 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:14:35,040 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:35,044 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:35,045 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:35,047 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:35,082 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:35,083 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-01-20 22:14:35,083 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-01-20 22:14:35,083 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-01-20 22:14:35,083 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2018-01-20 22:14:35,083 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 25 states. [2018-01-20 22:14:35,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:35,110 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-01-20 22:14:35,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-20 22:14:35,110 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 37 [2018-01-20 22:14:35,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:35,110 INFO L225 Difference]: With dead ends: 48 [2018-01-20 22:14:35,111 INFO L226 Difference]: Without dead ends: 39 [2018-01-20 22:14:35,111 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=282, Invalid=368, Unknown=0, NotChecked=0, Total=650 [2018-01-20 22:14:35,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-20 22:14:35,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-20 22:14:35,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-20 22:14:35,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-01-20 22:14:35,113 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-01-20 22:14:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:35,114 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-01-20 22:14:35,114 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-01-20 22:14:35,114 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-01-20 22:14:35,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-20 22:14:35,114 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:35,114 INFO L322 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:35,114 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:35,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1201219829, now seen corresponding path program 21 times [2018-01-20 22:14:35,115 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:35,115 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:35,116 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:35,116 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:35,116 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:35,122 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:35,307 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:35,307 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 [2018-01-20 22:14:35,315 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:14:35,322 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:35,324 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:35,325 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:35,326 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:35,327 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:35,328 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:35,329 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:35,330 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:35,331 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:35,332 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:35,333 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:35,334 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:35,334 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:35,336 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:35,377 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:35,377 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-01-20 22:14:35,377 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-20 22:14:35,378 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-20 22:14:35,378 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2018-01-20 22:14:35,378 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 26 states. [2018-01-20 22:14:35,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:35,424 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-01-20 22:14:35,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-20 22:14:35,424 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 38 [2018-01-20 22:14:35,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:35,425 INFO L225 Difference]: With dead ends: 49 [2018-01-20 22:14:35,425 INFO L226 Difference]: Without dead ends: 40 [2018-01-20 22:14:35,426 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=306, Invalid=396, Unknown=0, NotChecked=0, Total=702 [2018-01-20 22:14:35,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-20 22:14:35,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-01-20 22:14:35,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-20 22:14:35,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-01-20 22:14:35,430 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-01-20 22:14:35,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:35,430 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-01-20 22:14:35,430 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-20 22:14:35,430 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-01-20 22:14:35,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-20 22:14:35,431 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:35,431 INFO L322 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:35,431 INFO L371 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:35,431 INFO L82 PathProgramCache]: Analyzing trace with hash 14915824, now seen corresponding path program 22 times [2018-01-20 22:14:35,431 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:35,432 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:35,432 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:35,432 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:35,433 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:35,440 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:35,678 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:35,678 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 [2018-01-20 22:14:35,685 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:14:35,699 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:35,701 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:35,747 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:35,747 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-01-20 22:14:35,747 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-01-20 22:14:35,748 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-01-20 22:14:35,748 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2018-01-20 22:14:35,748 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 27 states. [2018-01-20 22:14:35,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:35,794 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-01-20 22:14:35,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-20 22:14:35,794 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 39 [2018-01-20 22:14:35,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:35,795 INFO L225 Difference]: With dead ends: 50 [2018-01-20 22:14:35,795 INFO L226 Difference]: Without dead ends: 41 [2018-01-20 22:14:35,796 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=331, Invalid=425, Unknown=0, NotChecked=0, Total=756 [2018-01-20 22:14:35,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-20 22:14:35,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-20 22:14:35,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-20 22:14:35,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-01-20 22:14:35,800 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-01-20 22:14:35,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:35,800 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-01-20 22:14:35,801 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-01-20 22:14:35,801 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-01-20 22:14:35,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-01-20 22:14:35,801 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:35,801 INFO L322 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:35,802 INFO L371 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:35,802 INFO L82 PathProgramCache]: Analyzing trace with hash -939584597, now seen corresponding path program 23 times [2018-01-20 22:14:35,802 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:35,802 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:35,803 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:35,803 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:35,803 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:35,810 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:36,155 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:36,155 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 [2018-01-20 22:14:36,161 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:14:36,166 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:36,167 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:36,169 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:36,170 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:36,171 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:36,172 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:36,173 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:36,174 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:36,175 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:36,176 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:36,177 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:36,178 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:36,183 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:36,185 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:36,187 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:36,234 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:36,234 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-01-20 22:14:36,235 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-20 22:14:36,235 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-20 22:14:36,235 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2018-01-20 22:14:36,235 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 28 states. [2018-01-20 22:14:36,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:36,278 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-01-20 22:14:36,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-20 22:14:36,279 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 40 [2018-01-20 22:14:36,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:36,279 INFO L225 Difference]: With dead ends: 51 [2018-01-20 22:14:36,279 INFO L226 Difference]: Without dead ends: 42 [2018-01-20 22:14:36,280 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=357, Invalid=455, Unknown=0, NotChecked=0, Total=812 [2018-01-20 22:14:36,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-01-20 22:14:36,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-01-20 22:14:36,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-20 22:14:36,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-01-20 22:14:36,283 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-01-20 22:14:36,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:36,284 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-01-20 22:14:36,284 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-20 22:14:36,284 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-01-20 22:14:36,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-20 22:14:36,284 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:36,284 INFO L322 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:36,285 INFO L371 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:36,285 INFO L82 PathProgramCache]: Analyzing trace with hash -464326576, now seen corresponding path program 24 times [2018-01-20 22:14:36,285 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:36,285 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:36,286 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:36,286 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:36,286 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:36,295 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:36,674 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:36,674 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 [2018-01-20 22:14:36,681 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:14:36,689 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:36,691 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:36,692 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:36,694 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:36,695 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:36,696 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:36,697 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:36,698 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:36,699 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:36,700 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:36,702 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:36,703 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:36,704 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:36,705 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:36,707 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:36,739 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:36,739 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-01-20 22:14:36,739 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-01-20 22:14:36,739 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-01-20 22:14:36,739 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2018-01-20 22:14:36,740 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 29 states. [2018-01-20 22:14:36,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:36,786 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-01-20 22:14:36,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-20 22:14:36,786 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 41 [2018-01-20 22:14:36,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:36,787 INFO L225 Difference]: With dead ends: 52 [2018-01-20 22:14:36,787 INFO L226 Difference]: Without dead ends: 43 [2018-01-20 22:14:36,787 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=384, Invalid=486, Unknown=0, NotChecked=0, Total=870 [2018-01-20 22:14:36,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-20 22:14:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-20 22:14:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-20 22:14:36,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-01-20 22:14:36,791 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-01-20 22:14:36,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:36,791 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-01-20 22:14:36,791 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-01-20 22:14:36,792 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-01-20 22:14:36,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-20 22:14:36,792 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:36,792 INFO L322 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:36,792 INFO L371 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:36,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1383770187, now seen corresponding path program 25 times [2018-01-20 22:14:36,793 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:36,793 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:36,793 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:36,794 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:36,794 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:36,802 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:37,063 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:37,063 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 [2018-01-20 22:14:37,067 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:37,081 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:37,115 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:37,115 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-01-20 22:14:37,115 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-20 22:14:37,116 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-20 22:14:37,116 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2018-01-20 22:14:37,116 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 30 states. [2018-01-20 22:14:37,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:37,150 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-01-20 22:14:37,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-20 22:14:37,150 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 42 [2018-01-20 22:14:37,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:37,151 INFO L225 Difference]: With dead ends: 53 [2018-01-20 22:14:37,151 INFO L226 Difference]: Without dead ends: 44 [2018-01-20 22:14:37,151 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=412, Invalid=518, Unknown=0, NotChecked=0, Total=930 [2018-01-20 22:14:37,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-01-20 22:14:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-01-20 22:14:37,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-20 22:14:37,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-01-20 22:14:37,153 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-01-20 22:14:37,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:37,154 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-01-20 22:14:37,154 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-20 22:14:37,154 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-01-20 22:14:37,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-01-20 22:14:37,154 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:37,154 INFO L322 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:37,154 INFO L371 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:37,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1454772304, now seen corresponding path program 26 times [2018-01-20 22:14:37,155 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:37,155 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:37,155 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:37,155 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:37,155 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:37,163 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:37,420 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:37,421 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 [2018-01-20 22:14:37,425 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:14:37,432 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:37,438 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:37,439 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:37,441 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:37,473 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:37,473 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-01-20 22:14:37,473 INFO L409 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-01-20 22:14:37,473 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-01-20 22:14:37,474 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2018-01-20 22:14:37,474 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 31 states. [2018-01-20 22:14:37,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:37,519 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-01-20 22:14:37,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-20 22:14:37,519 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 43 [2018-01-20 22:14:37,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:37,520 INFO L225 Difference]: With dead ends: 54 [2018-01-20 22:14:37,520 INFO L226 Difference]: Without dead ends: 45 [2018-01-20 22:14:37,520 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=441, Invalid=551, Unknown=0, NotChecked=0, Total=992 [2018-01-20 22:14:37,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-20 22:14:37,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-01-20 22:14:37,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-20 22:14:37,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-01-20 22:14:37,523 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-01-20 22:14:37,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:37,523 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-01-20 22:14:37,523 INFO L433 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-01-20 22:14:37,524 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-01-20 22:14:37,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-20 22:14:37,524 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:37,524 INFO L322 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:37,524 INFO L371 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:37,525 INFO L82 PathProgramCache]: Analyzing trace with hash 744723691, now seen corresponding path program 27 times [2018-01-20 22:14:37,525 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:37,525 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:37,525 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:37,525 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:37,525 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:37,535 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:37,873 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:37,873 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 [2018-01-20 22:14:37,878 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:14:37,885 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:37,886 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:37,887 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:37,888 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:37,889 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:37,890 