java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/memsafety/20051113-1.c_false-valid-memtrack.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 14:23:30,119 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 14:23:30,120 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 14:23:30,135 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 14:23:30,135 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 14:23:30,136 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 14:23:30,137 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 14:23:30,139 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 14:23:30,141 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 14:23:30,142 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 14:23:30,143 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 14:23:30,143 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 14:23:30,144 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 14:23:30,145 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 14:23:30,146 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 14:23:30,149 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 14:23:30,151 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 14:23:30,153 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 14:23:30,154 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 14:23:30,156 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 14:23:30,158 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-23 14:23:30,158 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-23 14:23:30,158 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-23 14:23:30,159 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-23 14:23:30,160 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-23 14:23:30,162 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-23 14:23:30,162 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-23 14:23:30,163 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-23 14:23:30,163 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-23 14:23:30,163 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 14:23:30,164 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 14:23:30,164 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-23 14:23:30,172 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 14:23:30,172 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 14:23:30,173 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 14:23:30,173 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 14:23:30,173 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 14:23:30,173 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 14:23:30,174 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 14:23:30,174 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 14:23:30,174 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 14:23:30,174 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 14:23:30,175 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 14:23:30,175 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 14:23:30,175 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 14:23:30,175 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 14:23:30,175 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 14:23:30,175 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 14:23:30,175 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 14:23:30,175 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 14:23:30,176 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 14:23:30,176 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 14:23:30,176 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 14:23:30,176 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 14:23:30,176 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 14:23:30,176 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 14:23:30,177 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 14:23:30,177 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:23:30,177 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 14:23:30,177 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 14:23:30,177 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 14:23:30,177 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 14:23:30,178 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 14:23:30,178 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 14:23:30,178 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 14:23:30,178 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 14:23:30,178 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 14:23:30,179 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 14:23:30,179 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 14:23:30,212 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 14:23:30,222 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 14:23:30,225 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 14:23:30,226 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 14:23:30,226 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 14:23:30,227 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/20051113-1.c_false-valid-memtrack.i [2018-01-23 14:23:30,400 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 14:23:30,403 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 14:23:30,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 14:23:30,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 14:23:30,409 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 14:23:30,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:23:30" (1/1) ... [2018-01-23 14:23:30,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bfb951b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:23:30, skipping insertion in model container [2018-01-23 14:23:30,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:23:30" (1/1) ... [2018-01-23 14:23:30,425 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:23:30,463 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:23:30,589 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:23:30,614 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:23:30,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:23:30 WrapperNode [2018-01-23 14:23:30,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 14:23:30,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 14:23:30,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 14:23:30,624 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 14:23:30,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:23:30" (1/1) ... [2018-01-23 14:23:30,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:23:30" (1/1) ... [2018-01-23 14:23:30,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:23:30" (1/1) ... [2018-01-23 14:23:30,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:23:30" (1/1) ... [2018-01-23 14:23:30,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:23:30" (1/1) ... [2018-01-23 14:23:30,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:23:30" (1/1) ... [2018-01-23 14:23:30,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:23:30" (1/1) ... [2018-01-23 14:23:30,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 14:23:30,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 14:23:30,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 14:23:30,663 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 14:23:30,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:23:30" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:23:30,709 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 14:23:30,709 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 14:23:30,709 INFO L136 BoogieDeclarations]: Found implementation of procedure Sum [2018-01-23 14:23:30,710 INFO L136 BoogieDeclarations]: Found implementation of procedure Sum2 [2018-01-23 14:23:30,710 INFO L136 BoogieDeclarations]: Found implementation of procedure dummy_abort [2018-01-23 14:23:30,710 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 14:23:30,710 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-23 14:23:30,710 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-23 14:23:30,710 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 14:23:30,710 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 14:23:30,710 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 14:23:30,710 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-01-23 14:23:30,710 INFO L136 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-01-23 14:23:30,711 INFO L128 BoogieDeclarations]: Found specification of procedure memset [2018-01-23 14:23:30,711 INFO L128 BoogieDeclarations]: Found specification of procedure Sum [2018-01-23 14:23:30,711 INFO L128 BoogieDeclarations]: Found specification of procedure Sum2 [2018-01-23 14:23:30,711 INFO L128 BoogieDeclarations]: Found specification of procedure dummy_abort [2018-01-23 14:23:30,711 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 14:23:30,711 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 14:23:30,711 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 14:23:30,924 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 14:23:30,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:23:30 BoogieIcfgContainer [2018-01-23 14:23:30,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 14:23:30,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-23 14:23:30,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-23 14:23:30,927 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-23 14:23:30,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 02:23:30" (1/3) ... [2018-01-23 14:23:30,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6160c8fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:23:30, skipping insertion in model container [2018-01-23 14:23:30,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:23:30" (2/3) ... [2018-01-23 14:23:30,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6160c8fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:23:30, skipping insertion in model container [2018-01-23 14:23:30,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:23:30" (3/3) ... [2018-01-23 14:23:30,930 INFO L105 eAbstractionObserver]: Analyzing ICFG 20051113-1.c_false-valid-memtrack.i [2018-01-23 14:23:30,936 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-23 14:23:30,942 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-01-23 14:23:30,988 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:23:30,988 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:23:30,988 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:23:30,988 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:23:30,989 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:23:30,989 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:23:30,989 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:23:30,989 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == Sum2Err0EnsuresViolation======== [2018-01-23 14:23:30,990 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:23:31,011 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2018-01-23 14:23:31,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-23 14:23:31,016 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:31,017 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:31,017 INFO L371 AbstractCegarLoop]: === Iteration 1 === [Sum2Err0EnsuresViolation]=== [2018-01-23 14:23:31,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1865297126, now seen corresponding path program 1 times [2018-01-23 14:23:31,024 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:31,025 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:31,066 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:31,066 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:31,066 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:31,126 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:23:31,181 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:23:31,182 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:23:31,184 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:23:31,200 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:23:31,201 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:23:31,203 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 2 states. [2018-01-23 14:23:31,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:31,299 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2018-01-23 14:23:31,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:23:31,300 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2018-01-23 14:23:31,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:31,308 INFO L225 Difference]: With dead ends: 88 [2018-01-23 14:23:31,308 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:23:31,313 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:23:31,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:23:31,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:23:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:23:31,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:23:31,332 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2018-01-23 14:23:31,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:31,332 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:23:31,333 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:23:31,333 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:23:31,333 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:23:31,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-01-23 14:23:31,387 INFO L401 ceAbstractionStarter]: For program point Sum2FINAL(lines 658 666) no Hoare annotation was computed. [2018-01-23 14:23:31,387 INFO L401 ceAbstractionStarter]: For program point Sum2Err0EnsuresViolation(line 657) no Hoare annotation was computed. [2018-01-23 14:23:31,387 INFO L401 ceAbstractionStarter]: For program point L663(line 663) no Hoare annotation was computed. [2018-01-23 14:23:31,388 INFO L404 ceAbstractionStarter]: At program point L662''''(lines 662 664) the Hoare annotation is: true [2018-01-23 14:23:31,388 INFO L401 ceAbstractionStarter]: For program point L662(line 662) no Hoare annotation was computed. [2018-01-23 14:23:31,388 INFO L401 ceAbstractionStarter]: For program point L663'(line 663) no Hoare annotation was computed. [2018-01-23 14:23:31,388 INFO L401 ceAbstractionStarter]: For program point L662'(line 662) no Hoare annotation was computed. [2018-01-23 14:23:31,388 INFO L401 ceAbstractionStarter]: For program point L662'''''(lines 662 664) no Hoare annotation was computed. [2018-01-23 14:23:31,388 INFO L401 ceAbstractionStarter]: For program point L662'''(lines 662 664) no Hoare annotation was computed. [2018-01-23 14:23:31,388 INFO L404 ceAbstractionStarter]: At program point Sum2ENTRY(lines 658 666) the Hoare annotation is: true [2018-01-23 14:23:31,388 INFO L401 ceAbstractionStarter]: For program point Sum2EXIT(lines 658 666) no Hoare annotation was computed. [2018-01-23 14:23:31,389 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initErr0EnsuresViolation(lines 1 686) no Hoare annotation was computed. [2018-01-23 14:23:31,389 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 686) no Hoare annotation was computed. [2018-01-23 14:23:31,389 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 686) the Hoare annotation is: true [2018-01-23 14:23:31,389 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 686) no Hoare annotation was computed. [2018-01-23 14:23:31,389 INFO L404 ceAbstractionStarter]: At program point #Ultimate.C_memsetENTRY(line -1) the Hoare annotation is: true [2018-01-23 14:23:31,389 INFO L404 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-01-23 14:23:31,390 INFO L401 ceAbstractionStarter]: For program point #Ultimate.C_memsetFINAL(line -1) no Hoare annotation was computed. [2018-01-23 14:23:31,390 INFO L401 ceAbstractionStarter]: For program point #Ultimate.C_memsetEXIT(line -1) no Hoare annotation was computed. [2018-01-23 14:23:31,390 INFO L404 ceAbstractionStarter]: At program point dummy_abortFINAL(lines 667 669) the Hoare annotation is: true [2018-01-23 14:23:31,390 INFO L401 ceAbstractionStarter]: For program point dummy_abortEXIT(lines 667 669) no Hoare annotation was computed. [2018-01-23 14:23:31,390 INFO L401 ceAbstractionStarter]: For program point dummy_abortErr0EnsuresViolation(lines 667 669) no Hoare annotation was computed. [2018-01-23 14:23:31,390 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 686) the Hoare annotation is: true [2018-01-23 14:23:31,390 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 686) no Hoare annotation was computed. [2018-01-23 14:23:31,391 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 686) the Hoare annotation is: true [2018-01-23 14:23:31,391 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startErr0EnsuresViolation(lines 1 686) no Hoare annotation was computed. [2018-01-23 14:23:31,391 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 686) no Hoare annotation was computed. [2018-01-23 14:23:31,391 INFO L401 ceAbstractionStarter]: For program point L652'''(lines 652 654) no Hoare annotation was computed. [2018-01-23 14:23:31,391 INFO L401 ceAbstractionStarter]: For program point L652(line 652) no Hoare annotation was computed. [2018-01-23 14:23:31,391 INFO L401 ceAbstractionStarter]: For program point L652'''''(lines 652 654) no Hoare annotation was computed. [2018-01-23 14:23:31,392 INFO L401 ceAbstractionStarter]: For program point SumEXIT(lines 648 656) no Hoare annotation was computed. [2018-01-23 14:23:31,392 INFO L401 ceAbstractionStarter]: For program point L652'(line 652) no Hoare annotation was computed. [2018-01-23 14:23:31,392 INFO L404 ceAbstractionStarter]: At program point L652''''(lines 652 654) the Hoare annotation is: true [2018-01-23 14:23:31,392 INFO L401 ceAbstractionStarter]: For program point L653(line 653) no Hoare annotation was computed. [2018-01-23 14:23:31,392 INFO L404 ceAbstractionStarter]: At program point SumENTRY(lines 648 656) the Hoare annotation is: true [2018-01-23 14:23:31,392 INFO L401 ceAbstractionStarter]: For program point SumErr0EnsuresViolation(line 647) no Hoare annotation was computed. [2018-01-23 14:23:31,393 INFO L401 ceAbstractionStarter]: For program point L653'(line 653) no Hoare annotation was computed. [2018-01-23 14:23:31,393 INFO L401 ceAbstractionStarter]: For program point SumFINAL(lines 648 656) no Hoare annotation was computed. [2018-01-23 14:23:31,393 INFO L404 ceAbstractionStarter]: At program point L681(line 681) the Hoare annotation is: true [2018-01-23 14:23:31,393 INFO L401 ceAbstractionStarter]: For program point L680(line 680) no Hoare annotation was computed. [2018-01-23 14:23:31,393 INFO L404 ceAbstractionStarter]: At program point L683(line 683) the Hoare annotation is: true [2018-01-23 14:23:31,393 INFO L401 ceAbstractionStarter]: For program point L682(line 682) no Hoare annotation was computed. [2018-01-23 14:23:31,394 INFO L401 ceAbstractionStarter]: For program point L682''(lines 682 683) no Hoare annotation was computed. [2018-01-23 14:23:31,394 INFO L401 ceAbstractionStarter]: For program point L672'(line 672) no Hoare annotation was computed. [2018-01-23 14:23:31,394 INFO L401 ceAbstractionStarter]: For program point L682'(lines 682 683) no Hoare annotation was computed. [2018-01-23 14:23:31,394 INFO L404 ceAbstractionStarter]: At program point L680'(lines 680 681) the Hoare annotation is: true [2018-01-23 14:23:31,394 INFO L401 ceAbstractionStarter]: For program point mainErr0EnsuresViolation(lines 670 686) no Hoare annotation was computed. [2018-01-23 14:23:31,394 INFO L401 