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/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/memsafety/20051113-1.c_false-valid-memtrack.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 11:54:54,162 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 11:54:54,164 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 11:54:54,178 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 11:54:54,178 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 11:54:54,179 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 11:54:54,181 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 11:54:54,182 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 11:54:54,185 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 11:54:54,186 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 11:54:54,186 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 11:54:54,187 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 11:54:54,187 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 11:54:54,188 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 11:54:54,189 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 11:54:54,191 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 11:54:54,193 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 11:54:54,195 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 11:54:54,197 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 11:54:54,198 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 11:54:54,200 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-24 11:54:54,205 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 11:54:54,206 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 11:54:54,206 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ.epf [2018-01-24 11:54:54,216 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 11:54:54,216 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 11:54:54,217 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 11:54:54,217 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 11:54:54,218 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 11:54:54,218 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 11:54:54,218 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 11:54:54,219 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 11:54:54,219 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 11:54:54,219 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 11:54:54,219 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 11:54:54,220 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 11:54:54,220 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 11:54:54,220 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 11:54:54,220 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 11:54:54,220 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 11:54:54,220 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 11:54:54,221 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 11:54:54,221 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 11:54:54,221 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 11:54:54,221 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 11:54:54,222 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 11:54:54,222 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 11:54:54,222 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 11:54:54,222 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 11:54:54,222 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 11:54:54,223 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 11:54:54,223 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 11:54:54,223 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-24 11:54:54,223 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 11:54:54,223 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 11:54:54,223 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 11:54:54,224 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 11:54:54,224 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 11:54:54,261 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 11:54:54,274 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 11:54:54,278 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 11:54:54,280 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 11:54:54,280 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 11:54:54,281 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/20051113-1.c_false-valid-memtrack.i [2018-01-24 11:54:54,501 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 11:54:54,507 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 11:54:54,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 11:54:54,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 11:54:54,513 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 11:54:54,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:54:54" (1/1) ... [2018-01-24 11:54:54,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7accd80d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:54:54, skipping insertion in model container [2018-01-24 11:54:54,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:54:54" (1/1) ... [2018-01-24 11:54:54,530 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 11:54:54,570 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 11:54:54,693 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 11:54:54,720 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 11:54:54,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:54:54 WrapperNode [2018-01-24 11:54:54,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 11:54:54,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 11:54:54,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 11:54:54,730 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 11:54:54,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:54:54" (1/1) ... [2018-01-24 11:54:54,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:54:54" (1/1) ... [2018-01-24 11:54:54,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:54:54" (1/1) ... [2018-01-24 11:54:54,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:54:54" (1/1) ... [2018-01-24 11:54:54,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:54:54" (1/1) ... [2018-01-24 11:54:54,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:54:54" (1/1) ... [2018-01-24 11:54:54,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:54:54" (1/1) ... [2018-01-24 11:54:54,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 11:54:54,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 11:54:54,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 11:54:54,771 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 11:54:54,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:54:54" (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 [2018-01-24 11:54:54,865 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 11:54:54,865 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 11:54:54,866 INFO L136 BoogieDeclarations]: Found implementation of procedure Sum [2018-01-24 11:54:54,866 INFO L136 BoogieDeclarations]: Found implementation of procedure Sum2 [2018-01-24 11:54:54,866 INFO L136 BoogieDeclarations]: Found implementation of procedure dummy_abort [2018-01-24 11:54:54,866 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 11:54:54,866 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 11:54:54,866 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 11:54:54,866 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 11:54:54,867 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 11:54:54,867 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 11:54:54,867 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-01-24 11:54:54,867 INFO L136 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-01-24 11:54:54,867 INFO L128 BoogieDeclarations]: Found specification of procedure memset [2018-01-24 11:54:54,867 INFO L128 BoogieDeclarations]: Found specification of procedure Sum [2018-01-24 11:54:54,867 INFO L128 BoogieDeclarations]: Found specification of procedure Sum2 [2018-01-24 11:54:54,868 INFO L128 BoogieDeclarations]: Found specification of procedure dummy_abort [2018-01-24 11:54:54,868 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 11:54:54,868 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 11:54:54,868 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 11:54:55,011 WARN L455 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-01-24 11:54:55,164 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 11:54:55,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:54:55 BoogieIcfgContainer [2018-01-24 11:54:55,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 11:54:55,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 11:54:55,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 11:54:55,168 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 11:54:55,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:54:54" (1/3) ... [2018-01-24 11:54:55,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb83945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:54:55, skipping insertion in model container [2018-01-24 11:54:55,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:54:54" (2/3) ... [2018-01-24 11:54:55,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb83945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:54:55, skipping insertion in model container [2018-01-24 11:54:55,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:54:55" (3/3) ... [2018-01-24 11:54:55,172 INFO L105 eAbstractionObserver]: Analyzing ICFG 20051113-1.c_false-valid-memtrack.i [2018-01-24 11:54:55,180 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 11:54:55,203 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 25 error locations. [2018-01-24 11:54:55,250 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 11:54:55,250 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 11:54:55,250 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 11:54:55,251 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 11:54:55,251 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 11:54:55,251 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 11:54:55,251 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 11:54:55,251 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 11:54:55,252 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 11:54:55,278 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2018-01-24 11:54:55,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 11:54:55,285 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:54:55,285 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:54:55,286 INFO L371 AbstractCegarLoop]: === Iteration 1 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:54:55,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1274877597, now seen corresponding path program 1 times [2018-01-24 11:54:55,293 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:54:55,294 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:54:55,360 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:55,360 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:54:55,360 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:54:55,417 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:54:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:54:55,483 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 11:54:55,483 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 11:54:55,485 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 11:54:55,500 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 11:54:55,501 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 11:54:55,503 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 4 states. [2018-01-24 11:54:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:54:55,851 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2018-01-24 11:54:55,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 11:54:55,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 11:54:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:54:55,861 INFO L225 Difference]: With dead ends: 111 [2018-01-24 11:54:55,861 INFO L226 Difference]: Without dead ends: 69 [2018-01-24 11:54:55,865 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 11:54:55,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-24 11:54:55,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-01-24 11:54:55,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-01-24 11:54:55,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2018-01-24 11:54:55,901 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 8 [2018-01-24 11:54:55,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:54:55,902 INFO L432 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2018-01-24 11:54:55,902 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 11:54:55,902 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2018-01-24 11:54:55,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 11:54:55,902 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:54:55,903 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:54:55,903 INFO L371 AbstractCegarLoop]: === Iteration 2 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:54:55,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1274877596, now seen corresponding path program 1 times [2018-01-24 11:54:55,903 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:54:55,904 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:54:55,905 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:55,912 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:54:55,912 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:54:55,928 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:54:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:54:55,986 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 11:54:55,987 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 11:54:55,988 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 11:54:55,988 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 11:54:55,989 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 11:54:55,989 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 4 states. [2018-01-24 11:54:56,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:54:56,142 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2018-01-24 11:54:56,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 11:54:56,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 11:54:56,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:54:56,144 INFO L225 Difference]: With dead ends: 69 [2018-01-24 11:54:56,145 INFO L226 Difference]: Without dead ends: 61 [2018-01-24 11:54:56,146 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 11:54:56,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-24 11:54:56,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-01-24 11:54:56,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-01-24 11:54:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2018-01-24 11:54:56,156 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 8 [2018-01-24 11:54:56,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:54:56,156 INFO L432 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2018-01-24 11:54:56,157 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 11:54:56,157 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2018-01-24 11:54:56,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 11:54:56,158 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:54:56,158 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] [2018-01-24 11:54:56,159 INFO L371 AbstractCegarLoop]: === Iteration 3 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:54:56,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1852712777, now seen corresponding path program 1 times [2018-01-24 11:54:56,159 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:54:56,159 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:54:56,160 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:56,160 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:54:56,160 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:54:56,182 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:54:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:54:56,228 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 11:54:56,228 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 11:54:56,228 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 11:54:56,228 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 11:54:56,229 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 11:54:56,229 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 5 states. [2018-01-24 