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:37,891 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:37,892 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:37,893 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:37,894 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:37,895 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:37,897 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:37,898 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:37,899 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:37,900 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:37,900 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:37,902 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:37,942 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:37,942 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-01-20 22:14:37,942 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-20 22:14:37,942 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-20 22:14:37,943 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2018-01-20 22:14:37,943 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 32 states. [2018-01-20 22:14:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:38,017 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-01-20 22:14:38,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-20 22:14:38,018 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 44 [2018-01-20 22:14:38,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:38,018 INFO L225 Difference]: With dead ends: 55 [2018-01-20 22:14:38,018 INFO L226 Difference]: Without dead ends: 46 [2018-01-20 22:14:38,019 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=471, Invalid=585, Unknown=0, NotChecked=0, Total=1056 [2018-01-20 22:14:38,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-20 22:14:38,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-01-20 22:14:38,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-01-20 22:14:38,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-01-20 22:14:38,022 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-01-20 22:14:38,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:38,022 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-01-20 22:14:38,022 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-20 22:14:38,022 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-01-20 22:14:38,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-01-20 22:14:38,022 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:38,023 INFO L322 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:38,023 INFO L371 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:38,023 INFO L82 PathProgramCache]: Analyzing trace with hash 209622800, now seen corresponding path program 28 times [2018-01-20 22:14:38,023 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:38,023 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:38,024 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:38,024 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:38,024 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:38,031 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:38,327 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:38,327 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 [2018-01-20 22:14:38,336 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:14:38,353 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:38,355 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:38,390 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:38,390 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-01-20 22:14:38,391 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-01-20 22:14:38,391 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-01-20 22:14:38,391 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2018-01-20 22:14:38,391 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 33 states. [2018-01-20 22:14:38,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:38,450 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-01-20 22:14:38,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-01-20 22:14:38,450 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 45 [2018-01-20 22:14:38,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:38,450 INFO L225 Difference]: With dead ends: 56 [2018-01-20 22:14:38,450 INFO L226 Difference]: Without dead ends: 47 [2018-01-20 22:14:38,451 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=502, Invalid=620, Unknown=0, NotChecked=0, Total=1122 [2018-01-20 22:14:38,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-01-20 22:14:38,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-01-20 22:14:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-01-20 22:14:38,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-01-20 22:14:38,454 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-01-20 22:14:38,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:38,454 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-01-20 22:14:38,454 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-01-20 22:14:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-01-20 22:14:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-20 22:14:38,455 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:38,455 INFO L322 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:38,455 INFO L371 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:38,455 INFO L82 PathProgramCache]: Analyzing trace with hash 801364363, now seen corresponding path program 29 times [2018-01-20 22:14:38,455 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:38,455 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:38,456 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:38,456 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:38,456 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:38,462 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:38,772 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:38,772 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:14:38,778 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:14:38,783 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:38,783 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:38,784 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:38,785 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:38,786 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:38,787 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:38,788 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:38,789 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:38,790 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:38,791 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:38,792 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:38,792 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:38,793 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:38,794 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:38,795 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:38,799 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:38,800 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:38,802 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:38,837 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:38,837 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-01-20 22:14:38,837 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-20 22:14:38,837 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-20 22:14:38,838 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2018-01-20 22:14:38,838 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 34 states. [2018-01-20 22:14:38,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:38,898 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-01-20 22:14:38,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-01-20 22:14:38,899 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 46 [2018-01-20 22:14:38,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:38,899 INFO L225 Difference]: With dead ends: 57 [2018-01-20 22:14:38,899 INFO L226 Difference]: Without dead ends: 48 [2018-01-20 22:14:38,900 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=534, Invalid=656, Unknown=0, NotChecked=0, Total=1190 [2018-01-20 22:14:38,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-01-20 22:14:38,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-01-20 22:14:38,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-20 22:14:38,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-01-20 22:14:38,903 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-01-20 22:14:38,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:38,903 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-01-20 22:14:38,903 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-20 22:14:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-01-20 22:14:38,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-01-20 22:14:38,904 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:38,904 INFO L322 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:38,904 INFO L371 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:38,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1965483632, now seen corresponding path program 30 times [2018-01-20 22:14:38,904 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:38,904 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:38,905 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:38,905 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:38,905 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:38,913 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:39,286 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:39,286 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 [2018-01-20 22:14:39,290 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:14:39,297 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:39,299 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:39,300 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:39,301 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:39,302 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:39,303 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:39,304 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:39,305 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:39,306 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:39,307 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:39,308 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:39,309 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:39,310 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:39,311 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:39,313 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:39,314 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:39,314 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:39,316 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:39,349 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:39,349 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-01-20 22:14:39,349 INFO L409 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-01-20 22:14:39,349 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-01-20 22:14:39,350 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2018-01-20 22:14:39,350 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 35 states. [2018-01-20 22:14:39,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:39,402 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-01-20 22:14:39,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-20 22:14:39,402 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 47 [2018-01-20 22:14:39,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:39,403 INFO L225 Difference]: With dead ends: 58 [2018-01-20 22:14:39,403 INFO L226 Difference]: Without dead ends: 49 [2018-01-20 22:14:39,403 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=567, Invalid=693, Unknown=0, NotChecked=0, Total=1260 [2018-01-20 22:14:39,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-20 22:14:39,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-01-20 22:14:39,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-20 22:14:39,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-01-20 22:14:39,405 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-01-20 22:14:39,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:39,406 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-01-20 22:14:39,406 INFO L433 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-01-20 22:14:39,406 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-01-20 22:14:39,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-20 22:14:39,406 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:39,406 INFO L322 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:39,406 INFO L371 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:39,407 INFO L82 PathProgramCache]: Analyzing trace with hash -601524693, now seen corresponding path program 31 times [2018-01-20 22:14:39,407 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:39,407 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:39,407 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:39,407 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:39,408 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:39,414 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:39,781 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:39,781 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 [2018-01-20 22:14:39,786 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:39,802 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:39,836 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:39,836 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-01-20 22:14:39,836 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-20 22:14:39,836 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-20 22:14:39,837 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2018-01-20 22:14:39,837 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 36 states. [2018-01-20 22:14:39,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:39,885 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-01-20 22:14:39,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-01-20 22:14:39,885 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 48 [2018-01-20 22:14:39,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:39,886 INFO L225 Difference]: With dead ends: 59 [2018-01-20 22:14:39,886 INFO L226 Difference]: Without dead ends: 50 [2018-01-20 22:14:39,887 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=601, Invalid=731, Unknown=0, NotChecked=0, Total=1332 [2018-01-20 22:14:39,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-20 22:14:39,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-01-20 22:14:39,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-20 22:14:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-01-20 22:14:39,890 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-01-20 22:14:39,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:39,890 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-01-20 22:14:39,890 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-20 22:14:39,890 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-01-20 22:14:39,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-01-20 22:14:39,891 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:39,891 INFO L322 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:39,891 INFO L371 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:39,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1425595856, now seen corresponding path program 32 times [2018-01-20 22:14:39,891 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:39,891 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:39,892 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:39,892 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:39,892 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:39,900 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:40,242 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:40,242 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 [2018-01-20 22:14:40,247 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:14:40,253 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:40,260 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:40,261 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:40,263 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:40,294 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:40,294 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-01-20 22:14:40,295 INFO L409 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-01-20 22:14:40,295 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-01-20 22:14:40,295 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2018-01-20 22:14:40,295 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 37 states. [2018-01-20 22:14:40,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:40,342 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-01-20 22:14:40,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-01-20 22:14:40,342 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 49 [2018-01-20 22:14:40,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:40,343 INFO L225 Difference]: With dead ends: 60 [2018-01-20 22:14:40,343 INFO L226 Difference]: Without dead ends: 51 [2018-01-20 22:14:40,343 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=636, Invalid=770, Unknown=0, NotChecked=0, Total=1406 [2018-01-20 22:14:40,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-20 22:14:40,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-01-20 22:14:40,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-01-20 22:14:40,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-01-20 22:14:40,346 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-01-20 22:14:40,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:40,346 INFO L432 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-01-20 22:14:40,347 INFO L433 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-01-20 22:14:40,347 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-01-20 22:14:40,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-01-20 22:14:40,347 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:40,347 INFO L322 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:40,347 INFO L371 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:40,348 INFO L82 PathProgramCache]: Analyzing trace with hash -158176565, now seen corresponding path program 33 times [2018-01-20 22:14:40,348 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:40,348 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:40,348 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:40,348 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:40,348 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:40,354 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:40,732 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:40,732 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 [2018-01-20 22:14:40,736 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:14:40,743 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:40,745 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:40,746 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:40,747 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:40,748 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:40,749 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:40,750 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:40,751 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:40,752 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:40,753 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:40,754 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:40,755 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:40,756 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:40,757 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:40,758 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:40,760 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:40,761 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:40,762 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:40,762 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:40,764 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:40,800 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:40,801 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-01-20 22:14:40,801 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-01-20 22:14:40,801 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-01-20 22:14:40,801 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2018-01-20 22:14:40,801 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 38 states. [2018-01-20 22:14:40,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:40,856 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-01-20 22:14:40,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-01-20 22:14:40,857 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 50 [2018-01-20 22:14:40,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:40,857 INFO L225 Difference]: With dead ends: 61 [2018-01-20 22:14:40,857 INFO L226 Difference]: Without dead ends: 52 [2018-01-20 22:14:40,858 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=672, Invalid=810, Unknown=0, NotChecked=0, Total=1482 [2018-01-20 22:14:40,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-01-20 22:14:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-01-20 22:14:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-20 22:14:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-01-20 22:14:40,861 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-01-20 22:14:40,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:40,861 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-01-20 22:14:40,861 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-01-20 22:14:40,861 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-01-20 22:14:40,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-01-20 