java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/memset3_false-valid-deref-write.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-20 22:13:37,815 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 22:13:37,817 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 22:13:37,831 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 22:13:37,832 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 22:13:37,833 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 22:13:37,834 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 22:13:37,835 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 22:13:37,837 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 22:13:37,838 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 22:13:37,839 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-20 22:13:37,839 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-20 22:13:37,840 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-20 22:13:37,842 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-20 22:13:37,842 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-20 22:13:37,845 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-20 22:13:37,847 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-20 22:13:37,849 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-20 22:13:37,851 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-20 22:13:37,852 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-20 22:13:37,854 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-20 22:13:37,854 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-20 22:13:37,855 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-20 22:13:37,856 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-20 22:13:37,857 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-20 22:13:37,858 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-20 22:13:37,858 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-20 22:13:37,859 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-20 22:13:37,859 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-20 22:13:37,860 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-20 22:13:37,860 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-20 22:13:37,861 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 22:13:37,870 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 22:13:37,870 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 22:13:37,871 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 22:13:37,871 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 22:13:37,871 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 22:13:37,871 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 22:13:37,871 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 22:13:37,872 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 22:13:37,872 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 22:13:37,872 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 22:13:37,872 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 22:13:37,872 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 22:13:37,872 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 22:13:37,873 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 22:13:37,873 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 22:13:37,873 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 22:13:37,873 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 22:13:37,873 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 22:13:37,873 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 22:13:37,873 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 22:13:37,874 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 22:13:37,874 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 22:13:37,874 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 22:13:37,874 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 22:13:37,874 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 22:13:37,874 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 22:13:37,875 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 22:13:37,875 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 22:13:37,875 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 22:13:37,875 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 22:13:37,875 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 22:13:37,875 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-20 22:13:37,875 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 22:13:37,876 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 22:13:37,876 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 22:13:37,876 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 22:13:37,877 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 22:13:37,911 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 22:13:37,922 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 22:13:37,925 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 22:13:37,927 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 22:13:37,927 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 22:13:37,927 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/memset3_false-valid-deref-write.c [2018-01-20 22:13:38,053 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 22:13:38,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 22:13:38,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 22:13:38,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 22:13:38,064 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 22:13:38,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 10:13:38" (1/1) ... [2018-01-20 22:13:38,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c111afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:38, skipping insertion in model container [2018-01-20 22:13:38,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 10:13:38" (1/1) ... [2018-01-20 22:13:38,082 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 22:13:38,096 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 22:13:38,205 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 22:13:38,219 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 22:13:38,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:38 WrapperNode [2018-01-20 22:13:38,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 22:13:38,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 22:13:38,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 22:13:38,225 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 22:13:38,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:38" (1/1) ... [2018-01-20 22:13:38,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:38" (1/1) ... [2018-01-20 22:13:38,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:38" (1/1) ... [2018-01-20 22:13:38,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:38" (1/1) ... [2018-01-20 22:13:38,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:38" (1/1) ... [2018-01-20 22:13:38,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:38" (1/1) ... [2018-01-20 22:13:38,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:38" (1/1) ... [2018-01-20 22:13:38,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 22:13:38,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 22:13:38,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 22:13:38,253 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 22:13:38,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:38" (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 22:13:38,300 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 22:13:38,300 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 22:13:38,300 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 22:13:38,300 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 22:13:38,301 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 22:13:38,301 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 22:13:38,301 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-01-20 22:13:38,301 INFO L136 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-01-20 22:13:38,301 INFO L128 BoogieDeclarations]: Found specification of procedure memset [2018-01-20 22:13:38,301 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 22:13:38,302 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 22:13:38,302 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 22:13:38,437 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 22:13:38,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:13:38 BoogieIcfgContainer [2018-01-20 22:13:38,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 22:13:38,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 22:13:38,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 22:13:38,440 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 22:13:38,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 10:13:38" (1/3) ... [2018-01-20 22:13:38,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140fe26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:13:38, skipping insertion in model container [2018-01-20 22:13:38,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 10:13:38" (2/3) ... [2018-01-20 22:13:38,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140fe26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:13:38, skipping insertion in model container [2018-01-20 22:13:38,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:13:38" (3/3) ... [2018-01-20 22:13:38,444 INFO L105 eAbstractionObserver]: Analyzing ICFG memset3_false-valid-deref-write.c [2018-01-20 22:13:38,451 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 22:13:38,456 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-20 22:13:38,490 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:13:38,491 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:13:38,491 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:13:38,491 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:13:38,491 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:13:38,491 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:13:38,491 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:13:38,491 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-20 22:13:38,492 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:13:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-01-20 22:13:38,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-20 22:13:38,513 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:38,515 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-20 22:13:38,515 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-20 22:13:38,520 INFO L82 PathProgramCache]: Analyzing trace with hash 51896, now seen corresponding path program 1 times [2018-01-20 22:13:38,523 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:38,523 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:38,578 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:38,578 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:38,579 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 22:13:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 22:13:38,635 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 22:13:38,641 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 22:13:38,647 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:13:38,648 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:13:38,648 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:13:38,648 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:13:38,648 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:13:38,648 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:13:38,648 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:13:38,648 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-20 22:13:38,648 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:13:38,649 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-01-20 22:13:38,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-20 22:13:38,650 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:38,650 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 22:13:38,650 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:38,650 INFO L82 PathProgramCache]: Analyzing trace with hash 126067280, now seen corresponding path program 1 times [2018-01-20 22:13:38,650 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:38,651 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:38,651 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:38,652 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:38,652 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:38,683 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:38,759 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 22:13:38,761 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 22:13:38,761 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-20 22:13:38,763 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-20 22:13:38,778 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-20 22:13:38,779 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-20 22:13:38,781 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2018-01-20 22:13:38,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:38,849 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-01-20 22:13:38,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-20 22:13:38,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-01-20 22:13:38,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:38,859 INFO L225 Difference]: With dead ends: 34 [2018-01-20 22:13:38,859 INFO L226 Difference]: Without dead ends: 20 [2018-01-20 22:13:38,863 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 22:13:38,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-01-20 22:13:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-01-20 22:13:38,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-01-20 22:13:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-01-20 22:13:38,959 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-01-20 22:13:38,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:38,959 INFO L432 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-01-20 22:13:38,959 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-20 22:13:38,959 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-01-20 22:13:38,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-20 22:13:38,960 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:38,960 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:38,960 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:38,960 INFO L82 PathProgramCache]: Analyzing trace with hash 763300235, now seen corresponding path program 1 times [2018-01-20 22:13:38,961 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:38,961 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:38,961 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:38,962 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:38,962 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:38,976 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:39,034 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 22:13:39,034 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:39,034 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 22:13:39,045 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:39,071 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:39,112 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 22:13:39,133 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:39,133 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-01-20 22:13:39,134 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-20 22:13:39,134 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-20 22:13:39,134 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-01-20 22:13:39,135 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 6 states. [2018-01-20 22:13:39,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:39,177 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-01-20 22:13:39,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-20 22:13:39,178 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-01-20 22:13:39,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:39,179 INFO L225 Difference]: With dead ends: 30 [2018-01-20 22:13:39,179 INFO L226 Difference]: Without dead ends: 21 [2018-01-20 22:13:39,180 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 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 22:13:39,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-01-20 22:13:39,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-01-20 22:13:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-01-20 22:13:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-01-20 22:13:39,185 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-01-20 22:13:39,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:39,186 INFO L432 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-01-20 22:13:39,186 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-20 22:13:39,186 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-01-20 22:13:39,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-20 22:13:39,187 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:39,187 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:39,187 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:39,188 INFO L82 PathProgramCache]: Analyzing trace with hash -957314640, now seen corresponding path program 2 times [2018-01-20 22:13:39,188 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:39,188 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:39,189 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:39,189 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:39,189 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:39,206 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:39,285 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 22:13:39,285 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:39,286 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:13:39,305 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:39,323 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:39,337 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:39,350 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:39,353 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:39,400 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 22:13:39,422 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:39,422 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-01-20 22:13:39,423 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-20 22:13:39,423 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-20 22:13:39,423 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-20 22:13:39,423 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 7 states. [2018-01-20 22:13:39,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:39,451 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-01-20 22:13:39,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-20 22:13:39,451 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-01-20 22:13:39,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:39,452 INFO L225 Difference]: With dead ends: 31 [2018-01-20 22:13:39,453 INFO L226 Difference]: Without dead ends: 22 [2018-01-20 22:13:39,453 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 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 22:13:39,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-01-20 22:13:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-01-20 22:13:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-01-20 22:13:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-01-20 22:13:39,459 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-01-20 22:13:39,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:39,459 INFO L432 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-01-20 22:13:39,459 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-20 22:13:39,460 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-01-20 22:13:39,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-20 22:13:39,460 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:39,461 INFO L322 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:39,461 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:39,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1538199083, now seen corresponding path program 3 times [2018-01-20 22:13:39,461 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:39,461 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:39,463 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:39,463 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:39,463 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:39,477 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:39,557 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 22:13:39,558 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:39,558 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 22:13:39,567 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:13:39,590 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:39,593 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:39,595 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:39,596 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:39,598 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:39,623 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 22:13:39,657 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:39,657 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-01-20 22:13:39,658 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-20 22:13:39,658 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-20 22:13:39,658 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-01-20 22:13:39,659 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 8 states. [2018-01-20 22:13:39,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:39,695 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-01-20 22:13:39,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-20 22:13:39,695 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-01-20 22:13:39,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:39,696 INFO L225 Difference]: With dead ends: 32 [2018-01-20 22:13:39,697 INFO L226 Difference]: Without dead ends: 23 [2018-01-20 22:13:39,697 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 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 22:13:39,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-01-20 22:13:39,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-01-20 22:13:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-01-20 22:13:39,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-01-20 22:13:39,702 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-01-20 22:13:39,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:39,702 INFO L432 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-01-20 22:13:39,702 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-20 22:13:39,702 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-01-20 22:13:39,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-20 22:13:39,703 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:39,703 INFO L322 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:39,703 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:39,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1589713168, now seen corresponding path program 4 times [2018-01-20 22:13:39,704 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:39,704 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:39,705 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:39,705 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:39,705 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:39,720 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:39,812 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 22:13:39,812 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:39,812 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 22:13:39,819 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:13:39,844 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:39,846 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:39,859 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 22:13:39,880 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:39,880 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-01-20 22:13:39,880 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-20 22:13:39,881 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-20 22:13:39,881 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-01-20 22:13:39,881 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2018-01-20 22:13:39,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:39,906 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-01-20 22:13:39,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-20 22:13:39,907 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-01-20 22:13:39,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:39,908 INFO L225 Difference]: With dead ends: 33 [2018-01-20 22:13:39,908 INFO L226 Difference]: Without dead ends: 24 [2018-01-20 22:13:39,908 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 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 22:13:39,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-01-20 22:13:39,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-01-20 22:13:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-01-20 22:13:39,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-01-20 22:13:39,914 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-01-20 22:13:39,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:39,914 INFO L432 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-01-20 22:13:39,914 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-20 22:13:39,915 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-01-20 22:13:39,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-20 22:13:39,916 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:39,916 INFO L322 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:39,916 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:39,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1108317493, now seen corresponding path program 5 times [2018-01-20 22:13:39,916 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:39,917 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:39,918 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:39,918 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:39,918 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:39,933 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:40,024 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 22:13:40,024 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:40,024 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 22:13:40,037 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:13:40,045 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:40,046 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:40,048 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:40,054 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:40,056 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:40,058 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:40,073 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 22:13:40,106 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:40,107 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-01-20 22:13:40,107 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-20 22:13:40,107 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-20 22:13:40,107 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-01-20 22:13:40,108 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 10 states. [2018-01-20 22:13:40,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:40,157 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-01-20 22:13:40,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-20 22:13:40,158 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2018-01-20 22:13:40,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:40,158 INFO L225 Difference]: With dead ends: 34 [2018-01-20 22:13:40,158 INFO L226 Difference]: Without dead ends: 25 [2018-01-20 22:13:40,159 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-01-20 22:13:40,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-01-20 22:13:40,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-01-20 22:13:40,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-01-20 22:13:40,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-01-20 22:13:40,164 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-01-20 22:13:40,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:40,164 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-01-20 22:13:40,164 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-20 22:13:40,164 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-01-20 22:13:40,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-20 22:13:40,165 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:40,165 INFO L322 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:40,165 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:40,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1152077936, now seen corresponding path program 6 times [2018-01-20 22:13:40,166 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:40,166 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:40,167 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:40,167 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:40,167 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:40,179 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:40,264 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 22:13:40,264 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:40,265 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 22:13:40,270 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:13:40,281 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:40,284 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:40,286 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:40,287 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:40,288 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:40,290 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:40,306 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 22:13:40,336 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:40,336 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-01-20 22:13:40,336 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-20 22:13:40,336 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-20 22:13:40,337 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2018-01-20 22:13:40,337 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 11 states. [2018-01-20 22:13:40,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:40,368 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-01-20 22:13:40,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-20 22:13:40,372 