11:54:56,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:54:56,365 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2018-01-24 11:54:56,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 11:54:56,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-01-24 11:54:56,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:54:56,368 INFO L225 Difference]: With dead ends: 61 [2018-01-24 11:54:56,369 INFO L226 Difference]: Without dead ends: 59 [2018-01-24 11:54:56,369 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-24 11:54:56,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-24 11:54:56,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-01-24 11:54:56,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-01-24 11:54:56,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2018-01-24 11:54:56,378 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 25 [2018-01-24 11:54:56,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:54:56,379 INFO L432 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2018-01-24 11:54:56,379 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 11:54:56,379 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2018-01-24 11:54:56,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 11:54:56,380 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:54:56,380 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] [2018-01-24 11:54:56,380 INFO L371 AbstractCegarLoop]: === Iteration 4 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:54:56,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1852712776, now seen corresponding path program 1 times [2018-01-24 11:54:56,381 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:54:56,381 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:54:56,382 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:56,382 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:54:56,382 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:54:56,405 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:54:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:54:56,549 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 11:54:56,549 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 11:54:56,550 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 11:54:56,550 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 11:54:56,550 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 11:54:56,550 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 6 states. [2018-01-24 11:54:56,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:54:56,693 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2018-01-24 11:54:56,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 11:54:56,694 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-01-24 11:54:56,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:54:56,695 INFO L225 Difference]: With dead ends: 59 [2018-01-24 11:54:56,695 INFO L226 Difference]: Without dead ends: 58 [2018-01-24 11:54:56,695 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-24 11:54:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-01-24 11:54:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-01-24 11:54:56,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-24 11:54:56,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2018-01-24 11:54:56,702 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 25 [2018-01-24 11:54:56,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:54:56,703 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2018-01-24 11:54:56,703 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 11:54:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2018-01-24 11:54:56,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-24 11:54:56,703 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:54:56,704 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:54:56,704 INFO L371 AbstractCegarLoop]: === Iteration 5 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:54:56,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1954449657, now seen corresponding path program 1 times [2018-01-24 11:54:56,704 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:54:56,704 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:54:56,705 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:56,705 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:54:56,705 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:54:56,732 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:54:57,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:54:57,118 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 11:54:57,118 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 11:54:57,118 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 11:54:57,119 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 11:54:57,119 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-01-24 11:54:57,119 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 9 states. [2018-01-24 11:54:57,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:54:57,295 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2018-01-24 11:54:57,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 11:54:57,295 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2018-01-24 11:54:57,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:54:57,296 INFO L225 Difference]: With dead ends: 93 [2018-01-24 11:54:57,296 INFO L226 Difference]: Without dead ends: 64 [2018-01-24 11:54:57,297 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-01-24 11:54:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-01-24 11:54:57,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2018-01-24 11:54:57,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-01-24 11:54:57,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2018-01-24 11:54:57,303 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 27 [2018-01-24 11:54:57,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:54:57,303 INFO L432 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2018-01-24 11:54:57,303 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 11:54:57,303 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2018-01-24 11:54:57,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-24 11:54:57,304 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:54:57,304 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:54:57,304 INFO L371 AbstractCegarLoop]: === Iteration 6 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:54:57,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1339860797, now seen corresponding path program 1 times [2018-01-24 11:54:57,305 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:54:57,305 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:54:57,306 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:57,306 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:54:57,306 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:54:57,324 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:54:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:54:57,522 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:54:57,522 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 [2018-01-24 11:54:57,531 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:54:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:54:57,565 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:54:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-24 11:54:57,616 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-24 11:54:57,617 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2018-01-24 11:54:57,617 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 11:54:57,617 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 11:54:57,617 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-01-24 11:54:57,618 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 9 states. [2018-01-24 11:54:57,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:54:57,864 INFO L93 Difference]: Finished difference Result 125 states and 137 transitions. [2018-01-24 11:54:57,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 11:54:57,864 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-01-24 11:54:57,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:54:57,867 INFO L225 Difference]: With dead ends: 125 [2018-01-24 11:54:57,867 INFO L226 Difference]: Without dead ends: 74 [2018-01-24 11:54:57,868 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-01-24 11:54:57,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-01-24 11:54:57,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2018-01-24 11:54:57,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-01-24 11:54:57,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2018-01-24 11:54:57,878 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 33 [2018-01-24 11:54:57,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:54:57,878 INFO L432 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2018-01-24 11:54:57,878 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 11:54:57,878 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2018-01-24 11:54:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-24 11:54:57,880 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:54:57,880 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] [2018-01-24 11:54:57,880 INFO L371 AbstractCegarLoop]: === Iteration 7 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:54:57,880 INFO L82 PathProgramCache]: Analyzing trace with hash 919563422, now seen corresponding path program 1 times [2018-01-24 11:54:57,881 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:54:57,881 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:54:57,881 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:57,882 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:54:57,882 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:54:57,902 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:54:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-24 11:54:57,972 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 11:54:57,973 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 11:54:57,973 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 11:54:57,973 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 11:54:57,974 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 11:54:57,974 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 5 states. [2018-01-24 11:54:58,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:54:58,154 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2018-01-24 11:54:58,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 11:54:58,154 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2018-01-24 11:54:58,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:54:58,155 INFO L225 Difference]: With dead ends: 69 [2018-01-24 11:54:58,155 INFO L226 Difference]: Without dead ends: 67 [2018-01-24 11:54:58,156 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-24 11:54:58,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-01-24 11:54:58,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-01-24 11:54:58,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-01-24 11:54:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2018-01-24 11:54:58,164 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 41 [2018-01-24 11:54:58,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:54:58,165 INFO L432 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2018-01-24 11:54:58,165 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 11:54:58,165 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2018-01-24 11:54:58,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-24 11:54:58,166 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:54:58,166 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] [2018-01-24 11:54:58,166 INFO L371 AbstractCegarLoop]: === Iteration 8 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:54:58,167 INFO L82 PathProgramCache]: Analyzing trace with hash 919563423, now seen corresponding path program 1 times [2018-01-24 11:54:58,167 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:54:58,167 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:54:58,168 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:58,168 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:54:58,168 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:54:58,184 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:54:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-24 11:54:58,275 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 11:54:58,275 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 11:54:58,276 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 11:54:58,276 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 11:54:58,276 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 11:54:58,276 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 6 states. [2018-01-24 11:54:58,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:54:58,391 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2018-01-24 11:54:58,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 11:54:58,392 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2018-01-24 11:54:58,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:54:58,393 INFO L225 Difference]: With dead ends: 67 [2018-01-24 11:54:58,393 INFO L226 Difference]: Without dead ends: 66 [2018-01-24 11:54:58,393 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-24 11:54:58,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-01-24 11:54:58,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-01-24 11:54:58,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-24 11:54:58,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2018-01-24 11:54:58,399 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 41 [2018-01-24 11:54:58,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:54:58,399 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2018-01-24 11:54:58,399 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 11:54:58,399 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2018-01-24 11:54:58,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-01-24 11:54:58,400 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:54:58,401 INFO L322 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2018-01-24 11:54:58,401 INFO L371 AbstractCegarLoop]: === Iteration 9 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:54:58,401 INFO L82 PathProgramCache]: Analyzing trace with hash -435672114, now seen corresponding path program 1 times [2018-01-24 11:54:58,401 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:54:58,401 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:54:58,402 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:58,402 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:54:58,402 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:54:58,420 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:54:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-01-24 11:54:58,711 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:54:58,711 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 [2018-01-24 11:54:58,716 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:54:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:54:58,739 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:54:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-01-24 11:54:58,800 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:54:58,800 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2018-01-24 11:54:58,801 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-24 11:54:58,801 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-24 11:54:58,801 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-01-24 11:54:58,801 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 11 states. [2018-01-24 11:54:59,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:54:59,177 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2018-01-24 11:54:59,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-24 11:54:59,178 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2018-01-24 11:54:59,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:54:59,179 INFO L225 Difference]: With dead ends: 135 [2018-01-24 11:54:59,179 INFO L226 Difference]: Without dead ends: 81 [2018-01-24 11:54:59,180 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2018-01-24 11:54:59,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-01-24 11:54:59,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2018-01-24 11:54:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-01-24 11:54:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2018-01-24 11:54:59,189 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 40 [2018-01-24 