22:14:40,861 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:40,861 INFO L322 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:40,861 INFO L371 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:40,861 INFO L82 PathProgramCache]: Analyzing trace with hash -2010481360, now seen corresponding path program 34 times [2018-01-20 22:14:40,862 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:40,862 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:40,862 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:40,862 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:40,862 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:40,869 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:41,503 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:41,503 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 [2018-01-20 22:14:41,512 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:14:41,532 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:41,534 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:41,577 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:41,577 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-01-20 22:14:41,577 INFO L409 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-01-20 22:14:41,577 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-01-20 22:14:41,578 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2018-01-20 22:14:41,578 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 39 states. [2018-01-20 22:14:41,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:41,645 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-01-20 22:14:41,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-01-20 22:14:41,645 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 51 [2018-01-20 22:14:41,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:41,646 INFO L225 Difference]: With dead ends: 62 [2018-01-20 22:14:41,646 INFO L226 Difference]: Without dead ends: 53 [2018-01-20 22:14:41,646 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=709, Invalid=851, Unknown=0, NotChecked=0, Total=1560 [2018-01-20 22:14:41,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-01-20 22:14:41,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-01-20 22:14:41,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-20 22:14:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-01-20 22:14:41,649 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-01-20 22:14:41,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:41,649 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-01-20 22:14:41,649 INFO L433 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-01-20 22:14:41,649 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-01-20 22:14:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-20 22:14:41,650 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:41,650 INFO L322 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:41,650 INFO L371 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:41,650 INFO L82 PathProgramCache]: Analyzing trace with hash 697612139, now seen corresponding path program 35 times [2018-01-20 22:14:41,650 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:41,650 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:41,651 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:41,651 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:41,651 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:41,658 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:42,057 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:42,057 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 [2018-01-20 22:14:42,062 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:14:42,066 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:42,067 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:42,068 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:42,069 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:42,069 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:42,070 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:42,071 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:42,072 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:42,073 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:42,074 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:42,075 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:42,076 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:42,076 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:42,077 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:42,078 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:42,079 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:42,080 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:42,082 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:42,086 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:42,088 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:42,090 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:42,128 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:42,128 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-01-20 22:14:42,129 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-20 22:14:42,129 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-20 22:14:42,129 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2018-01-20 22:14:42,129 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 40 states. [2018-01-20 22:14:42,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:42,188 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-01-20 22:14:42,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-01-20 22:14:42,189 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 52 [2018-01-20 22:14:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:42,189 INFO L225 Difference]: With dead ends: 63 [2018-01-20 22:14:42,189 INFO L226 Difference]: Without dead ends: 54 [2018-01-20 22:14:42,190 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=747, Invalid=893, Unknown=0, NotChecked=0, Total=1640 [2018-01-20 22:14:42,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-20 22:14:42,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-01-20 22:14:42,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-20 22:14:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-01-20 22:14:42,192 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-01-20 22:14:42,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:42,193 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-01-20 22:14:42,193 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-20 22:14:42,193 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-01-20 22:14:42,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-01-20 22:14:42,193 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:42,193 INFO L322 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:42,193 INFO L371 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:42,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1250835312, now seen corresponding path program 36 times [2018-01-20 22:14:42,194 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:42,194 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:42,194 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:42,194 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:42,194 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:42,202 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:42,839 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:42,840 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 [2018-01-20 22:14:42,849 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:14:42,858 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:42,861 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:42,862 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:42,864 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:42,865 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:42,867 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:42,869 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:42,870 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:42,872 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:42,873 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:42,875 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:42,877 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:42,878 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:42,880 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:42,882 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:42,883 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:42,885 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:42,887 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:42,889 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:42,890 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:42,892 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:42,954 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:42,954 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-01-20 22:14:42,954 INFO L409 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-01-20 22:14:42,955 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-01-20 22:14:42,955 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2018-01-20 22:14:42,955 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 41 states. [2018-01-20 22:14:43,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:43,015 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-01-20 22:14:43,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-01-20 22:14:43,015 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 53 [2018-01-20 22:14:43,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:43,016 INFO L225 Difference]: With dead ends: 64 [2018-01-20 22:14:43,016 INFO L226 Difference]: Without dead ends: 55 [2018-01-20 22:14:43,017 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=786, Invalid=936, Unknown=0, NotChecked=0, Total=1722 [2018-01-20 22:14:43,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-20 22:14:43,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-01-20 22:14:43,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-20 22:14:43,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-01-20 22:14:43,020 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-01-20 22:14:43,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:43,020 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-01-20 22:14:43,020 INFO L433 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-01-20 22:14:43,021 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-01-20 22:14:43,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-01-20 22:14:43,021 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:43,021 INFO L322 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:43,021 INFO L371 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:43,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1523164149, now seen corresponding path program 37 times [2018-01-20 22:14:43,022 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:43,022 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:43,022 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:43,022 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:43,023 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:43,032 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:43,568 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:43,568 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 [2018-01-20 22:14:43,573 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:43,589 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:43,601 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:43,621 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:43,621 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-01-20 22:14:43,622 INFO L409 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-01-20 22:14:43,622 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-01-20 22:14:43,622 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2018-01-20 22:14:43,622 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 42 states. [2018-01-20 22:14:43,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:43,663 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-01-20 22:14:43,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-01-20 22:14:43,664 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 54 [2018-01-20 22:14:43,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:43,664 INFO L225 Difference]: With dead ends: 65 [2018-01-20 22:14:43,664 INFO L226 Difference]: Without dead ends: 56 [2018-01-20 22:14:43,665 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=826, Invalid=980, Unknown=0, NotChecked=0, Total=1806 [2018-01-20 22:14:43,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-20 22:14:43,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-01-20 22:14:43,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-20 22:14:43,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-01-20 22:14:43,668 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-01-20 22:14:43,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:43,668 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-01-20 22:14:43,668 INFO L433 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-01-20 22:14:43,668 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-01-20 22:14:43,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-01-20 22:14:43,669 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:43,669 INFO L322 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:43,669 INFO L371 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:43,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1375423504, now seen corresponding path program 38 times [2018-01-20 22:14:43,669 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:43,669 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:43,670 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:43,670 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:43,670 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:43,680 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:44,207 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:44,208 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:44,208 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 [2018-01-20 22:14:44,213 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:14:44,222 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:44,239 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:44,241 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:44,244 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:44,278 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:44,278 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-01-20 22:14:44,278 INFO L409 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-01-20 22:14:44,278 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-01-20 22:14:44,279 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2018-01-20 22:14:44,279 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 43 states. [2018-01-20 22:14:44,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:44,345 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-01-20 22:14:44,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-01-20 22:14:44,345 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 55 [2018-01-20 22:14:44,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:44,346 INFO L225 Difference]: With dead ends: 66 [2018-01-20 22:14:44,346 INFO L226 Difference]: Without dead ends: 57 [2018-01-20 22:14:44,346 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=867, Invalid=1025, Unknown=0, NotChecked=0, Total=1892 [2018-01-20 22:14:44,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-20 22:14:44,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-01-20 22:14:44,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-20 22:14:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-01-20 22:14:44,349 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-01-20 22:14:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:44,349 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-01-20 22:14:44,349 INFO L433 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-01-20 22:14:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-01-20 22:14:44,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-20 22:14:44,349 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:44,350 INFO L322 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:44,350 INFO L371 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:44,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1090430805, now seen corresponding path program 39 times [2018-01-20 22:14:44,350 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:44,350 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:44,350 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:44,350 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:44,351 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:44,357 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:44,875 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:44,875 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 [2018-01-20 22:14:44,880 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:14:44,887 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,889 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,890 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,891 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,892 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,893 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,894 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,895 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,896 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,897 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,898 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,899 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,900 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,901 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,903 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,904 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,905 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,906 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,908 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,909 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,910 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:44,910 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:44,912 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:44,948 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:44,948 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-01-20 22:14:44,948 INFO L409 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-01-20 22:14:44,949 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-01-20 22:14:44,949 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2018-01-20 22:14:44,949 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 44 states. [2018-01-20 22:14:44,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:44,997 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-01-20 22:14:44,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-01-20 22:14:44,997 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 56 [2018-01-20 22:14:44,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:44,998 INFO L225 Difference]: With dead ends: 67 [2018-01-20 22:14:44,998 INFO L226 Difference]: Without dead ends: 58 [2018-01-20 22:14:44,998 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=909, Invalid=1071, Unknown=0, NotChecked=0, Total=1980 [2018-01-20 22:14:44,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-01-20 22:14:45,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-01-20 22:14:45,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-20 22:14:45,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-01-20 22:14:45,001 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-01-20 22:14:45,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:45,001 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-01-20 22:14:45,001 INFO L433 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-01-20 22:14:45,001 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-01-20 22:14:45,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-01-20 22:14:45,001 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:45,001 INFO L322 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:45,002 INFO L371 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:45,002 INFO L82 PathProgramCache]: Analyzing trace with hash -845591728, now seen corresponding path program 40 times [2018-01-20 22:14:45,002 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:45,002 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:45,002 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:45,002 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:45,002 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:45,011 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:45,505 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:45,505 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 [2018-01-20 22:14:45,510 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:14:45,527 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:45,529 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:45,569 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:45,569 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-01-20 22:14:45,570 INFO L409 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-01-20 22:14:45,570 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-01-20 22:14:45,570 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2018-01-20 22:14:45,570 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 45 states. [2018-01-20 22:14:45,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:45,627 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-01-20 22:14:45,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-01-20 22:14:45,627 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 