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-01-20 22:13:40,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:40,373 INFO L225 Difference]: With dead ends: 35 [2018-01-20 22:13:40,373 INFO L226 Difference]: Without dead ends: 26 [2018-01-20 22:13:40,374 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 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 22:13:40,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-01-20 22:13:40,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-01-20 22:13:40,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-01-20 22:13:40,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-01-20 22:13:40,378 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-01-20 22:13:40,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:40,379 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-01-20 22:13:40,379 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-20 22:13:40,379 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-01-20 22:13:40,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-20 22:13:40,380 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:40,380 INFO L322 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:40,381 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:40,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1790107797, now seen corresponding path program 7 times [2018-01-20 22:13:40,381 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:40,381 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:40,382 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:40,382 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:40,382 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:40,395 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:40,478 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 22:13:40,478 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:40,478 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 22:13:40,485 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:40,501 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:40,518 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 22:13:40,539 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:40,539 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-01-20 22:13:40,540 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-20 22:13:40,540 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-20 22:13:40,540 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2018-01-20 22:13:40,540 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 12 states. [2018-01-20 22:13:40,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:40,572 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-01-20 22:13:40,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-20 22:13:40,573 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2018-01-20 22:13:40,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:40,574 INFO L225 Difference]: With dead ends: 36 [2018-01-20 22:13:40,574 INFO L226 Difference]: Without dead ends: 27 [2018-01-20 22:13:40,574 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 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 22:13:40,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-01-20 22:13:40,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-01-20 22:13:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-01-20 22:13:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-01-20 22:13:40,577 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-01-20 22:13:40,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:40,578 INFO L432 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-01-20 22:13:40,578 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-20 22:13:40,578 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-01-20 22:13:40,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-20 22:13:40,578 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:40,578 INFO L322 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:40,578 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:40,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1491414992, now seen corresponding path program 8 times [2018-01-20 22:13:40,579 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:40,579 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:40,579 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:40,580 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:40,580 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:40,590 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:40,716 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 22:13:40,716 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:40,716 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 22:13:40,727 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:40,737 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:40,740 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:40,740 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:40,742 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:40,759 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 22:13:40,783 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:40,783 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-01-20 22:13:40,783 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-20 22:13:40,783 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-20 22:13:40,784 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2018-01-20 22:13:40,784 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 13 states. [2018-01-20 22:13:40,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:40,820 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-01-20 22:13:40,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-20 22:13:40,821 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2018-01-20 22:13:40,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:40,822 INFO L225 Difference]: With dead ends: 37 [2018-01-20 22:13:40,822 INFO L226 Difference]: Without dead ends: 28 [2018-01-20 22:13:40,822 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 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 22:13:40,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-01-20 22:13:40,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-01-20 22:13:40,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-01-20 22:13:40,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-01-20 22:13:40,825 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-01-20 22:13:40,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:40,826 INFO L432 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-01-20 22:13:40,826 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-20 22:13:40,826 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-01-20 22:13:40,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-20 22:13:40,826 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:40,826 INFO L322 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:40,826 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:40,827 INFO L82 PathProgramCache]: Analyzing trace with hash 139406347, now seen corresponding path program 9 times [2018-01-20 22:13:40,827 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:40,827 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:40,827 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:40,828 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:40,828 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:40,839 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:40,991 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 22:13:40,991 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:40,992 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 22:13:41,001 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:13:41,013 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:41,019 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:41,021 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:41,022 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:41,024 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:41,026 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:41,027 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:41,030 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:41,061 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 22:13:41,083 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:41,083 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-01-20 22:13:41,084 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-20 22:13:41,084 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-20 22:13:41,084 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2018-01-20 22:13:41,084 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 14 states. [2018-01-20 22:13:41,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:41,122 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-01-20 22:13:41,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-20 22:13:41,122 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-01-20 22:13:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:41,123 INFO L225 Difference]: With dead ends: 38 [2018-01-20 22:13:41,123 INFO L226 Difference]: Without dead ends: 29 [2018-01-20 22:13:41,124 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 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 22:13:41,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-01-20 22:13:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-01-20 22:13:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-01-20 22:13:41,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-01-20 22:13:41,128 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-01-20 22:13:41,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:41,128 INFO L432 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-01-20 22:13:41,128 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-20 22:13:41,128 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-01-20 22:13:41,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-20 22:13:41,129 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:41,129 INFO L322 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:41,130 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:41,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1176811312, now seen corresponding path program 10 times [2018-01-20 22:13:41,130 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:41,130 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:41,131 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:41,131 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:41,131 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:41,141 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:41,317 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 22:13:41,317 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:41,317 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 22:13:41,327 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:13:41,343 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:41,346 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:41,362 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 22:13:41,382 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:41,383 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-01-20 22:13:41,383 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-20 22:13:41,383 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-20 22:13:41,383 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2018-01-20 22:13:41,383 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-01-20 22:13:41,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:41,413 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-01-20 22:13:41,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-20 22:13:41,413 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-01-20 22:13:41,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:41,414 INFO L225 Difference]: With dead ends: 39 [2018-01-20 22:13:41,414 INFO L226 Difference]: Without dead ends: 30 [2018-01-20 22:13:41,414 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2018-01-20 22:13:41,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-01-20 22:13:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-01-20 22:13:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-01-20 22:13:41,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-01-20 22:13:41,417 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-01-20 22:13:41,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:41,418 INFO L432 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-01-20 22:13:41,418 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-20 22:13:41,418 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-01-20 22:13:41,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-20 22:13:41,419 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:41,419 INFO L322 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:41,419 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:41,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1023373141, now seen corresponding path program 11 times [2018-01-20 22:13:41,419 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:41,419 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:41,420 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:41,420 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:41,420 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:41,429 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:41,550 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 22:13:41,550 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:41,550 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 22:13:41,555 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:13:41,559 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:41,560 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:41,561 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:41,562 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:41,563 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:41,564 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:41,569 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:41,570 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:41,572 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:41,590 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 22:13:41,612 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:41,612 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-01-20 22:13:41,612 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-20 22:13:41,613 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-20 22:13:41,613 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2018-01-20 22:13:41,613 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 16 states. [2018-01-20 22:13:41,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:41,646 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-01-20 22:13:41,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-20 22:13:41,646 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2018-01-20 22:13:41,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:41,647 INFO L225 Difference]: With dead ends: 40 [2018-01-20 22:13:41,647 INFO L226 Difference]: Without dead ends: 31 [2018-01-20 22:13:41,648 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 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 22:13:41,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-01-20 22:13:41,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-01-20 22:13:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-01-20 22:13:41,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-01-20 22:13:41,652 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-01-20 22:13:41,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:41,652 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-01-20 22:13:41,652 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-20 22:13:41,652 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-01-20 22:13:41,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-20 22:13:41,653 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:41,653 INFO L322 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:41,653 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:41,654 INFO L82 PathProgramCache]: Analyzing trace with hash -509614448, now seen corresponding path program 12 times [2018-01-20 22:13:41,654 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:41,654 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:41,655 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:41,655 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:41,655 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:41,663 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:41,803 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 22:13:41,803 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:41,804 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 22:13:41,808 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:13:41,815 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:41,817 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:41,818 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:41,819 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:41,820 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:41,822 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:41,823 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:41,824 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:41,825 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:41,843 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 22:13:41,864 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:41,864 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-01-20 22:13:41,864 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-20 22:13:41,864 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-20 22:13:41,865 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2018-01-20 22:13:41,865 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 17 states. [2018-01-20 22:13:41,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:41,890 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-01-20 22:13:41,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-20 22:13:41,891 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-01-20 22:13:41,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:41,892 INFO L225 Difference]: With dead ends: 41 [2018-01-20 22:13:41,892 INFO L226 Difference]: Without dead ends: 32 [2018-01-20 22:13:41,893 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2018-01-20 22:13:41,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-01-20 22:13:41,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-01-20 22:13:41,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-01-20 22:13:41,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-01-20 22:13:41,897 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-01-20 22:13:41,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:41,897 INFO L432 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-01-20 22:13:41,897 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-20 22:13:41,897 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-01-20 22:13:41,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-20 22:13:41,898 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:41,898 INFO L322 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:41,898 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:41,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1762964149, now seen corresponding path program 13 times [2018-01-20 22:13:41,899 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:41,899 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:41,900 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:41,900 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:41,900 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:41,910 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:42,021 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 22:13:42,021 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:42,022 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 22:13:42,027 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:42,040 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:42,054 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 22:13:42,075 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:42,075 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-01-20 22:13:42,075 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-20 22:13:42,075 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-20 22:13:42,075 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2018-01-20 22:13:42,076 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 18 states. [2018-01-20 22:13:42,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:42,099 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-01-20 22:13:42,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-20 22:13:42,099 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2018-01-20 22:13:42,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:42,100 INFO L225 Difference]: With dead ends: 42 [2018-01-20 22:13:42,100 INFO L226 Difference]: Without dead ends: 33 [2018-01-20 22:13:42,100 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=200, Unknown=0, NotChecked=0, Total=342 [2018-01-20 22:13:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-01-20 22:13:42,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-01-20 22:13:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-01-20 22:13:42,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-01-20 22:13:42,103 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-01-20 22:13:42,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:42,104 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-01-20 22:13:42,104 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-20 22:13:42,104 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-01-20 22:13:42,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-20 22:13:42,104 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:42,104 INFO L322 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:42,104 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:42,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1962099216, now seen corresponding path program 14 times [2018-01-20 22:13:42,105 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:42,105 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:42,105 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:42,105 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:42,106 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:42,114 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:42,234 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 22:13:42,234 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:42,234 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 22:13:42,239 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:42,248 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:42,252 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:42,253 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:42,255 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:42,268 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 22:13:42,289 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:42,289 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-01-20 22:13:42,289 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-20 22:13:42,289 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-20 22:13:42,289 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2018-01-20 22:13:42,290 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 19 states. [2018-01-20 22:13:42,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:42,325 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-01-20 22:13:42,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-20 22:13:42,326 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2018-01-20 22:13:42,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:42,326 INFO L225 Difference]: With dead ends: 43 [2018-01-20 22:13:42,326 INFO L226 Difference]: Without dead ends: 34 [2018-01-20 22:13:42,327 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 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 22:13:42,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-01-20 22:13:42,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-01-20 22:13:42,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-01-20 22:13:42,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-01-20 22:13:42,331 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-01-20 22:13:42,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:42,332 INFO L432 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-01-20 22:13:42,332 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-20 22:13:42,332 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-01-20 22:13:42,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-20 22:13:42,333 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:42,333 INFO L322 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:42,333 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:42,333 INFO L82 PathProgramCache]: Analyzing trace with hash 454648299, now seen corresponding path program 15 times [2018-01-20 22:13:42,334 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:42,334 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:42,334 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:42,335 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:42,335 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:42,343 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:42,472 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 22:13:42,472 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:42,472 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 22:13:42,480 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:13:42,487 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:42,489 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:42,490 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:42,491 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:42,492 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:42,493 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:42,494 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:42,495 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:42,496 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:42,497 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:42,498 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:42,510 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 22:13:42,530 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:42,530 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-01-20 22:13:42,530 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-20 22:13:42,531 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-20 22:13:42,531 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2018-01-20 22:13:42,531 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 20 states. [2018-01-20 22:13:42,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:42,566 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-01-20 22:13:42,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-20 22:13:42,566 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2018-01-20 22:13:42,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:42,567 INFO L225 Difference]: With dead ends: 44 [2018-01-20 22:13:42,567 INFO L226 Difference]: Without dead ends: 35 [2018-01-20 22:13:42,568 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 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 22:13:42,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-01-20 22:13:42,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-01-20 22:13:42,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-20 22:13:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-01-20 22:13:42,571 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-01-20 22:13:42,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:42,571 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-01-20 22:13:42,571 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-20 22:13:42,571 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-01-20 22:13:42,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-20 22:13:42,571 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:42,572 INFO L322 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:42,572 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:42,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1935590064, now seen corresponding path program 16 times [2018-01-20 22:13:42,572 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:42,572 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:42,572 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:42,572 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:42,573 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:42,581 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:42,995 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 22:13:42,995 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:42,996 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 22:13:43,006 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:13:43,024 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:43,026 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:43,065 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 22:13:43,098 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:43,098 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-01-20 22:13:43,098 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-20 22:13:43,098 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-20 22:13:43,099 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2018-01-20 22:13:43,099 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 21 states. [2018-01-20 22:13:43,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:43,195 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-01-20 22:13:43,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-20 22:13:43,199 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2018-01-20 22:13:43,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:43,200 INFO L225 Difference]: With dead ends: 45 [2018-01-20 22:13:43,200 INFO L226 Difference]: Without dead ends: 36 [2018-01-20 22:13:43,201 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=266, Unknown=0, NotChecked=0, Total=462 [2018-01-20 22:13:43,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-20 22:13:43,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-20 22:13:43,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-20 22:13:43,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-01-20 22:13:43,205 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-01-20 