11:54:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:54:59,190 INFO L432 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2018-01-24 11:54:59,190 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-24 11:54:59,190 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2018-01-24 11:54:59,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-24 11:54:59,191 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:54:59,191 INFO L322 BasicCegarLoop]: trace histogram [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] [2018-01-24 11:54:59,191 INFO L371 AbstractCegarLoop]: === Iteration 10 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:54:59,192 INFO L82 PathProgramCache]: Analyzing trace with hash 2111534509, now seen corresponding path program 1 times [2018-01-24 11:54:59,192 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:54:59,192 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:54:59,193 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:59,193 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:54:59,193 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:54:59,211 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:54:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-01-24 11:54:59,505 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:54:59,505 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 [2018-01-24 11:54:59,510 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:54:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:54:59,531 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:54:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-24 11:54:59,588 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:54:59,588 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 16 [2018-01-24 11:54:59,589 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-24 11:54:59,589 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-24 11:54:59,589 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2018-01-24 11:54:59,589 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 16 states. [2018-01-24 11:54:59,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:54:59,966 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2018-01-24 11:54:59,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-24 11:54:59,967 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-01-24 11:54:59,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:54:59,967 INFO L225 Difference]: With dead ends: 143 [2018-01-24 11:54:59,968 INFO L226 Difference]: Without dead ends: 83 [2018-01-24 11:54:59,968 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2018-01-24 11:54:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-01-24 11:54:59,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2018-01-24 11:54:59,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-01-24 11:54:59,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2018-01-24 11:54:59,977 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 44 [2018-01-24 11:54:59,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:54:59,977 INFO L432 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2018-01-24 11:54:59,977 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-24 11:54:59,978 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2018-01-24 11:54:59,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-24 11:54:59,978 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:54:59,978 INFO L322 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2018-01-24 11:54:59,979 INFO L371 AbstractCegarLoop]: === Iteration 11 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:54:59,979 INFO L82 PathProgramCache]: Analyzing trace with hash -763701070, now seen corresponding path program 2 times [2018-01-24 11:54:59,979 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:54:59,979 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:54:59,980 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:59,980 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:54:59,980 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:54:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:54:59,996 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:00,280 WARN L146 SmtUtils]: Spent 103ms on a formula simplification. DAG size of input: 21 DAG size of output 13 [2018-01-24 11:55:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-01-24 11:55:00,381 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:00,381 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 [2018-01-24 11:55:00,393 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 11:55:00,405 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:00,419 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:00,420 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:00,422 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-01-24 11:55:00,535 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:00,536 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2018-01-24 11:55:00,536 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-24 11:55:00,536 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-24 11:55:00,536 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2018-01-24 11:55:00,536 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand 19 states. [2018-01-24 11:55:00,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:00,978 INFO L93 Difference]: Finished difference Result 141 states and 158 transitions. [2018-01-24 11:55:00,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-24 11:55:00,979 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2018-01-24 11:55:00,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:00,980 INFO L225 Difference]: With dead ends: 141 [2018-01-24 11:55:00,980 INFO L226 Difference]: Without dead ends: 77 [2018-01-24 11:55:00,981 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2018-01-24 11:55:00,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-01-24 11:55:00,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-01-24 11:55:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-24 11:55:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2018-01-24 11:55:00,988 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 48 [2018-01-24 11:55:00,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:00,988 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2018-01-24 11:55:00,988 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-24 11:55:00,988 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2018-01-24 11:55:00,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-24 11:55:00,989 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:00,990 INFO L322 BasicCegarLoop]: trace histogram [4, 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] [2018-01-24 11:55:00,990 INFO L371 AbstractCegarLoop]: === Iteration 12 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:00,990 INFO L82 PathProgramCache]: Analyzing trace with hash 2106198684, now seen corresponding path program 1 times [2018-01-24 11:55:00,990 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:00,990 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:00,991 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:00,991 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:00,991 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:01,006 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-01-24 11:55:01,093 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 11:55:01,093 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 11:55:01,093 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 11:55:01,093 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 11:55:01,093 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 11:55:01,093 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand 5 states. [2018-01-24 11:55:01,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:01,124 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2018-01-24 11:55:01,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 11:55:01,124 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2018-01-24 11:55:01,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:01,125 INFO L225 Difference]: With dead ends: 86 [2018-01-24 11:55:01,125 INFO L226 Difference]: Without dead ends: 83 [2018-01-24 11:55:01,126 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 [2018-01-24 11:55:01,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-01-24 11:55:01,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2018-01-24 11:55:01,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-01-24 11:55:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2018-01-24 11:55:01,131 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 52 [2018-01-24 11:55:01,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:01,131 INFO L432 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2018-01-24 11:55:01,131 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 11:55:01,131 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2018-01-24 11:55:01,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-24 11:55:01,132 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:01,132 INFO L322 BasicCegarLoop]: trace histogram [4, 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] [2018-01-24 11:55:01,132 INFO L371 AbstractCegarLoop]: === Iteration 13 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:01,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1604645521, now seen corresponding path program 1 times [2018-01-24 11:55:01,132 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:01,133 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:01,133 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:01,133 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:55:01,133 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:01,148 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-01-24 11:55:01,477 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:01,477 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 [2018-01-24 11:55:01,484 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:55:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:01,518 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-01-24 11:55:01,669 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:01,670 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 19 [2018-01-24 11:55:01,670 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-24 11:55:01,670 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-24 11:55:01,671 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2018-01-24 11:55:01,671 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand 19 states. [2018-01-24 11:55:03,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:03,012 INFO L93 Difference]: Finished difference Result 151 states and 166 transitions. [2018-01-24 11:55:03,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-24 11:55:03,012 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2018-01-24 11:55:03,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:03,013 INFO L225 Difference]: With dead ends: 151 [2018-01-24 11:55:03,013 INFO L226 Difference]: Without dead ends: 84 [2018-01-24 11:55:03,014 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2018-01-24 11:55:03,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-01-24 11:55:03,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2018-01-24 11:55:03,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-01-24 11:55:03,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2018-01-24 11:55:03,022 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 52 [2018-01-24 11:55:03,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:03,022 INFO L432 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2018-01-24 11:55:03,022 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-24 11:55:03,022 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2018-01-24 11:55:03,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-24 11:55:03,024 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:03,024 INFO L322 BasicCegarLoop]: trace histogram [5, 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, 1] [2018-01-24 11:55:03,024 INFO L371 AbstractCegarLoop]: === Iteration 14 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:03,024 INFO L82 PathProgramCache]: Analyzing trace with hash -544800124, now seen corresponding path program 1 times [2018-01-24 11:55:03,024 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:03,024 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:03,025 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:03,026 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:55:03,026 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:03,042 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-01-24 11:55:03,296 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:03,296 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 [2018-01-24 11:55:03,305 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:55:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:03,340 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-24 11:55:03,471 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:03,472 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-01-24 11:55:03,473 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-24 11:55:03,473 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-24 11:55:03,473 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2018-01-24 11:55:03,473 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 16 states. [2018-01-24 11:55:03,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:03,655 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2018-01-24 11:55:03,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-24 11:55:03,656 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 56 [2018-01-24 11:55:03,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:03,656 INFO L225 Difference]: With dead ends: 148 [2018-01-24 11:55:03,656 INFO L226 Difference]: Without dead ends: 80 [2018-01-24 11:55:03,657 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2018-01-24 11:55:03,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-01-24 11:55:03,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2018-01-24 11:55:03,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-24 11:55:03,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2018-01-24 11:55:03,662 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 56 [2018-01-24 11:55:03,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:03,663 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2018-01-24 11:55:03,663 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-24 11:55:03,663 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2018-01-24 11:55:03,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-01-24 11:55:03,663 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:03,664 INFO L322 BasicCegarLoop]: trace histogram [6, 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] [2018-01-24 11:55:03,664 INFO L371 AbstractCegarLoop]: === Iteration 15 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:03,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1454707584, now seen corresponding path program 1 times [2018-01-24 11:55:03,664 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:03,664 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:03,665 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:03,665 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:55:03,665 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:03,677 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-24 11:55:03,929 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:03,929 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 [2018-01-24 11:55:03,941 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:55:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:03,971 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-01-24 11:55:04,169 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:04,169 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2018-01-24 11:55:04,170 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-24 11:55:04,170 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-24 11:55:04,170 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-01-24 11:55:04,170 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand 17 states. [2018-01-24 11:55:04,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:04,477 INFO L93 Difference]: Finished difference Result 150 states and 163 transitions. [2018-01-24 11:55:04,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-24 11:55:04,477 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 60 [2018-01-24 11:55:04,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:04,478 INFO L225 Difference]: With