57 [2018-01-20 22:14:45,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:45,628 INFO L225 Difference]: With dead ends: 68 [2018-01-20 22:14:45,628 INFO L226 Difference]: Without dead ends: 59 [2018-01-20 22:14:45,629 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=952, Invalid=1118, Unknown=0, NotChecked=0, Total=2070 [2018-01-20 22:14:45,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-20 22:14:45,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-01-20 22:14:45,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-01-20 22:14:45,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-01-20 22:14:45,631 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-01-20 22:14:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:45,631 INFO L432 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-01-20 22:14:45,631 INFO L433 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-01-20 22:14:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-01-20 22:14:45,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-01-20 22:14:45,632 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:45,632 INFO L322 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:45,632 INFO L371 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:45,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1845514933, now seen corresponding path program 41 times [2018-01-20 22:14:45,632 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:45,632 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:45,633 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:45,633 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:45,633 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:45,641 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:46,179 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:46,179 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 [2018-01-20 22:14:46,184 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:14:46,188 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,189 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,190 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,190 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,191 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,192 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,193 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,193 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,194 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,195 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,196 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,197 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,198 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,199 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,200 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,201 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,202 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,203 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,204 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,205 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,206 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,209 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:46,211 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:46,213 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:46,256 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:46,256 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-01-20 22:14:46,257 INFO L409 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-01-20 22:14:46,257 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-01-20 22:14:46,257 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2018-01-20 22:14:46,257 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 46 states. [2018-01-20 22:14:46,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:46,328 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-01-20 22:14:46,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-01-20 22:14:46,328 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 58 [2018-01-20 22:14:46,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:46,328 INFO L225 Difference]: With dead ends: 69 [2018-01-20 22:14:46,328 INFO L226 Difference]: Without dead ends: 60 [2018-01-20 22:14:46,329 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=996, Invalid=1166, Unknown=0, NotChecked=0, Total=2162 [2018-01-20 22:14:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-20 22:14:46,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-01-20 22:14:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-20 22:14:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-01-20 22:14:46,331 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-01-20 22:14:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:46,331 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-01-20 22:14:46,331 INFO L433 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-01-20 22:14:46,332 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-01-20 22:14:46,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-01-20 22:14:46,332 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:46,332 INFO L322 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:46,332 INFO L371 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:46,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1516604080, now seen corresponding path program 42 times [2018-01-20 22:14:46,332 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:46,332 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:46,333 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:46,333 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:46,333 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:46,342 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:46,952 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:46,952 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 [2018-01-20 22:14:46,957 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:14:46,964 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,966 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,967 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,968 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,969 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,970 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,971 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,973 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,974 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,975 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,976 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,977 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,978 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,980 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,981 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,982 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,983 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,985 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,986 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,987 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,989 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,990 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:46,991 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:46,993 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:47,028 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:47,029 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-01-20 22:14:47,029 INFO L409 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-01-20 22:14:47,029 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-01-20 22:14:47,030 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2018-01-20 22:14:47,030 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 47 states. [2018-01-20 22:14:47,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:47,101 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-01-20 22:14:47,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-01-20 22:14:47,101 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 59 [2018-01-20 22:14:47,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:47,102 INFO L225 Difference]: With dead ends: 70 [2018-01-20 22:14:47,102 INFO L226 Difference]: Without dead ends: 61 [2018-01-20 22:14:47,102 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1041, Invalid=1215, Unknown=0, NotChecked=0, Total=2256 [2018-01-20 22:14:47,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-20 22:14:47,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-01-20 22:14:47,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-01-20 22:14:47,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-01-20 22:14:47,105 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-01-20 22:14:47,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:47,105 INFO L432 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-01-20 22:14:47,105 INFO L433 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-01-20 22:14:47,105 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-01-20 22:14:47,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-01-20 22:14:47,106 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:47,106 INFO L322 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:47,106 INFO L371 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:47,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1631888917, now seen corresponding path program 43 times [2018-01-20 22:14:47,106 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:47,106 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:47,106 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:47,107 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:47,107 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:47,117 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:47,787 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:47,787 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 [2018-01-20 22:14:47,791 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:47,812 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:47,845 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:47,845 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-01-20 22:14:47,845 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-01-20 22:14:47,846 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-01-20 22:14:47,846 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2018-01-20 22:14:47,846 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 48 states. [2018-01-20 22:14:47,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:47,907 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-01-20 22:14:47,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-01-20 22:14:47,908 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 60 [2018-01-20 22:14:47,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:47,908 INFO L225 Difference]: With dead ends: 71 [2018-01-20 22:14:47,908 INFO L226 Difference]: Without dead ends: 62 [2018-01-20 22:14:47,908 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1087, Invalid=1265, Unknown=0, NotChecked=0, Total=2352 [2018-01-20 22:14:47,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-01-20 22:14:47,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-01-20 22:14:47,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-01-20 22:14:47,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-01-20 22:14:47,912 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-01-20 22:14:47,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:47,912 INFO L432 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-01-20 22:14:47,912 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-01-20 22:14:47,912 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-01-20 22:14:47,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-01-20 22:14:47,912 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:47,913 INFO L322 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:47,913 INFO L371 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:47,913 INFO L82 PathProgramCache]: Analyzing trace with hash -450924016, now seen corresponding path program 44 times [2018-01-20 22:14:47,913 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:47,913 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:47,913 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:47,913 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:47,914 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:47,920 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:48,503 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:48,503 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 [2018-01-20 22:14:48,508 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:14:48,516 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:48,525 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:48,527 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:48,529 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:48,567 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:48,567 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2018-01-20 22:14:48,567 INFO L409 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-01-20 22:14:48,568 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-01-20 22:14:48,568 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2018-01-20 22:14:48,568 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 49 states. [2018-01-20 22:14:48,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:48,626 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-01-20 22:14:48,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-01-20 22:14:48,627 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 61 [2018-01-20 22:14:48,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:48,627 INFO L225 Difference]: With dead ends: 72 [2018-01-20 22:14:48,627 INFO L226 Difference]: Without dead ends: 63 [2018-01-20 22:14:48,627 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1316, Unknown=0, NotChecked=0, Total=2450 [2018-01-20 22:14:48,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-01-20 22:14:48,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-01-20 22:14:48,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-01-20 22:14:48,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-01-20 22:14:48,630 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-01-20 22:14:48,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:48,630 INFO L432 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-01-20 22:14:48,630 INFO L433 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-01-20 22:14:48,630 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-01-20 22:14:48,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-01-20 22:14:48,631 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:48,631 INFO L322 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:48,631 INFO L371 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:48,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1799249547, now seen corresponding path program 45 times [2018-01-20 22:14:48,631 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:48,631 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:48,631 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:48,632 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:48,632 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:48,638 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:49,297 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:49,297 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 [2018-01-20 22:14:49,302 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:14:49,309 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,311 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,312 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,313 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,314 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,315 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,316 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,317 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,318 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,319 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,320 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,321 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,322 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,323 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,325 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,326 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,327 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,328 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,329 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,331 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,332 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,333 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,335 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,336 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:49,336 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:49,339 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:49,375 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:49,375 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-01-20 22:14:49,375 INFO L409 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-01-20 22:14:49,375 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-01-20 22:14:49,376 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2018-01-20 22:14:49,376 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 50 states. [2018-01-20 22:14:49,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:49,433 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-01-20 22:14:49,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-01-20 22:14:49,433 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 62 [2018-01-20 22:14:49,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:49,434 INFO L225 Difference]: With dead ends: 73 [2018-01-20 22:14:49,434 INFO L226 Difference]: Without dead ends: 64 [2018-01-20 22:14:49,434 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1182, Invalid=1368, Unknown=0, NotChecked=0, Total=2550 [2018-01-20 22:14:49,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-01-20 22:14:49,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-01-20 22:14:49,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-01-20 22:14:49,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-01-20 22:14:49,438 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-01-20 22:14:49,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:49,439 INFO L432 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-01-20 22:14:49,439 INFO L433 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-01-20 22:14:49,439 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-01-20 22:14:49,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-01-20 22:14:49,439 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:49,440 INFO L322 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:49,440 INFO L371 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:49,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1459814032, now seen corresponding path program 46 times [2018-01-20 22:14:49,440 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:49,440 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:49,441 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:49,441 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:49,441 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:49,450 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:50,111 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:50,111 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 [2018-01-20 22:14:50,115 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:14:50,135 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:50,138 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:50,172 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:50,172 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2018-01-20 22:14:50,172 INFO L409 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-01-20 22:14:50,173 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-01-20 22:14:50,173 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2018-01-20 22:14:50,173 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 51 states. [2018-01-20 22:14:50,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:50,253 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-01-20 22:14:50,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-01-20 22:14:50,254 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 63 [2018-01-20 22:14:50,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:50,255 INFO L225 Difference]: With dead ends: 74 [2018-01-20 22:14:50,255 INFO L226 Difference]: Without dead ends: 65 [2018-01-20 22:14:50,255 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1231, Invalid=1421, Unknown=0, NotChecked=0, Total=2652 [2018-01-20 22:14:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-01-20 22:14:50,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-01-20 22:14:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-01-20 22:14:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-01-20 22:14:50,258 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-01-20 22:14:50,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:50,258 INFO L432 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-01-20 22:14:50,258 INFO L433 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-01-20 22:14:50,258 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-01-20 22:14:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-01-20 22:14:50,258 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:50,258 INFO L322 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:50,258 INFO L371 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:50,259 INFO L82 PathProgramCache]: Analyzing trace with hash 588430123, now seen corresponding path program 