22:13:43,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:43,205 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-01-20 22:13:43,205 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-20 22:13:43,205 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-01-20 22:13:43,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-20 22:13:43,206 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:43,206 INFO L322 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:43,206 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:43,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1276432011, now seen corresponding path program 17 times [2018-01-20 22:13:43,207 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:43,207 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:43,207 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:43,207 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:43,208 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:43,216 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:43,389 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 22:13:43,389 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:43,390 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 22:13:43,394 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:13:43,398 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:43,399 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:43,400 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:43,401 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:43,402 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:43,402 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:43,403 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:43,404 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:43,405 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:43,409 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:43,410 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:43,412 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:43,423 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 22:13:43,444 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:43,444 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-01-20 22:13:43,445 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-20 22:13:43,445 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-20 22:13:43,445 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2018-01-20 22:13:43,445 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 22 states. [2018-01-20 22:13:43,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:43,480 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-01-20 22:13:43,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-20 22:13:43,480 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2018-01-20 22:13:43,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:43,481 INFO L225 Difference]: With dead ends: 46 [2018-01-20 22:13:43,481 INFO L226 Difference]: Without dead ends: 37 [2018-01-20 22:13:43,482 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=216, Invalid=290, Unknown=0, NotChecked=0, Total=506 [2018-01-20 22:13:43,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-20 22:13:43,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-20 22:13:43,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-20 22:13:43,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-01-20 22:13:43,485 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-01-20 22:13:43,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:43,485 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-01-20 22:13:43,485 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-20 22:13:43,485 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-01-20 22:13:43,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-20 22:13:43,485 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:43,485 INFO L322 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:43,485 INFO L371 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:43,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2064868528, now seen corresponding path program 18 times [2018-01-20 22:13:43,486 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:43,486 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:43,486 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:43,486 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:43,487 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:43,495 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:43,676 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 22:13:43,676 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:43,676 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 22:13:43,681 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:13:43,687 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:43,689 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:43,690 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:43,691 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:43,692 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:43,693 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:43,694 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:43,695 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:43,696 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:43,697 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:43,697 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:43,699 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:43,718 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 22:13:43,739 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:43,739 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-01-20 22:13:43,739 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-01-20 22:13:43,739 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-01-20 22:13:43,739 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2018-01-20 22:13:43,739 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 23 states. [2018-01-20 22:13:43,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:43,812 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-01-20 22:13:43,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-20 22:13:43,812 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 36 [2018-01-20 22:13:43,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:43,812 INFO L225 Difference]: With dead ends: 47 [2018-01-20 22:13:43,813 INFO L226 Difference]: Without dead ends: 38 [2018-01-20 22:13:43,813 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 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 22:13:43,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-01-20 22:13:43,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-01-20 22:13:43,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-20 22:13:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-01-20 22:13:43,816 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-01-20 22:13:43,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:43,816 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-01-20 22:13:43,816 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-01-20 22:13:43,816 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-01-20 22:13:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-20 22:13:43,817 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:43,857 INFO L322 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:43,857 INFO L371 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:43,858 INFO L82 PathProgramCache]: Analyzing trace with hash 736596779, now seen corresponding path program 19 times [2018-01-20 22:13:43,858 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:43,858 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:43,858 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:43,859 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:43,859 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:43,865 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:44,123 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 22:13:44,124 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:44,124 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 22:13:44,129 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:44,145 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:44,161 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 22:13:44,184 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:44,184 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-01-20 22:13:44,184 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-20 22:13:44,184 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-20 22:13:44,185 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2018-01-20 22:13:44,185 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 24 states. [2018-01-20 22:13:44,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:44,230 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-01-20 22:13:44,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-20 22:13:44,230 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 37 [2018-01-20 22:13:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:44,231 INFO L225 Difference]: With dead ends: 48 [2018-01-20 22:13:44,231 INFO L226 Difference]: Without dead ends: 39 [2018-01-20 22:13:44,231 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2018-01-20 22:13:44,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-20 22:13:44,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-20 22:13:44,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-20 22:13:44,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-01-20 22:13:44,234 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-01-20 22:13:44,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:44,234 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-01-20 22:13:44,235 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-20 22:13:44,235 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-01-20 22:13:44,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-20 22:13:44,235 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:44,235 INFO L322 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:44,235 INFO L371 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:44,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1785121776, now seen corresponding path program 20 times [2018-01-20 22:13:44,236 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:44,236 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:44,237 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:44,237 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:44,237 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:44,247 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:44,446 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 22:13:44,446 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:44,446 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 22:13:44,451 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:44,458 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:44,463 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:44,464 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:44,466 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:44,479 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 22:13:44,501 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:44,501 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-01-20 22:13:44,501 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-01-20 22:13:44,501 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-01-20 22:13:44,501 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2018-01-20 22:13:44,502 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 25 states. [2018-01-20 22:13:44,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:44,530 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-01-20 22:13:44,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-20 22:13:44,530 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2018-01-20 22:13:44,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:44,530 INFO L225 Difference]: With dead ends: 49 [2018-01-20 22:13:44,531 INFO L226 Difference]: Without dead ends: 40 [2018-01-20 22:13:44,531 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 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 22:13:44,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-20 22:13:44,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-01-20 22:13:44,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-20 22:13:44,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-01-20 22:13:44,534 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-01-20 22:13:44,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:44,534 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-01-20 22:13:44,534 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-01-20 22:13:44,534 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-01-20 22:13:44,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-20 22:13:44,535 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:44,535 INFO L322 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:44,535 INFO L371 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:44,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1645981643, now seen corresponding path program 21 times [2018-01-20 22:13:44,535 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:44,535 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:44,536 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:44,536 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:44,537 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:44,543 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:44,733 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 22:13:44,733 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:44,733 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 22:13:44,738 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:13:44,746 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:44,748 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:44,749 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:44,750 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:44,752 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:44,753 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:44,754 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:44,755 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:44,756 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:44,757 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:44,759 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:44,760 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:44,760 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:44,762 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:44,780 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 22:13:44,801 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:44,801 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-01-20 22:13:44,801 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-20 22:13:44,802 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-20 22:13:44,802 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2018-01-20 22:13:44,802 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 26 states. [2018-01-20 22:13:44,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:44,833 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-01-20 22:13:44,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-20 22:13:44,833 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 39 [2018-01-20 22:13:44,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:44,833 INFO L225 Difference]: With dead ends: 50 [2018-01-20 22:13:44,834 INFO L226 Difference]: Without dead ends: 41 [2018-01-20 22:13:44,834 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 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 22:13:44,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-20 22:13:44,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-20 22:13:44,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-20 22:13:44,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-01-20 22:13:44,838 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-01-20 22:13:44,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:44,838 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-01-20 22:13:44,838 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-20 22:13:44,839 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-01-20 22:13:44,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-01-20 22:13:44,839 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:44,839 INFO L322 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:44,839 INFO L371 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:44,840 INFO L82 PathProgramCache]: Analyzing trace with hash 636005232, now seen corresponding path program 22 times [2018-01-20 22:13:44,840 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:44,840 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:44,841 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:44,841 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:44,841 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:44,850 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:45,057 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 22:13:45,057 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:45,057 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 22:13:45,064 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:13:45,079 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:45,085 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:45,100 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 22:13:45,129 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:45,129 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-01-20 22:13:45,129 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-01-20 22:13:45,129 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-01-20 22:13:45,129 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2018-01-20 22:13:45,130 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 27 states. [2018-01-20 22:13:45,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:45,168 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-01-20 22:13:45,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-20 22:13:45,168 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 40 [2018-01-20 22:13:45,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:45,169 INFO L225 Difference]: With dead ends: 51 [2018-01-20 22:13:45,169 INFO L226 Difference]: Without dead ends: 42 [2018-01-20 22:13:45,169 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=331, Invalid=425, Unknown=0, NotChecked=0, Total=756 [2018-01-20 22:13:45,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-01-20 22:13:45,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-01-20 22:13:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-20 22:13:45,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-01-20 22:13:45,172 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-01-20 22:13:45,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:45,173 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-01-20 22:13:45,173 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-01-20 22:13:45,173 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-01-20 22:13:45,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-20 22:13:45,174 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:45,174 INFO L322 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:45,174 INFO L371 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:45,174 INFO L82 PathProgramCache]: Analyzing trace with hash -608492437, now seen corresponding path program 23 times [2018-01-20 22:13:45,174 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:45,174 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:45,175 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:45,175 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:45,175 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:45,183 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:45,399 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 22:13:45,399 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:45,399 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 22:13:45,405 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:13:45,411 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:45,412 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:45,414 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:45,415 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:45,417 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:45,418 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:45,420 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:45,421 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:45,422 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:45,423 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:45,425 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:45,426 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:45,431 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:45,432 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:45,434 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:45,449 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 22:13:45,474 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:45,474 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-01-20 22:13:45,475 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-20 22:13:45,475 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-20 22:13:45,475 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2018-01-20 22:13:45,475 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 28 states. [2018-01-20 22:13:45,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:45,515 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-01-20 22:13:45,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-20 22:13:45,515 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 41 [2018-01-20 22:13:45,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:45,516 INFO L225 Difference]: With dead ends: 52 [2018-01-20 22:13:45,516 INFO L226 Difference]: Without dead ends: 43 [2018-01-20 22:13:45,516 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=357, Invalid=455, Unknown=0, NotChecked=0, Total=812 [2018-01-20 22:13:45,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-20 22:13:45,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-20 22:13:45,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-20 22:13:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-01-20 22:13:45,519 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-01-20 22:13:45,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:45,519 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-01-20 22:13:45,519 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-20 22:13:45,520 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-01-20 22:13:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-20 22:13:45,520 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:45,520 INFO L322 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:45,520 INFO L371 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:45,520 INFO L82 PathProgramCache]: Analyzing trace with hash -533214512, now seen corresponding path program 24 times [2018-01-20 22:13:45,520 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:45,521 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:45,521 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:45,521 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:45,522 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:45,529 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:45,860 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 22:13:45,860 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:45,860 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 22:13:45,867 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:13:45,874 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:45,876 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:45,877 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:45,879 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:45,880 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:45,881 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:45,882 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:45,883 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:45,884 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:45,885 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:45,887 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:45,888 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:45,889 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:45,889 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:45,891 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:45,906 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 22:13:45,927 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:45,927 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-01-20 22:13:45,927 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-01-20 22:13:45,927 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-01-20 22:13:45,928 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2018-01-20 22:13:45,928 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 29 states. [2018-01-20 22:13:45,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:45,962 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-01-20 22:13:45,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-20 22:13:45,962 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 42 [2018-01-20 22:13:45,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:45,962 INFO L225 Difference]: With dead ends: 53 [2018-01-20 22:13:45,962 INFO L226 Difference]: Without dead ends: 44 [2018-01-20 22:13:45,963 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 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 22:13:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-01-20 22:13:45,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-01-20 22:13:45,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-20 22:13:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-01-20 22:13:45,966 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-01-20 22:13:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:45,966 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-01-20 22:13:45,966 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-01-20 22:13:45,966 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-01-20 22:13:45,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-01-20 22:13:45,967 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:45,967 INFO L322 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:45,967 INFO L371 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:45,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1800401163, now seen corresponding path program 25 times [2018-01-20 22:13:45,967 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:45,967 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:45,968 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:45,968 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:45,968 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:45,977 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:46,248 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 22:13:46,248 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:46,248 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 22:13:46,256 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:46,273 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:46,291 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 22:13:46,325 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:46,326 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-01-20 22:13:46,326 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-20 22:13:46,326 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-20 22:13:46,327 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2018-01-20 22:13:46,327 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 30 states. [2018-01-20 22:13:46,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:46,365 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-01-20 22:13:46,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-20 22:13:46,365 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 43 [2018-01-20 22:13:46,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:46,365 INFO L225 Difference]: With dead ends: 54 [2018-01-20 22:13:46,366 INFO L226 Difference]: Without dead ends: 45 [2018-01-20 22:13:46,366 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 43 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 22:13:46,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-20 22:13:46,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-01-20 22:13:46,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-20 22:13:46,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-01-20 22:13:46,369 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-01-20 22:13:46,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:46,369 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-01-20 22:13:46,369 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-20 22:13:46,369 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-01-20 22:13:46,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-20 22:13:46,369 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:46,370 INFO L322 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:46,370 INFO L371 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:46,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1128043056, now seen corresponding path program 26 times [2018-01-20 22:13:46,370 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:46,370 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:46,370 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:46,371 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:46,371 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:46,380 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:46,698 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 22:13:46,698 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:46,698 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 22:13:46,704 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:46,711 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:46,717 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:46,720 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:46,722 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:46,737 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 22:13:46,757 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:46,757 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-01-20 22:13:46,757 INFO