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_SS.epf -i ../../../trunk/examples/svcomp/memsafety/960521-1_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-5f7ec6e [2018-01-31 09:09:49,350 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-31 09:09:49,377 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-31 09:09:49,396 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-31 09:09:49,396 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-31 09:09:49,397 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-31 09:09:49,398 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-31 09:09:49,400 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-31 09:09:49,402 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-31 09:09:49,403 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-31 09:09:49,404 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-31 09:09:49,406 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-31 09:09:49,407 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-31 09:09:49,408 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-31 09:09:49,409 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-31 09:09:49,417 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-31 09:09:49,419 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-31 09:09:49,424 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-31 09:09:49,425 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-31 09:09:49,426 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-31 09:09:49,428 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-31 09:09:49,428 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-31 09:09:49,429 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-31 09:09:49,429 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-31 09:09:49,430 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-31 09:09:49,431 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-31 09:09:49,432 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-31 09:09:49,432 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-31 09:09:49,432 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-31 09:09:49,433 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-31 09:09:49,433 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-31 09:09:49,434 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_SS.epf [2018-01-31 09:09:49,443 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-31 09:09:49,443 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-31 09:09:49,444 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-31 09:09:49,449 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-31 09:09:49,449 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-31 09:09:49,450 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-31 09:09:49,450 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-31 09:09:49,450 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-31 09:09:49,451 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-31 09:09:49,451 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-31 09:09:49,451 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-31 09:09:49,451 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-31 09:09:49,451 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-31 09:09:49,451 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-31 09:09:49,452 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-31 09:09:49,452 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-31 09:09:49,452 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-31 09:09:49,452 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-31 09:09:49,452 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-31 09:09:49,453 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-01-31 09:09:49,453 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-31 09:09:49,453 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-31 09:09:49,453 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-31 09:09:49,453 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-31 09:09:49,453 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-31 09:09:49,454 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-31 09:09:49,454 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-31 09:09:49,454 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-31 09:09:49,454 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-31 09:09:49,454 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-31 09:09:49,454 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-31 09:09:49,455 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-31 09:09:49,455 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-31 09:09:49,456 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-31 09:09:49,509 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-31 09:09:49,523 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-31 09:09:49,527 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-31 09:09:49,529 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-31 09:09:49,529 INFO L276 PluginConnector]: CDTParser initialized [2018-01-31 09:09:49,530 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/960521-1_true-valid-memsafety.i [2018-01-31 09:09:49,710 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-31 09:09:49,718 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-31 09:09:49,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-31 09:09:49,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-31 09:09:49,727 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-31 09:09:49,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:09:49" (1/1) ... [2018-01-31 09:09:49,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21155711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:49, skipping insertion in model container [2018-01-31 09:09:49,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:09:49" (1/1) ... [2018-01-31 09:09:49,751 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-31 09:09:49,815 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-31 09:09:49,983 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-31 09:09:50,002 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-31 09:09:50,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:50 WrapperNode [2018-01-31 09:09:50,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-31 09:09:50,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-31 09:09:50,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-31 09:09:50,020 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-31 09:09:50,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:50" (1/1) ... [2018-01-31 09:09:50,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:50" (1/1) ... [2018-01-31 09:09:50,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:50" (1/1) ... [2018-01-31 09:09:50,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:50" (1/1) ... [2018-01-31 09:09:50,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:50" (1/1) ... [2018-01-31 09:09:50,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:50" (1/1) ... [2018-01-31 09:09:50,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:50" (1/1) ... [2018-01-31 09:09:50,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-31 09:09:50,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-31 09:09:50,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-31 09:09:50,056 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-31 09:09:50,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:50" (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 [2018-01-31 09:09:50,114 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-31 09:09:50,114 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-31 09:09:50,114 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-31 09:09:50,114 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-31 09:09:50,115 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-31 09:09:50,115 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-31 09:09:50,115 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-31 09:09:50,115 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-31 09:09:50,115 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-31 09:09:50,115 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-31 09:09:50,115 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-31 