47 times [2018-01-20 22:14:50,259 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:50,259 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:50,259 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:50,259 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:50,259 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:50,271 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:50,981 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:50,981 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 [2018-01-20 22:14:50,985 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:14:50,989 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:50,990 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:50,991 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:50,992 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:50,992 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:50,993 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:50,994 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:50,995 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:50,995 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:50,996 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:50,997 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:50,998 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:50,999 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:51,000 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:51,001 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:51,002 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:51,003 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:51,004 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:51,005 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:51,006 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:51,007 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:51,008 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:51,009 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:51,010 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:51,015 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:51,017 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:51,020 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:51,054 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:51,054 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-01-20 22:14:51,054 INFO L409 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-01-20 22:14:51,054 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-01-20 22:14:51,055 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2018-01-20 22:14:51,055 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 52 states. [2018-01-20 22:14:51,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:51,115 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-01-20 22:14:51,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-01-20 22:14:51,115 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 64 [2018-01-20 22:14:51,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:51,116 INFO L225 Difference]: With dead ends: 75 [2018-01-20 22:14:51,116 INFO L226 Difference]: Without dead ends: 66 [2018-01-20 22:14:51,116 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1281, Invalid=1475, Unknown=0, NotChecked=0, Total=2756 [2018-01-20 22:14:51,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-01-20 22:14:51,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-01-20 22:14:51,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-20 22:14:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-01-20 22:14:51,119 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-01-20 22:14:51,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:51,119 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-01-20 22:14:51,119 INFO L433 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-01-20 22:14:51,119 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-01-20 22:14:51,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-01-20 22:14:51,119 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:51,119 INFO L322 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:51,119 INFO L371 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:51,120 INFO L82 PathProgramCache]: Analyzing trace with hash -340510512, now seen corresponding path program 48 times [2018-01-20 22:14:51,120 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:51,120 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:51,120 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:51,120 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:51,120 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:51,127 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:51,829 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:51,829 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 [2018-01-20 22:14:51,834 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:14:51,840 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,842 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,843 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,844 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,845 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,846 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,847 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,848 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,849 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,850 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,851 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,852 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,853 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,854 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,855 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,857 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,858 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,859 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,860 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,861 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,863 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,864 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,865 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,867 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,868 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:51,869 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:51,871 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:51,914 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:51,914 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2018-01-20 22:14:51,914 INFO L409 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-01-20 22:14:51,915 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-01-20 22:14:51,915 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2018-01-20 22:14:51,915 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 53 states. [2018-01-20 22:14:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:51,973 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-01-20 22:14:51,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-01-20 22:14:51,973 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 65 [2018-01-20 22:14:51,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:51,973 INFO L225 Difference]: With dead ends: 76 [2018-01-20 22:14:51,974 INFO L226 Difference]: Without dead ends: 67 [2018-01-20 22:14:51,974 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1332, Invalid=1530, Unknown=0, NotChecked=0, Total=2862 [2018-01-20 22:14:51,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-01-20 22:14:51,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-01-20 22:14:51,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-01-20 22:14:51,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-01-20 22:14:51,978 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-01-20 22:14:51,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:51,978 INFO L432 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-01-20 22:14:51,978 INFO L433 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-01-20 22:14:51,978 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-01-20 22:14:51,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-01-20 22:14:51,979 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:51,979 INFO L322 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:51,979 INFO L371 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:51,979 INFO L82 PathProgramCache]: Analyzing trace with hash 927100875, now seen corresponding path program 49 times [2018-01-20 22:14:51,979 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:51,980 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:51,980 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:51,980 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:51,980 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:51,989 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:52,714 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:52,714 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 [2018-01-20 22:14:52,718 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:52,745 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:52,820 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:52,820 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-01-20 22:14:52,820 INFO L409 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-01-20 22:14:52,821 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-01-20 22:14:52,821 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2018-01-20 22:14:52,821 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 54 states. [2018-01-20 22:14:52,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:52,902 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-01-20 22:14:52,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-01-20 22:14:52,902 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 66 [2018-01-20 22:14:52,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:52,903 INFO L225 Difference]: With dead ends: 77 [2018-01-20 22:14:52,903 INFO L226 Difference]: Without dead ends: 68 [2018-01-20 22:14:52,903 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1384, Invalid=1586, Unknown=0, NotChecked=0, Total=2970 [2018-01-20 22:14:52,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-01-20 22:14:52,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-01-20 22:14:52,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-01-20 22:14:52,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-01-20 22:14:52,907 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-01-20 22:14:52,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:52,908 INFO L432 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-01-20 22:14:52,908 INFO L433 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-01-20 22:14:52,908 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-01-20 22:14:52,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-01-20 22:14:52,908 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:52,909 INFO L322 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:52,909 INFO L371 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:52,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1568348208, now seen corresponding path program 50 times [2018-01-20 22:14:52,909 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:52,909 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:52,910 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:52,910 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:52,910 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:52,920 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:53,831 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:53,831 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 [2018-01-20 22:14:53,838 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:14:53,846 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:53,854 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:53,857 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:53,860 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:53,896 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:53,896 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2018-01-20 22:14:53,896 INFO L409 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-01-20 22:14:53,897 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-01-20 22:14:53,897 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2018-01-20 22:14:53,897 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 55 states. [2018-01-20 22:14:53,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:53,961 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-01-20 22:14:53,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-01-20 22:14:53,961 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 67 [2018-01-20 22:14:53,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:53,962 INFO L225 Difference]: With dead ends: 78 [2018-01-20 22:14:53,962 INFO L226 Difference]: Without dead ends: 69 [2018-01-20 22:14:53,962 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1437, Invalid=1643, Unknown=0, NotChecked=0, Total=3080 [2018-01-20 22:14:53,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-20 22:14:53,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-01-20 22:14:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-01-20 22:14:53,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-01-20 22:14:53,966 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-01-20 22:14:53,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:53,967 INFO L432 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-01-20 22:14:53,967 INFO L433 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-01-20 22:14:53,967 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-01-20 22:14:53,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-01-20 22:14:53,968 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:53,968 INFO L322 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:53,968 INFO L371 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:53,968 INFO L82 PathProgramCache]: Analyzing trace with hash -27820949, now seen corresponding path program 51 times [2018-01-20 22:14:53,968 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:53,968 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:53,969 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:53,969 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:53,969 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:53,982 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:54,781 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:54,781 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 [2018-01-20 22:14:54,786 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:14:54,793 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,795 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,796 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,797 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,798 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,799 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,800 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,801 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,802 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,803 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,804 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,805 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,806 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,807 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,809 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,810 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,811 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,812 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,813 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,815 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,816 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,817 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,819 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,820 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,821 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,823 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,824 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:54,824 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:54,827 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:54,865 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:54,866 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-01-20 22:14:54,866 INFO L409 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-01-20 22:14:54,866 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-01-20 22:14:54,867 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2018-01-20 22:14:54,867 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 56 states. [2018-01-20 22:14:54,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:54,943 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-01-20 22:14:54,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-01-20 22:14:54,943 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 68 [2018-01-20 22:14:54,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:54,944 INFO L225 Difference]: With dead ends: 79 [2018-01-20 22:14:54,944 INFO L226 Difference]: Without dead ends: 70 [2018-01-20 22:14:54,944 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1491, Invalid=1701, Unknown=0, NotChecked=0, Total=3192 [2018-01-20 22:14:54,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-01-20 22:14:54,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-01-20 22:14:54,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-01-20 22:14:54,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-01-20 22:14:54,947 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-01-20 22:14:54,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:54,948 INFO L432 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-01-20 22:14:54,948 INFO L433 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-01-20 22:14:54,948 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-01-20 22:14:54,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-01-20 22:14:54,948 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:54,948 INFO L322 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:54,948 INFO L371 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:54,948 INFO L82 PathProgramCache]: Analyzing trace with hash 2030542736, now seen corresponding path program 52 times [2018-01-20 22:14:54,948 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:54,948 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:54,949 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:54,949 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:54,949 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:54,957 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:55,794 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:55,794 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 [2018-01-20 22:14:55,799 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:14:55,821 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:55,824 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:55,864 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:55,865 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2018-01-20 22:14:55,865 INFO L409 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-01-20 22:14:55,866 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-01-20 22:14:55,866 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2018-01-20 22:14:55,866 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 57 states. [2018-01-20 22:14:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:55,933 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-01-20 22:14:55,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-01-20 22:14:55,933 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 69 [2018-01-20 22:14:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:55,934 INFO L225 Difference]: With dead ends: 80 [2018-01-20 22:14:55,934 INFO L226 Difference]: Without dead ends: 71 [2018-01-20 22:14:55,934 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1546, Invalid=1760, Unknown=0, NotChecked=0, Total=3306 [2018-01-20 22:14:55,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-01-20 22:14:55,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-01-20 22:14:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-01-20 22:14:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-01-20 22:14:55,937 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-01-20 22:14:55,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:55,937 INFO L432 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-01-20 22:14:55,937 INFO L433 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-01-20 22:14:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-01-20 22:14:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-01-20 22:14:55,937 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:55,937 INFO L322 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:55,937 INFO L371 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:55,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1415307531, now seen corresponding path program 53 times [2018-01-20 22:14:55,938 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:55,938 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:55,938 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:55,938 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:55,938 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:55,946 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:56,774 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:56,774 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:14:56,779 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:14:56,784 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,785 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,786 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,787 