L409 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-01-20 22:13:46,758 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-01-20 22:13:46,758 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2018-01-20 22:13:46,758 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 31 states. [2018-01-20 22:13:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:46,791 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-01-20 22:13:46,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-20 22:13:46,791 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2018-01-20 22:13:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:46,792 INFO L225 Difference]: With dead ends: 55 [2018-01-20 22:13:46,792 INFO L226 Difference]: Without dead ends: 46 [2018-01-20 22:13:46,792 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 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 22:13:46,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-20 22:13:46,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-01-20 22:13:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-01-20 22:13:46,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-01-20 22:13:46,795 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-01-20 22:13:46,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:46,796 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-01-20 22:13:46,796 INFO L433 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-01-20 22:13:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-01-20 22:13:46,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-01-20 22:13:46,796 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:46,796 INFO L322 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:46,796 INFO L371 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:46,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1759778219, now seen corresponding path program 27 times [2018-01-20 22:13:46,797 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:46,797 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:46,797 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:46,797 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:46,798 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:46,807 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:47,117 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 22:13:47,117 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:47,117 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 22:13:47,128 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:13:47,136 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:47,138 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:47,139 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:47,140 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:47,141 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:47,143 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:47,144 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:47,145 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:47,146 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:47,147 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:47,148 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:47,150 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:47,163 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:47,177 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:47,190 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:47,201 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:47,203 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:47,215 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 22:13:47,234 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:47,234 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-01-20 22:13:47,234 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-20 22:13:47,235 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-20 22:13:47,235 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2018-01-20 22:13:47,235 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 32 states. [2018-01-20 22:13:47,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:47,317 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-01-20 22:13:47,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-20 22:13:47,317 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 45 [2018-01-20 22:13:47,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:47,318 INFO L225 Difference]: With dead ends: 56 [2018-01-20 22:13:47,318 INFO L226 Difference]: Without dead ends: 47 [2018-01-20 22:13:47,319 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=471, Invalid=585, Unknown=0, NotChecked=0, Total=1056 [2018-01-20 22:13:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-01-20 22:13:47,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-01-20 22:13:47,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-01-20 22:13:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-01-20 22:13:47,323 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-01-20 22:13:47,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:47,324 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-01-20 22:13:47,324 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-20 22:13:47,324 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-01-20 22:13:47,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-20 22:13:47,324 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:47,324 INFO L322 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:47,324 INFO L371 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:47,324 INFO L82 PathProgramCache]: Analyzing trace with hash -131268208, now seen corresponding path program 28 times [2018-01-20 22:13:47,324 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:47,324 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:47,325 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:47,325 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:47,325 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:47,332 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:47,615 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 22:13:47,615 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:47,615 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 22:13:47,624 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:13:47,641 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:47,643 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:47,654 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 22:13:47,675 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:47,676 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-01-20 22:13:47,676 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-01-20 22:13:47,676 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-01-20 22:13:47,676 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2018-01-20 22:13:47,677 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 33 states. [2018-01-20 22:13:47,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:47,747 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-01-20 22:13:47,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-01-20 22:13:47,747 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 46 [2018-01-20 22:13:47,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:47,748 INFO L225 Difference]: With dead ends: 57 [2018-01-20 22:13:47,748 INFO L226 Difference]: Without dead ends: 48 [2018-01-20 22:13:47,749 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 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 22:13:47,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-01-20 22:13:47,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-01-20 22:13:47,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-20 22:13:47,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-01-20 22:13:47,753 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-01-20 22:13:47,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:47,754 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-01-20 22:13:47,754 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-01-20 22:13:47,754 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-01-20 22:13:47,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-01-20 22:13:47,755 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:47,755 INFO L322 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:47,755 INFO L371 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:47,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1375834699, now seen corresponding path program 29 times [2018-01-20 22:13:47,755 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:47,755 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:47,756 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:47,756 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:47,756 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:47,768 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:48,104 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 22:13:48,104 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:48,104 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 22:13:48,110 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:13:48,114 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:48,115 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:48,116 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:48,116 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:48,117 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:48,118 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:48,119 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:48,120 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:48,120 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:48,121 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:48,122 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:48,123 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:48,124 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:48,125 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:48,126 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:48,130 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:48,131 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:48,133 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:48,149 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 22:13:48,179 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:48,179 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-01-20 22:13:48,179 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-20 22:13:48,180 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-20 22:13:48,180 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2018-01-20 22:13:48,180 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 34 states. [2018-01-20 22:13:48,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:48,227 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-01-20 22:13:48,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-01-20 22:13:48,227 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 47 [2018-01-20 22:13:48,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:48,228 INFO L225 Difference]: With dead ends: 58 [2018-01-20 22:13:48,228 INFO L226 Difference]: Without dead ends: 49 [2018-01-20 22:13:48,228 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 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 22:13:48,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-20 22:13:48,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-01-20 22:13:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-20 22:13:48,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-01-20 22:13:48,231 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-01-20 22:13:48,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:48,231 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-01-20 22:13:48,231 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-20 22:13:48,231 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-01-20 22:13:48,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-20 22:13:48,231 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:48,231 INFO L322 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:48,231 INFO L371 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:48,232 INFO L82 PathProgramCache]: Analyzing trace with hash 851384560, now seen corresponding path program 30 times [2018-01-20 22:13:48,232 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:48,232 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:48,232 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:48,233 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:48,233 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:48,239 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:49,375 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 22:13:49,375 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:49,375 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 22:13:49,380 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:13:49,386 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:49,388 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:49,389 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:49,390 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:49,391 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:49,392 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:49,393 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:49,394 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:49,395 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:49,396 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:49,397 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:49,398 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:49,399 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:49,400 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:49,402 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:49,403 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:49,403 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:49,405 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:49,416 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 22:13:49,437 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:49,437 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-01-20 22:13:49,437 INFO L409 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-01-20 22:13:49,437 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-01-20 22:13:49,437 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2018-01-20 22:13:49,438 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 35 states. [2018-01-20 22:13:49,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:49,504 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-01-20 22:13:49,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-20 22:13:49,504 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 48 [2018-01-20 22:13:49,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:49,505 INFO L225 Difference]: With dead ends: 59 [2018-01-20 22:13:49,505 INFO L226 Difference]: Without dead ends: 50 [2018-01-20 22:13:49,506 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=567, Invalid=693, Unknown=0, NotChecked=0, Total=1260 [2018-01-20 22:13:49,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-20 22:13:49,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-01-20 22:13:49,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-20 22:13:49,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-01-20 22:13:49,509 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-01-20 22:13:49,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:49,509 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-01-20 22:13:49,510 INFO L433 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-01-20 22:13:49,510 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-01-20 22:13:49,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-01-20 22:13:49,510 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:49,510 INFO L322 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:49,510 INFO L371 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:49,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1773299435, now seen corresponding path program 31 times [2018-01-20 22:13:49,510 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:49,510 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:49,511 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:49,511 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:49,511 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:49,520 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:49,868 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 22:13:49,868 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:49,868 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 22:13:49,873 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:49,888 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:49,901 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 22:13:49,922 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:49,922 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-01-20 22:13:49,922 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-20 22:13:49,922 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-20 22:13:49,923 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2018-01-20 22:13:49,923 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 36 states. [2018-01-20 22:13:49,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:49,961 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-01-20 22:13:49,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-01-20 22:13:49,962 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 49 [2018-01-20 22:13:49,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:49,962 INFO L225 Difference]: With dead ends: 60 [2018-01-20 22:13:49,962 INFO L226 Difference]: Without dead ends: 51 [2018-01-20 22:13:49,963 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 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 22:13:49,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-20 22:13:49,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-01-20 22:13:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-01-20 22:13:49,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-01-20 22:13:49,965 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-01-20 22:13:49,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:49,965 INFO L432 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-01-20 22:13:49,965 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-20 22:13:49,965 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-01-20 22:13:49,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-01-20 22:13:49,966 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:49,966 INFO L322 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:49,966 INFO L371 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:49,966 INFO L82 PathProgramCache]: Analyzing trace with hash 287889488, now seen corresponding path program 32 times [2018-01-20 22:13:49,966 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:49,967 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:49,967 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:49,967 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:49,968 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:49,977 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:50,331 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 22:13:50,331 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:50,331 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 22:13:50,336 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:50,343 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:50,350 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:50,351 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:50,353 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:50,366 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 22:13:50,386 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:50,386 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-01-20 22:13:50,386 INFO L409 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-01-20 22:13:50,387 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-01-20 22:13:50,387 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2018-01-20 22:13:50,387 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 37 states. [2018-01-20 22:13:50,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:50,441 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-01-20 22:13:50,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-01-20 22:13:50,441 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 50 [2018-01-20 22:13:50,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:50,442 INFO L225 Difference]: With dead ends: 61 [2018-01-20 22:13:50,442 INFO L226 Difference]: Without dead ends: 52 [2018-01-20 22:13:50,443 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 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 22:13:50,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-01-20 22:13:50,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-01-20 22:13:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-20 22:13:50,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-01-20 22:13:50,446 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-01-20 22:13:50,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:50,446 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-01-20 22:13:50,446 INFO L433 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-01-20 22:13:50,447 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-01-20 22:13:50,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-01-20 22:13:50,447 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:50,447 INFO L322 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:50,447 INFO L371 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:50,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1484821387, now seen corresponding path program 33 times [2018-01-20 22:13:50,448 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:50,448 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:50,448 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:50,449 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:50,449 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:50,458 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:50,875 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 22:13:50,875 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:50,875 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 22:13:50,880 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:13:50,887 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:50,889 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:50,890 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:50,891 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:50,892 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:50,893 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:50,895 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:50,896 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:50,897 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:50,898 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:50,899 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:50,900 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:50,901 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:50,903 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:50,904 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:50,905 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:50,906 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:50,907 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:50,908 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:50,909 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:50,924 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 22:13:50,945 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:50,945 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-01-20 22:13:50,945 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-01-20 22:13:50,945 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-01-20 22:13:50,946 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2018-01-20 22:13:50,946 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 38 states. [2018-01-20 22:13:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:50,985 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-01-20 22:13:50,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-01-20 22:13:50,985 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 51 [2018-01-20 22:13:50,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:50,986 INFO L225 Difference]: With dead ends: 62 [2018-01-20 22:13:50,986 INFO L226 Difference]: Without dead ends: 53 [2018-01-20 22:13:50,987 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 51 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 22:13:50,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-01-20 22:13:50,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-01-20 22:13:50,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-20 22:13:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-01-20 22:13:50,990 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-01-20 22:13:50,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:50,990 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-01-20 22:13:50,990 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-01-20 22:13:50,991 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-01-20 22:13:50,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-20 22:13:50,991 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:50,991 INFO L322 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:50,991 INFO L371 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:50,991 INFO L82 PathProgramCache]: Analyzing trace with hash -64995408, now seen corresponding path program 34 times [2018-01-20 22:13:50,991 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:50,992 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:50,992 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:50,992 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:50,992 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:50,999 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:51,379 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 22:13:51,379 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:51,379 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 22:13:51,384 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:13:51,400 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:51,402 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:51,415 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 22:13:51,435 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:51,435 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-01-20 22:13:51,435 INFO L409 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-01-20 22:13:51,436 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-01-20 22:13:51,436 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2018-01-20 22:13:51,436 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 39 states. [2018-01-20 22:13:51,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:51,482 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-01-20 22:13:51,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-01-20 22:13:51,482 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 52 [2018-01-20 22:13:51,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:51,483 INFO L225 Difference]: With dead ends: 63 [2018-01-20 22:13:51,483 INFO L226 Difference]: Without dead ends: 54 [2018-01-20 22:13:51,483 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=709, Invalid=851, Unknown=0, NotChecked=0, Total=1560 [2018-01-20 22:13:51,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-20 22:13:51,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-01-20 22:13:51,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-20 22:13:51,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-01-20 22:13:51,486 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-01-20 22:13:51,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:51,486 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-01-20 22:13:51,486 INFO L433 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-01-20 22:13:51,486 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-01-20 22:13:51,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-01-20 22:13:51,487 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:51,487 INFO L322 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:51,487 INFO L371 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:51,487 INFO L82 PathProgramCache]: Analyzing trace with hash -864675797, now seen corresponding path program 35 times [2018-01-20 22:13:51,487 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:51,487 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:51,488 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:51,488 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:51,488 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:51,497 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:51,954 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 22:13:51,954 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:51,954 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 22:13:51,959 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:13:51,963 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:51,964 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:51,964 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:51,965 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:51,966 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:51,967 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:51,967 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:51,968 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:51,969 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:51,970 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:51,970 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:51,971 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:51,972 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:51,973 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:51,974 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:51,975 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:51,976 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:51,977 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:51,981 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:51,982 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:51,985 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:52,000 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 22:13:52,021 