dead ends: 150 [2018-01-24 11:55:04,478 INFO L226 Difference]: Without dead ends: 87 [2018-01-24 11:55:04,479 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2018-01-24 11:55:04,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-01-24 11:55:04,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2018-01-24 11:55:04,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-01-24 11:55:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2018-01-24 11:55:04,493 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 60 [2018-01-24 11:55:04,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:04,493 INFO L432 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2018-01-24 11:55:04,493 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-24 11:55:04,494 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2018-01-24 11:55:04,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-01-24 11:55:04,495 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:04,495 INFO L322 BasicCegarLoop]: trace histogram [7, 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, 1] [2018-01-24 11:55:04,495 INFO L371 AbstractCegarLoop]: === Iteration 16 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:04,495 INFO L82 PathProgramCache]: Analyzing trace with hash -374403177, now seen corresponding path program 2 times [2018-01-24 11:55:04,495 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:04,495 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:04,496 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:04,496 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:55:04,496 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:04,521 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:05,224 WARN L146 SmtUtils]: Spent 235ms on a formula simplification. DAG size of input: 21 DAG size of output 19 [2018-01-24 11:55:05,465 WARN L146 SmtUtils]: Spent 142ms on a formula simplification. DAG size of input: 19 DAG size of output 17 [2018-01-24 11:55:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-01-24 11:55:05,534 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:05,534 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 [2018-01-24 11:55:05,541 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 11:55:05,567 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:05,581 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:05,583 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:05,587 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-01-24 11:55:05,731 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:05,732 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2018-01-24 11:55:05,732 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-24 11:55:05,732 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-24 11:55:05,732 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2018-01-24 11:55:05,732 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 19 states. [2018-01-24 11:55:06,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:06,005 INFO L93 Difference]: Finished difference Result 154 states and 166 transitions. [2018-01-24 11:55:06,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-24 11:55:06,006 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2018-01-24 11:55:06,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:06,007 INFO L225 Difference]: With dead ends: 154 [2018-01-24 11:55:06,007 INFO L226 Difference]: Without dead ends: 85 [2018-01-24 11:55:06,007 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2018-01-24 11:55:06,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-01-24 11:55:06,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-01-24 11:55:06,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-01-24 11:55:06,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2018-01-24 11:55:06,013 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 67 [2018-01-24 11:55:06,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:06,014 INFO L432 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2018-01-24 11:55:06,014 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-24 11:55:06,014 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2018-01-24 11:55:06,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-01-24 11:55:06,014 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:06,014 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, 1] [2018-01-24 11:55:06,015 INFO L371 AbstractCegarLoop]: === Iteration 17 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:06,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1696068192, now seen corresponding path program 3 times [2018-01-24 11:55:06,015 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:06,015 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:06,015 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:06,016 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:06,016 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:06,031 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-01-24 11:55:06,247 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:06,247 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 [2018-01-24 11:55:06,252 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-24 11:55:06,268 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:06,282 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:06,294 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:06,296 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:06,299 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:06,349 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 [2018-01-24 11:55:06,354 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 [2018-01-24 11:55:06,355 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 11:55:06,357 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:55:06,360 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:55:06,360 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2018-01-24 11:55:06,377 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 [2018-01-24 11:55:06,386 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,387 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,390 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 [2018-01-24 11:55:06,390 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 11:55:06,395 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:55:06,400 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:55:06,400 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2018-01-24 11:55:06,469 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 [2018-01-24 11:55:06,474 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,480 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,481 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,482 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,483 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,486 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,487 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 [2018-01-24 11:55:06,488 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 11:55:06,544 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:55:06,550 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:55:06,551 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2018-01-24 11:55:06,578 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 [2018-01-24 11:55:06,581 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,582 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,582 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,583 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,584 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,584 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,585 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,586 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,587 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,587 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,588 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,589 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,590 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 [2018-01-24 11:55:06,591 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 11:55:06,624 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:55:06,634 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:55:06,634 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2018-01-24 11:55:06,673 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 [2018-01-24 11:55:06,682 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,683 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,685 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,686 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,686 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,687 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,687 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,688 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,689 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,690 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,703 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,704 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,705 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,705 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,706 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,707 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,708 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 [2018-01-24 11:55:06,709 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 11:55:06,747 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:55:06,755 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:55:06,755 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:47 [2018-01-24 11:55:06,824 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 [2018-01-24 11:55:06,830 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,831 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,832 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,834 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,835 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,836 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,837 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,838 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,839 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,840 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,841 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,842 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,843 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,844 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,846 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,847 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,848 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,849 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,851 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,851 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,852 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:06,854 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 [2018-01-24 11:55:06,855 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 11:55:06,956 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:55:06,970 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:55:06,970 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:60, output treesize:56 [2018-01-24 11:55:07,091 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 [2018-01-24 11:55:07,099 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,100 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,101 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,101 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,102 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,103 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,103 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,104 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,105 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,105 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,106 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,107 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,107 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,108 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,109 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,109 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,110 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,111 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,111 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,112 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,125 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,130 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,131 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,132 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,133 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,134 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,135 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 11:55:07,137 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 [2018-01-24 11:55:07,139 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 11:55:07,226 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:55:07,326 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:55:07,327 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:69, output treesize:65 [2018-01-24 11:55:08,029 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-01-24 11:55:08,030 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 11:55:08,030 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 11:55:08,031 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:121, output treesize:1 [2018-01-24 11:55:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-01-24 11:55:08,091 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:08,091 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2018-01-24 11:55:08,091 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-24 11:55:08,092 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-24 11:55:08,092 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2018-01-24 11:55:08,092 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand 28 states. [2018-01-24 11:55:08,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:08,959 INFO L93 Difference]: Finished difference Result 130 states and 139 transitions. [2018-01-24 11:55:08,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-24 11:55:08,960 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 74 [2018-01-24 11:55:08,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:08,960 INFO L225 Difference]: With dead ends: 130 [2018-01-24 11:55:08,960 INFO L226 Difference]: Without dead ends: 94 [2018-01-24 11:55:08,961 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 61 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=336, Invalid=2114, Unknown=0, NotChecked=0, Total=2450 [2018-01-24 11:55:08,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-01-24 11:55:08,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2018-01-24 11:55:08,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-01-24 11:55:08,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2018-01-24 11:55:08,969 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 74 [2018-01-24 11:55:08,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:08,970 INFO L432 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2018-01-24 11:55:08,970 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-24 11:55:08,970 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2018-01-24 11:55:08,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-01-24 11:55:08,971 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:08,971 INFO L322 BasicCegarLoop]: trace histogram [8, 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, 1] [2018-01-24 11:55:08,971 INFO L371 AbstractCegarLoop]: === Iteration 18 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:08,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1151371872, now seen corresponding path program 4 times [2018-01-24 11:55:08,972 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:08,972 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:08,973 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:08,973 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:08,973 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:08,993 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:09,249 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:09,249 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 [2018-01-24 11:55:09,265 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-24 11:55:09,308 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:10,815 