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,788 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,789 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,794 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,795 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,797 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,798 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,799 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,801 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,802 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,803 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,804 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,806 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,807 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,809 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,810 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,812 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,814 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,815 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,817 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,818 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,820 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,822 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,824 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,829 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:56,831 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:56,835 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:56,875 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:56,875 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-01-20 22:14:56,876 INFO L409 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-01-20 22:14:56,876 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-01-20 22:14:56,876 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2018-01-20 22:14:56,876 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 58 states. [2018-01-20 22:14:56,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:56,949 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-01-20 22:14:56,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-01-20 22:14:56,949 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 70 [2018-01-20 22:14:56,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:56,950 INFO L225 Difference]: With dead ends: 81 [2018-01-20 22:14:56,950 INFO L226 Difference]: Without dead ends: 72 [2018-01-20 22:14:56,950 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1602, Invalid=1820, Unknown=0, NotChecked=0, Total=3422 [2018-01-20 22:14:56,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-01-20 22:14:56,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-01-20 22:14:56,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-01-20 22:14:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-01-20 22:14:56,953 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-01-20 22:14:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:56,954 INFO L432 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-01-20 22:14:56,954 INFO L433 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-01-20 22:14:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-01-20 22:14:56,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-01-20 22:14:56,955 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:56,955 INFO L322 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:56,955 INFO L371 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:56,955 INFO L82 PathProgramCache]: Analyzing trace with hash -477114640, now seen corresponding path program 54 times [2018-01-20 22:14:56,955 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:56,955 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:56,956 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:56,956 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:56,956 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:56,969 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:58,039 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:58,039 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:14:58,044 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:14:58,051 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,053 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,054 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,055 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,056 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,057 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,058 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,059 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,060 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,061 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,062 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,063 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,064 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,065 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,067 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,068 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,069 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,070 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,071 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,072 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,074 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,075 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,076 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,078 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,079 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,080 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,082 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,083 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:58,084 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:58,086 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:58,121 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:58,121 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2018-01-20 22:14:58,121 INFO L409 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-01-20 22:14:58,121 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-01-20 22:14:58,122 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2018-01-20 22:14:58,122 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 59 states. [2018-01-20 22:14:58,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:58,234 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-01-20 22:14:58,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-01-20 22:14:58,234 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 71 [2018-01-20 22:14:58,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:58,235 INFO L225 Difference]: With dead ends: 82 [2018-01-20 22:14:58,235 INFO L226 Difference]: Without dead ends: 73 [2018-01-20 22:14:58,235 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1659, Invalid=1881, Unknown=0, NotChecked=0, Total=3540 [2018-01-20 22:14:58,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-20 22:14:58,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-01-20 22:14:58,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-01-20 22:14:58,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-01-20 22:14:58,238 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-01-20 22:14:58,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:58,238 INFO L432 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-01-20 22:14:58,238 INFO L433 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-01-20 22:14:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-01-20 22:14:58,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-01-20 22:14:58,238 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:58,238 INFO L322 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:58,238 INFO L371 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:58,239 INFO L82 PathProgramCache]: Analyzing trace with hash 987340203, now seen corresponding path program 55 times [2018-01-20 22:14:58,239 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:58,239 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:58,239 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:58,239 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:58,239 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:58,248 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:59,440 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:59,441 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:14:59,446 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:59,466 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:59,500 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:59,500 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-01-20 22:14:59,500 INFO L409 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-01-20 22:14:59,500 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-01-20 22:14:59,501 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2018-01-20 22:14:59,501 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 60 states. [2018-01-20 22:14:59,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:59,569 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-01-20 22:14:59,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-01-20 22:14:59,569 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 72 [2018-01-20 22:14:59,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:59,570 INFO L225 Difference]: With dead ends: 83 [2018-01-20 22:14:59,570 INFO L226 Difference]: Without dead ends: 74 [2018-01-20 22:14:59,570 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1717, Invalid=1943, Unknown=0, NotChecked=0, Total=3660 [2018-01-20 22:14:59,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-01-20 22:14:59,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-01-20 22:14:59,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-01-20 22:14:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-01-20 22:14:59,572 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-01-20 22:14:59,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:59,572 INFO L432 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-01-20 22:14:59,572 INFO L433 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-01-20 22:14:59,572 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-01-20 22:14:59,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-01-20 22:14:59,573 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:59,573 INFO L322 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:59,573 INFO L371 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:59,573 INFO L82 PathProgramCache]: Analyzing trace with hash -859199920, now seen corresponding path program 56 times [2018-01-20 22:14:59,573 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:59,573 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:59,574 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:59,574 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:59,574 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:59,585 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:15:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:00,438 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:15:00,439 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:15:00,443 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:15:00,451 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:00,461 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:00,464 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:15:00,466 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:15:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:00,501 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:15:00,501 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2018-01-20 22:15:00,501 INFO L409 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-01-20 22:15:00,501 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-01-20 22:15:00,502 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2018-01-20 22:15:00,502 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 61 states. [2018-01-20 22:15:00,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:15:00,601 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-01-20 22:15:00,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-01-20 22:15:00,602 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 73 [2018-01-20 22:15:00,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:15:00,603 INFO L225 Difference]: With dead ends: 84 [2018-01-20 22:15:00,603 INFO L226 Difference]: Without dead ends: 75 [2018-01-20 22:15:00,604 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1776, Invalid=2006, Unknown=0, NotChecked=0, Total=3782 [2018-01-20 22:15:00,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-01-20 22:15:00,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-01-20 22:15:00,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-01-20 22:15:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-01-20 22:15:00,608 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-01-20 22:15:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:15:00,608 INFO L432 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-01-20 22:15:00,609 INFO L433 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-01-20 22:15:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-01-20 22:15:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-01-20 22:15:00,609 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:15:00,609 INFO L322 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:15:00,609 INFO L371 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:15:00,610 INFO L82 PathProgramCache]: Analyzing trace with hash 2027598411, now seen corresponding path program 57 times [2018-01-20 22:15:00,610 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:15:00,610 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:15:00,610 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:00,611 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:15:00,611 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:15:00,624 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:15:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:01,714 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:15:01,714 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:15:01,719 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:15:01,726 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,727 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,728 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,730 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,731 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,732 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,733 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,735 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,736 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,738 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,739 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,741 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,742 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,744 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,745 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,746 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,748 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,749 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,751 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,752 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,754 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,755 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,757 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,758 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,760 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,761 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,763 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,764 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,766 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,768 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:01,768 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:15:01,771 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:15:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:01,807 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:15:01,807 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-01-20 22:15:01,808 INFO L409 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-01-20 22:15:01,808 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-01-20 22:15:01,808 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2018-01-20 22:15:01,808 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 62 states. [2018-01-20 22:15:01,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:15:01,886 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-01-20 22:15:01,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-01-20 22:15:01,886 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 74 [2018-01-20 22:15:01,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:15:01,887 INFO L225 Difference]: With dead ends: 85 [2018-01-20 22:15:01,887 INFO L226 Difference]: Without dead ends: 76 [2018-01-20 22:15:01,888 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1836, Invalid=2070, Unknown=0, NotChecked=0, Total=3906 [2018-01-20 22:15:01,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-01-20 22:15:01,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-01-20 22:15:01,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-20 22:15:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-01-20 22:15:01,892 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-01-20 22:15:01,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:15:01,893 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-01-20 22:15:01,893 INFO L433 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-01-20 22:15:01,893 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-01-20 22:15:01,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-01-20 22:15:01,893 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:15:01,894 INFO L322 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:15:01,894 INFO L371 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:15:01,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1324033456, now seen corresponding path program 58 times [2018-01-20 22:15:01,894 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:15:01,894 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:15:01,895 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:01,895 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:15:01,895 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:15:01,909 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:15:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:02,977 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:15:02,977 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:15:02,984 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:15:03,006 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:15:03,009 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:15:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:03,050 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:15:03,050 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2018-01-20 22:15:03,051 INFO L409 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-01-20 22:15:03,051 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-01-20 22:15:03,051 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2018-01-20 22:15:03,052 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 63 states. [2018-01-20 22:15:03,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:15:03,140 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-01-20 22:15:03,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-01-20 22:15:03,140 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 75 [2018-01-20 22:15:03,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:15:03,141 INFO L225 Difference]: With dead ends: 86 [2018-01-20 22:15:03,141 INFO L226 Difference]: Without dead ends: 77 [2018-01-20 22:15:03,141 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1897, Invalid=2135, Unknown=0, NotChecked=0, Total=4032 [2018-01-20 22:15:03,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-01-20 22:15:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-01-20 22:15:03,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-20 22:15:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-01-20 22:15:03,145 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-01-20 22:15:03,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:15:03,146 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-01-20 22:15:03,146 INFO L433 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-01-20 22:15:03,146 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-01-20 22:15:03,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-01-20 22:15:03,147 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:15:03,147 INFO L322 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:15:03,147 INFO L371 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:15:03,147 INFO L82 PathProgramCache]: Analyzing trace with hash 988356331, now seen corresponding path program 59 times [2018-01-20 22:15:03,147 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:15:03,147 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:15:03,148 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:03,148 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:15:03,148 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:15:03,163 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:15:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:04,328 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:15:04,328 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:15:04,333 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:15:04,339 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,340 