09:09:50,116 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-31 09:09:50,116 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-31 09:09:50,116 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-31 09:09:50,118 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-31 09:09:50,624 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-31 09:09:50,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:09:50 BoogieIcfgContainer [2018-01-31 09:09:50,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-31 09:09:50,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-31 09:09:50,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-31 09:09:50,629 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-31 09:09:50,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:09:49" (1/3) ... [2018-01-31 09:09:50,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694c21bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:09:50, skipping insertion in model container [2018-01-31 09:09:50,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:09:50" (2/3) ... [2018-01-31 09:09:50,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694c21bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:09:50, skipping insertion in model container [2018-01-31 09:09:50,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:09:50" (3/3) ... [2018-01-31 09:09:50,633 INFO L107 eAbstractionObserver]: Analyzing ICFG 960521-1_true-valid-memsafety.i [2018-01-31 09:09:50,642 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-31 09:09:50,652 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 17 error locations. [2018-01-31 09:09:50,696 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-31 09:09:50,696 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-31 09:09:50,696 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-31 09:09:50,696 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-31 09:09:50,696 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-31 09:09:50,696 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-31 09:09:50,696 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-31 09:09:50,696 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-31 09:09:50,697 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-31 09:09:50,717 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2018-01-31 09:09:50,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-31 09:09:50,727 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:09:50,728 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-31 09:09:50,728 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:09:50,734 INFO L82 PathProgramCache]: Analyzing trace with hash 608637057, now seen corresponding path program 1 times [2018-01-31 09:09:50,736 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:09:50,736 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:09:50,791 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:50,792 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:09:50,792 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:09:50,880 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:09:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-31 09:09:51,169 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-31 09:09:51,169 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-31 09:09:51,171 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-31 09:09:51,185 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-31 09:09:51,185 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-31 09:09:51,188 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 5 states. [2018-01-31 09:09:51,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:09:51,807 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2018-01-31 09:09:51,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-31 09:09:51,809 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-01-31 09:09:51,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:09:51,819 INFO L225 Difference]: With dead ends: 99 [2018-01-31 09:09:51,819 INFO L226 Difference]: Without dead ends: 60 [2018-01-31 09:09:51,823 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-31 09:09:51,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-31 09:09:51,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-01-31 09:09:51,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-31 09:09:51,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-01-31 09:09:51,854 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 17 [2018-01-31 09:09:51,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:09:51,854 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-01-31 09:09:51,854 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-31 09:09:51,855 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-01-31 09:09:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-31 09:09:51,855 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:09:51,855 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-31 09:09:51,856 INFO L371 AbstractCegarLoop]: === Iteration 2 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:09:51,856 INFO L82 PathProgramCache]: Analyzing trace with hash 608637058, now seen corresponding path program 1 times [2018-01-31 09:09:51,856 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:09:51,856 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:09:51,857 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:51,857 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:09:51,857 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:09:51,881 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:09:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-31 09:09:52,024 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-31 09:09:52,024 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-31 09:09:52,025 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-31 09:09:52,026 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-31 09:09:52,026 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-31 09:09:52,026 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 6 states. [2018-01-31 09:09:52,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:09:52,380 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-01-31 09:09:52,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-31 09:09:52,380 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-01-31 09:09:52,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:09:52,382 INFO L225 Difference]: With dead ends: 60 [2018-01-31 09:09:52,382 INFO L226 Difference]: Without dead ends: 59 [2018-01-31 09:09:52,383 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-31 09:09:52,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-31 09:09:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-01-31 09:09:52,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-01-31 09:09:52,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-01-31 09:09:52,390 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 17 [2018-01-31 09:09:52,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:09:52,391 INFO L432 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-01-31 09:09:52,391 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-31 09:09:52,391 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-01-31 09:09:52,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-31 09:09:52,393 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:09:52,393 INFO L351 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] [2018-01-31 09:09:52,394 INFO L371 AbstractCegarLoop]: === Iteration 3 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:09:52,394 INFO L82 PathProgramCache]: Analyzing trace with hash 186914476, now seen corresponding path program 1 times [2018-01-31 09:09:52,394 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:09:52,394 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:09:52,395 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:52,395 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:09:52,396 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:09:52,417 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:09:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-31 09:09:52,496 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-31 09:09:52,496 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-31 