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:10,944 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:10,944 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-01-24 11:55:10,945 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-24 11:55:10,945 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-24 11:55:10,945 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-01-24 11:55:10,945 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 22 states. [2018-01-24 11:55:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:10,976 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2018-01-24 11:55:10,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-24 11:55:10,977 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 86 [2018-01-24 11:55:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:10,978 INFO L225 Difference]: With dead ends: 164 [2018-01-24 11:55:10,978 INFO L226 Difference]: Without dead ends: 92 [2018-01-24 11:55:10,978 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2018-01-24 11:55:10,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-01-24 11:55:10,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-01-24 11:55:10,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-01-24 11:55:10,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2018-01-24 11:55:10,984 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 86 [2018-01-24 11:55:10,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:10,984 INFO L432 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2018-01-24 11:55:10,984 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-24 11:55:10,984 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2018-01-24 11:55:10,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-01-24 11:55:10,985 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:10,985 INFO L322 BasicCegarLoop]: trace histogram [9, 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, 1] [2018-01-24 11:55:10,985 INFO L371 AbstractCegarLoop]: === Iteration 19 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:10,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1429474957, now seen corresponding path program 5 times [2018-01-24 11:55:10,986 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:10,986 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:10,986 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:10,986 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:10,986 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:11,001 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:11,216 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:11,216 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 [2018-01-24 11:55:11,223 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-24 11:55:11,231 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:11,235 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:11,239 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:11,244 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:11,253 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:11,268 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:11,271 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:11,274 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:11,451 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:11,451 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2018-01-24 11:55:11,452 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-24 11:55:11,452 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-24 11:55:11,452 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2018-01-24 11:55:11,452 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 24 states. [2018-01-24 11:55:11,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:11,505 INFO L93 Difference]: Finished difference Result 165 states and 173 transitions. [2018-01-24 11:55:11,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-24 11:55:11,505 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 87 [2018-01-24 11:55:11,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:11,506 INFO L225 Difference]: With dead ends: 165 [2018-01-24 11:55:11,506 INFO L226 Difference]: Without dead ends: 93 [2018-01-24 11:55:11,506 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=368, Unknown=0, NotChecked=0, Total=600 [2018-01-24 11:55:11,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-01-24 11:55:11,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-01-24 11:55:11,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-01-24 11:55:11,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2018-01-24 11:55:11,513 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 87 [2018-01-24 11:55:11,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:11,513 INFO L432 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2018-01-24 11:55:11,513 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-24 11:55:11,513 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2018-01-24 11:55:11,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-01-24 11:55:11,514 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:11,514 INFO L322 BasicCegarLoop]: trace histogram [10, 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, 1] [2018-01-24 11:55:11,514 INFO L371 AbstractCegarLoop]: === Iteration 20 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:11,514 INFO L82 PathProgramCache]: Analyzing trace with hash 168651968, now seen corresponding path program 6 times [2018-01-24 11:55:11,514 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:11,514 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:11,515 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:11,515 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:11,515 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:11,530 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:11,683 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:11,683 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 [2018-01-24 11:55:11,689 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-24 11:55:11,712 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:11,727 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:11,742 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:11,773 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:11,821 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:11,952 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:11,953 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:11,957 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:12,060 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:12,060 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2018-01-24 11:55:12,060 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-24 11:55:12,061 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-24 11:55:12,061 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=394, Unknown=0, NotChecked=0, Total=650 [2018-01-24 11:55:12,061 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 26 states. [2018-01-24 11:55:12,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:12,110 INFO L93 Difference]: Finished difference Result 166 states and 174 transitions. [2018-01-24 11:55:12,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-24 11:55:12,111 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 88 [2018-01-24 11:55:12,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:12,112 INFO L225 Difference]: With dead ends: 166 [2018-01-24 11:55:12,112 INFO L226 Difference]: Without dead ends: 94 [2018-01-24 11:55:12,112 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=271, Invalid=431, Unknown=0, NotChecked=0, Total=702 [2018-01-24 11:55:12,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-01-24 11:55:12,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-01-24 11:55:12,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-01-24 11:55:12,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2018-01-24 11:55:12,121 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 88 [2018-01-24 11:55:12,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:12,121 INFO L432 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2018-01-24 11:55:12,121 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-24 11:55:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2018-01-24 11:55:12,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-01-24 11:55:12,122 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:12,123 INFO L322 BasicCegarLoop]: trace histogram [11, 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, 1] [2018-01-24 11:55:12,123 INFO L371 AbstractCegarLoop]: === Iteration 21 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:12,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1829020909, now seen corresponding path program 7 times [2018-01-24 11:55:12,123 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:12,123 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:12,124 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:12,124 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:12,124 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:12,145 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:12,303 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:12,303 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 [2018-01-24 11:55:12,311 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:55:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:12,359 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:12,500 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:12,500 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2018-01-24 11:55:12,500 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-24 11:55:12,501 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-24 11:55:12,501 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=459, Unknown=0, NotChecked=0, Total=756 [2018-01-24 11:55:12,501 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 28 states. [2018-01-24 11:55:12,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:12,544 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2018-01-24 11:55:12,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-24 11:55:12,545 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 89 [2018-01-24 11:55:12,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:12,546 INFO L225 Difference]: With dead ends: 167 [2018-01-24 11:55:12,546 INFO L226 Difference]: Without dead ends: 95 [2018-01-24 11:55:12,547 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2018-01-24 11:55:12,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-01-24 11:55:12,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-01-24 11:55:12,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-01-24 11:55:12,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2018-01-24 11:55:12,554 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 89 [2018-01-24 11:55:12,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:12,554 INFO L432 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2018-01-24 11:55:12,554 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-24 11:55:12,554 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2018-01-24 11:55:12,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-01-24 11:55:12,555 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:12,555 INFO L322 BasicCegarLoop]: trace histogram [12, 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, 1] [2018-01-24 11:55:12,555 INFO L371 AbstractCegarLoop]: === Iteration 22 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:12,556 INFO L82 PathProgramCache]: Analyzing trace with hash 667629344, now seen corresponding path program 8 times [2018-01-24 11:55:12,556 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:12,556 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:12,557 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:12,557 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:55:12,557 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:12,577 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:12,808 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:12,808 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 [2018-01-24 11:55:12,814 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 11:55:12,828 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:12,844 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:12,846 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:12,848 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:12,958 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:12,958 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2018-01-24 11:55:12,959 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-24 11:55:12,959 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-24 11:55:12,959 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=529, Unknown=0, NotChecked=0, Total=870 [2018-01-24 11:55:12,959 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 30 states. [2018-01-24 11:55:13,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:13,001 INFO L93 Difference]: Finished difference Result 168 states and 176 transitions. [2018-01-24 11:55:13,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-24 11:55:13,003 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 90 [2018-01-24 11:55:13,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:13,003 INFO L225 Difference]: With dead ends: 168 [2018-01-24 11:55:13,003 INFO L226 Difference]: Without dead ends: 96 [2018-01-24 11:55:13,004 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=358, Invalid=572, Unknown=0, NotChecked=0, Total=930 [2018-01-24 11:55:13,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-01-24 11:55:13,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-01-24 11:55:13,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-01-24 11:55:13,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2018-01-24 11:55:13,010 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 90 [2018-01-24 11:55:13,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:13,010 INFO L432 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2018-01-24 11:55:13,010 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-24 11:55:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2018-01-24 11:55:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-01-24 11:55:13,011 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:13,011 INFO L322 BasicCegarLoop]: trace histogram [13, 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, 1] [2018-01-24 11:55:13,011 INFO L371 AbstractCegarLoop]: === Iteration 23 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:13,011 INFO L82 PathProgramCache]: Analyzing trace with hash 754375859, now seen corresponding path program 9 times [2018-01-24 11:55:13,011 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:13,012 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:13,012 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:13,012 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:13,012 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:13,026 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:13,301 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:13,301 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 [2018-01-24 11:55:13,307 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-24 11:55:13,322 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:13,335 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:13,352 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:13,367 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:13,397 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:13,432 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:13,682 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:13,773 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:13,774 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:13,778 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:13,930 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:13,930 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2018-01-24 11:55:13,930 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-24 11:55:13,931 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-24 11:55:13,931 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=604, Unknown=0, NotChecked=0, Total=992 [2018-01-24 11:55:13,931 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 32 states. [2018-01-24 11:55:13,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:13,995 INFO L93 Difference]: Finished difference Result 169 states and 177 transitions. [2018-01-24 11:55:13,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-24 11:55:13,995 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 91 [2018-01-24 