ceAbstractionStarter]: For program point L674(line 674) no Hoare annotation was computed. [2018-01-23 14:23:31,394 INFO L401 ceAbstractionStarter]: For program point L673(line 673) no Hoare annotation was computed. [2018-01-23 14:23:31,395 INFO L404 ceAbstractionStarter]: At program point L672(line 672) the Hoare annotation is: true [2018-01-23 14:23:31,395 INFO L401 ceAbstractionStarter]: For program point L671(line 671) no Hoare annotation was computed. [2018-01-23 14:23:31,395 INFO L401 ceAbstractionStarter]: For program point L678(line 678) no Hoare annotation was computed. [2018-01-23 14:23:31,395 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 670 686) no Hoare annotation was computed. [2018-01-23 14:23:31,395 INFO L401 ceAbstractionStarter]: For program point L673'(line 673) no Hoare annotation was computed. [2018-01-23 14:23:31,395 INFO L401 ceAbstractionStarter]: For program point L677(line 677) no Hoare annotation was computed. [2018-01-23 14:23:31,396 INFO L401 ceAbstractionStarter]: For program point L676(line 676) no Hoare annotation was computed. [2018-01-23 14:23:31,396 INFO L401 ceAbstractionStarter]: For program point L675(line 675) no Hoare annotation was computed. [2018-01-23 14:23:31,396 INFO L404 ceAbstractionStarter]: At program point L679(line 679) the Hoare annotation is: true [2018-01-23 14:23:31,396 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 670 686) no Hoare annotation was computed. [2018-01-23 14:23:31,396 INFO L404 ceAbstractionStarter]: At program point mainENTRY(lines 670 686) the Hoare annotation is: true [2018-01-23 14:23:31,400 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:23:31,400 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:23:31,401 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:23:31,401 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:23:31,401 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:23:31,401 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:23:31,401 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:23:31,401 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-23 14:23:31,401 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:23:31,404 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2018-01-23 14:23:31,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-23 14:23:31,404 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:31,405 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-23 14:23:31,405 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-23 14:23:31,405 INFO L82 PathProgramCache]: Analyzing trace with hash 128549, now seen corresponding path program 1 times [2018-01-23 14:23:31,405 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:31,405 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:31,407 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:31,407 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:31,407 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:23:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:23:31,436 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:23:31,440 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:23:31,444 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:23:31,445 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:23:31,445 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:23:31,445 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:23:31,445 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:23:31,445 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:23:31,445 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:23:31,445 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == dummy_abortErr0EnsuresViolation======== [2018-01-23 14:23:31,445 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:23:31,447 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2018-01-23 14:23:31,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-23 14:23:31,448 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:31,448 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:31,448 INFO L371 AbstractCegarLoop]: === Iteration 1 === [dummy_abortErr0EnsuresViolation]=== [2018-01-23 14:23:31,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1195103445, now seen corresponding path program 1 times [2018-01-23 14:23:31,448 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:31,448 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:31,449 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:31,449 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:31,449 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:31,469 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:23:31,491 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:23:31,491 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:23:31,492 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:23:31,492 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:23:31,492 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:23:31,492 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 2 states. [2018-01-23 14:23:31,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:31,502 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2018-01-23 14:23:31,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:23:31,502 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2018-01-23 14:23:31,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:31,503 INFO L225 Difference]: With dead ends: 88 [2018-01-23 14:23:31,503 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:23:31,504 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:23:31,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:23:31,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:23:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:23:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:23:31,505 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2018-01-23 14:23:31,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:31,505 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:23:31,505 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:23:31,505 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:23:31,505 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:23:31,507 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:23:31,508 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:23:31,508 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:23:31,508 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:23:31,508 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:23:31,508 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:23:31,508 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:23:31,508 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-23 14:23:31,509 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:23:31,510 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2018-01-23 14:23:31,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-23 14:23:31,512 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:31,513 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:31,513 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:23:31,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1502761729, now seen corresponding path program 1 times [2018-01-23 14:23:31,513 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:31,513 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:31,514 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:31,514 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:31,514 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:31,530 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:23:31,554 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:23:31,554 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:23:31,555 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:23:31,555 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:23:31,555 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:23:31,555 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 2 states. [2018-01-23 14:23:31,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:31,562 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2018-01-23 14:23:31,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:23:31,563 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 39 [2018-01-23 14:23:31,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:31,566 INFO L225 Difference]: With dead ends: 88 [2018-01-23 14:23:31,566 INFO L226 Difference]: Without dead ends: 54 [2018-01-23 14:23:31,567 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:23:31,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-23 14:23:31,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-01-23 14:23:31,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-23 14:23:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-01-23 14:23:31,586 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 39 [2018-01-23 14:23:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:31,587 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-01-23 14:23:31,587 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:23:31,587 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-01-23 14:23:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-01-23 14:23:31,589 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:31,589 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:31,589 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:23:31,589 INFO L82 PathProgramCache]: Analyzing trace with hash -809322687, now seen corresponding path program 1 times [2018-01-23 14:23:31,589 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:31,589 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:31,590 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:31,590 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:31,590 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:31,614 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:23:31,684 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:23:31,685 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-23 14:23:31,686 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-23 14:23:31,687 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-23 14:23:31,687 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:23:31,687 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 5 states. [2018-01-23 14:23:31,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:31,763 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2018-01-23 14:23:31,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:23:31,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2018-01-23 14:23:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:31,766 INFO L225 Difference]: With dead ends: 69 [2018-01-23 14:23:31,766 INFO L226 Difference]: Without dead ends: 64 [2018-01-23 14:23:31,767 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-23 14:23:31,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-01-23 14:23:31,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2018-01-23 14:23:31,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-01-23 14:23:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2018-01-23 14:23:31,777 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 43 [2018-01-23 14:23:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:31,778 INFO L432 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2018-01-23 14:23:31,778 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-23 14:23:31,778 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2018-01-23 14:23:31,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-23 14:23:31,780 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:31,780 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:31,780 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:23:31,780 INFO L82 PathProgramCache]: Analyzing trace with hash 2078335056, now seen corresponding path program 1 times [2018-01-23 14:23:31,781 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:31,781 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:31,782 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:31,782 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:31,782 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:31,800 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:23:31,874 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:23:31,875 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-23 14:23:31,875 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-23 14:23:31,875 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-23 14:23:31,875 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-23 14:23:31,876 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 4 states. [2018-01-23 14:23:32,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:32,016 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2018-01-23 14:23:32,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-23 14:23:32,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2018-01-23 14:23:32,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:32,017 INFO L225 Difference]: With dead ends: 62 [2018-01-23 14:23:32,017 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:23:32,018 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-23 14:23:32,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:23:32,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:23:32,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:23:32,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:23:32,019 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2018-01-23 14:23:32,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:32,019 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:23:32,019 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-23 14:23:32,019 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:23:32,019 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:23:32,021 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:23:32,022 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:23:32,022 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:23:32,022 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:23:32,022 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:23:32,022 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:23:32,022 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:23:32,022 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == SumErr0EnsuresViolation======== [2018-01-23 14:23:32,022 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:23:32,024 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2018-01-23 14:23:32,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-23 14:23:32,025 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:32,025 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:32,025 INFO L371 AbstractCegarLoop]: === Iteration 1 === [SumErr0EnsuresViolation]=== [2018-01-23 14:23:32,025 INFO L82 PathProgramCache]: Analyzing trace with hash 112235281, now seen corresponding path program 1 times [2018-01-23 14:23:32,025 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:32,026 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:32,026 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:32,027 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:32,027 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:32,037 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:23:32,050 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:23:32,050 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:23:32,051 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:23:32,051 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:23:32,051 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:23:32,051 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 2 states. [2018-01-23 14:23:32,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:32,057 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2018-01-23 14:23:32,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:23:32,057 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2018-01-23 14:23:32,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:32,058 INFO L225 Difference]: With dead ends: 88 [2018-01-23 14:23:32,058 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:23:32,058 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:23:32,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:23:32,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:23:32,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:23:32,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:23:32,059 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2018-01-23 14:23:32,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:32,060 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:23:32,060 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:23:32,060 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:23:32,060 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:23:32,062 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:23:32,062 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:23:32,062 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:23:32,062 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:23:32,062 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:23:32,063 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:23:32,063 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:23:32,063 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-23 14:23:32,063 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:23:32,064 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2018-01-23 14:23:32,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-23 14:23:32,066 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:32,066 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:32,066 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:32,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2005137936, now seen corresponding path program 1 times [2018-01-23 14:23:32,066 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:32,066 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:32,067 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:32,068 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:32,068 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:32,078 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:23:32,091 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:23:32,091 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:23:32,091 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:23:32,092 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:23:32,092 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:23:32,092 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 2 states. [2018-01-23 14:23:32,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:32,097 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2018-01-23 14:23:32,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:23:32,097 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2018-01-23 14:23:32,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:32,098 INFO L225 Difference]: With dead ends: 88 [2018-01-23 14:23:32,099 INFO L226 Difference]: Without dead ends: 52 [2018-01-23 14:23:32,099 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:23:32,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-01-23 14:23:32,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-01-23 14:23:32,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-23 14:23:32,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2018-01-23 14:23:32,106 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 37 [2018-01-23 