09:09:52,497 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-31 09:09:52,497 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-31 09:09:52,497 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-31 09:09:52,497 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 4 states. [2018-01-31 09:09:52,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:09:52,922 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-01-31 09:09:52,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-31 09:09:52,922 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2018-01-31 09:09:52,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:09:52,923 INFO L225 Difference]: With dead ends: 59 [2018-01-31 09:09:52,924 INFO L226 Difference]: Without dead ends: 56 [2018-01-31 09:09:52,924 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-31 09:09:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-31 09:09:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-01-31 09:09:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-31 09:09:52,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-01-31 09:09:52,931 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 24 [2018-01-31 09:09:52,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:09:52,931 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-01-31 09:09:52,931 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-31 09:09:52,931 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-01-31 09:09:52,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-31 09:09:52,932 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:09:52,932 INFO L351 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] [2018-01-31 09:09:52,933 INFO L371 AbstractCegarLoop]: === Iteration 4 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:09:52,933 INFO L82 PathProgramCache]: Analyzing trace with hash 186914477, now seen corresponding path program 1 times [2018-01-31 09:09:52,933 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:09:52,933 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:09:52,934 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:52,934 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:09:52,934 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:09:52,953 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:09:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-31 09:09:53,243 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-31 09:09:53,243 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-31 09:09:53,243 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-31 09:09:53,244 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-31 09:09:53,244 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-01-31 09:09:53,244 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 7 states. [2018-01-31 09:09:53,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:09:53,399 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2018-01-31 09:09:53,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-31 09:09:53,400 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2018-01-31 09:09:53,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:09:53,402 INFO L225 Difference]: With dead ends: 94 [2018-01-31 09:09:53,402 INFO L226 Difference]: Without dead ends: 65 [2018-01-31 09:09:53,402 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-01-31 09:09:53,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-01-31 09:09:53,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2018-01-31 09:09:53,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-01-31 09:09:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-01-31 09:09:53,410 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 24 [2018-01-31 09:09:53,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:09:53,410 INFO L432 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-01-31 09:09:53,410 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-31 09:09:53,411 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-01-31 09:09:53,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-31 09:09:53,412 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:09:53,412 INFO L351 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] [2018-01-31 09:09:53,412 INFO L371 AbstractCegarLoop]: === Iteration 5 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:09:53,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1679529059, now seen corresponding path program 1 times [2018-01-31 09:09:53,412 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:09:53,412 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:09:53,413 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:53,413 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:09:53,413 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:09:53,431 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:09:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-31 09:09:53,931 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:09:53,931 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 [2018-01-31 09:09:53,948 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:09:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:09:53,997 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:09:54,054 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 [2018-01-31 09:09:54,056 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-31 09:09:54,108 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-31 09:09:54,108 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2018-01-31 09:09:54,162 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 16 treesize of output 15 [2018-01-31 09:09:54,162 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-31 09:09:54,170 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-01-31 09:09:54,170 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:21 [2018-01-31 09:09:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-31 09:09:54,476 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:09:54,485 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-01-31 09:09:54,486 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-31 09:09:54,486 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-31 09:09:54,486 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-01-31 09:09:54,486 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 13 states. [2018-01-31 09:09:54,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:09:54,937 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2018-01-31 09:09:54,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-31 09:09:54,941 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2018-01-31 09:09:54,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:09:54,942 INFO L225 Difference]: With dead ends: 100 [2018-01-31 09:09:54,942 INFO L226 Difference]: Without dead ends: 71 [2018-01-31 09:09:54,943 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-01-31 09:09:54,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-01-31 09:09:54,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2018-01-31 09:09:54,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-01-31 09:09:54,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-01-31 09:09:54,952 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 30 [2018-01-31 09:09:54,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:09:54,952 INFO L432 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-01-31 09:09:54,953 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-31 09:09:54,953 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-01-31 09:09:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-31 09:09:54,954 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:09:54,954 INFO L351 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-31 09:09:54,954 INFO L371 AbstractCegarLoop]: === Iteration 6 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:09:54,954 INFO L82 PathProgramCache]: Analyzing trace with hash -294686311, now seen corresponding path program 2 times [2018-01-31 09:09:54,954 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:09:54,955 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:09:54,956 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:54,956 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:09:54,956 