11:55:13,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:13,996 INFO L225 Difference]: With dead ends: 169 [2018-01-24 11:55:13,996 INFO L226 Difference]: Without dead ends: 97 [2018-01-24 11:55:13,997 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=650, Unknown=0, NotChecked=0, Total=1056 [2018-01-24 11:55:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-01-24 11:55:14,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-01-24 11:55:14,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-01-24 11:55:14,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2018-01-24 11:55:14,003 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 91 [2018-01-24 11:55:14,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:14,003 INFO L432 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2018-01-24 11:55:14,003 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-24 11:55:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2018-01-24 11:55:14,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-01-24 11:55:14,004 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:14,004 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, 1] [2018-01-24 11:55:14,005 INFO L371 AbstractCegarLoop]: === Iteration 24 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:14,005 INFO L82 PathProgramCache]: Analyzing trace with hash -851449472, now seen corresponding path program 10 times [2018-01-24 11:55:14,005 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:14,005 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:14,006 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:14,006 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:14,006 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:14,024 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:14,231 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:14,231 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:14,231 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 [2018-01-24 11:55:14,236 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-24 11:55:14,301 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:14,304 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:14,448 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:14,448 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2018-01-24 11:55:14,448 INFO L409 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-01-24 11:55:14,448 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-01-24 11:55:14,449 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=684, Unknown=0, NotChecked=0, Total=1122 [2018-01-24 11:55:14,449 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 34 states. [2018-01-24 11:55:14,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:14,499 INFO L93 Difference]: Finished difference Result 170 states and 178 transitions. [2018-01-24 11:55:14,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-24 11:55:14,500 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 92 [2018-01-24 11:55:14,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:14,500 INFO L225 Difference]: With dead ends: 170 [2018-01-24 11:55:14,500 INFO L226 Difference]: Without dead ends: 98 [2018-01-24 11:55:14,501 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=457, Invalid=733, Unknown=0, NotChecked=0, Total=1190 [2018-01-24 11:55:14,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-01-24 11:55:14,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-01-24 11:55:14,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-01-24 11:55:14,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2018-01-24 11:55:14,506 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 92 [2018-01-24 11:55:14,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:14,506 INFO L432 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2018-01-24 11:55:14,506 INFO L433 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-01-24 11:55:14,506 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2018-01-24 11:55:14,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-01-24 11:55:14,507 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:14,507 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, 1] [2018-01-24 11:55:14,507 INFO L371 AbstractCegarLoop]: === Iteration 25 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:14,507 INFO L82 PathProgramCache]: Analyzing trace with hash 907572819, now seen corresponding path program 11 times [2018-01-24 11:55:14,507 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:14,507 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:14,508 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:14,508 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:14,508 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:14,525 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:14,890 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:14,891 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 [2018-01-24 11:55:14,896 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-24 11:55:14,905 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:14,906 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:14,908 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:14,910 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:14,914 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:14,922 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:14,932 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:14,962 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:14,978 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:14,981 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:14,983 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:15,141 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:15,141 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2018-01-24 11:55:15,142 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-01-24 11:55:15,142 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-01-24 11:55:15,142 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=769, Unknown=0, NotChecked=0, Total=1260 [2018-01-24 11:55:15,143 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 36 states. [2018-01-24 11:55:15,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:15,194 INFO L93 Difference]: Finished difference Result 171 states and 179 transitions. [2018-01-24 11:55:15,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-24 11:55:15,196 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 93 [2018-01-24 11:55:15,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:15,197 INFO L225 Difference]: With dead ends: 171 [2018-01-24 11:55:15,197 INFO L226 Difference]: Without dead ends: 99 [2018-01-24 11:55:15,197 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=511, Invalid=821, Unknown=0, NotChecked=0, Total=1332 [2018-01-24 11:55:15,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-01-24 11:55:15,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-01-24 11:55:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-01-24 11:55:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2018-01-24 11:55:15,203 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 93 [2018-01-24 11:55:15,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:15,203 INFO L432 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2018-01-24 11:55:15,203 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-01-24 11:55:15,203 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2018-01-24 11:55:15,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-01-24 11:55:15,204 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:15,204 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, 1] [2018-01-24 11:55:15,204 INFO L371 AbstractCegarLoop]: === Iteration 26 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:15,204 INFO L82 PathProgramCache]: Analyzing trace with hash -397311008, now seen corresponding path program 12 times [2018-01-24 11:55:15,204 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:15,204 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:15,205 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:15,205 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:15,205 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:15,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:15,219 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:15,577 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:15,577 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 [2018-01-24 11:55:15,581 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-24 11:55:15,597 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:15,605 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:15,613 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:15,651 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:15,672 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:15,706 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:15,748 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:15,850 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:15,971 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:15,972 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:15,976 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:16,344 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:16,344 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2018-01-24 11:55:16,345 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-01-24 11:55:16,345 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-01-24 11:55:16,345 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=859, Unknown=0, NotChecked=0, Total=1406 [2018-01-24 11:55:16,345 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 38 states. [2018-01-24 11:55:16,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:16,421 INFO L93 Difference]: Finished difference Result 172 states and 180 transitions. [2018-01-24 11:55:16,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-24 11:55:16,421 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 94 [2018-01-24 11:55:16,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:16,422 INFO L225 Difference]: With dead ends: 172 [2018-01-24 11:55:16,422 INFO L226 Difference]: Without dead ends: 100 [2018-01-24 11:55:16,423 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=568, Invalid=914, Unknown=0, NotChecked=0, Total=1482 [2018-01-24 11:55:16,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-01-24 11:55:16,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-01-24 11:55:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-01-24 11:55:16,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2018-01-24 11:55:16,431 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 94 [2018-01-24 11:55:16,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:16,431 INFO L432 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2018-01-24 11:55:16,431 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-01-24 11:55:16,431 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2018-01-24 11:55:16,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-01-24 11:55:16,432 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:16,432 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, 1] [2018-01-24 11:55:16,432 INFO L371 AbstractCegarLoop]: === Iteration 27 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:16,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2100963315, now seen corresponding path program 13 times [2018-01-24 11:55:16,432 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:16,433 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:16,433 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:16,433 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:16,433 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:16,453 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:16,751 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:16,751 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 [2018-01-24 11:55:16,756 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:55:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:16,789 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:16,981 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:16,981 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2018-01-24 11:55:16,982 INFO L409 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-01-24 11:55:16,982 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-01-24 11:55:16,982 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=954, Unknown=0, NotChecked=0, Total=1560 [2018-01-24 11:55:16,982 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 40 states. [2018-01-24 11:55:17,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:17,324 INFO L93 Difference]: Finished difference Result 173 states and 181 transitions. [2018-01-24 11:55:17,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-24 11:55:17,324 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 95 [2018-01-24 11:55:17,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:17,325 INFO L225 Difference]: With dead ends: 173 [2018-01-24 11:55:17,325 INFO L226 Difference]: Without dead ends: 101 [2018-01-24 11:55:17,326 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=628, Invalid=1012, Unknown=0, NotChecked=0, Total=1640 [2018-01-24 11:55:17,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-01-24 11:55:17,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-01-24 11:55:17,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-01-24 11:55:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2018-01-24 11:55:17,330 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 95 [2018-01-24 11:55:17,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:17,331 INFO L432 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2018-01-24 11:55:17,331 INFO L433 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-01-24 11:55:17,331 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2018-01-24 11:55:17,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-01-24 11:55:17,331 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:17,331 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, 1] [2018-01-24 11:55:17,331 INFO L371 AbstractCegarLoop]: === Iteration 28 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:17,332 INFO L82 PathProgramCache]: Analyzing trace with hash -2056911296, now seen corresponding path program 14 times [2018-01-24 11:55:17,332 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:17,332 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:17,332 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:17,332 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:55:17,333 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:17,345 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:17,938 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:17,938 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 [2018-01-24 11:55:17,944 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 11:55:17,963 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:17,989 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:17,994 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:17,998 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:18,288 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:18,288 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2018-01-24 11:55:18,288 INFO L409 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-01-24 11:55:18,288 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-01-24 11:55:18,289 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=1054, Unknown=0, NotChecked=0, Total=1722 [2018-01-24 11:55:18,289 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 42 states. [2018-01-24 11:55:18,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:18,367 INFO L93 Difference]: Finished difference Result 174 states and 182 transitions. [2018-01-24 11:55:18,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-24 11:55:18,367 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 96 [2018-01-24 11:55:18,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:18,368 INFO L225 Difference]: With dead ends: 174 [2018-01-24 11:55:18,368 INFO L226 Difference]: Without dead ends: 102 [2018-01-24 11:55:18,369 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=691, Invalid=1115, Unknown=0, NotChecked=0, Total=1806 [2018-01-24 11:55:18,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-01-24 11:55:18,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-01-24 11:55:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-01-24 11:55:18,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2018-01-24 11:55:18,377 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 96 [2018-01-24 11:55:18,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:18,377 