14:23:32,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:32,106 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2018-01-23 14:23:32,106 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:23:32,106 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2018-01-23 14:23:32,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-23 14:23:32,107 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:32,108 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:32,108 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:32,108 INFO L82 PathProgramCache]: Analyzing trace with hash -336037328, now seen corresponding path program 1 times [2018-01-23 14:23:32,108 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:32,108 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:32,109 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:32,109 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:32,109 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:32,122 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:23:32,199 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:23:32,199 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-23 14:23:32,199 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-23 14:23:32,199 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-23 14:23:32,200 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:23:32,200 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 5 states. [2018-01-23 14:23:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:32,224 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2018-01-23 14:23:32,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:23:32,224 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2018-01-23 14:23:32,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:32,226 INFO L225 Difference]: With dead ends: 65 [2018-01-23 14:23:32,226 INFO L226 Difference]: Without dead ends: 62 [2018-01-23 14:23:32,226 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-23 14:23:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-01-23 14:23:32,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2018-01-23 14:23:32,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-23 14:23:32,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2018-01-23 14:23:32,231 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 41 [2018-01-23 14:23:32,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:32,232 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2018-01-23 14:23:32,232 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-23 14:23:32,232 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2018-01-23 14:23:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-23 14:23:32,233 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:32,233 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:32,233 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:32,233 INFO L82 PathProgramCache]: Analyzing trace with hash 609983231, now seen corresponding path program 1 times [2018-01-23 14:23:32,233 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:32,233 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:32,234 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:32,234 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:32,234 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:32,251 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:23:32,317 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:23:32,317 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-23 14:23:32,318 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-23 14:23:32,318 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-23 14:23:32,318 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:23:32,318 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 5 states. [2018-01-23 14:23:32,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:32,349 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2018-01-23 14:23:32,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:23:32,350 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2018-01-23 14:23:32,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:32,351 INFO L225 Difference]: With dead ends: 96 [2018-01-23 14:23:32,352 INFO L226 Difference]: Without dead ends: 69 [2018-01-23 14:23:32,352 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-23 14:23:32,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-23 14:23:32,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2018-01-23 14:23:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-01-23 14:23:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2018-01-23 14:23:32,359 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 44 [2018-01-23 14:23:32,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:32,360 INFO L432 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2018-01-23 14:23:32,360 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-23 14:23:32,360 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2018-01-23 14:23:32,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-01-23 14:23:32,362 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:32,362 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:32,362 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:32,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1680046266, now seen corresponding path program 1 times [2018-01-23 14:23:32,362 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:32,362 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:32,363 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:32,363 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:32,364 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:32,383 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-23 14:23:32,722 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:23:32,722 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-23 14:23:32,722 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-23 14:23:32,722 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-23 14:23:32,723 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-23 14:23:32,723 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 6 states. [2018-01-23 14:23:32,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:32,849 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2018-01-23 14:23:32,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-23 14:23:32,849 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2018-01-23 14:23:32,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:32,850 INFO L225 Difference]: With dead ends: 76 [2018-01-23 14:23:32,850 INFO L226 Difference]: Without dead ends: 65 [2018-01-23 14:23:32,851 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-23 14:23:32,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-01-23 14:23:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2018-01-23 14:23:32,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-01-23 14:23:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2018-01-23 14:23:32,855 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 47 [2018-01-23 14:23:32,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:32,857 INFO L432 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2018-01-23 14:23:32,857 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-23 14:23:32,857 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2018-01-23 14:23:32,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-01-23 14:23:32,858 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:32,858 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:32,858 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:32,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1025820889, now seen corresponding path program 1 times [2018-01-23 14:23:32,859 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:32,859 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:32,859 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:32,859 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:32,860 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:32,875 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-23 14:23:33,119 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:33,119 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:33,125 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:33,168 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-23 14:23:33,251 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-23 14:23:33,251 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2018-01-23 14:23:33,252 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:23:33,252 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:23:33,252 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:23:33,252 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 10 states. [2018-01-23 14:23:33,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:33,771 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2018-01-23 14:23:33,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-23 14:23:33,772 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2018-01-23 14:23:33,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:33,773 INFO L225 Difference]: With dead ends: 117 [2018-01-23 14:23:33,773 INFO L226 Difference]: Without dead ends: 62 [2018-01-23 14:23:33,774 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-01-23 14:23:33,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-01-23 14:23:33,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2018-01-23 14:23:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-01-23 14:23:33,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2018-01-23 14:23:33,780 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 50 [2018-01-23 14:23:33,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:33,780 INFO L432 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2018-01-23 14:23:33,781 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:23:33,781 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2018-01-23 14:23:33,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-01-23 14:23:33,782 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:33,782 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:33,782 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:33,782 INFO L82 PathProgramCache]: Analyzing trace with hash -943664249, now seen corresponding path program 1 times [2018-01-23 14:23:33,782 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:33,782 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:33,783 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:33,784 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:33,784 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:33,801 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-23 14:23:34,056 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:34,056 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:34,062 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:34,097 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-01-23 14:23:34,155 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:23:34,155 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2018-01-23 14:23:34,156 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-23 14:23:34,156 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-23 14:23:34,156 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-01-23 14:23:34,156 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 12 states. [2018-01-23 14:23:34,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:34,343 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2018-01-23 14:23:34,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-23 14:23:34,344 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2018-01-23 14:23:34,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:34,344 INFO L225 Difference]: With dead ends: 120 [2018-01-23 14:23:34,344 INFO L226 Difference]: Without dead ends: 69 [2018-01-23 14:23:34,345 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-01-23 14:23:34,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-23 14:23:34,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2018-01-23 14:23:34,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-23 14:23:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2018-01-23 14:23:34,352 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 54 [2018-01-23 14:23:34,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:34,352 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2018-01-23 14:23:34,352 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-23 14:23:34,352 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2018-01-23 14:23:34,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-01-23 14:23:34,353 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:34,353 INFO L322 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:34,353 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:34,353 INFO L82 PathProgramCache]: Analyzing trace with hash 551937012, now seen corresponding path program 2 times [2018-01-23 14:23:34,354 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:34,354 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:34,354 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:34,354 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:34,354 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:34,370 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-01-23 14:23:34,464 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:34,464 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:34,473 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:23:34,491 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:34,502 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:34,503 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:23:34,507 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-01-23 14:23:34,594 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:23:34,595 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-01-23 14:23:34,595 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:23:34,595 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:23:34,596 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:23:34,596 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 10 states. [2018-01-23 14:23:34,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:34,621 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2018-01-23 14:23:34,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-23 14:23:34,622 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2018-01-23 14:23:34,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:34,623 INFO L225 Difference]: With dead ends: 121 [2018-01-23 14:23:34,623 INFO L226 Difference]: Without dead ends: 67 [2018-01-23 14:23:34,624 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-01-23 14:23:34,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-01-23 14:23:34,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-01-23 14:23:34,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-01-23 14:23:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2018-01-23 14:23:34,631 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 61 [2018-01-23 14:23:34,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:34,632 INFO L432 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2018-01-23 14:23:34,632 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:23:34,632 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2018-01-23 14:23:34,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-01-23 14:23:34,633 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:34,633 INFO L322 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:34,633 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:34,634 INFO L82 PathProgramCache]: Analyzing trace with hash -2066944597, now seen corresponding path program 3 times [2018-01-23 14:23:34,634 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:34,634 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:34,635 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:34,635 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:23:34,635 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:34,656 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-01-23 14:23:34,783 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:34,783 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:34,789 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:23:34,807 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:23:34,818 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:23:34,821 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:23:34,826 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:34,880 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-01-23 14:23:34,883 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-01-23 14:23:34,883 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:34,885 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:34,888 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:34,888 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2018-01-23 14:23:34,901 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2018-01-23 14:23:34,904 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:34,905 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:34,907 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 31 [2018-01-23 14:23:34,908 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:34,914 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:34,918 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:34,919 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2018-01-23 14:23:34,934 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2018-01-23 14:23:34,939 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:34,940 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:34,941 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:34,942 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:34,942 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:34,943 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:34,944 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 78 [2018-01-23 14:23:34,944 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:34,959 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:34,965 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:34,965 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2018-01-23 14:23:34,980 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2018-01-23 14:23:34,983 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:34,984 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:34,984 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:34,985 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:34,986 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:34,987 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:34,987 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:34,988 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:34,989 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:34,989 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:34,990 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:34,999 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,000 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 149 [2018-01-23 14:23:35,001 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:35,017 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:35,023 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:35,023 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2018-01-23 14:23:35,044 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 37 [2018-01-23 