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:52,022 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-01-20 22:13:52,022 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-20 22:13:52,022 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-20 22:13:52,023 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2018-01-20 22:13:52,023 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 40 states. [2018-01-20 22:13:52,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:52,075 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-01-20 22:13:52,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-01-20 22:13:52,075 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 53 [2018-01-20 22:13:52,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:52,076 INFO L225 Difference]: With dead ends: 64 [2018-01-20 22:13:52,076 INFO L226 Difference]: Without dead ends: 55 [2018-01-20 22:13:52,077 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=747, Invalid=893, Unknown=0, NotChecked=0, Total=1640 [2018-01-20 22:13:52,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-20 22:13:52,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-01-20 22:13:52,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-20 22:13:52,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-01-20 22:13:52,080 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-01-20 22:13:52,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:52,081 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-01-20 22:13:52,081 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-20 22:13:52,081 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-01-20 22:13:52,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-01-20 22:13:52,081 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:52,082 INFO L322 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:52,082 INFO L371 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:52,082 INFO L82 PathProgramCache]: Analyzing trace with hash 115035920, now seen corresponding path program 36 times [2018-01-20 22:13:52,082 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:52,082 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:52,083 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:52,083 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:52,083 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:52,094 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:52,759 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 22:13:52,759 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:52,760 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 22:13:52,770 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:13:52,778 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:52,783 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:52,784 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:52,785 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:52,786 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:52,788 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:52,789 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:52,790 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:52,791 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:52,792 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:52,794 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:52,795 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:52,797 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:52,798 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:52,802 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:52,804 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:52,810 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:52,811 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:52,819 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:52,821 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:52,823 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:52,890 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 22:13:52,922 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:52,923 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-01-20 22:13:52,923 INFO L409 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-01-20 22:13:52,923 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-01-20 22:13:52,924 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2018-01-20 22:13:52,924 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 41 states. [2018-01-20 22:13:52,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:52,978 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-01-20 22:13:52,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-01-20 22:13:52,979 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 54 [2018-01-20 22:13:52,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:52,979 INFO L225 Difference]: With dead ends: 65 [2018-01-20 22:13:52,979 INFO L226 Difference]: Without dead ends: 56 [2018-01-20 22:13:52,980 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 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 22:13:52,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-20 22:13:52,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-01-20 22:13:52,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-20 22:13:52,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-01-20 22:13:52,983 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-01-20 22:13:52,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:52,983 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-01-20 22:13:52,983 INFO L433 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-01-20 22:13:52,983 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-01-20 22:13:52,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-01-20 22:13:52,983 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:52,984 INFO L322 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:52,984 INFO L371 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:52,984 INFO L82 PathProgramCache]: Analyzing trace with hash 421328075, now seen corresponding path program 37 times [2018-01-20 22:13:52,984 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:52,984 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:52,985 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:52,985 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:52,985 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:52,993 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:53,459 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 22:13:53,459 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:53,459 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 22:13:53,465 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:53,484 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:53,508 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 22:13:53,539 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:53,539 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-01-20 22:13:53,539 INFO L409 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-01-20 22:13:53,540 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-01-20 22:13:53,540 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2018-01-20 22:13:53,540 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 42 states. [2018-01-20 22:13:53,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:53,597 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-01-20 22:13:53,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-01-20 22:13:53,598 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 55 [2018-01-20 22:13:53,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:53,598 INFO L225 Difference]: With dead ends: 66 [2018-01-20 22:13:53,598 INFO L226 Difference]: Without dead ends: 57 [2018-01-20 22:13:53,599 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=826, Invalid=980, Unknown=0, NotChecked=0, Total=1806 [2018-01-20 22:13:53,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-20 22:13:53,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-01-20 22:13:53,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-20 22:13:53,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-01-20 22:13:53,601 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-01-20 22:13:53,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:53,601 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-01-20 22:13:53,601 INFO L433 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-01-20 22:13:53,601 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-01-20 22:13:53,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-20 22:13:53,602 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:53,602 INFO L322 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:53,602 INFO L371 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:53,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1326450288, now seen corresponding path program 38 times [2018-01-20 22:13:53,602 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:53,602 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:53,603 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:53,603 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:53,603 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:53,611 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:54,216 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 22:13:54,217 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:54,217 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 22:13:54,224 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:54,233 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:54,240 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:54,242 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:54,244 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:54,257 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 22:13:54,278 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:54,278 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-01-20 22:13:54,278 INFO L409 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-01-20 22:13:54,279 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-01-20 22:13:54,279 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2018-01-20 22:13:54,279 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 43 states. [2018-01-20 22:13:54,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:54,330 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-01-20 22:13:54,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-01-20 22:13:54,331 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 56 [2018-01-20 22:13:54,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:54,331 INFO L225 Difference]: With dead ends: 67 [2018-01-20 22:13:54,331 INFO L226 Difference]: Without dead ends: 58 [2018-01-20 22:13:54,332 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=867, Invalid=1025, Unknown=0, NotChecked=0, Total=1892 [2018-01-20 22:13:54,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-01-20 22:13:54,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-01-20 22:13:54,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-20 22:13:54,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-01-20 22:13:54,334 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-01-20 22:13:54,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:54,334 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-01-20 22:13:54,334 INFO L433 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-01-20 22:13:54,334 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-01-20 22:13:54,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-01-20 22:13:54,335 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:54,335 INFO L322 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:54,335 INFO L371 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:54,335 INFO L82 PathProgramCache]: Analyzing trace with hash -679532181, now seen corresponding path program 39 times [2018-01-20 22:13:54,335 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:54,335 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:54,336 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:54,336 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:54,336 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:54,344 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:54,844 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 22:13:54,844 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:54,844 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 22:13:54,849 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:13:54,857 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,859 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,860 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,861 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,862 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,863 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,864 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,865 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,866 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,867 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,868 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,869 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,870 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,871 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,872 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,874 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,875 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,876 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,877 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,879 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,880 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:54,880 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:54,882 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:54,895 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 22:13:54,915 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:54,915 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-01-20 22:13:54,916 INFO L409 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-01-20 22:13:54,916 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-01-20 22:13:54,916 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2018-01-20 22:13:54,916 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 44 states. [2018-01-20 22:13:54,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:54,961 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-01-20 22:13:54,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-01-20 22:13:54,961 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 57 [2018-01-20 22:13:54,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:54,962 INFO L225 Difference]: With dead ends: 68 [2018-01-20 22:13:54,962 INFO L226 Difference]: Without dead ends: 59 [2018-01-20 22:13:54,962 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=909, Invalid=1071, Unknown=0, NotChecked=0, Total=1980 [2018-01-20 22:13:54,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-20 22:13:54,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-01-20 22:13:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-01-20 22:13:54,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-01-20 22:13:54,965 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-01-20 22:13:54,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:54,965 INFO L432 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-01-20 22:13:54,965 INFO L433 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-01-20 22:13:54,965 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-01-20 22:13:54,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-01-20 22:13:54,966 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:54,966 INFO L322 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:54,966 INFO L371 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:54,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1559520720, now seen corresponding path program 40 times [2018-01-20 22:13:54,966 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:54,966 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:54,967 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:54,967 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:54,967 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:54,978 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:55,513 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 22:13:55,513 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:55,513 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 22:13:55,518 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:13:55,534 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:55,536 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:55,550 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 22:13:55,576 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:55,577 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-01-20 22:13:55,577 INFO L409 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-01-20 22:13:55,577 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-01-20 22:13:55,577 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2018-01-20 22:13:55,578 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 45 states. [2018-01-20 22:13:55,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:55,620 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-01-20 22:13:55,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-01-20 22:13:55,620 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 58 [2018-01-20 22:13:55,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:55,621 INFO L225 Difference]: With dead ends: 69 [2018-01-20 22:13:55,621 INFO L226 Difference]: Without dead ends: 60 [2018-01-20 22:13:55,621 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=952, Invalid=1118, Unknown=0, NotChecked=0, Total=2070 [2018-01-20 22:13:55,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-20 22:13:55,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-01-20 22:13:55,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-20 22:13:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-01-20 22:13:55,624 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-01-20 22:13:55,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:55,624 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-01-20 22:13:55,624 INFO L433 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-01-20 22:13:55,624 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-01-20 22:13:55,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-01-20 22:13:55,624 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:55,624 INFO L322 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:55,625 INFO L371 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:55,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2044283381, now seen corresponding path program 41 times [2018-01-20 22:13:55,625 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:55,625 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:55,625 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:55,625 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:55,625 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:55,635 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:56,199 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 22:13:56,199 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:56,199 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 22:13:56,207 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:13:56,212 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,212 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,213 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,214 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,215 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,215 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,216 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,217 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,218 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,219 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,220 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,221 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,222 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,222 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,223 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,224 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,225 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,226 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,227 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,228 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,230 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,233 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:56,235 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:56,237 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:56,251 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 22:13:56,273 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:56,273 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-01-20 22:13:56,273 INFO L409 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-01-20 22:13:56,274 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-01-20 22:13:56,274 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2018-01-20 22:13:56,274 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 46 states. [2018-01-20 22:13:56,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:56,341 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-01-20 22:13:56,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-01-20 22:13:56,341 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 59 [2018-01-20 22:13:56,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:56,342 INFO L225 Difference]: With dead ends: 70 [2018-01-20 22:13:56,342 INFO L226 Difference]: Without dead ends: 61 [2018-01-20 22:13:56,342 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 59 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 22:13:56,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-20 22:13:56,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-01-20 22:13:56,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-01-20 22:13:56,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-01-20 22:13:56,344 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-01-20 22:13:56,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:56,345 INFO L432 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-01-20 22:13:56,345 INFO L433 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-01-20 22:13:56,345 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-01-20 22:13:56,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-01-20 22:13:56,345 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:56,345 INFO L322 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:56,345 INFO L371 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:56,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2093060816, now seen corresponding path program 42 times [2018-01-20 22:13:56,346 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:56,346 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:56,346 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:56,347 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:56,347 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:56,358 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:56,971 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 22:13:56,971 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:56,971 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 22:13:56,976 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:13:56,984 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:56,986 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:56,987 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:56,988 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:56,989 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:56,990 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:56,991 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:56,992 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:56,993 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:56,994 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:56,996 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:56,997 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:56,998 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:56,999 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:57,000 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:57,001 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:57,003 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:57,004 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:57,005 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:57,007 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:57,008 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:57,010 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:13:57,011 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:57,013 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:57,027 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 22:13:57,059 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:57,059 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-01-20 22:13:57,059 INFO L409 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-01-20 22:13:57,059 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-01-20 22:13:57,060 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2018-01-20 22:13:57,060 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 47 states. [2018-01-20 22:13:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:57,108 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-01-20 22:13:57,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-01-20 22:13:57,108 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 60 [2018-01-20 22:13:57,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:57,109 INFO L225 Difference]: With dead ends: 71 [2018-01-20 22:13:57,109 INFO L226 Difference]: Without dead ends: 62 [2018-01-20 22:13:57,109 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 60 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 22:13:57,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-01-20 22:13:57,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-01-20 22:13:57,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-01-20 22:13:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-01-20 22:13:57,112 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-01-20 22:13:57,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:57,112 INFO L432 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-01-20 22:13:57,112 INFO L433 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-01-20 22:13:57,112 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-01-20 22:13:57,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-01-20 22:13:57,112 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:57,112 INFO L322 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:57,112 INFO L371 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:57,113 INFO L82 PathProgramCache]: Analyzing trace with hash 689805995, now seen corresponding path program 43 times [2018-01-20 22:13:57,113 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:57,113 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:57,113 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:57,113 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:57,113 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:57,120 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:57,675 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 22:13:57,675 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:57,675 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 22:13:57,681 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:57,699 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:57,713 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 22:13:57,733 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:57,733 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-01-20 22:13:57,733 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-01-20 22:13:57,734 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-01-20 22:13:57,734 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2018-01-20 22:13:57,734 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 48 states. [2018-01-20 22:13:57,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:57,782 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-01-20 22:13:57,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-01-20 22:13:57,782 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 61 [2018-01-20 22:13:57,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:57,783 INFO L225 Difference]: With dead ends: 72 [2018-01-20 22:13:57,783 INFO L226 Difference]: Without dead ends: 63 [2018-01-20 22:13:57,784 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1087, Invalid=1265, Unknown=0, NotChecked=0, Total=2352 [2018-01-20 22:13:57,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-01-20 22:13:57,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-01-20 22:13:57,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-01-20 22:13:57,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-01-20 22:13:57,787 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-01-20 22:13:57,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:57,787 INFO L432 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-01-20 22:13:57,787 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-01-20 22:13:57,787 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-01-20 22:13:57,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-01-20 22:13:57,787 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:57,787 INFO L322 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:57,787 INFO L371 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:57,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1059331216, now seen corresponding path program 44 times [2018-01-20 22:13:57,788 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:57,788 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:57,788 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:57,788 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:13:57,788 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:57,797 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:58,386 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 22:13:58,387 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:58,387 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 22:13:58,391 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:13:58,399 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:58,408 