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:09:54,975 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:09:55,759 WARN L146 SmtUtils]: Spent 116ms on a formula simplification. DAG size of input: 17 DAG size of output 15 [2018-01-31 09:09:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-31 09:09:55,905 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:09:55,905 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) [2018-01-31 09:09:55,918 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-31 09:09:55,942 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:09:55,948 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:09:55,949 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:09:55,953 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:09:55,962 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 [2018-01-31 09:09:55,963 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-31 09:09:55,968 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 6 treesize of output 5 [2018-01-31 09:09:55,969 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-31 09:09:55,973 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-31 09:09:55,973 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:18, output treesize:16 [2018-01-31 09:09:56,007 INFO L700 Elim1Store]: detected not equals via solver [2018-01-31 09:09:56,007 INFO L700 Elim1Store]: detected not equals via solver [2018-01-31 09:09:56,009 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-01-31 09:09:56,010 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-31 09:09:56,020 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 19 [2018-01-31 09:09:56,021 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-31 09:09:56,027 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-01-31 09:09:56,027 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:22 [2018-01-31 09:09:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-31 09:09:56,316 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:09:56,316 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-01-31 09:09:56,316 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-31 09:09:56,316 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-31 09:09:56,317 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2018-01-31 09:09:56,318 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 20 states. [2018-01-31 09:09:57,430 WARN L146 SmtUtils]: Spent 203ms on a formula simplification. DAG size of input: 37 DAG size of output 34 [2018-01-31 09:09:58,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:09:58,077 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2018-01-31 09:09:58,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-31 09:09:58,077 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2018-01-31 09:09:58,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:09:58,078 INFO L225 Difference]: With dead ends: 105 [2018-01-31 09:09:58,078 INFO L226 Difference]: Without dead ends: 76 [2018-01-31 09:09:58,079 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2018-01-31 09:09:58,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-01-31 09:09:58,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2018-01-31 09:09:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-01-31 09:09:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2018-01-31 09:09:58,089 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 36 [2018-01-31 09:09:58,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:09:58,089 INFO L432 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2018-01-31 09:09:58,089 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-31 09:09:58,089 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2018-01-31 09:09:58,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-01-31 09:09:58,090 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:09:58,091 INFO L351 BasicCegarLoop]: trace histogram [4, 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] [2018-01-31 09:09:58,091 INFO L371 AbstractCegarLoop]: === Iteration 7 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:09:58,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1273956393, now seen corresponding path program 1 times [2018-01-31 09:09:58,091 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:09:58,091 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:09:58,092 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:58,092 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:09:58,092 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:09:58,108 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:09:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-31 09:09:58,362 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:09:58,363 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 [2018-01-31 09:09:58,369 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:09:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:09:58,406 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:09:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-31 09:09:58,573 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:09:58,574 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-01-31 09:09:58,574 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-31 09:09:58,574 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-31 09:09:58,574 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2018-01-31 09:09:58,575 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 17 states. [2018-01-31 09:09:58,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:09:58,721 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2018-01-31 09:09:58,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-31 09:09:58,722 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2018-01-31 09:09:58,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:09:58,722 INFO L225 Difference]: With dead ends: 110 [2018-01-31 09:09:58,723 INFO L226 Difference]: Without dead ends: 82 [2018-01-31 09:09:58,723 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2018-01-31 09:09:58,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-01-31 09:09:58,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2018-01-31 09:09:58,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-01-31 09:09:58,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2018-01-31 09:09:58,735 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 45 [2018-01-31 09:09:58,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:09:58,735 INFO L432 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2018-01-31 09:09:58,736 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-31 09:09:58,736 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2018-01-31 09:09:58,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-01-31 09:09:58,737 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:09:58,737 INFO L351 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-31 09:09:58,737 INFO L371 AbstractCegarLoop]: === Iteration 8 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:09:58,737 INFO L82 PathProgramCache]: Analyzing trace with hash -225814477, now seen corresponding path program 2 times [2018-01-31 09:09:58,738 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:09:58,738 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:09:58,738 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:58,739 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:09:58,739 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:09:58,757 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:09:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-31 09:09:58,958 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:09:58,958 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 [2018-01-31 09:09:58,963 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-31 09:09:58,980 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:09:58,994 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:09:58,998 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:09:59,007 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 [2018-01-31 09:09:59,008 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-31 09:09:59,093 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-01-31 09:09:59,094 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:14 [2018-01-31 09:09:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-01-31 