14:23:35,048 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,049 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,050 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,051 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,051 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,052 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,053 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,053 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,054 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,054 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,055 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,056 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,056 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,057 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,058 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,058 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,060 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 16 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 206 [2018-01-23 14:23:35,061 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:35,086 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:35,092 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:35,093 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:47 [2018-01-23 14:23:35,115 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 44 [2018-01-23 14:23:35,119 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,119 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,120 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,121 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,122 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,122 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,123 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,123 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,124 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,124 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,125 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,126 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,126 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,127 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,127 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,128 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,129 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,129 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,130 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,130 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,131 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,132 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 253 [2018-01-23 14:23:35,134 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:35,182 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:35,190 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:35,191 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:60, output treesize:56 [2018-01-23 14:23:35,220 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 51 [2018-01-23 14:23:35,224 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,230 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,231 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,232 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,232 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,233 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,233 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,234 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,234 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,235 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,235 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,236 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,236 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,237 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,237 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,238 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,239 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,239 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,240 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,240 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,241 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,242 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,242 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,243 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,244 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,245 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,245 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:35,246 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 27 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 308 [2018-01-23 14:23:35,248 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:35,302 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:35,312 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:35,312 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:69, output treesize:65 [2018-01-23 14:23:35,552 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-01-23 14:23:35,552 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:35,553 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:35,553 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:121, output treesize:1 [2018-01-23 14:23:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-01-23 14:23:35,596 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:23:35,596 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 16] total 21 [2018-01-23 14:23:35,596 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-23 14:23:35,596 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-23 14:23:35,596 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2018-01-23 14:23:35,597 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 21 states. [2018-01-23 14:23:36,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:36,044 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2018-01-23 14:23:36,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-23 14:23:36,044 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 62 [2018-01-23 14:23:36,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:36,045 INFO L225 Difference]: With dead ends: 134 [2018-01-23 14:23:36,045 INFO L226 Difference]: Without dead ends: 77 [2018-01-23 14:23:36,046 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2018-01-23 14:23:36,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-01-23 14:23:36,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2018-01-23 14:23:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-01-23 14:23:36,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2018-01-23 14:23:36,055 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 62 [2018-01-23 14:23:36,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:36,055 INFO L432 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2018-01-23 14:23:36,055 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-23 14:23:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2018-01-23 14:23:36,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-01-23 14:23:36,056 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:36,056 INFO L322 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:36,056 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:36,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2093908176, now seen corresponding path program 4 times [2018-01-23 14:23:36,057 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:36,057 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:36,058 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:36,058 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:23:36,058 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:36,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:36,076 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-23 14:23:36,218 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:36,218 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:36,226 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:23:36,251 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:23:36,254 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-23 14:23:36,313 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:23:36,313 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-01-23 14:23:36,313 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-23 14:23:36,314 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-23 14:23:36,314 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:23:36,314 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand 14 states. [2018-01-23 14:23:36,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:36,337 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2018-01-23 14:23:36,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-23 14:23:36,338 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2018-01-23 14:23:36,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:36,339 INFO L225 Difference]: With dead ends: 135 [2018-01-23 14:23:36,339 INFO L226 Difference]: Without dead ends: 75 [2018-01-23 14:23:36,339 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-01-23 14:23:36,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-01-23 14:23:36,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-01-23 14:23:36,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-01-23 14:23:36,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2018-01-23 14:23:36,349 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 69 [2018-01-23 14:23:36,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:36,349 INFO L432 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2018-01-23 14:23:36,349 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-23 14:23:36,349 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2018-01-23 14:23:36,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-01-23 14:23:36,350 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:36,350 INFO L322 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:36,350 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:36,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1961550311, now seen corresponding path program 5 times [2018-01-23 14:23:36,350 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:36,350 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:36,351 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:36,351 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:23:36,351 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:36,365 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-23 14:23:36,555 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:36,555 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:36,563 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:23:36,572 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:36,575 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:36,578 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:36,589 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:36,593 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:23:36,597 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-23 14:23:36,679 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:23:36,679 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-01-23 14:23:36,680 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-23 14:23:36,680 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-23 14:23:36,680 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-01-23 14:23:36,680 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 16 states. [2018-01-23 14:23:36,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:36,719 INFO L93 Difference]: Finished difference Result 136 states and 146 transitions. [2018-01-23 14:23:36,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-23 14:23:36,719 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2018-01-23 14:23:36,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:36,720 INFO L225 Difference]: With dead ends: 136 [2018-01-23 14:23:36,720 INFO L226 Difference]: Without dead ends: 76 [2018-01-23 14:23:36,721 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2018-01-23 14:23:36,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-01-23 14:23:36,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-01-23 14:23:36,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-23 14:23:36,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2018-01-23 14:23:36,729 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 70 [2018-01-23 14:23:36,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:36,729 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2018-01-23 14:23:36,729 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-23 14:23:36,730 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2018-01-23 14:23:36,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-01-23 14:23:36,730 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:36,731 INFO L322 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:36,731 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:36,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1168255472, now seen corresponding path program 6 times [2018-01-23 14:23:36,731 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:36,731 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:36,732 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:36,732 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:23:36,732 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:36,748 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-23 14:23:36,870 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:36,870 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:36,874 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:23:36,887 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:23:36,895 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:23:36,902 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:23:36,941 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:23:36,942 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:23:36,945 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-23 14:23:37,022 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:23:37,022 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-01-23 14:23:37,023 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-23 14:23:37,023 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-23 14:23:37,023 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2018-01-23 14:23:37,023 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 18 states. [2018-01-23 14:23:37,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:37,077 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2018-01-23 14:23:37,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-23 14:23:37,078 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 71 [2018-01-23 14:23:37,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:37,079 INFO L225 Difference]: With dead ends: 137 [2018-01-23 14:23:37,079 INFO L226 Difference]: Without dead ends: 77 [2018-01-23 14:23:37,079 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2018-01-23 14:23:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-01-23 14:23:37,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-01-23 14:23:37,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-23 14:23:37,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2018-01-23 14:23:37,084 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 71 [2018-01-23 14:23:37,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:37,085 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2018-01-23 14:23:37,085 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-23 14:23:37,085 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2018-01-23 14:23:37,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-01-23 14:23:37,086 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:37,086 INFO L322 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:37,086 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:37,086 INFO L82 PathProgramCache]: Analyzing trace with hash 592013063, now seen corresponding path program 7 times [2018-01-23 14:23:37,086 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:37,086 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:37,087 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:37,087 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:23:37,087 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:37,104 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-23 14:23:37,221 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:37,221 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:37,226 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:37,248 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-23 14:23:37,326 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:23:37,326 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-01-23 14:23:37,326 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-23 14:23:37,327 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-23 14:23:37,327 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=229, Unknown=0, NotChecked=0, Total=380 [2018-01-23 14:23:37,328 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 20 states. [2018-01-23 14:23:37,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:37,356 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2018-01-23 14:23:37,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-23 14:23:37,359 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2018-01-23 14:23:37,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:37,360 INFO L225 Difference]: With dead ends: 138 [2018-01-23 14:23:37,360 INFO L226 Difference]: Without dead ends: 78 [2018-01-23 14:23:37,361 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2018-01-23 14:23:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-01-23 14:23:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-01-23 14:23:37,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-01-23 14:23:37,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2018-01-23 14:23:37,365 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 72 [2018-01-23 14:23:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:37,366 INFO L432 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2018-01-23 14:23:37,366 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-23 14:23:37,366 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2018-01-23 14:23:37,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-01-23 14:23:37,366 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:37,366 INFO L322 BasicCegarLoop]: trace histogram [8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:37,366 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:37,366 INFO L82 PathProgramCache]: Analyzing trace with hash -674237200, now seen corresponding path program 8 times [2018-01-23 14:23:37,367 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:37,367 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:37,367 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:37,367 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:37,367 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:37,379 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-23 14:23:37,540 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:37,540 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:37,548 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:23:37,574 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:37,594 