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:13:58,410 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:58,412 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:58,425 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 22:13:58,445 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:58,445 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2018-01-20 22:13:58,446 INFO L409 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-01-20 22:13:58,446 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-01-20 22:13:58,446 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2018-01-20 22:13:58,446 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 49 states. [2018-01-20 22:13:58,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:58,544 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-01-20 22:13:58,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-01-20 22:13:58,544 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 62 [2018-01-20 22:13:58,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:58,545 INFO L225 Difference]: With dead ends: 73 [2018-01-20 22:13:58,545 INFO L226 Difference]: Without dead ends: 64 [2018-01-20 22:13:58,545 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 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 22:13:58,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-01-20 22:13:58,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-01-20 22:13:58,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-01-20 22:13:58,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-01-20 22:13:58,549 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-01-20 22:13:58,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:58,550 INFO L432 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-01-20 22:13:58,550 INFO L433 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-01-20 22:13:58,550 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-01-20 22:13:58,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-01-20 22:13:58,550 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:58,550 INFO L322 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:58,551 INFO L371 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:58,551 INFO L82 PathProgramCache]: Analyzing trace with hash -370288821, now seen corresponding path program 45 times [2018-01-20 22:13:58,551 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:58,551 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:58,552 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:58,552 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:58,552 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:58,562 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:13:59,241 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 22:13:59,241 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:13:59,241 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 22:13:59,248 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:13:59,255 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,257 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,257 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,258 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,259 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,260 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,261 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,262 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,264 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,265 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,266 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,267 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,268 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,269 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,270 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,271 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,273 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,274 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,275 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,277 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,278 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,279 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,281 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,282 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:13:59,282 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:13:59,284 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:13:59,300 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 22:13:59,320 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:13:59,320 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-01-20 22:13:59,320 INFO L409 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-01-20 22:13:59,320 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-01-20 22:13:59,321 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2018-01-20 22:13:59,321 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 50 states. [2018-01-20 22:13:59,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:13:59,377 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-01-20 22:13:59,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-01-20 22:13:59,377 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 63 [2018-01-20 22:13:59,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:13:59,377 INFO L225 Difference]: With dead ends: 74 [2018-01-20 22:13:59,377 INFO L226 Difference]: Without dead ends: 65 [2018-01-20 22:13:59,378 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 63 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 22:13:59,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-01-20 22:13:59,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-01-20 22:13:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-01-20 22:13:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-01-20 22:13:59,381 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-01-20 22:13:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:13:59,381 INFO L432 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-01-20 22:13:59,381 INFO L433 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-01-20 22:13:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-01-20 22:13:59,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-01-20 22:13:59,382 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:13:59,382 INFO L322 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:13:59,382 INFO L371 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:13:59,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1738837008, now seen corresponding path program 46 times [2018-01-20 22:13:59,382 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:13:59,382 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:13:59,383 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:59,383 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:13:59,383 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:13:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:13:59,390 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:00,030 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 22:14:00,031 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:00,031 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 22:14:00,035 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:14:00,054 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:00,056 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:00,070 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 22:14:00,089 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:00,090 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2018-01-20 22:14:00,090 INFO L409 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-01-20 22:14:00,090 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-01-20 22:14:00,090 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2018-01-20 22:14:00,090 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 51 states. [2018-01-20 22:14:00,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:00,153 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-01-20 22:14:00,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-01-20 22:14:00,153 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 64 [2018-01-20 22:14:00,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:00,153 INFO L225 Difference]: With dead ends: 75 [2018-01-20 22:14:00,153 INFO L226 Difference]: Without dead ends: 66 [2018-01-20 22:14:00,154 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 64 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 22:14:00,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-01-20 22:14:00,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-01-20 22:14:00,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-20 22:14:00,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-01-20 22:14:00,156 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-01-20 22:14:00,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:00,156 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-01-20 22:14:00,157 INFO L433 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-01-20 22:14:00,157 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-01-20 22:14:00,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-01-20 22:14:00,157 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:00,157 INFO L322 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:00,157 INFO L371 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:00,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1214157845, now seen corresponding path program 47 times [2018-01-20 22:14:00,158 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:00,158 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:00,158 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:00,158 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:00,159 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:00,170 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:01,216 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 22:14:01,216 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:01,216 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 22:14:01,221 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:14:01,226 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,232 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,234 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,242 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,243 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,244 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,245 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,246 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,247 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,248 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,249 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,250 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,252 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,253 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,254 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,255 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,257 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,258 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,260 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,261 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,263 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,271 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,273 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,274 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,280 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:01,281 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:01,285 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:01,307 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 22:14:01,327 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:01,327 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-01-20 22:14:01,327 INFO L409 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-01-20 22:14:01,328 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-01-20 22:14:01,328 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2018-01-20 22:14:01,328 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 52 states. [2018-01-20 22:14:01,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:01,385 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-01-20 22:14:01,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-01-20 22:14:01,386 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 65 [2018-01-20 22:14:01,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:01,386 INFO L225 Difference]: With dead ends: 76 [2018-01-20 22:14:01,386 INFO L226 Difference]: Without dead ends: 67 [2018-01-20 22:14:01,387 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1281, Invalid=1475, Unknown=0, NotChecked=0, Total=2756 [2018-01-20 22:14:01,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-01-20 22:14:01,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-01-20 22:14:01,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-01-20 22:14:01,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-01-20 22:14:01,389 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-01-20 22:14:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:01,389 INFO L432 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-01-20 22:14:01,389 INFO L433 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-01-20 22:14:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-01-20 22:14:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-01-20 22:14:01,390 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:01,390 INFO L322 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:01,390 INFO L371 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:01,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2128972976, now seen corresponding path program 48 times [2018-01-20 22:14:01,390 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:01,390 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:01,390 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:01,391 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:01,391 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:01,399 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 22:14:02,066 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:02,066 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 22:14:02,073 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:14:02,080 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,082 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,083 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,084 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,085 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,086 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,087 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,088 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,089 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,090 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,091 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,092 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,094 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,095 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,096 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,097 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,098 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,099 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,101 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,102 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,103 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,104 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,106 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,107 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,108 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:02,109 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:02,111 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:02,130 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 22:14:02,150 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:02,151 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2018-01-20 22:14:02,151 INFO L409 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-01-20 22:14:02,151 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-01-20 22:14:02,152 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2018-01-20 22:14:02,152 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 53 states. [2018-01-20 22:14:02,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:02,210 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-01-20 22:14:02,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-01-20 22:14:02,210 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 66 [2018-01-20 22:14:02,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:02,211 INFO L225 Difference]: With dead ends: 77 [2018-01-20 22:14:02,211 INFO L226 Difference]: Without dead ends: 68 [2018-01-20 22:14:02,212 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 66 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 22:14:02,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-01-20 22:14:02,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-01-20 22:14:02,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-01-20 22:14:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-01-20 22:14:02,214 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-01-20 22:14:02,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:02,214 INFO L432 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-01-20 22:14:02,214 INFO L433 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-01-20 22:14:02,215 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-01-20 22:14:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-01-20 22:14:02,215 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:02,215 INFO L322 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:02,215 INFO L371 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:02,215 INFO L82 PathProgramCache]: Analyzing trace with hash -423470965, now seen corresponding path program 49 times [2018-01-20 22:14:02,215 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:02,215 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:02,216 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:02,216 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:02,216 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:02,223 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:02,931 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 22:14:02,931 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:02,931 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 22:14:02,936 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:02,956 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:02,973 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 22:14:02,994 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:02,994 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-01-20 22:14:02,994 INFO L409 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-01-20 22:14:02,995 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-01-20 22:14:02,995 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2018-01-20 22:14:02,995 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 54 states. [2018-01-20 22:14:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:03,110 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-01-20 22:14:03,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-01-20 22:14:03,111 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 67 [2018-01-20 22:14:03,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:03,111 INFO L225 Difference]: With dead ends: 78 [2018-01-20 22:14:03,111 INFO L226 Difference]: Without dead ends: 69 [2018-01-20 22:14:03,112 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1384, Invalid=1586, Unknown=0, NotChecked=0, Total=2970 [2018-01-20 22:14:03,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-20 22:14:03,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-01-20 22:14:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-01-20 22:14:03,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-01-20 22:14:03,114 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-01-20 22:14:03,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:03,115 INFO L432 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-01-20 22:14:03,115 INFO L433 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-01-20 22:14:03,115 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-01-20 22:14:03,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-01-20 22:14:03,115 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:03,115 INFO L322 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:03,115 INFO L371 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:03,115 INFO L82 PathProgramCache]: Analyzing trace with hash 907483824, now seen corresponding path program 50 times [2018-01-20 22:14:03,115 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:03,115 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:03,116 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:03,116 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:03,116 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:03,125 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:04,238 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 22:14:04,238 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:04,271 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 22:14:04,276 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:14:04,284 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:04,293 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:04,295 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:04,298 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:04,321 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 22:14:04,342 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:04,342 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2018-01-20 22:14:04,343 INFO L409 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-01-20 22:14:04,343 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-01-20 22:14:04,343 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2018-01-20 22:14:04,343 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 55 states. [2018-01-20 22:14:04,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:04,456 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-01-20 22:14:04,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-01-20 22:14:04,456 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 68 [2018-01-20 22:14:04,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:04,457 INFO L225 Difference]: With dead ends: 79 [2018-01-20 22:14:04,457 INFO L226 Difference]: Without dead ends: 70 [2018-01-20 22:14:04,458 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1437, Invalid=1643, Unknown=0, NotChecked=0, Total=3080 [2018-01-20 22:14:04,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-01-20 22:14:04,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-01-20 22:14:04,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-01-20 22:14:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-01-20 22:14:04,461 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-01-20 22:14:04,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:04,462 INFO L432 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-01-20 22:14:04,462 INFO L433 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-01-20 22:14:04,462 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-01-20 22:14:04,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-01-20 22:14:04,462 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:04,463 INFO L322 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:04,463 INFO L371 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:04,463 INFO L82 PathProgramCache]: Analyzing trace with hash -782590677, now seen corresponding path program 51 times [2018-01-20 22:14:04,463 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:04,463 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:04,464 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:04,464 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:04,464 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:04,472 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:05,254 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 22:14:05,254 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:05,254 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 22:14:05,259 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:14:05,267 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,270 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,272 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,273 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,274 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,275 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,276 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,277 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,278 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,279 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,281 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,282 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,283 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,284 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,285 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,286 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,288 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,289 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,290 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,292 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,293 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,294 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,295 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,297 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,298 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,300 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,301 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:05,302 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:05,304 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:05,320 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 22:14:05,340 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:05,340 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-01-20 22:14:05,341 INFO L409 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-01-20 22:14:05,341 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-01-20 22:14:05,341 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2018-01-20 22:14:05,341 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 56 states. [2018-01-20 22:14:05,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:05,404 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-01-20 22:14:05,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-01-20 22:14:05,405 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 69 [2018-01-20 22:14:05,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:05,405 INFO L225 Difference]: With dead ends: 80 [2018-01-20 22:14:05,405 INFO L226 Difference]: Without dead ends: 71 [2018-01-20 22:14:05,406 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 69 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 22:14:05,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-01-20 22:14:05,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-01-20 22:14:05,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-01-20 22:14:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-01-20 22:14:05,408 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-01-20 22:14:05,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:05,409 INFO L432 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-01-20 22:14:05,409 INFO L433 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-01-20 22:14:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-01-20 22:14:05,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-01-20 22:14:05,409 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:05,409 INFO L322 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:05,409 INFO L371 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:05,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1635292656, now seen corresponding path program 52 times [2018-01-20 22:14:05,409 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:05,410 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:05,410 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:05,410 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:05,410 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:05,418 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:06,402 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 22:14:06,402 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:06,402 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 22:14:06,406 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:14:06,427 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:06,429 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:06,445 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 22:14:06,465 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:06,466 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2018-01-20 22:14:06,466 INFO L409 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-01-20 22:14:06,466 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-01-20 22:14:06,466 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2018-01-20 22:14:06,467 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 57 states. [2018-01-20 22:14:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:06,534 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-01-20 22:14:06,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-01-20 22:14:06,534 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 70 [2018-01-20 22:14:06,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:06,535 INFO L225 Difference]: With dead ends: 81 [2018-01-20 22:14:06,535 INFO L226 Difference]: Without dead ends: 72 [2018-01-20 22:14:06,535 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1546, Invalid=1760, Unknown=0, NotChecked=0, Total=3306 [2018-01-20 22:14:06,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-01-20 22:14:06,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-01-20 22:14:06,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-01-20 22:14:06,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-01-20 22:14:06,537 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-01-20 22:14:06,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:06,538 INFO L432 