INFO L432 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2018-01-24 11:55:18,377 INFO L433 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-01-24 11:55:18,378 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2018-01-24 11:55:18,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-01-24 11:55:18,378 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:18,379 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, 1] [2018-01-24 11:55:18,379 INFO L371 AbstractCegarLoop]: === Iteration 29 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:18,379 INFO L82 PathProgramCache]: Analyzing trace with hash -2102005357, now seen corresponding path program 15 times [2018-01-24 11:55:18,379 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:18,379 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:18,379 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:18,380 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:18,380 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:18,399 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:18,983 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:18,983 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 [2018-01-24 11:55:18,988 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-24 11:55:19,008 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:19,021 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:19,038 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:19,057 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:19,080 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:19,103 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:19,146 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:19,337 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:19,663 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:19,769 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:20,716 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:20,718 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:20,723 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:20,918 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:20,918 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2018-01-24 11:55:20,919 INFO L409 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-01-24 11:55:20,919 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-01-24 11:55:20,919 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=1159, Unknown=0, NotChecked=0, Total=1892 [2018-01-24 11:55:20,920 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 44 states. [2018-01-24 11:55:20,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:20,975 INFO L93 Difference]: Finished difference Result 175 states and 183 transitions. [2018-01-24 11:55:20,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-24 11:55:20,975 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 97 [2018-01-24 11:55:20,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:20,976 INFO L225 Difference]: With dead ends: 175 [2018-01-24 11:55:20,976 INFO L226 Difference]: Without dead ends: 103 [2018-01-24 11:55:20,976 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=757, Invalid=1223, Unknown=0, NotChecked=0, Total=1980 [2018-01-24 11:55:20,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-01-24 11:55:20,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-01-24 11:55:20,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-01-24 11:55:20,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2018-01-24 11:55:20,984 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 97 [2018-01-24 11:55:20,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:20,985 INFO L432 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2018-01-24 11:55:20,985 INFO L433 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-01-24 11:55:20,985 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2018-01-24 11:55:20,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-01-24 11:55:20,985 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:20,986 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, 1] [2018-01-24 11:55:20,986 INFO L371 AbstractCegarLoop]: === Iteration 30 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:20,986 INFO L82 PathProgramCache]: Analyzing trace with hash 795046048, now seen corresponding path program 16 times [2018-01-24 11:55:20,986 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:20,986 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:20,987 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:20,987 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:20,987 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:21,005 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:21,810 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:21,810 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 [2018-01-24 11:55:21,815 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-24 11:55:21,949 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:21,954 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:22,186 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:22,186 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2018-01-24 11:55:22,187 INFO L409 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-01-24 11:55:22,187 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-01-24 11:55:22,188 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=801, Invalid=1269, Unknown=0, NotChecked=0, Total=2070 [2018-01-24 11:55:22,188 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 46 states. [2018-01-24 11:55:22,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:22,274 INFO L93 Difference]: Finished difference Result 176 states and 184 transitions. [2018-01-24 11:55:22,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-24 11:55:22,275 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 98 [2018-01-24 11:55:22,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:22,275 INFO L225 Difference]: With dead ends: 176 [2018-01-24 11:55:22,275 INFO L226 Difference]: Without dead ends: 104 [2018-01-24 11:55:22,276 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=826, Invalid=1336, Unknown=0, NotChecked=0, Total=2162 [2018-01-24 11:55:22,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-01-24 11:55:22,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-01-24 11:55:22,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-01-24 11:55:22,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2018-01-24 11:55:22,281 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 98 [2018-01-24 11:55:22,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:22,282 INFO L432 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2018-01-24 11:55:22,282 INFO L433 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-01-24 11:55:22,282 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2018-01-24 11:55:22,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-01-24 11:55:22,283 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:22,283 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, 1] [2018-01-24 11:55:22,283 INFO L371 AbstractCegarLoop]: === Iteration 31 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:22,283 INFO L82 PathProgramCache]: Analyzing trace with hash 409326387, now seen corresponding path program 17 times [2018-01-24 11:55:22,283 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:22,283 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:22,284 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:22,284 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:22,284 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:22,304 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:22,940 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:22,940 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 [2018-01-24 11:55:22,945 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-24 11:55:22,953 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:22,954 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:22,956 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:22,958 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:22,962 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:22,967 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:22,976 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:22,986 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:23,000 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:23,019 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:23,060 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:23,130 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:23,133 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:23,137 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:23,362 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:23,363 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2018-01-24 11:55:23,363 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-01-24 11:55:23,363 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-01-24 11:55:23,364 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=872, Invalid=1384, Unknown=0, NotChecked=0, Total=2256 [2018-01-24 11:55:23,364 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 48 states. [2018-01-24 11:55:23,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:23,482 INFO L93 Difference]: Finished difference Result 177 states and 185 transitions. [2018-01-24 11:55:23,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-24 11:55:23,483 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 99 [2018-01-24 11:55:23,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:23,484 INFO L225 Difference]: With dead ends: 177 [2018-01-24 11:55:23,484 INFO L226 Difference]: Without dead ends: 105 [2018-01-24 11:55:23,485 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=898, Invalid=1454, Unknown=0, NotChecked=0, Total=2352 [2018-01-24 11:55:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-01-24 11:55:23,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-01-24 11:55:23,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-01-24 11:55:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2018-01-24 11:55:23,491 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 99 [2018-01-24 11:55:23,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:23,491 INFO L432 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2018-01-24 11:55:23,491 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-01-24 11:55:23,491 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2018-01-24 11:55:23,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-01-24 11:55:23,491 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:23,492 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, 1] [2018-01-24 11:55:23,492 INFO L371 AbstractCegarLoop]: === Iteration 32 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:23,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1336918784, now seen corresponding path program 18 times [2018-01-24 11:55:23,492 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:23,492 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:23,493 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:23,493 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:23,493 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:23,512 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:24,077 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:24,077 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 [2018-01-24 11:55:24,084 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-24 11:55:24,106 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:24,119 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:24,143 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:24,163 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:24,186 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:24,277 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:24,598 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:24,754 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:25,097 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:25,457 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:25,723 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:26,022 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:26,025 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:26,031 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:26,408 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:26,408 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2018-01-24 11:55:26,409 INFO L409 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-01-24 11:55:26,409 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-01-24 11:55:26,410 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=925, Invalid=1525, Unknown=0, NotChecked=0, Total=2450 [2018-01-24 11:55:26,410 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 50 states. [2018-01-24 11:55:26,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:26,496 INFO L93 Difference]: Finished difference Result 178 states and 186 transitions. [2018-01-24 11:55:26,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-24 11:55:26,496 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 100 [2018-01-24 11:55:26,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:26,497 INFO L225 Difference]: With dead ends: 178 [2018-01-24 11:55:26,497 INFO L226 Difference]: Without dead ends: 106 [2018-01-24 11:55:26,498 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1001, Invalid=1651, Unknown=0, NotChecked=0, Total=2652 [2018-01-24 11:55:26,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-01-24 11:55:26,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-01-24 11:55:26,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-01-24 11:55:26,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2018-01-24 11:55:26,507 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 100 [2018-01-24 11:55:26,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:26,507 INFO L432 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2018-01-24 11:55:26,507 INFO L433 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-01-24 11:55:26,507 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2018-01-24 11:55:26,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-01-24 11:55:26,508 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:26,509 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, 1] [2018-01-24 11:55:26,509 INFO L371 AbstractCegarLoop]: === Iteration 33 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:26,509 INFO L82 PathProgramCache]: Analyzing trace with hash 27512019, now seen corresponding path program 19 times [2018-01-24 11:55:26,509 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:26,509 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:26,510 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:26,511 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:26,511 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:26,547 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:27,301 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:27,301 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 [2018-01-24 11:55:27,306 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:55:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:27,342 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:27,726 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:27,726 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2018-01-24 11:55:27,726 INFO L409 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-01-24 11:55:27,726 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-01-24 11:55:27,727 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1001, Invalid=1651, Unknown=0, NotChecked=0, Total=2652 [2018-01-24 11:55:27,728 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 52 states. [2018-01-24 11:55:27,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:27,838 INFO L93 Difference]: Finished difference Result 179 states and 187 transitions. [2018-01-24 11:55:27,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-24 11:55:27,838 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 101 [2018-01-24 11:55:27,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:27,839 INFO L225 Difference]: With dead ends: 179 [2018-01-24 11:55:27,839 INFO L226 Difference]: Without dead ends: 107 [2018-01-24 11:55:27,840 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1080, Invalid=1782, Unknown=0, NotChecked=0, Total=2862 [2018-01-24 11:55:27,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-01-24 11:55:27,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-01-24 11:55:27,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-01-24 