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:37,597 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:23:37,600 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-23 14:23:37,686 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:23:37,687 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-01-23 14:23:37,687 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-23 14:23:37,687 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-23 14:23:37,687 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-01-23 14:23:37,687 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 22 states. [2018-01-23 14:23:37,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:37,728 INFO L93 Difference]: Finished difference Result 139 states and 149 transitions. [2018-01-23 14:23:37,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-23 14:23:37,729 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 73 [2018-01-23 14:23:37,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:37,730 INFO L225 Difference]: With dead ends: 139 [2018-01-23 14:23:37,730 INFO L226 Difference]: Without dead ends: 79 [2018-01-23 14:23:37,730 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2018-01-23 14:23:37,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-01-23 14:23:37,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-01-23 14:23:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-01-23 14:23:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2018-01-23 14:23:37,735 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 73 [2018-01-23 14:23:37,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:37,735 INFO L432 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2018-01-23 14:23:37,735 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-23 14:23:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2018-01-23 14:23:37,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-01-23 14:23:37,736 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:37,736 INFO L322 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:37,736 INFO L371 AbstractCegarLoop]: === Iteration 14 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:37,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1273289689, now seen corresponding path program 9 times [2018-01-23 14:23:37,736 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:37,737 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:37,737 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:37,737 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:23:37,737 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:37,750 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-23 14:23:37,864 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:37,864 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:37,869 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:23:37,882 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:23:37,892 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:23:37,905 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:23:37,907 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:23:37,910 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:37,927 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-01-23 14:23:37,929 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-01-23 14:23:37,929 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:37,930 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:37,933 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:37,933 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2018-01-23 14:23:37,945 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2018-01-23 14:23:37,947 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:37,948 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:37,948 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 37 [2018-01-23 14:23:37,948 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:37,952 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:37,956 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:37,956 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2018-01-23 14:23:37,970 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2018-01-23 14:23:37,972 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:37,973 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:37,973 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:37,974 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:37,974 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:37,975 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:37,975 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 88 [2018-01-23 14:23:37,976 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:37,985 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:37,994 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:37,994 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2018-01-23 14:23:38,340 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 48 [2018-01-23 14:23:38,344 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:38,345 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:38,345 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:38,346 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 8 [2018-01-23 14:23:38,346 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:38,357 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:38,358 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:38,359 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:38,359 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2018-01-23 14:23:38,360 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:38,363 INFO L267 ElimStorePlain]: Start of recursive call 2: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:38,373 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:38,373 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:56, output treesize:3 [2018-01-23 14:23:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-01-23 14:23:38,422 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:23:38,422 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2018-01-23 14:23:38,423 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-01-23 14:23:38,423 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-01-23 14:23:38,423 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2018-01-23 14:23:38,424 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 27 states. [2018-01-23 14:23:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:39,083 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2018-01-23 14:23:39,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-23 14:23:39,084 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 74 [2018-01-23 14:23:39,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:39,084 INFO L225 Difference]: With dead ends: 153 [2018-01-23 14:23:39,084 INFO L226 Difference]: Without dead ends: 93 [2018-01-23 14:23:39,085 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2018-01-23 14:23:39,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-01-23 14:23:39,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2018-01-23 14:23:39,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-01-23 14:23:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2018-01-23 14:23:39,091 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 74 [2018-01-23 14:23:39,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:39,092 INFO L432 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2018-01-23 14:23:39,092 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-01-23 14:23:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2018-01-23 14:23:39,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-01-23 14:23:39,092 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:39,092 INFO L322 BasicCegarLoop]: trace histogram [10, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:39,092 INFO L371 AbstractCegarLoop]: === Iteration 15 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:39,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1985959263, now seen corresponding path program 1 times [2018-01-23 14:23:39,093 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:39,093 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:39,093 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:39,093 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:23:39,093 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:39,106 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-23 14:23:39,270 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:39,270 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:39,275 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:39,304 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-23 14:23:39,456 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:23:39,456 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2018-01-23 14:23:39,456 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-23 14:23:39,456 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-23 14:23:39,457 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=394, Unknown=0, NotChecked=0, Total=650 [2018-01-23 14:23:39,457 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand 26 states. [2018-01-23 14:23:39,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:39,499 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2018-01-23 14:23:39,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-23 14:23:39,500 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 78 [2018-01-23 14:23:39,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:39,500 INFO L225 Difference]: With dead ends: 163 [2018-01-23 14:23:39,500 INFO L226 Difference]: Without dead ends: 92 [2018-01-23 14:23:39,501 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=271, Invalid=431, Unknown=0, NotChecked=0, Total=702 [2018-01-23 14:23:39,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-01-23 14:23:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-01-23 14:23:39,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-01-23 14:23:39,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2018-01-23 14:23:39,510 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 78 [2018-01-23 14:23:39,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:39,510 INFO L432 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2018-01-23 14:23:39,510 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-23 14:23:39,510 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2018-01-23 14:23:39,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-01-23 14:23:39,511 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:39,511 INFO L322 BasicCegarLoop]: trace histogram [11, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:39,511 INFO L371 AbstractCegarLoop]: === Iteration 16 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:39,512 INFO L82 PathProgramCache]: Analyzing trace with hash 580128904, now seen corresponding path program 2 times [2018-01-23 14:23:39,512 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:39,512 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:39,513 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:39,513 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:39,513 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:39,529 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-23 14:23:39,730 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:39,730 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:39,737 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:23:39,752 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:39,769 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:39,772 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:23:39,774 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-23 14:23:39,876 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:23:39,876 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2018-01-23 14:23:39,877 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-23 14:23:39,877 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-23 14:23:39,877 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=459, Unknown=0, NotChecked=0, Total=756 [2018-01-23 14:23:39,877 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand 28 states. [2018-01-23 14:23:39,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:39,913 INFO L93 Difference]: Finished difference Result 164 states and 176 transitions. [2018-01-23 14:23:39,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-23 14:23:39,914 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2018-01-23 14:23:39,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:39,915 INFO L225 Difference]: With dead ends: 164 [2018-01-23 14:23:39,915 INFO L226 Difference]: Without dead ends: 93 [2018-01-23 14:23:39,915 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2018-01-23 14:23:39,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-01-23 14:23:39,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-01-23 14:23:39,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-01-23 14:23:39,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2018-01-23 14:23:39,922 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 79 [2018-01-23 14:23:39,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:39,922 INFO L432 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2018-01-23 14:23:39,922 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-23 14:23:39,922 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2018-01-23 14:23:39,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-01-23 14:23:39,923 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:39,923 INFO L322 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:39,923 INFO L371 AbstractCegarLoop]: === Iteration 17 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:39,923 INFO L82 PathProgramCache]: Analyzing trace with hash -50939265, now seen corresponding path program 3 times [2018-01-23 14:23:39,924 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:39,924 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:39,924 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:39,925 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:23:39,925 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:39,941 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-23 14:23:40,190 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:40,191 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:40,198 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:23:40,218 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:23:40,233 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:23:40,251 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:23:40,254 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:23:40,258 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:40,285 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-01-23 14:23:40,287 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-01-23 14:23:40,287 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,289 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,291 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,292 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2018-01-23 14:23:40,306 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2018-01-23 14:23:40,309 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,310 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,311 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 31 [2018-01-23 14:23:40,311 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,316 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,320 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,320 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2018-01-23 14:23:40,338 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2018-01-23 14:23:40,344 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,345 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,345 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,346 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,347 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,347 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,348 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 78 [2018-01-23 14:23:40,348 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,359 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,364 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,364 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2018-01-23 14:23:40,390 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2018-01-23 14:23:40,396 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,397 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,398 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,398 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,399 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,400 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,400 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,401 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,402 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,402 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,403 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,404 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,404 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 149 [2018-01-23 14:23:40,405 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,421 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,427 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,427 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2018-01-23 14:23:40,448 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 37 [2018-01-23 14:23:40,450 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,451 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,451 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,452 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,453 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,453 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,454 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,454 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,455 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,456 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,456 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,457 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,458 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,458 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,459 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,460 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,460 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 16 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 206 [2018-01-23 14:23:40,461 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,483 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,490 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,490 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:47 [2018-01-23 14:23:40,516 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 44 [2018-01-23 14:23:40,518 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,519 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,520 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,520 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,521 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,522 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,523 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,523 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,524 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,525 