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-01-20 22:14:06,538 INFO L433 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-01-20 22:14:06,538 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-01-20 22:14:06,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-01-20 22:14:06,538 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:06,538 INFO L322 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:06,538 INFO L371 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:06,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1995717067, now seen corresponding path program 53 times [2018-01-20 22:14:06,538 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:06,539 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:06,539 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:06,539 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:06,539 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:06,548 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:07,466 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 22:14:07,466 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:07,466 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 22:14:07,471 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:14:07,476 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,477 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,478 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,479 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,480 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,483 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,484 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,485 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,486 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,486 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,487 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,488 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,489 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,490 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,491 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,492 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,492 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,493 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,494 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,495 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,496 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,498 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,499 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,500 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,501 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,502 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,503 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,507 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:07,508 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:07,511 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:07,524 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 22:14:07,543 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:07,543 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-01-20 22:14:07,543 INFO L409 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-01-20 22:14:07,543 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-01-20 22:14:07,544 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2018-01-20 22:14:07,544 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 58 states. [2018-01-20 22:14:07,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:07,628 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-01-20 22:14:07,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-01-20 22:14:07,629 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 71 [2018-01-20 22:14:07,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:07,629 INFO L225 Difference]: With dead ends: 82 [2018-01-20 22:14:07,629 INFO L226 Difference]: Without dead ends: 73 [2018-01-20 22:14:07,630 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1602, Invalid=1820, Unknown=0, NotChecked=0, Total=3422 [2018-01-20 22:14:07,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-20 22:14:07,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-01-20 22:14:07,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-01-20 22:14:07,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-01-20 22:14:07,633 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-01-20 22:14:07,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:07,633 INFO L432 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-01-20 22:14:07,633 INFO L433 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-01-20 22:14:07,634 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-01-20 22:14:07,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-01-20 22:14:07,634 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:07,634 INFO L322 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:07,635 INFO L371 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:07,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1407098512, now seen corresponding path program 54 times [2018-01-20 22:14:07,635 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:07,635 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:07,636 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:07,636 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:07,636 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:07,649 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:08,849 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 22:14:08,850 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:08,850 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 22:14:08,855 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:14:08,863 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,865 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,866 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,867 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,868 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,869 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,870 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,871 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,872 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,873 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,874 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,875 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,876 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,878 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,879 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,880 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,881 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,883 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,884 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,885 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,887 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,888 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,889 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,891 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,892 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,894 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,895 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,897 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:08,898 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:08,900 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:08,915 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 22:14:08,935 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:08,936 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2018-01-20 22:14:08,936 INFO L409 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-01-20 22:14:08,936 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-01-20 22:14:08,936 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2018-01-20 22:14:08,936 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 59 states. [2018-01-20 22:14:09,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:09,008 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-01-20 22:14:09,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-01-20 22:14:09,009 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 72 [2018-01-20 22:14:09,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:09,009 INFO L225 Difference]: With dead ends: 83 [2018-01-20 22:14:09,009 INFO L226 Difference]: Without dead ends: 74 [2018-01-20 22:14:09,010 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1659, Invalid=1881, Unknown=0, NotChecked=0, Total=3540 [2018-01-20 22:14:09,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-01-20 22:14:09,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-01-20 22:14:09,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-01-20 22:14:09,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-01-20 22:14:09,012 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-01-20 22:14:09,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:09,013 INFO L432 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-01-20 22:14:09,013 INFO L433 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-01-20 22:14:09,013 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-01-20 22:14:09,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-01-20 22:14:09,014 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:09,014 INFO L322 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:09,014 INFO L371 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:09,014 INFO L82 PathProgramCache]: Analyzing trace with hash 479800939, now seen corresponding path program 55 times [2018-01-20 22:14:09,014 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:09,014 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:09,015 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:09,015 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:09,015 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:09,029 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:10,033 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 22:14:10,034 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:10,034 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 22:14:10,045 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:10,068 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:10,083 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 22:14:10,103 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:10,104 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-01-20 22:14:10,104 INFO L409 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-01-20 22:14:10,104 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-01-20 22:14:10,104 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2018-01-20 22:14:10,104 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 60 states. [2018-01-20 22:14:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:10,163 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-01-20 22:14:10,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-01-20 22:14:10,163 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 73 [2018-01-20 22:14:10,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:10,164 INFO L225 Difference]: With dead ends: 84 [2018-01-20 22:14:10,164 INFO L226 Difference]: Without dead ends: 75 [2018-01-20 22:14:10,164 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1717, Invalid=1943, Unknown=0, NotChecked=0, Total=3660 [2018-01-20 22:14:10,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-01-20 22:14:10,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-01-20 22:14:10,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-01-20 22:14:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-01-20 22:14:10,167 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-01-20 22:14:10,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:10,167 INFO L432 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-01-20 22:14:10,167 INFO L433 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-01-20 22:14:10,167 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-01-20 22:14:10,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-01-20 22:14:10,168 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:10,168 INFO L322 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:10,168 INFO L371 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:10,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1155858224, now seen corresponding path program 56 times [2018-01-20 22:14:10,168 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:10,168 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:10,169 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:10,169 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:10,169 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:10,178 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:11,077 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 22:14:11,077 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:11,077 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 22:14:11,082 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:14:11,090 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:11,100 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:11,102 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:11,105 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:11,126 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 22:14:11,145 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:11,146 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2018-01-20 22:14:11,146 INFO L409 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-01-20 22:14:11,146 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-01-20 22:14:11,146 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2018-01-20 22:14:11,146 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 61 states. [2018-01-20 22:14:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:11,237 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-01-20 22:14:11,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-01-20 22:14:11,238 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 74 [2018-01-20 22:14:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:11,238 INFO L225 Difference]: With dead ends: 85 [2018-01-20 22:14:11,239 INFO L226 Difference]: Without dead ends: 76 [2018-01-20 22:14:11,239 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 74 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 22:14:11,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-01-20 22:14:11,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-01-20 22:14:11,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-20 22:14:11,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-01-20 22:14:11,243 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-01-20 22:14:11,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:11,243 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-01-20 22:14:11,243 INFO L433 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-01-20 22:14:11,244 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-01-20 22:14:11,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-01-20 22:14:11,244 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:11,244 INFO L322 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:11,244 INFO L371 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:11,245 INFO L82 PathProgramCache]: Analyzing trace with hash -321684725, now seen corresponding path program 57 times [2018-01-20 22:14:11,245 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:11,245 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:11,245 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:11,245 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:11,246 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:11,259 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:12,199 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 22:14:12,199 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:12,199 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 22:14:12,204 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:14:12,212 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,214 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,215 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,216 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,217 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,218 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,219 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,220 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,221 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,222 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,223 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,225 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,226 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,227 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,228 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,229 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,230 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,232 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,233 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,234 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,236 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,237 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,238 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,240 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,241 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,243 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,244 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,246 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,247 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,249 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:12,249 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:12,252 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:12,272 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 22:14:12,292 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:12,292 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-01-20 22:14:12,292 INFO L409 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-01-20 22:14:12,293 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-01-20 22:14:12,293 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2018-01-20 22:14:12,293 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 62 states. [2018-01-20 22:14:12,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:12,363 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-01-20 22:14:12,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-01-20 22:14:12,363 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 75 [2018-01-20 22:14:12,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:12,364 INFO L225 Difference]: With dead ends: 86 [2018-01-20 22:14:12,364 INFO L226 Difference]: Without dead ends: 77 [2018-01-20 22:14:12,364 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1836, Invalid=2070, Unknown=0, NotChecked=0, Total=3906 [2018-01-20 22:14:12,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-01-20 22:14:12,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-01-20 22:14:12,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-20 22:14:12,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-01-20 22:14:12,368 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-01-20 22:14:12,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:12,368 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-01-20 22:14:12,369 INFO L433 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-01-20 22:14:12,369 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-01-20 22:14:12,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-01-20 22:14:12,369 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:12,369 INFO L322 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:12,370 INFO L371 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:12,370 INFO L82 PathProgramCache]: Analyzing trace with hash -232110032, now seen corresponding path program 58 times [2018-01-20 22:14:12,370 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:12,370 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:12,371 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:12,371 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:12,371 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:12,386 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:13,661 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 22:14:13,661 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:13,661 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 22:14:13,666 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:14:13,689 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:13,691 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:13,726 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 22:14:13,747 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:13,747 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2018-01-20 22:14:13,747 INFO L409 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-01-20 22:14:13,748 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-01-20 22:14:13,748 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2018-01-20 22:14:13,748 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 63 states. [2018-01-20 22:14:13,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:13,896 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-01-20 22:14:13,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-01-20 22:14:13,896 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 76 [2018-01-20 22:14:13,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:13,897 INFO L225 Difference]: With dead ends: 87 [2018-01-20 22:14:13,897 INFO L226 Difference]: Without dead ends: 78 [2018-01-20 22:14:13,898 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1897, Invalid=2135, Unknown=0, NotChecked=0, Total=4032 [2018-01-20 22:14:13,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-01-20 22:14:13,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-01-20 22:14:13,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-01-20 22:14:13,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-01-20 22:14:13,901 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-01-20 22:14:13,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:13,902 INFO L432 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-01-20 22:14:13,902 INFO L433 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-01-20 22:14:13,902 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-01-20 22:14:13,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-01-20 22:14:13,903 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:13,903 INFO L322 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:13,903 INFO L371 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:13,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1750261845, now seen corresponding path program 59 times [2018-01-20 22:14:13,903 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:13,903 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:13,904 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:13,904 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:13,904 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:13,917 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:14,935 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 22:14:14,935 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:14,935 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 22:14:14,940 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:14:14,945 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,946 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,946 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,947 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,948 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,949 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,950 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,951 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,952 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,952 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,953 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,954 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,955 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,956 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,957 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,958 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,960 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,961 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,962 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,963 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,964 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,965 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,967 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,968 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,969 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,971 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,972 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,973 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,975 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,976 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,980 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:14,982 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:14,985 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:15,005 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 22:14:15,035 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:15,036 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-01-20 22:14:15,036 INFO L409 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-01-20 22:14:15,037 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-01-20 22:14:15,037 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2018-01-20 22:14:15,037 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 64 states. [2018-01-20 22:14:15,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:15,118 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-01-20 22:14:15,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-01-20 22:14:15,118 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 77 [2018-01-20 22:14:15,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:15,119 INFO L225 Difference]: With dead ends: 88 [2018-01-20 22:14:15,119 INFO L226 Difference]: Without dead ends: 79 [2018-01-20 22:14:15,119 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1959, Invalid=2201, Unknown=0, NotChecked=0, Total=4160 [2018-01-20 22:14:15,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-01-20 22:14:15,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-01-20 22:14:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-01-20 22:14:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-01-20 22:14:15,123 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-01-20 22:14:15,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:15,123 INFO L432 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-01-20 22:14:15,123 INFO L433 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-01-20 22:14:15,123 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-01-20 22:14:15,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-01-20 22:14:15,124 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:15,124 INFO L322 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:15,124 INFO L371 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:15,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1568327792, now seen corresponding path program 60 times [2018-01-20 22:14:15,124 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:15,125 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:15,125 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:15,125 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:15,125 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:15,140 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:16,159 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 22:14:16,159 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:16,159 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 22:14:16,165 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:14:16,173 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,174 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,175 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,176 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,177 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,178 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,179 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,180 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,181 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,182 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,183 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,184 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,186 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,187 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,188 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,189 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,190 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,192 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,193 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,194 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,196 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,197 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,198 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,200 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,201 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,203 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,204 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,206 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,207 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,209 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,210 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:16,211 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:16,213 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:16,235 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 22:14:16,255 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:16,256 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2018-01-20 22:14:16,256 INFO L409 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-01-20 22:14:16,256 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-01-20 22:14:16,257 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2018-01-20 22:14:16,257 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 65 states. [2018-01-20 22:14:16,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:16,352 