09:09:59,418 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-31 09:09:59,419 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2018-01-31 09:09:59,419 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-31 09:09:59,420 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-31 09:09:59,420 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2018-01-31 09:09:59,420 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 19 states. [2018-01-31 09:10:00,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:10:00,275 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2018-01-31 09:10:00,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-31 09:10:00,276 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2018-01-31 09:10:00,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:10:00,278 INFO L225 Difference]: With dead ends: 113 [2018-01-31 09:10:00,278 INFO L226 Difference]: Without dead ends: 85 [2018-01-31 09:10:00,279 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=310, Invalid=1250, Unknown=0, NotChecked=0, Total=1560 [2018-01-31 09:10:00,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-01-31 09:10:00,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2018-01-31 09:10:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-01-31 09:10:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-01-31 09:10:00,295 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 51 [2018-01-31 09:10:00,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:10:00,296 INFO L432 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-01-31 09:10:00,296 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-31 09:10:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-01-31 09:10:00,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-01-31 09:10:00,297 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:10:00,298 INFO L351 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 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] [2018-01-31 09:10:00,298 INFO L371 AbstractCegarLoop]: === Iteration 9 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:10:00,298 INFO L82 PathProgramCache]: Analyzing trace with hash -921316877, now seen corresponding path program 1 times [2018-01-31 09:10:00,298 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:10:00,298 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:10:00,299 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:00,299 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:10:00,299 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:10:00,316 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:10:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-31 09:10:00,511 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:10:00,511 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 [2018-01-31 09:10:00,518 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:10:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:10:00,575 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:10:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-31 09:10:00,796 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:10:00,796 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-01-31 09:10:00,797 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-01-31 09:10:00,797 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-01-31 09:10:00,797 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2018-01-31 09:10:00,797 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 25 states. [2018-01-31 09:10:01,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:10:01,332 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2018-01-31 09:10:01,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-31 09:10:01,333 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2018-01-31 09:10:01,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:10:01,334 INFO L225 Difference]: With dead ends: 118 [2018-01-31 09:10:01,334 INFO L226 Difference]: Without dead ends: 91 [2018-01-31 09:10:01,335 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2018-01-31 09:10:01,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-01-31 09:10:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2018-01-31 09:10:01,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-31 09:10:01,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-01-31 09:10:01,346 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 63 [2018-01-31 09:10:01,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:10:01,346 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-01-31 09:10:01,347 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-01-31 09:10:01,347 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-01-31 09:10:01,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-01-31 09:10:01,348 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:10:01,348 INFO L351 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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] [2018-01-31 09:10:01,348 INFO L371 AbstractCegarLoop]: === Iteration 10 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:10:01,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1713697661, now seen corresponding path program 2 times [2018-01-31 09:10:01,349 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:10:01,349 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:10:01,349 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:01,350 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:10:01,350 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:10:01,365 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:10:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-31 09:10:01,664 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:10:01,664 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 [2018-01-31 09:10:01,672 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-31 09:10:01,688 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:10:01,697 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:10:01,698 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:10:01,702 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:10:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-31 09:10:02,020 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:10:02,020 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2018-01-31 09:10:02,020 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-01-31 09:10:02,021 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-01-31 09:10:02,021 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2018-01-31 09:10:02,021 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 29 states. [2018-01-31 09:10:02,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:10:02,376 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2018-01-31 09:10:02,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-31 09:10:02,376 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 69 [2018-01-31 09:10:02,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:10:02,377 INFO L225 Difference]: With dead ends: 124 [2018-01-31 09:10:02,377 INFO L226 Difference]: Without dead ends: 97 [2018-01-31 09:10:02,378 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=484, Invalid=1156, Unknown=0, NotChecked=0, Total=1640 [2018-01-31 09:10:02,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-01-31 09:10:02,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2018-01-31 09:10:02,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-01-31 09:10:02,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2018-01-31 09:10:02,387 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 69 [2018-01-31 09:10:02,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:10:02,388 INFO L432 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2018-01-31 09:10:02,388 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-01-31 09:10:02,388 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2018-01-31 09:10:02,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-01-31 09:10:02,389 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:10:02,389 INFO L351 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 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] [2018-01-31 09:10:02,390 INFO L371 AbstractCegarLoop]: === Iteration 11 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:10:02,390 