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,525 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,526 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,527 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,527 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,528 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,529 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,529 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,530 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,531 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,532 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,532 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,534 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 253 [2018-01-23 14:23:40,534 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,572 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,582 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,582 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:60, output treesize:56 [2018-01-23 14:23:40,611 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 51 [2018-01-23 14:23:40,614 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,614 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,615 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,616 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,616 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,617 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,617 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,618 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,619 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,619 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,620 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,620 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,621 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,622 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,622 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,623 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,623 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,624 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,624 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,625 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,626 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,626 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,627 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,627 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,628 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,629 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,629 INFO L700 Elim1Store]: detected not equals via solver [2018-01-23 14:23:40,630 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 27 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 308 [2018-01-23 14:23:40,631 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,682 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,691 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,691 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:69, output treesize:65 [2018-01-23 14:23:40,923 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-01-23 14:23:40,923 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,924 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:23:40,924 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:121, output treesize:1 [2018-01-23 14:23:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-01-23 14:23:40,973 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:23:40,973 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2018-01-23 14:23:40,973 INFO L409 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-01-23 14:23:40,974 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-01-23 14:23:40,974 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2018-01-23 14:23:40,974 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand 31 states. [2018-01-23 14:23:41,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:41,525 INFO L93 Difference]: Finished difference Result 177 states and 190 transitions. [2018-01-23 14:23:41,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-01-23 14:23:41,525 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 80 [2018-01-23 14:23:41,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:41,526 INFO L225 Difference]: With dead ends: 177 [2018-01-23 14:23:41,526 INFO L226 Difference]: Without dead ends: 103 [2018-01-23 14:23:41,527 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2018-01-23 14:23:41,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-01-23 14:23:41,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2018-01-23 14:23:41,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-01-23 14:23:41,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2018-01-23 14:23:41,535 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 80 [2018-01-23 14:23:41,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:41,535 INFO L432 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2018-01-23 14:23:41,535 INFO L433 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-01-23 14:23:41,535 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2018-01-23 14:23:41,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-01-23 14:23:41,536 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:41,536 INFO L322 BasicCegarLoop]: trace histogram [13, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:41,536 INFO L371 AbstractCegarLoop]: === Iteration 18 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:41,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1039900620, now seen corresponding path program 4 times [2018-01-23 14:23:41,536 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:41,536 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:41,537 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:41,537 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:23:41,537 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:41,551 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-01-23 14:23:41,754 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:41,754 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:41,762 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:23:41,785 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:23:41,788 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-01-23 14:23:41,998 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:23:41,999 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2018-01-23 14:23:41,999 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-01-23 14:23:41,999 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-01-23 14:23:41,999 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2018-01-23 14:23:41,999 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 29 states. [2018-01-23 14:23:54,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:54,539 INFO L93 Difference]: Finished difference Result 179 states and 191 transitions. [2018-01-23 14:23:54,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-23 14:23:54,539 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 87 [2018-01-23 14:23:54,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:54,540 INFO L225 Difference]: With dead ends: 179 [2018-01-23 14:23:54,540 INFO L226 Difference]: Without dead ends: 99 [2018-01-23 14:23:54,540 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2018-01-23 14:23:54,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-01-23 14:23:54,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2018-01-23 14:23:54,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-01-23 14:23:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2018-01-23 14:23:54,546 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 87 [2018-01-23 14:23:54,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:54,547 INFO L432 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2018-01-23 14:23:54,547 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-01-23 14:23:54,547 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2018-01-23 14:23:54,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-01-23 14:23:54,547 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:54,547 INFO L322 BasicCegarLoop]: trace histogram [14, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:54,547 INFO L371 AbstractCegarLoop]: === Iteration 19 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:54,547 INFO L82 PathProgramCache]: Analyzing trace with hash -318786000, now seen corresponding path program 10 times [2018-01-23 14:23:54,548 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:54,548 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:54,548 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:54,548 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:23:54,548 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:54,559 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:23:54,742 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:54,742 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:54,747 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:23:54,833 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:23:54,836 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:23:54,955 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:23:54,955 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2018-01-23 14:23:54,955 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-23 14:23:54,955 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-23 14:23:54,956 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=684, Unknown=0, NotChecked=0, Total=1122 [2018-01-23 14:23:54,956 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 34 states. [2018-01-23 14:23:54,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:54,996 INFO L93 Difference]: Finished difference Result 169 states and 179 transitions. [2018-01-23 14:23:54,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-23 14:23:54,997 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 91 [2018-01-23 14:23:54,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:54,997 INFO L225 Difference]: With dead ends: 169 [2018-01-23 14:23:54,997 INFO L226 Difference]: Without dead ends: 97 [2018-01-23 14:23:54,998 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=457, Invalid=733, Unknown=0, NotChecked=0, Total=1190 [2018-01-23 14:23:54,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-01-23 14:23:55,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-01-23 14:23:55,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-01-23 14:23:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2018-01-23 14:23:55,006 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 91 [2018-01-23 14:23:55,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:55,006 INFO L432 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2018-01-23 14:23:55,006 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-23 14:23:55,006 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2018-01-23 14:23:55,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-01-23 14:23:55,007 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:55,007 INFO L322 BasicCegarLoop]: trace histogram [15, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:55,007 INFO L371 AbstractCegarLoop]: === Iteration 20 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:55,007 INFO L82 PathProgramCache]: Analyzing trace with hash -468179545, now seen corresponding path program 11 times [2018-01-23 14:23:55,007 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:55,007 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:55,008 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:55,008 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:23:55,008 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:55,025 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:23:55,224 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:55,225 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:55,229 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:23:55,237 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:55,238 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:55,240 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:55,243 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:55,247 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:55,252 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:55,266 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:55,277 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:55,297 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:55,300 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:23:55,303 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:23:55,451 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:23:55,452 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2018-01-23 14:23:55,452 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-23 14:23:55,452 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-23 14:23:55,452 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=769, Unknown=0, NotChecked=0, Total=1260 [2018-01-23 14:23:55,453 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand 36 states. [2018-01-23 14:23:55,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:55,513 INFO L93 Difference]: Finished difference Result 170 states and 180 transitions. [2018-01-23 14:23:55,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-23 14:23:55,513 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 92 [2018-01-23 14:23:55,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:55,514 INFO L225 Difference]: With dead ends: 170 [2018-01-23 14:23:55,514 INFO L226 Difference]: Without dead ends: 98 [2018-01-23 14:23:55,515 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=511, Invalid=821, Unknown=0, NotChecked=0, Total=1332 [2018-01-23 14:23:55,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-01-23 14:23:55,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-01-23 14:23:55,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-01-23 14:23:55,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2018-01-23 14:23:55,525 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 92 [2018-01-23 14:23:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:55,525 INFO L432 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2018-01-23 14:23:55,526 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-23 14:23:55,526 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2018-01-23 14:23:55,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-01-23 14:23:55,526 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:55,527 INFO L322 BasicCegarLoop]: trace histogram [16, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:55,527 INFO L371 AbstractCegarLoop]: === Iteration 21 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:55,527 INFO L82 PathProgramCache]: Analyzing trace with hash -804412144, now seen corresponding path program 12 times [2018-01-23 14:23:55,527 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:55,527 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:55,528 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:55,528 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:23:55,528 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:55,545 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:23:55,921 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:55,921 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:55,928 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:23:55,944 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:23:55,957 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:23:55,973 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:23:56,010 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:23:56,103 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:23:56,182 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:23:56,334 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:23:56,539 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:23:57,016 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:23:57,018 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:23:57,023 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:23:57,192 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:23:57,193 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2018-01-23 14:23:57,193 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-01-23 14:23:57,193 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-01-23 14:23:57,194 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=859, Unknown=0, NotChecked=0, Total=1406 [2018-01-23 14:23:57,194 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand 38 states. [2018-01-23 14:23:57,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:57,254 INFO L93 Difference]: Finished difference Result 171 states and 181 transitions. [2018-01-23 14:23:57,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-23 14:23:57,254 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 93 [2018-01-23 14:23:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:57,255 INFO L225 Difference]: With dead ends: 171 [2018-01-23 14:23:57,255 INFO L226 Difference]: Without dead ends: 99 [2018-01-23 14:23:57,255 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=568, Invalid=914, Unknown=0, NotChecked=0, Total=1482 [2018-01-23 14:23:57,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-01-23 14:23:57,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-01-23 14:23:57,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-01-23 14:23:57,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2018-01-23 14:23:57,262 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 93 [2018-01-23 14:23:57,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:57,263 INFO L432 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2018-01-23 14:23:57,263 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-01-23 14:23:57,263 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2018-01-23 14:23:57,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-01-23 14:23:57,263 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:57,263 INFO L322 BasicCegarLoop]: trace histogram [17, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:57,263 INFO L371 AbstractCegarLoop]: === Iteration 22 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:57,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1657279175, now seen corresponding path program 13 times [2018-01-23 14:23:57,264 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:57,264 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:57,264 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:57,264 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:23:57,264 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:57,277 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:23:57,555 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:57,555 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:57,564 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:57,597 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:23:57,837 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:23:57,837 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2018-01-23 14:23:57,837 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-23 14:23:57,838 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-23 14:23:57,838 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=954, Unknown=0, NotChecked=0, Total=1560 [2018-01-23 14:23:57,838 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand 40 states. [2018-01-23 