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-01-20 22:14:16,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-01-20 22:14:16,352 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 78 [2018-01-20 22:14:16,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:16,353 INFO L225 Difference]: With dead ends: 89 [2018-01-20 22:14:16,353 INFO L226 Difference]: Without dead ends: 80 [2018-01-20 22:14:16,353 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2022, Invalid=2268, Unknown=0, NotChecked=0, Total=4290 [2018-01-20 22:14:16,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-01-20 22:14:16,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-01-20 22:14:16,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-01-20 22:14:16,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-01-20 22:14:16,357 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-01-20 22:14:16,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:16,358 INFO L432 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-01-20 22:14:16,358 INFO L433 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-01-20 22:14:16,358 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-01-20 22:14:16,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-01-20 22:14:16,358 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:16,359 INFO L322 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:16,359 INFO L371 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:16,359 INFO L82 PathProgramCache]: Analyzing trace with hash -223339445, now seen corresponding path program 61 times [2018-01-20 22:14:16,359 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:16,359 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:16,360 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:16,360 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:16,360 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:16,376 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:17,780 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 22:14:17,780 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:17,780 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 22:14:17,785 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:17,808 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:17,831 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 22:14:17,851 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:17,852 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-01-20 22:14:17,852 INFO L409 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-01-20 22:14:17,852 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-01-20 22:14:17,852 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2018-01-20 22:14:17,852 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 66 states. [2018-01-20 22:14:17,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:17,937 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-01-20 22:14:17,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-01-20 22:14:17,937 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 79 [2018-01-20 22:14:17,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:17,938 INFO L225 Difference]: With dead ends: 90 [2018-01-20 22:14:17,938 INFO L226 Difference]: Without dead ends: 81 [2018-01-20 22:14:17,938 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 79 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 22:14:17,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-01-20 22:14:17,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-01-20 22:14:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-01-20 22:14:17,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-01-20 22:14:17,941 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-01-20 22:14:17,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:17,941 INFO L432 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-01-20 22:14:17,941 INFO L433 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-01-20 22:14:17,941 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-01-20 22:14:17,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-01-20 22:14:17,941 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:17,941 INFO L322 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:17,941 INFO L371 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:17,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1478373648, now seen corresponding path program 62 times [2018-01-20 22:14:17,942 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:17,942 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:17,942 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:17,942 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 22:14:17,942 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:17,952 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:19,040 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 22:14:19,040 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:19,040 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 22:14:19,050 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 22:14:19,058 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:19,068 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:19,071 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:19,074 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:19,090 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 22:14:19,124 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:19,124 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2018-01-20 22:14:19,125 INFO L409 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-01-20 22:14:19,125 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-01-20 22:14:19,125 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2018-01-20 22:14:19,125 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 67 states. [2018-01-20 22:14:19,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:19,232 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-01-20 22:14:19,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-01-20 22:14:19,232 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 80 [2018-01-20 22:14:19,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:19,232 INFO L225 Difference]: With dead ends: 91 [2018-01-20 22:14:19,232 INFO L226 Difference]: Without dead ends: 82 [2018-01-20 22:14:19,233 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2151, Invalid=2405, Unknown=0, NotChecked=0, Total=4556 [2018-01-20 22:14:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-01-20 22:14:19,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-01-20 22:14:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-01-20 22:14:19,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-01-20 22:14:19,236 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-01-20 22:14:19,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:19,237 INFO L432 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-01-20 22:14:19,237 INFO L433 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-01-20 22:14:19,237 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-01-20 22:14:19,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-01-20 22:14:19,238 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:19,238 INFO L322 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:19,238 INFO L371 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:19,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1729728277, now seen corresponding path program 63 times [2018-01-20 22:14:19,238 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:19,238 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:19,239 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:19,239 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:19,239 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:19,256 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:20,547 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 22:14:20,547 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:20,547 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 22:14:20,553 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 22:14:20,562 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,564 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,565 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,566 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,567 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,568 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,569 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,570 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,571 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,572 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,573 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,574 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,575 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,576 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,577 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,579 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,580 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,581 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,582 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,584 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,585 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,586 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,588 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,589 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,590 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,592 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,593 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,595 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,596 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,598 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,600 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,601 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,603 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 22:14:20,603 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:20,605 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:20,622 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 22:14:20,655 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:20,655 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-01-20 22:14:20,655 INFO L409 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-01-20 22:14:20,656 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-01-20 22:14:20,656 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2018-01-20 22:14:20,656 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 68 states. [2018-01-20 22:14:20,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:20,743 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-01-20 22:14:20,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-01-20 22:14:20,744 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 81 [2018-01-20 22:14:20,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:20,744 INFO L225 Difference]: With dead ends: 92 [2018-01-20 22:14:20,744 INFO L226 Difference]: Without dead ends: 83 [2018-01-20 22:14:20,745 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2217, Invalid=2475, Unknown=0, NotChecked=0, Total=4692 [2018-01-20 22:14:20,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-01-20 22:14:20,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-01-20 22:14:20,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-01-20 22:14:20,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-01-20 22:14:20,748 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-01-20 22:14:20,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:20,749 INFO L432 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-01-20 22:14:20,749 INFO L433 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-01-20 22:14:20,749 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-01-20 22:14:20,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-01-20 22:14:20,749 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:20,750 INFO L322 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:20,750 INFO L371 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:20,750 INFO L82 PathProgramCache]: Analyzing trace with hash -931787184, now seen corresponding path program 64 times [2018-01-20 22:14:20,750 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:20,750 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:20,750 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:20,750 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:20,750 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:20,761 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:22,077 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 22:14:22,077 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:22,077 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 22:14:22,082 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 22:14:22,105 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:22,108 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:22,125 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 22:14:22,159 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:22,159 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2018-01-20 22:14:22,159 INFO L409 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-01-20 22:14:22,160 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-01-20 22:14:22,160 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2018-01-20 22:14:22,160 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 69 states. [2018-01-20 22:14:22,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:22,279 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-01-20 22:14:22,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-01-20 22:14:22,279 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 82 [2018-01-20 22:14:22,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:22,280 INFO L225 Difference]: With dead ends: 93 [2018-01-20 22:14:22,280 INFO L226 Difference]: Without dead ends: 84 [2018-01-20 22:14:22,280 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2284, Invalid=2546, Unknown=0, NotChecked=0, Total=4830 [2018-01-20 22:14:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-01-20 22:14:22,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-01-20 22:14:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-01-20 22:14:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-01-20 22:14:22,283 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-01-20 22:14:22,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:22,283 INFO L432 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-01-20 22:14:22,283 INFO L433 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-01-20 22:14:22,283 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-01-20 22:14:22,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-01-20 22:14:22,284 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:22,284 INFO L322 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:22,284 INFO L371 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:22,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1965417077, now seen corresponding path program 65 times [2018-01-20 22:14:22,284 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:22,284 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:22,284 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:22,285 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:22,285 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:22,295 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:23,509 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 22:14:23,509 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:23,509 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 22:14:23,514 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 22:14:23,519 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,520 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,520 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,521 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,522 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,523 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,523 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,524 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,525 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,526 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,527 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,527 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,528 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,529 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,530 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,531 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,532 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,533 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,534 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,535 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,536 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,537 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,539 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,540 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,541 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,542 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,543 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,545 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,546 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,547 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,549 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,550 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,552 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,556 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 22:14:23,558 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:23,561 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:23,581 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 22:14:23,602 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:23,602 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-01-20 22:14:23,602 INFO L409 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-01-20 22:14:23,602 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-01-20 22:14:23,603 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2018-01-20 22:14:23,603 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 70 states. [2018-01-20 22:14:23,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:23,694 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-01-20 22:14:23,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-01-20 22:14:23,694 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 83 [2018-01-20 22:14:23,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:23,694 INFO L225 Difference]: With dead ends: 94 [2018-01-20 22:14:23,694 INFO L226 Difference]: Without dead ends: 85 [2018-01-20 22:14:23,695 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 83 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 22:14:23,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-01-20 22:14:23,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-01-20 22:14:23,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-01-20 22:14:23,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-01-20 22:14:23,697 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-01-20 22:14:23,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:23,697 INFO L432 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-01-20 22:14:23,697 INFO L433 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-01-20 22:14:23,698 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-01-20 22:14:23,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-01-20 22:14:23,698 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:23,698 INFO L322 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:23,698 INFO L371 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:23,698 INFO L82 PathProgramCache]: Analyzing trace with hash 351794608, now seen corresponding path program 66 times [2018-01-20 22:14:23,698 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:23,699 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:23,699 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:23,699 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:23,699 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:23,710 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 22:14:25,064 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 22:14:25,064 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 22:14:25,064 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 22:14:25,069 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 22:14:25,077 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,078 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,079 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,080 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,081 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,082 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,083 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,085 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,086 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,087 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,088 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,089 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,090 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,091 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,092 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,094 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,095 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,096 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,097 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,099 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,100 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,101 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,103 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,104 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,105 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,107 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,108 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,109 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,111 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,112 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,114 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,115 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,117 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,118 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 22:14:25,119 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 22:14:25,122 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 22:14:25,138 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 22:14:25,158 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-20 22:14:25,158 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2018-01-20 22:14:25,158 INFO L409 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-01-20 22:14:25,159 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-01-20 22:14:25,159 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2018-01-20 22:14:25,159 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 71 states. [2018-01-20 22:14:25,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 22:14:25,240 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-01-20 22:14:25,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-01-20 22:14:25,240 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 84 [2018-01-20 22:14:25,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 22:14:25,241 INFO L225 Difference]: With dead ends: 95 [2018-01-20 22:14:25,241 INFO L226 Difference]: Without dead ends: 86 [2018-01-20 22:14:25,241 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2421, Invalid=2691, Unknown=0, NotChecked=0, Total=5112 [2018-01-20 22:14:25,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-20 22:14:25,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-01-20 22:14:25,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-20 22:14:25,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-01-20 22:14:25,243 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-01-20 22:14:25,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 22:14:25,243 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-01-20 22:14:25,244 INFO L433 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-01-20 22:14:25,244 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-01-20 22:14:25,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-01-20 22:14:25,244 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 22:14:25,244 INFO L322 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 22:14:25,244 INFO L371 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 22:14:25,244 INFO L82 PathProgramCache]: Analyzing trace with hash -829087189, now seen corresponding path program 67 times [2018-01-20 22:14:25,244 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 22:14:25,244 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 22:14:25,245 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:25,245 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 22:14:25,245 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 22:14:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 22:14:25,256 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 22:14:25,768 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-20 22:14:25,770 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 22:14:25,770 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 22:14:25,770 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 22:14:25,770 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 22:14:25,770 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 22:14:25,770 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 22:14:25,770 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 22:14:25,770 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-20 22:14:25,770 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 22:14:25,771 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-01-20 22:14:25,771 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-20 22:14:25,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 10:14:25 BoogieIcfgContainer [2018-01-20 22:14:25,772 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-20 22:14:25,773 INFO L168 Benchmark]: Toolchain (without parser) took 47719.71 ms. Allocated memory was 300.4 MB in the beginning and 857.7 MB in the end (delta: 557.3 MB). Free memory was 261.3 MB in the beginning and 294.8 MB in the end (delta: -33.5 MB). Peak memory consumption was 523.8 MB. Max. memory is 5.3 GB. [2018-01-20 22:14:25,775 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 300.4 MB. Free memory is still 266.3 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-20 22:14:25,775 INFO L168 Benchmark]: CACSL2BoogieTranslator took 165.79 ms. Allocated memory is still 300.4 MB. Free memory was 260.3 MB in the beginning and 253.2 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 5.3 GB. [2018-01-20 22:14:25,775 INFO L168 Benchmark]: Boogie Preprocessor took 27.68 ms. Allocated memory is still 300.4 MB. Free memory was 253.2 MB in the beginning and 251.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-20 22:14:25,776 INFO L168 Benchmark]: RCFGBuilder took 185.04 ms. Allocated memory is still 300.4 MB. Free memory was 251.2 MB in the beginning and 239.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 5.3 GB. [2018-01-20 22:14:25,776 INFO L168 Benchmark]: TraceAbstraction took 47334.20 ms. Allocated memory was 300.4 MB in the beginning and 857.7 MB in the end (delta: 557.3 MB). Free memory was 238.2 MB in the beginning and 294.8 MB in the end (delta: -56.6 MB). Peak memory consumption was 500.7 MB. Max. memory is 5.3 GB. [2018-01-20 22:14:25,778 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 300.4 MB. Free memory is still 266.3 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 165.79 ms. Allocated memory is still 300.4 MB. Free memory was 260.3 MB in the beginning and 253.2 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 27.68 ms. Allocated memory is still 300.4 MB. Free memory was 253.2 MB in the beginning and 251.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 185.04 ms. Allocated memory is still 300.4 MB. Free memory was 251.2 MB in the beginning and 239.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 47334.20 ms. Allocated memory was 300.4 MB in the beginning and 857.7 MB in the end (delta: 557.3 MB). Free memory was 238.2 MB in the beginning and 294.8 MB in the end (delta: -56.6 MB). Peak memory consumption was 500.7 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 22 locations, 3 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 1). Cancelled while BasicCegarLoop was analyzing trace of length 86 with TraceHistMax 67, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 43 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 22 locations, 3 error locations. TIMEOUT Result, 47.1s OverallTime, 68 OverallIterations, 67 TraceHistogramMax, 4.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1142 SDtfs, 134 SDslu, 18743 SDs, 0 SdLazy, 3744 SolverSat, 113 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5879 GetRequests, 3401 SyntacticMatches, 0 SemanticMatches, 2478 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6566 ImplicationChecksByTransitivity, 34.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=67, 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, 67 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 37.4s InterpolantComputationTime, 6816 NumberOfCodeBlocks, 6816 NumberOfCodeBlocksAsserted, 738 NumberOfCheckSat, 6683 ConstructedInterpolants, 0 QuantifiedInterpolants, 967357 SizeOfPredicates, 66 NumberOfNonLiveVariables, 10923 ConjunctsInSsa, 2409 ConjunctsInUnsatCore, 133 InterpolantComputations, 1 PerfectInterpolantSequences, 0/100232 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 25). Cancelled while IsEmpty was searching accepting run (input had 22 states). - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 22 locations, 3 error locations. TIMEOUT Result, 0.0s OverallTime, 0 OverallIterations, 0 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset3_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-20_22-14-25-786.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset3_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-20_22-14-25-786.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset3_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-20_22-14-25-786.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset3_false-valid-deref-write.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-20_22-14-25-786.csv Completed graceful shutdown