11:55:27,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2018-01-24 11:55:27,846 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 101 [2018-01-24 11:55:27,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:27,847 INFO L432 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2018-01-24 11:55:27,847 INFO L433 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-01-24 11:55:27,847 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2018-01-24 11:55:27,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-01-24 11:55:27,847 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:27,847 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, 1] [2018-01-24 11:55:27,847 INFO L371 AbstractCegarLoop]: === Iteration 34 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:27,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1909392032, now seen corresponding path program 20 times [2018-01-24 11:55:27,848 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:27,848 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:27,848 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:27,849 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:55:27,849 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:27,863 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:28,400 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:28,400 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 [2018-01-24 11:55:28,405 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 11:55:28,431 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:28,458 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:28,461 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:28,466 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:28,763 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:28,763 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2018-01-24 11:55:28,764 INFO L409 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-01-24 11:55:28,764 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-01-24 11:55:28,765 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1080, Invalid=1782, Unknown=0, NotChecked=0, Total=2862 [2018-01-24 11:55:28,765 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 54 states. [2018-01-24 11:55:28,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:28,860 INFO L93 Difference]: Finished difference Result 180 states and 188 transitions. [2018-01-24 11:55:28,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-24 11:55:28,860 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 102 [2018-01-24 11:55:28,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:28,861 INFO L225 Difference]: With dead ends: 180 [2018-01-24 11:55:28,861 INFO L226 Difference]: Without dead ends: 108 [2018-01-24 11:55:28,862 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1345 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1162, Invalid=1918, Unknown=0, NotChecked=0, Total=3080 [2018-01-24 11:55:28,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-01-24 11:55:28,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-01-24 11:55:28,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-01-24 11:55:28,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2018-01-24 11:55:28,867 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 102 [2018-01-24 11:55:28,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:28,867 INFO L432 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2018-01-24 11:55:28,867 INFO L433 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-01-24 11:55:28,867 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2018-01-24 11:55:28,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-01-24 11:55:28,868 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:28,868 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, 1] [2018-01-24 11:55:28,868 INFO L371 AbstractCegarLoop]: === Iteration 35 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:28,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1823875469, now seen corresponding path program 21 times [2018-01-24 11:55:28,868 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:28,868 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:28,869 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:28,869 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:28,869 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:28,884 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:29,626 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:29,626 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 [2018-01-24 11:55:29,630 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-24 11:55:29,647 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:29,658 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:29,672 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:29,710 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:29,728 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:29,769 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:29,891 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:30,157 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:30,794 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:31,061 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:31,413 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:32,615 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:34,150 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:35,420 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-24 11:55:35,424 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:35,434 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:35,779 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:35,779 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2018-01-24 11:55:35,779 INFO L409 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-01-24 11:55:35,779 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-01-24 11:55:35,780 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1162, Invalid=1918, Unknown=0, NotChecked=0, Total=3080 [2018-01-24 11:55:35,780 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 56 states. [2018-01-24 11:55:35,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:35,863 INFO L93 Difference]: Finished difference Result 181 states and 189 transitions. [2018-01-24 11:55:35,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-24 11:55:35,863 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 103 [2018-01-24 11:55:35,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:35,864 INFO L225 Difference]: With dead ends: 181 [2018-01-24 11:55:35,864 INFO L226 Difference]: Without dead ends: 109 [2018-01-24 11:55:35,864 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1247, Invalid=2059, Unknown=0, NotChecked=0, Total=3306 [2018-01-24 11:55:35,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-01-24 11:55:35,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-01-24 11:55:35,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-01-24 11:55:35,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2018-01-24 11:55:35,869 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 103 [2018-01-24 11:55:35,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:35,869 INFO L432 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2018-01-24 11:55:35,869 INFO L433 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-01-24 11:55:35,869 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2018-01-24 11:55:35,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-01-24 11:55:35,870 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:35,870 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, 1] [2018-01-24 11:55:35,870 INFO L371 AbstractCegarLoop]: === Iteration 36 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:35,870 INFO L82 PathProgramCache]: Analyzing trace with hash 827137984, now seen corresponding path program 22 times [2018-01-24 11:55:35,870 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:35,870 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:35,871 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:35,871 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:35,871 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:35,884 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:36,315 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:36,315 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 [2018-01-24 11:55:36,320 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-24 11:55:37,900 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:37,906 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:38,210 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:38,211 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2018-01-24 11:55:38,211 INFO L409 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-01-24 11:55:38,211 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-01-24 11:55:38,212 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1247, Invalid=2059, Unknown=0, NotChecked=0, Total=3306 [2018-01-24 11:55:38,212 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 58 states. [2018-01-24 11:55:38,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:38,300 INFO L93 Difference]: Finished difference Result 182 states and 190 transitions. [2018-01-24 11:55:38,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-24 11:55:38,300 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 104 [2018-01-24 11:55:38,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:38,301 INFO L225 Difference]: With dead ends: 182 [2018-01-24 11:55:38,301 INFO L226 Difference]: Without dead ends: 110 [2018-01-24 11:55:38,302 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1335, Invalid=2205, Unknown=0, NotChecked=0, Total=3540 [2018-01-24 11:55:38,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-01-24 11:55:38,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-01-24 11:55:38,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-01-24 11:55:38,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2018-01-24 11:55:38,307 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 104 [2018-01-24 11:55:38,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:38,307 INFO L432 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2018-01-24 11:55:38,307 INFO L433 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-01-24 11:55:38,307 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2018-01-24 11:55:38,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-01-24 11:55:38,307 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:38,307 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, 1] [2018-01-24 11:55:38,308 INFO L371 AbstractCegarLoop]: === Iteration 37 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:38,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1404176403, now seen corresponding path program 23 times [2018-01-24 11:55:38,308 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:38,308 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:38,309 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:38,309 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:38,309 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:38,323 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:39,075 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:39,075 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 [2018-01-24 11:55:39,080 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-24 11:55:39,090 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:39,091 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:39,095 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:39,099 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:39,102 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:39,107 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:39,116 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:39,129 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:39,140 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:39,174 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:39,206 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:39,230 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:39,278 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:39,358 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:39,504 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 11:55:39,508 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 11:55:39,513 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 11:55:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:39,915 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-24 11:55:39,915 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2018-01-24 11:55:39,915 INFO L409 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-01-24 11:55:39,916 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-01-24 11:55:39,916 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2205, Unknown=0, NotChecked=0, Total=3540 [2018-01-24 11:55:39,917 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 60 states. [2018-01-24 11:55:40,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:55:40,204 INFO L93 Difference]: Finished difference Result 183 states and 191 transitions. [2018-01-24 11:55:40,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-24 11:55:40,204 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 105 [2018-01-24 11:55:40,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:55:40,205 INFO L225 Difference]: With dead ends: 183 [2018-01-24 11:55:40,205 INFO L226 Difference]: Without dead ends: 111 [2018-01-24 11:55:40,206 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1675 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1426, Invalid=2356, Unknown=0, NotChecked=0, Total=3782 [2018-01-24 11:55:40,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-01-24 11:55:40,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-01-24 11:55:40,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-01-24 11:55:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2018-01-24 11:55:40,213 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 105 [2018-01-24 11:55:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:55:40,213 INFO L432 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2018-01-24 11:55:40,213 INFO L433 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-01-24 11:55:40,213 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2018-01-24 11:55:40,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-01-24 11:55:40,214 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:55:40,214 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, 1] [2018-01-24 11:55:40,214 INFO L371 AbstractCegarLoop]: === Iteration 38 === [Sum2Err2RequiresViolation, Sum2Err0RequiresViolation, Sum2Err1RequiresViolation, Sum2Err3RequiresViolation, SumErr2RequiresViolation, SumErr3RequiresViolation, SumErr1RequiresViolation, SumErr0RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 11:55:40,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2112498208, now seen corresponding path program 24 times [2018-01-24 11:55:40,215 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:55:40,215 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:55:40,215 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:40,215 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-24 11:55:40,215 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:55:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:55:40,233 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:55:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-01-24 11:55:40,924 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 11:55:40,924 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 11:55:40,930 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-24 11:55:40,952 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:40,965 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:40,983 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:41,012 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:41,063 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:41,196 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:41,295 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:41,743 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command Received shutdown request... [2018-01-24 11:55:42,897 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:43,182 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:44,342 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:45,186 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-24 11:55:47,415 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command Cannot interrupt operation gracefully because timeout expired. Forcing shutdown