14:23:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:57,896 INFO L93 Difference]: Finished difference Result 172 states and 182 transitions. [2018-01-23 14:23:57,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-23 14:23:57,897 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 94 [2018-01-23 14:23:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:57,898 INFO L225 Difference]: With dead ends: 172 [2018-01-23 14:23:57,898 INFO L226 Difference]: Without dead ends: 100 [2018-01-23 14:23:57,899 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=628, Invalid=1012, Unknown=0, NotChecked=0, Total=1640 [2018-01-23 14:23:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-01-23 14:23:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-01-23 14:23:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-01-23 14:23:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2018-01-23 14:23:57,908 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 94 [2018-01-23 14:23:57,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:57,908 INFO L432 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2018-01-23 14:23:57,908 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-23 14:23:57,908 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2018-01-23 14:23:57,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-01-23 14:23:57,909 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:57,909 INFO L322 BasicCegarLoop]: trace histogram [18, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:57,909 INFO L371 AbstractCegarLoop]: === Iteration 23 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:57,909 INFO L82 PathProgramCache]: Analyzing trace with hash 660298736, now seen corresponding path program 14 times [2018-01-23 14:23:57,909 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:57,909 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:57,910 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:57,910 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:23:57,910 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:57,925 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:23:58,345 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:58,346 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:58,351 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:23:58,370 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:58,395 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:23:58,399 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:23:58,403 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:23:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:23:58,842 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:23:58,842 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2018-01-23 14:23:58,842 INFO L409 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-01-23 14:23:58,842 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-01-23 14:23:58,843 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=1054, Unknown=0, NotChecked=0, Total=1722 [2018-01-23 14:23:58,843 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 42 states. [2018-01-23 14:23:58,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:23:58,892 INFO L93 Difference]: Finished difference Result 173 states and 183 transitions. [2018-01-23 14:23:58,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-23 14:23:58,893 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 95 [2018-01-23 14:23:58,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:23:58,894 INFO L225 Difference]: With dead ends: 173 [2018-01-23 14:23:58,894 INFO L226 Difference]: Without dead ends: 101 [2018-01-23 14:23:58,895 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=691, Invalid=1115, Unknown=0, NotChecked=0, Total=1806 [2018-01-23 14:23:58,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-01-23 14:23:58,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-01-23 14:23:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-01-23 14:23:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2018-01-23 14:23:58,905 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 95 [2018-01-23 14:23:58,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:23:58,906 INFO L432 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2018-01-23 14:23:58,906 INFO L433 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-01-23 14:23:58,906 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2018-01-23 14:23:58,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-01-23 14:23:58,907 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:23:58,907 INFO L322 BasicCegarLoop]: trace histogram [19, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:23:58,907 INFO L371 AbstractCegarLoop]: === Iteration 24 === [mainErr0EnsuresViolation]=== [2018-01-23 14:23:58,907 INFO L82 PathProgramCache]: Analyzing trace with hash -181323801, now seen corresponding path program 15 times [2018-01-23 14:23:58,907 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:23:58,908 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:23:58,908 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:58,909 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:23:58,909 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:23:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:23:58,928 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:23:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:23:59,242 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:23:59,242 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:23:59,250 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:23:59,266 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:23:59,276 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:23:59,291 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:23:59,307 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:23:59,342 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:23:59,381 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:23:59,449 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:23:59,619 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:23:59,715 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:23:59,845 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:24:00,398 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:24:00,400 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:24:00,405 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:24:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:24:00,611 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:24:00,611 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2018-01-23 14:24:00,611 INFO L409 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-01-23 14:24:00,612 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-01-23 14:24:00,612 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=1159, Unknown=0, NotChecked=0, Total=1892 [2018-01-23 14:24:00,612 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand 44 states. [2018-01-23 14:24:00,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:24:00,699 INFO L93 Difference]: Finished difference Result 174 states and 184 transitions. [2018-01-23 14:24:00,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-23 14:24:00,699 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 96 [2018-01-23 14:24:00,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:24:00,700 INFO L225 Difference]: With dead ends: 174 [2018-01-23 14:24:00,700 INFO L226 Difference]: Without dead ends: 102 [2018-01-23 14:24:00,700 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=757, Invalid=1223, Unknown=0, NotChecked=0, Total=1980 [2018-01-23 14:24:00,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-01-23 14:24:00,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-01-23 14:24:00,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-01-23 14:24:00,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2018-01-23 14:24:00,707 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 96 [2018-01-23 14:24:00,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:24:00,707 INFO L432 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2018-01-23 14:24:00,707 INFO L433 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-01-23 14:24:00,707 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2018-01-23 14:24:00,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-01-23 14:24:00,708 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:24:00,708 INFO L322 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:24:00,708 INFO L371 AbstractCegarLoop]: === Iteration 25 === [mainErr0EnsuresViolation]=== [2018-01-23 14:24:00,709 INFO L82 PathProgramCache]: Analyzing trace with hash -501818672, now seen corresponding path program 16 times [2018-01-23 14:24:00,709 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:24:00,709 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:24:00,709 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:24:00,709 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:24:00,709 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:24:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:24:00,721 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:24:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:24:01,358 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:24:01,378 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:24:01,384 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:24:02,584 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:24:02,589 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:24:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:24:02,812 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:24:02,813 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2018-01-23 14:24:02,813 INFO L409 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-01-23 14:24:02,813 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-01-23 14:24:02,814 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=801, Invalid=1269, Unknown=0, NotChecked=0, Total=2070 [2018-01-23 14:24:02,814 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 46 states. [2018-01-23 14:24:02,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:24:02,872 INFO L93 Difference]: Finished difference Result 175 states and 185 transitions. [2018-01-23 14:24:02,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-23 14:24:02,872 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 97 [2018-01-23 14:24:02,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:24:02,873 INFO L225 Difference]: With dead ends: 175 [2018-01-23 14:24:02,873 INFO L226 Difference]: Without dead ends: 103 [2018-01-23 14:24:02,873 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=826, Invalid=1336, Unknown=0, NotChecked=0, Total=2162 [2018-01-23 14:24:02,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-01-23 14:24:02,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-01-23 14:24:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-01-23 14:24:02,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2018-01-23 14:24:02,879 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 97 [2018-01-23 14:24:02,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:24:02,880 INFO L432 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2018-01-23 14:24:02,880 INFO L433 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-01-23 14:24:02,880 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2018-01-23 14:24:02,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-01-23 14:24:02,881 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:24:02,881 INFO L322 BasicCegarLoop]: trace histogram [21, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:24:02,881 INFO L371 AbstractCegarLoop]: === Iteration 26 === [mainErr0EnsuresViolation]=== [2018-01-23 14:24:02,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1847225081, now seen corresponding path program 17 times [2018-01-23 14:24:02,881 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:24:02,881 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:24:02,882 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:24:02,882 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:24:02,882 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:24:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:24:02,898 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:24:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:24:03,357 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:24:03,357 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:24:03,364 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:24:03,375 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:03,381 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:03,395 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:03,404 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:03,418 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:03,432 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:03,446 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:03,461 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:03,482 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:03,503 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:03,523 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:03,575 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:03,578 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:24:03,583 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:24:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:24:03,846 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:24:03,846 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2018-01-23 14:24:03,846 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-01-23 14:24:03,846 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-01-23 14:24:03,847 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=872, Invalid=1384, Unknown=0, NotChecked=0, Total=2256 [2018-01-23 14:24:03,847 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand 48 states. [2018-01-23 14:24:03,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:24:03,899 INFO L93 Difference]: Finished difference Result 176 states and 186 transitions. [2018-01-23 14:24:03,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-23 14:24:03,899 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 98 [2018-01-23 14:24:03,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:24:03,900 INFO L225 Difference]: With dead ends: 176 [2018-01-23 14:24:03,900 INFO L226 Difference]: Without dead ends: 104 [2018-01-23 14:24:03,901 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=898, Invalid=1454, Unknown=0, NotChecked=0, Total=2352 [2018-01-23 14:24:03,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-01-23 14:24:03,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-01-23 14:24:03,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-01-23 14:24:03,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2018-01-23 14:24:03,908 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 98 [2018-01-23 14:24:03,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:24:03,909 INFO L432 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2018-01-23 14:24:03,909 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-01-23 14:24:03,909 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2018-01-23 14:24:03,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-01-23 14:24:03,910 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:24:03,910 INFO L322 BasicCegarLoop]: trace histogram [22, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:24:03,910 INFO L371 AbstractCegarLoop]: === Iteration 27 === [mainErr0EnsuresViolation]=== [2018-01-23 14:24:03,910 INFO L82 PathProgramCache]: Analyzing trace with hash -605150800, now seen corresponding path program 18 times [2018-01-23 14:24:03,910 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:24:03,911 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:24:03,911 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:24:03,911 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:24:03,912 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:24:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:24:03,928 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:24:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:24:04,379 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:24:04,379 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:24:04,384 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:24:04,398 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:04,407 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:04,418 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:04,445 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:04,509 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:04,655 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:04,803 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:05,066 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:05,375 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:05,671 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:06,200 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:07,239 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:07,242 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:24:07,248 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:24:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:24:07,502 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:24:07,502 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2018-01-23 14:24:07,502 INFO L409 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-01-23 14:24:07,503 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-01-23 14:24:07,503 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=1504, Unknown=0, NotChecked=0, Total=2450 [2018-01-23 14:24:07,503 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand 50 states. [2018-01-23 14:24:07,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:24:07,567 INFO L93 Difference]: Finished difference Result 177 states and 187 transitions. [2018-01-23 14:24:07,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-23 14:24:07,567 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 99 [2018-01-23 14:24:07,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:24:07,568 INFO L225 Difference]: With dead ends: 177 [2018-01-23 14:24:07,569 INFO L226 Difference]: Without dead ends: 105 [2018-01-23 14:24:07,570 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=973, Invalid=1577, Unknown=0, NotChecked=0, Total=2550 [2018-01-23 14:24:07,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-01-23 14:24:07,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-01-23 14:24:07,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-01-23 14:24:07,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2018-01-23 14:24:07,580 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 99 [2018-01-23 14:24:07,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:24:07,581 INFO L432 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2018-01-23 14:24:07,581 INFO L433 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-01-23 14:24:07,581 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2018-01-23 14:24:07,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-01-23 14:24:07,582 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:24:07,582 INFO L322 BasicCegarLoop]: trace histogram [23, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:24:07,582 INFO L371 AbstractCegarLoop]: === Iteration 28 === [mainErr0EnsuresViolation]=== [2018-01-23 