INFO L82 PathProgramCache]: Analyzing trace with hash -307018361, now seen corresponding path program 3 times [2018-01-31 09:10:02,390 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:10:02,390 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:10:02,391 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:02,391 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:10:02,391 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:10:02,406 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:10:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-31 09:10:02,662 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:10:02,662 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 [2018-01-31 09:10:02,670 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-31 09:10:02,685 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:10:02,689 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:10:02,690 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:10:02,693 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:10:02,701 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 [2018-01-31 09:10:02,702 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-31 09:10:02,706 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-01-31 09:10:02,706 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:14 [2018-01-31 09:10:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2018-01-31 09:10:02,972 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:10:02,972 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2018-01-31 09:10:02,973 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-01-31 09:10:02,973 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-01-31 09:10:02,973 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2018-01-31 09:10:02,973 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 25 states. [2018-01-31 09:10:04,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:10:04,020 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2018-01-31 09:10:04,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-01-31 09:10:04,020 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 75 [2018-01-31 09:10:04,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:10:04,021 INFO L225 Difference]: With dead ends: 136 [2018-01-31 09:10:04,021 INFO L226 Difference]: Without dead ends: 109 [2018-01-31 09:10:04,022 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=630, Invalid=2340, Unknown=0, NotChecked=0, Total=2970 [2018-01-31 09:10:04,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-01-31 09:10:04,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2018-01-31 09:10:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-01-31 09:10:04,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2018-01-31 09:10:04,030 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 75 [2018-01-31 09:10:04,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:10:04,030 INFO L432 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2018-01-31 09:10:04,030 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-01-31 09:10:04,030 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2018-01-31 09:10:04,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-01-31 09:10:04,032 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:10:04,032 INFO L351 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-31 09:10:04,032 INFO L371 AbstractCegarLoop]: === Iteration 12 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:10:04,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1495560775, now seen corresponding path program 4 times [2018-01-31 09:10:04,032 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:10:04,032 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:10:04,033 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:04,033 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:10:04,033 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:10:04,049 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:10:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-01-31 09:10:04,409 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:10:04,409 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 [2018-01-31 09:10:04,416 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-31 09:10:04,455 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:10:04,460 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:10:04,481 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 [2018-01-31 09:10:04,482 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-31 09:10:04,524 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-31 09:10:04,524 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2018-01-31 09:10:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 140 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-31 09:10:05,284 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:10:05,284 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 46 [2018-01-31 09:10:05,311 INFO L409 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-01-31 09:10:05,311 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-01-31 09:10:05,312 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1846, Unknown=0, NotChecked=0, Total=2070 [2018-01-31 09:10:05,312 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 46 states. [2018-01-31 09:10:06,447 WARN L146 SmtUtils]: Spent 126ms on a formula simplification. DAG size of input: 22 DAG size of output 16 [2018-01-31 09:10:07,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:10:07,868 INFO L93 Difference]: Finished difference Result 154 states and 158 transitions. [2018-01-31 09:10:07,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-01-31 09:10:07,869 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 87 [2018-01-31 09:10:07,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:10:07,870 INFO L225 Difference]: With dead ends: 154 [2018-01-31 09:10:07,870 INFO L226 Difference]: Without dead ends: 121 [2018-01-31 09:10:07,871 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1008, Invalid=6302, Unknown=0, NotChecked=0, Total=7310 [2018-01-31 09:10:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-01-31 09:10:07,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2018-01-31 09:10:07,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-01-31 09:10:07,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2018-01-31 09:10:07,882 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 87 [2018-01-31 09:10:07,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:10:07,883 INFO L432 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2018-01-31 09:10:07,885 INFO L433 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-01-31 09:10:07,885 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2018-01-31 09:10:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-01-31 09:10:07,886 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:10:07,887 INFO L351 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 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] [2018-01-31 09:10:07,887 INFO L371 AbstractCegarLoop]: === Iteration 13 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:10:07,887 INFO L82 PathProgramCache]: Analyzing trace with hash -552939513, now seen corresponding path program 5 times [2018-01-31 09:10:07,887 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:10:07,887 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:10:07,888 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:07,888 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:10:07,888 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:10:07,912 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:10:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-01-31 09:10:08,358 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:10:08,358 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 [2018-01-31 09:10:08,371 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-31 09:10:08,381 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:10:08,383 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:10:08,387 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:10:08,389 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:10:08,391 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:10:08,394 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:10:08,397 