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,341 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,341 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,342 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,343 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,344 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,345 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,346 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,346 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,347 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,349 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,350 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,351 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,352 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,353 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,354 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,355 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,356 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,358 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,359 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,360 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,361 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,363 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,364 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,365 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,367 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,368 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,370 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,371 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,376 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:04,377 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:15:04,380 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:15:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:04,430 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:15:04,430 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-01-20 22:15:04,431 INFO L409 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-01-20 22:15:04,432 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-01-20 22:15:04,432 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2018-01-20 22:15:04,432 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 64 states. [2018-01-20 22:15:04,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:15:04,522 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-01-20 22:15:04,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-01-20 22:15:04,522 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 76 [2018-01-20 22:15:04,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:15:04,523 INFO L225 Difference]: With dead ends: 87 [2018-01-20 22:15:04,523 INFO L226 Difference]: Without dead ends: 78 [2018-01-20 22:15:04,523 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1959, Invalid=2201, Unknown=0, NotChecked=0, Total=4160 [2018-01-20 22:15:04,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-01-20 22:15:04,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-01-20 22:15:04,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-01-20 22:15:04,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-01-20 22:15:04,525 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-01-20 22:15:04,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:15:04,526 INFO L432 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-01-20 22:15:04,526 INFO L433 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-01-20 22:15:04,526 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-01-20 22:15:04,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-01-20 22:15:04,526 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:15:04,526 INFO L322 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:15:04,526 INFO L371 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:15:04,527 INFO L82 PathProgramCache]: Analyzing trace with hash -827699952, now seen corresponding path program 60 times [2018-01-20 22:15:04,527 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:15:04,527 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:15:04,527 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:04,528 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:15:04,528 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:15:04,540 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:15:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:05,629 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:15:05,629 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:15:05,634 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:15:05,642 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,644 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,645 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,646 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,647 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,648 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,649 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,650 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,651 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,652 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,653 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,654 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,655 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,656 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,657 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,659 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,660 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,661 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,662 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,664 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,665 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,667 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,668 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,670 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,671 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,673 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,674 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,676 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,677 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,679 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,681 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:05,682 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:15:05,684 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:15:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:05,721 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:15:05,721 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2018-01-20 22:15:05,722 INFO L409 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-01-20 22:15:05,722 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-01-20 22:15:05,722 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2018-01-20 22:15:05,722 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 65 states. [2018-01-20 22:15:05,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:15:05,811 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-01-20 22:15:05,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-01-20 22:15:05,811 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 77 [2018-01-20 22:15:05,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:15:05,812 INFO L225 Difference]: With dead ends: 88 [2018-01-20 22:15:05,812 INFO L226 Difference]: Without dead ends: 79 [2018-01-20 22:15:05,812 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2022, Invalid=2268, Unknown=0, NotChecked=0, Total=4290 [2018-01-20 22:15:05,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-01-20 22:15:05,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-01-20 22:15:05,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-01-20 22:15:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-01-20 22:15:05,815 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-01-20 22:15:05,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:15:05,815 INFO L432 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-01-20 22:15:05,815 INFO L433 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-01-20 22:15:05,816 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-01-20 22:15:05,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-01-20 22:15:05,816 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:15:05,816 INFO L322 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:15:05,816 INFO L371 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:15:05,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1290869877, now seen corresponding path program 61 times [2018-01-20 22:15:05,816 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:15:05,816 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:15:05,817 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:05,817 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:15:05,817 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:15:05,828 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:15:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:07,207 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:15:07,207 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:15:07,212 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:15:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:15:07,240 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:15:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:07,308 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:15:07,309 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-01-20 22:15:07,309 INFO L409 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-01-20 22:15:07,309 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-01-20 22:15:07,310 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2018-01-20 22:15:07,310 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 66 states. [2018-01-20 22:15:07,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:15:07,418 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-01-20 22:15:07,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-01-20 22:15:07,418 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 78 [2018-01-20 22:15:07,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:15:07,419 INFO L225 Difference]: With dead ends: 89 [2018-01-20 22:15:07,419 INFO L226 Difference]: Without dead ends: 80 [2018-01-20 22:15:07,419 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2086, Invalid=2336, Unknown=0, NotChecked=0, Total=4422 [2018-01-20 22:15:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-01-20 22:15:07,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-01-20 22:15:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-01-20 22:15:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-01-20 22:15:07,422 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-01-20 22:15:07,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:15:07,422 INFO L432 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-01-20 22:15:07,422 INFO L433 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-01-20 22:15:07,422 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-01-20 22:15:07,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-01-20 22:15:07,422 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:15:07,422 INFO L322 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:15:07,423 INFO L371 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:15:07,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1530731632, now seen corresponding path program 62 times [2018-01-20 22:15:07,423 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:15:07,423 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:15:07,423 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:07,424 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:15:07,424 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:15:07,435 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:15:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:08,747 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:15:08,747 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:15:08,752 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:15:08,760 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:08,771 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:08,774 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:15:08,777 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:15:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:08,835 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:15:08,835 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2018-01-20 22:15:08,836 INFO L409 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-01-20 22:15:08,836 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-01-20 22:15:08,836 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2018-01-20 22:15:08,837 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 67 states. [2018-01-20 22:15:08,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:15:08,960 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-01-20 22:15:08,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-01-20 22:15:08,961 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 79 [2018-01-20 22:15:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:15:08,961 INFO L225 Difference]: With dead ends: 90 [2018-01-20 22:15:08,961 INFO L226 Difference]: Without dead ends: 81 [2018-01-20 22:15:08,962 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2151, Invalid=2405, Unknown=0, NotChecked=0, Total=4556 [2018-01-20 22:15:08,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-01-20 22:15:08,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-01-20 22:15:08,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-01-20 22:15:08,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-01-20 22:15:08,965 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-01-20 22:15:08,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:15:08,965 INFO L432 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-01-20 22:15:08,966 INFO L433 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-01-20 22:15:08,966 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-01-20 22:15:08,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-01-20 22:15:08,966 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:15:08,966 INFO L322 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:15:08,966 INFO L371 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:15:08,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1193934805, now seen corresponding path program 63 times [2018-01-20 22:15:08,967 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:15:08,967 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:15:08,968 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:08,968 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:15:08,968 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:15:08,977 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:15:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:10,343 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:15:10,344 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:15:10,349 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:15:10,358 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,359 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,360 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,361 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,362 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,363 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,364 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,365 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,366 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,367 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,368 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,370 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,371 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,372 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,373 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,374 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,375 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,377 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,378 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,379 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,381 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,382 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,384 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,385 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,387 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,388 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,390 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,391 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,393 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,394 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,396 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,398 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,430 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:15:10,431 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:15:10,434 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:15:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:10,472 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:15:10,472 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-01-20 22:15:10,472 INFO L409 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-01-20 22:15:10,472 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-01-20 22:15:10,473 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2018-01-20 22:15:10,473 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 68 states. [2018-01-20 22:15:10,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:15:10,593 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-01-20 22:15:10,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-01-20 22:15:10,594 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 80 [2018-01-20 22:15:10,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:15:10,594 INFO L225 Difference]: With dead ends: 91 [2018-01-20 22:15:10,594 INFO L226 Difference]: Without dead ends: 82 [2018-01-20 22:15:10,595 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2217, Invalid=2475, Unknown=0, NotChecked=0, Total=4692 [2018-01-20 22:15:10,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-01-20 22:15:10,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-01-20 22:15:10,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-01-20 22:15:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-01-20 22:15:10,598 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-01-20 22:15:10,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:15:10,598 INFO L432 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-01-20 22:15:10,598 INFO L433 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-01-20 22:15:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-01-20 22:15:10,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-01-20 22:15:10,599 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:15:10,599 INFO L322 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:15:10,599 INFO L371 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:15:10,599 INFO L82 PathProgramCache]: Analyzing trace with hash 240751568, now seen corresponding path program 64 times [2018-01-20 22:15:10,599 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:15:10,600 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:15:10,600 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:10,600 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:15:10,600 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:15:10,617 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:15:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:11,823 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:15:11,823 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:15:11,828 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:15:11,852 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:15:11,855 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:15:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:11,906 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:15:11,906 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2018-01-20 22:15:11,906 INFO L409 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-01-20 22:15:11,906 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-01-20 22:15:11,907 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2018-01-20 22:15:11,907 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 69 states. [2018-01-20 22:15:12,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:15:12,015 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-01-20 22:15:12,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-01-20 22:15:12,015 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 81 [2018-01-20 22:15:12,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:15:12,016 INFO L225 Difference]: With dead ends: 92 [2018-01-20 22:15:12,016 INFO L226 Difference]: Without dead ends: 83 [2018-01-20 22:15:12,016 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2284, Invalid=2546, Unknown=0, NotChecked=0, Total=4830 [2018-01-20 22:15:12,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-01-20 22:15:12,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-01-20 22:15:12,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-01-20 22:15:12,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-01-20 22:15:12,019 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-01-20 22:15:12,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:15:12,019 INFO L432 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-01-20 22:15:12,019 INFO L433 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-01-20 22:15:12,019 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-01-20 