14:24:07,582 INFO L82 PathProgramCache]: Analyzing trace with hash -755553753, now seen corresponding path program 19 times [2018-01-23 14:24:07,582 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:24:07,582 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:24:07,583 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:24:07,583 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:24:07,583 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:24:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:24:07,600 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:24:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:24:08,261 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:24:08,261 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:24:08,267 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:24:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:24:08,300 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:24:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:24:08,582 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:24:08,582 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2018-01-23 14:24:08,582 INFO L409 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-01-23 14:24:08,583 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-01-23 14:24:08,584 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=1629, Unknown=0, NotChecked=0, Total=2652 [2018-01-23 14:24:08,584 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand 52 states. [2018-01-23 14:24:08,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:24:08,671 INFO L93 Difference]: Finished difference Result 178 states and 188 transitions. [2018-01-23 14:24:08,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-23 14:24:08,671 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 100 [2018-01-23 14:24:08,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:24:08,672 INFO L225 Difference]: With dead ends: 178 [2018-01-23 14:24:08,672 INFO L226 Difference]: Without dead ends: 106 [2018-01-23 14:24:08,673 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1051, Invalid=1705, Unknown=0, NotChecked=0, Total=2756 [2018-01-23 14:24:08,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-01-23 14:24:08,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-01-23 14:24:08,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-01-23 14:24:08,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2018-01-23 14:24:08,680 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 100 [2018-01-23 14:24:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:24:08,680 INFO L432 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2018-01-23 14:24:08,680 INFO L433 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-01-23 14:24:08,680 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2018-01-23 14:24:08,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-01-23 14:24:08,680 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:24:08,680 INFO L322 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:24:08,681 INFO L371 AbstractCegarLoop]: === Iteration 29 === [mainErr0EnsuresViolation]=== [2018-01-23 14:24:08,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1123078000, now seen corresponding path program 20 times [2018-01-23 14:24:08,681 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:24:08,681 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:24:08,681 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:24:08,681 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:24:08,682 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:24:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:24:08,693 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:24:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:24:09,095 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:24:09,095 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:24:09,106 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:24:09,120 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:09,137 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:09,142 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:24:09,145 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:24:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:24:09,618 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:24:09,619 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2018-01-23 14:24:09,619 INFO L409 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-01-23 14:24:09,619 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-01-23 14:24:09,620 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1103, Invalid=1759, Unknown=0, NotChecked=0, Total=2862 [2018-01-23 14:24:09,620 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand 54 states. [2018-01-23 14:24:09,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:24:09,723 INFO L93 Difference]: Finished difference Result 179 states and 189 transitions. [2018-01-23 14:24:09,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-23 14:24:09,723 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 101 [2018-01-23 14:24:09,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:24:09,724 INFO L225 Difference]: With dead ends: 179 [2018-01-23 14:24:09,724 INFO L226 Difference]: Without dead ends: 107 [2018-01-23 14:24:09,725 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1132, Invalid=1838, Unknown=0, NotChecked=0, Total=2970 [2018-01-23 14:24:09,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-01-23 14:24:09,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-01-23 14:24:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-01-23 14:24:09,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2018-01-23 14:24:09,732 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 101 [2018-01-23 14:24:09,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:24:09,732 INFO L432 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2018-01-23 14:24:09,732 INFO L433 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-01-23 14:24:09,732 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2018-01-23 14:24:09,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-01-23 14:24:09,732 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:24:09,733 INFO L322 BasicCegarLoop]: trace histogram [25, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:24:09,733 INFO L371 AbstractCegarLoop]: === Iteration 30 === [mainErr0EnsuresViolation]=== [2018-01-23 14:24:09,733 INFO L82 PathProgramCache]: Analyzing trace with hash 368572231, now seen corresponding path program 21 times [2018-01-23 14:24:09,733 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:24:09,733 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:24:09,733 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:24:09,733 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:24:09,734 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:24:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:24:09,745 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:24:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:24:10,257 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:24:10,257 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:24:10,262 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:24:10,277 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:24:10,289 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:24:10,301 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:24:10,318 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:24:10,359 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:24:10,388 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:24:10,487 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:24:10,572 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:24:10,809 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:24:11,582 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:24:12,067 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:24:13,180 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:24:14,555 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:24:15,136 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:24:15,139 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:24:15,147 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:24:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:24:15,438 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:24:15,438 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2018-01-23 14:24:15,439 INFO L409 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-01-23 14:24:15,439 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-01-23 14:24:15,440 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1186, Invalid=1894, Unknown=0, NotChecked=0, Total=3080 [2018-01-23 14:24:15,440 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 56 states. [2018-01-23 14:24:15,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:24:15,512 INFO L93 Difference]: Finished difference Result 180 states and 190 transitions. [2018-01-23 14:24:15,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-23 14:24:15,512 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 102 [2018-01-23 14:24:15,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:24:15,513 INFO L225 Difference]: With dead ends: 180 [2018-01-23 14:24:15,513 INFO L226 Difference]: Without dead ends: 108 [2018-01-23 14:24:15,514 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1216, Invalid=1976, Unknown=0, NotChecked=0, Total=3192 [2018-01-23 14:24:15,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-01-23 14:24:15,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-01-23 14:24:15,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-01-23 14:24:15,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2018-01-23 14:24:15,520 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 102 [2018-01-23 14:24:15,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:24:15,520 INFO L432 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2018-01-23 14:24:15,520 INFO L433 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-01-23 14:24:15,520 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2018-01-23 14:24:15,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-01-23 14:24:15,521 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:24:15,521 INFO L322 BasicCegarLoop]: trace histogram [26, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:24:15,521 INFO L371 AbstractCegarLoop]: === Iteration 31 === [mainErr0EnsuresViolation]=== [2018-01-23 14:24:15,521 INFO L82 PathProgramCache]: Analyzing trace with hash -634910864, now seen corresponding path program 22 times [2018-01-23 14:24:15,521 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:24:15,521 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:24:15,522 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:24:15,522 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:24:15,522 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:24:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:24:15,534 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:24:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:24:15,969 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:24:15,969 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:24:15,974 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:24:17,291 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:24:17,296 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:24:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:24:17,608 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:24:17,608 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2018-01-23 14:24:17,608 INFO L409 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-01-23 14:24:17,608 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-01-23 14:24:17,609 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1272, Invalid=2034, Unknown=0, NotChecked=0, Total=3306 [2018-01-23 14:24:17,609 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 58 states. [2018-01-23 14:24:17,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:24:17,677 INFO L93 Difference]: Finished difference Result 181 states and 191 transitions. [2018-01-23 14:24:17,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-23 14:24:17,678 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 103 [2018-01-23 14:24:17,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:24:17,678 INFO L225 Difference]: With dead ends: 181 [2018-01-23 14:24:17,678 INFO L226 Difference]: Without dead ends: 109 [2018-01-23 14:24:17,679 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1303, Invalid=2119, Unknown=0, NotChecked=0, Total=3422 [2018-01-23 14:24:17,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-01-23 14:24:17,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-01-23 14:24:17,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-01-23 14:24:17,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2018-01-23 14:24:17,689 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 103 [2018-01-23 14:24:17,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:24:17,689 INFO L432 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2018-01-23 14:24:17,689 INFO L433 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-01-23 14:24:17,689 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2018-01-23 14:24:17,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-01-23 14:24:17,690 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:24:17,690 INFO L322 BasicCegarLoop]: trace histogram [27, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:24:17,690 INFO L371 AbstractCegarLoop]: === Iteration 32 === [mainErr0EnsuresViolation]=== [2018-01-23 14:24:17,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1678115737, now seen corresponding path program 23 times [2018-01-23 14:24:17,691 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:24:17,691 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:24:17,692 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:24:17,692 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:24:17,692 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:24:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:24:17,709 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:24:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:24:18,335 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:24:18,335 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:24:18,340 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:24:18,348 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:18,349 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:18,351 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:18,354 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:18,357 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:18,362 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:18,373 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:18,385 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:18,398 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:18,418 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:18,473 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:18,500 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:18,547 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:18,608 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:18,744 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:24:18,747 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:24:18,751 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:24:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:24:19,078 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:24:19,078 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2018-01-23 14:24:19,078 INFO L409 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-01-23 14:24:19,079 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-01-23 14:24:19,079 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1361, Invalid=2179, Unknown=0, NotChecked=0, Total=3540 [2018-01-23 14:24:19,079 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand 60 states. [2018-01-23 14:24:19,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:24:19,202 INFO L93 Difference]: Finished difference Result 182 states and 192 transitions. [2018-01-23 14:24:19,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-23 14:24:19,202 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 104 [2018-01-23 14:24:19,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:24:19,203 INFO L225 Difference]: With dead ends: 182 [2018-01-23 14:24:19,203 INFO L226 Difference]: Without dead ends: 110 [2018-01-23 14:24:19,204 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1393, Invalid=2267, Unknown=0, NotChecked=0, Total=3660 [2018-01-23 14:24:19,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-01-23 14:24:19,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-01-23 14:24:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-01-23 14:24:19,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2018-01-23 14:24:19,211 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 104 [2018-01-23 14:24:19,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:24:19,211 INFO L432 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2018-01-23 14:24:19,211 INFO L433 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-01-23 14:24:19,211 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2018-01-23 14:24:19,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-01-23 14:24:19,212 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:24:19,212 INFO L322 BasicCegarLoop]: trace histogram [28, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:24:19,212 INFO L371 AbstractCegarLoop]: === Iteration 33 === [mainErr0EnsuresViolation]=== [2018-01-23 14:24:19,212 INFO L82 PathProgramCache]: Analyzing trace with hash 342271568, now seen corresponding path program 24 times [2018-01-23 14:24:19,212 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:24:19,212 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:24:19,213 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:24:19,213 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:24:19,213 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:24:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:24:19,226 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:24:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-23 14:24:19,725 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:24:19,725 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:24:19,729 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:24:19,744 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:19,752 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:19,762 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:19,800 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:19,837 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:19,882 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:19,976 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:20,193 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:20,630 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:20,980 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:22,278 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command Received shutdown request... [2018-01-23 14:24:24,658 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:24:26,480 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command Cannot interrupt operation gracefully because timeout expired. Forcing shutdown