22:15:12,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-01-20 22:15:12,020 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:15:12,020 INFO L322 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:15:12,020 INFO L371 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:15:12,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1766356171, now seen corresponding path program 65 times [2018-01-20 22:15:12,020 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:15:12,020 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:15:12,021 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:12,021 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:15:12,021 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:15:12,031 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:15:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:13,225 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:15:13,225 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:15:13,230 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:15:13,234 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,235 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,236 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,237 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,237 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,238 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,239 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,240 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,241 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,241 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,242 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,243 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,244 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,245 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,246 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,247 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,248 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,249 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,250 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,251 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,252 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,253 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,254 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,255 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,257 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,258 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,259 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,260 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,262 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,263 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,264 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,266 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,267 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,271 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:13,273 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:15:13,276 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:15:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:13,315 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:15:13,315 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-01-20 22:15:13,315 INFO L409 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-01-20 22:15:13,316 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-01-20 22:15:13,316 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2018-01-20 22:15:13,316 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 70 states. [2018-01-20 22:15:13,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:15:13,413 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-01-20 22:15:13,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-01-20 22:15:13,413 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 82 [2018-01-20 22:15:13,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:15:13,414 INFO L225 Difference]: With dead ends: 93 [2018-01-20 22:15:13,414 INFO L226 Difference]: Without dead ends: 84 [2018-01-20 22:15:13,415 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2352, Invalid=2618, Unknown=0, NotChecked=0, Total=4970 [2018-01-20 22:15:13,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-01-20 22:15:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-01-20 22:15:13,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-01-20 22:15:13,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-01-20 22:15:13,419 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-01-20 22:15:13,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:15:13,419 INFO L432 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-01-20 22:15:13,419 INFO L433 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-01-20 22:15:13,419 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-01-20 22:15:13,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-01-20 22:15:13,420 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:15:13,420 INFO L322 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:15:13,420 INFO L371 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:15:13,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1815458608, now seen corresponding path program 66 times [2018-01-20 22:15:13,420 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:15:13,421 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:15:13,421 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:13,421 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:15:13,421 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:15:13,438 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:15:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:14,722 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:15:14,722 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:15:14,727 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:15:14,735 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,737 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,738 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,739 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,740 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,741 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,742 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,743 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,744 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,745 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,746 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,747 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,748 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,749 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,750 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,752 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,753 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,754 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,755 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,756 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,758 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,759 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,760 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,761 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,763 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,764 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,765 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,767 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,768 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,770 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,771 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,773 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,774 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,776 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:15:14,777 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:15:14,779 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:15:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:14,815 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:15:14,816 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2018-01-20 22:15:14,816 INFO L409 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-01-20 22:15:14,816 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-01-20 22:15:14,816 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2018-01-20 22:15:14,817 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 71 states. [2018-01-20 22:15:14,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:15:14,926 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-01-20 22:15:14,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-01-20 22:15:14,926 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 83 [2018-01-20 22:15:14,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:15:14,926 INFO L225 Difference]: With dead ends: 94 [2018-01-20 22:15:14,927 INFO L226 Difference]: Without dead ends: 85 [2018-01-20 22:15:14,927 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2421, Invalid=2691, Unknown=0, NotChecked=0, Total=5112 [2018-01-20 22:15:14,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-01-20 22:15:14,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-01-20 22:15:14,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-01-20 22:15:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-01-20 22:15:14,929 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-01-20 22:15:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:15:14,929 INFO L432 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-01-20 22:15:14,929 INFO L433 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-01-20 22:15:14,930 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-01-20 22:15:14,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-01-20 22:15:14,930 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:15:14,930 INFO L322 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:15:14,930 INFO L371 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:15:14,930 INFO L82 PathProgramCache]: Analyzing trace with hash -957333141, now seen corresponding path program 67 times [2018-01-20 22:15:14,930 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:15:14,930 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:15:14,931 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:14,931 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:15:14,931 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:15:14,942 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:15:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:16,220 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:15:16,221 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:15:16,225 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:15:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:15:16,247 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:15:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:16,290 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:15:16,290 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-01-20 22:15:16,291 INFO L409 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-01-20 22:15:16,291 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-01-20 22:15:16,291 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2018-01-20 22:15:16,291 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 72 states. [2018-01-20 22:15:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:15:16,405 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-01-20 22:15:16,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-01-20 22:15:16,406 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 84 [2018-01-20 22:15:16,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:15:16,406 INFO L225 Difference]: With dead ends: 95 [2018-01-20 22:15:16,406 INFO L226 Difference]: Without dead ends: 86 [2018-01-20 22:15:16,406 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2491, Invalid=2765, Unknown=0, NotChecked=0, Total=5256 [2018-01-20 22:15:16,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-20 22:15:16,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-01-20 22:15:16,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-20 22:15:16,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-01-20 22:15:16,409 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-01-20 22:15:16,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:15:16,409 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-01-20 22:15:16,409 INFO L433 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-01-20 22:15:16,409 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-01-20 22:15:16,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-01-20 22:15:16,410 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:15:16,410 INFO L322 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:15:16,410 INFO L371 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:15:16,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1014531440, now seen corresponding path program 68 times [2018-01-20 22:15:16,410 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:15:16,410 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:15:16,410 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:16,411 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:15:16,411 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:15:16,422 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:15:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:17,724 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:15:17,724 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 22:15:17,729 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:15:17,737 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:17,749 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:15:17,752 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:15:17,755 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:15:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:15:17,803 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:15:17,803 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2018-01-20 22:15:17,803 INFO L409 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-01-20 22:15:17,804 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-01-20 22:15:17,804 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2018-01-20 22:15:17,804 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 73 states. [2018-01-20 22:15:17,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:15:17,941 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-01-20 22:15:17,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-01-20 22:15:17,942 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 85 [2018-01-20 22:15:17,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:15:17,943 INFO L225 Difference]: With dead ends: 96 [2018-01-20 22:15:17,943 INFO L226 Difference]: Without dead ends: 87 [2018-01-20 22:15:17,943 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2562, Invalid=2840, Unknown=0, NotChecked=0, Total=5402 [2018-01-20 22:15:17,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-01-20 22:15:17,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-01-20 22:15:17,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-01-20 22:15:17,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-01-20 22:15:17,948 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-01-20 22:15:17,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:15:17,948 INFO L432 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-01-20 22:15:17,948 INFO L433 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-01-20 22:15:17,948 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-01-20 22:15:17,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-01-20 22:15:17,949 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:15:17,949 INFO L322 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:15:17,949 INFO L371 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:15:17,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1507288587, now seen corresponding path program 69 times [2018-01-20 22:15:17,950 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:15:17,950 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:15:17,951 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:17,951 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:15:17,951 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:15:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:15:17,981 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. Received shutdown request... [2018-01-20 22:15:19,111 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-20 22:15:19,113 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:15:19,113 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:15:19,113 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:15:19,113 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:15:19,113 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:15:19,113 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:15:19,113 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:15:19,113 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-20 22:15:19,113 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:15:19,114 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-01-20 22:15:19,115 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-20 22:15:19,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 10:15:19 BoogieIcfgContainer [2018-01-20 22:15:19,116 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-20 22:15:19,117 INFO L168 Benchmark]: Toolchain (without parser) took 50669.25 ms. Allocated memory was 305.7 MB in the beginning and 864.0 MB in the end (delta: 558.4 MB). Free memory was 265.0 MB in the beginning and 318.6 MB in the end (delta: -53.7 MB). Peak memory consumption was 504.7 MB. Max. memory is 5.3 GB. [2018-01-20 22:15:19,118 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 305.7 MB. Free memory is still 269.9 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-20 22:15:19,118 INFO L168 Benchmark]: CACSL2BoogieTranslator took 166.34 ms. Allocated memory is still 305.7 MB. Free memory was 265.0 MB in the beginning and 256.9 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 5.3 GB. [2018-01-20 22:15:19,118 INFO L168 Benchmark]: Boogie Preprocessor took 27.19 ms. Allocated memory is still 305.7 MB. Free memory was 256.9 MB in the beginning and 254.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-20 22:15:19,119 INFO L168 Benchmark]: RCFGBuilder took 177.97 ms. Allocated memory is still 305.7 MB. Free memory was 254.8 MB in the beginning and 243.2 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 5.3 GB. [2018-01-20 22:15:19,119 INFO L168 Benchmark]: TraceAbstraction took 50291.07 ms. Allocated memory was 305.7 MB in the beginning and 864.0 MB in the end (delta: 558.4 MB). Free memory was 243.2 MB in the beginning and 318.6 MB in the end (delta: -75.4 MB). Peak memory consumption was 482.9 MB. Max. memory is 5.3 GB. [2018-01-20 22:15:19,121 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 305.7 MB. Free memory is still 269.9 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 166.34 ms. Allocated memory is still 305.7 MB. Free memory was 265.0 MB in the beginning and 256.9 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 27.19 ms. Allocated memory is still 305.7 MB. Free memory was 256.9 MB in the beginning and 254.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 177.97 ms. Allocated memory is still 305.7 MB. Free memory was 254.8 MB in the beginning and 243.2 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 50291.07 ms. Allocated memory was 305.7 MB in the beginning and 864.0 MB in the end (delta: 558.4 MB). Free memory was 243.2 MB in the beginning and 318.6 MB in the end (delta: -75.4 MB). Peak memory consumption was 482.9 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 21 locations, 3 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 1). Cancelled while BasicCegarLoop was analyzing trace of length 87 with TraceHistMax 69, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 65 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 21 locations, 3 error locations. TIMEOUT Result, 50.0s OverallTime, 70 OverallIterations, 69 TraceHistogramMax, 4.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1107 SDtfs, 138 SDslu, 29303 SDs, 0 SdLazy, 4731 SolverSat, 99 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6125 GetRequests, 3504 SyntacticMatches, 0 SemanticMatches, 2621 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6969 ImplicationChecksByTransitivity, 36.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=69, 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: 0.2s AutomataMinimizationTime, 69 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 39.3s InterpolantComputationTime, 7021 NumberOfCodeBlocks, 7021 NumberOfCodeBlocksAsserted, 743 NumberOfCheckSat, 6884 ConstructedInterpolants, 0 QuantifiedInterpolants, 1019468 SizeOfPredicates, 68 NumberOfNonLiveVariables, 11186 ConjunctsInSsa, 2550 ConjunctsInUnsatCore, 137 InterpolantComputations, 1 PerfectInterpolantSequences, 0/109480 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 21 states). - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 21 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=21occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: 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/memsetNonZero_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-20_22-15-19-129.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memsetNonZero_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-20_22-15-19-129.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memsetNonZero_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-20_22-15-19-129.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memsetNonZero_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-20_22-15-19-129.csv Completed graceful shutdown