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:10:08,404 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:10:08,412 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:10:08,445 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:10:08,447 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:10:08,450 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:10:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-01-31 09:10:09,015 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:10:09,016 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2018-01-31 09:10:09,016 INFO L409 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-01-31 09:10:09,016 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-01-31 09:10:09,016 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1261, Unknown=0, NotChecked=0, Total=1640 [2018-01-31 09:10:09,017 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 41 states. [2018-01-31 09:10:09,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:10:09,442 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-01-31 09:10:09,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-31 09:10:09,442 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 99 [2018-01-31 09:10:09,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:10:09,443 INFO L225 Difference]: With dead ends: 164 [2018-01-31 09:10:09,443 INFO L226 Difference]: Without dead ends: 125 [2018-01-31 09:10:09,444 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=964, Invalid=2458, Unknown=0, NotChecked=0, Total=3422 [2018-01-31 09:10:09,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-01-31 09:10:09,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2018-01-31 09:10:09,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-01-31 09:10:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2018-01-31 09:10:09,450 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 99 [2018-01-31 09:10:09,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:10:09,450 INFO L432 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2018-01-31 09:10:09,450 INFO L433 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-01-31 09:10:09,450 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2018-01-31 09:10:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-01-31 09:10:09,451 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:10:09,451 INFO L351 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 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] [2018-01-31 09:10:09,451 INFO L371 AbstractCegarLoop]: === Iteration 14 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:10:09,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1688898415, now seen corresponding path program 6 times [2018-01-31 09:10:09,451 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:10:09,451 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:10:09,452 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:09,452 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:10:09,452 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:10:09,471 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:10:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-01-31 09:10:10,100 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:10:10,100 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 [2018-01-31 09:10:10,105 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-31 09:10:10,120 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:10:10,130 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:10:10,144 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:10:10,157 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:10:10,161 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:10:10,175 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 [2018-01-31 09:10:10,176 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-31 09:10:10,180 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-01-31 09:10:10,180 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:14 [2018-01-31 09:10:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2018-01-31 09:10:11,376 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-31 09:10:11,376 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [24] total 32 [2018-01-31 09:10:11,377 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-31 09:10:11,377 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-31 09:10:11,377 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2018-01-31 09:10:11,377 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 32 states. [2018-01-31 09:10:12,294 WARN L143 SmtUtils]: Spent 109ms on a formula simplification that was a NOOP. DAG size: 18 [2018-01-31 09:10:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:10:13,403 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2018-01-31 09:10:13,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-01-31 09:10:13,404 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 105 [2018-01-31 09:10:13,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:10:13,405 INFO L225 Difference]: With dead ends: 169 [2018-01-31 09:10:13,405 INFO L226 Difference]: Without dead ends: 130 [2018-01-31 09:10:13,406 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1127, Invalid=4423, Unknown=0, NotChecked=0, Total=5550 [2018-01-31 09:10:13,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-01-31 09:10:13,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2018-01-31 09:10:13,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-01-31 09:10:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2018-01-31 09:10:13,416 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 105 [2018-01-31 09:10:13,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:10:13,416 INFO L432 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2018-01-31 09:10:13,416 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-31 09:10:13,417 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2018-01-31 09:10:13,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-01-31 09:10:13,418 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:10:13,418 INFO L351 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 4, 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] [2018-01-31 09:10:13,418 INFO L371 AbstractCegarLoop]: === Iteration 15 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:10:13,418 INFO L82 PathProgramCache]: Analyzing trace with hash -329584181, now seen corresponding path program 1 times [2018-01-31 09:10:13,418 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:10:13,419 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:10:13,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:13,419 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:10:13,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:10:13,436 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:10:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2018-01-31 09:10:13,579 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:10:13,579 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 [2018-01-31 09:10:13,585 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:10:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:10:13,619 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:10:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-01-31 09:10:13,952 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:10:13,952 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 26] total 33 [2018-01-31 09:10:13,952 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-01-31 09:10:13,953 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-01-31 09:10:13,953 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=831, Unknown=0, NotChecked=0, Total=1056 [2018-01-31 09:10:13,953 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 33 states. [2018-01-31 09:10:14,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:10:14,484 INFO L93 Difference]: Finished difference Result 181 states and 184 transitions. [2018-01-31 09:10:14,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-01-31 09:10:14,484 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 117 [2018-01-31 09:10:14,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:10:14,485 INFO L225 Difference]: With dead ends: 181 [2018-01-31 09:10:14,486 INFO L226 Difference]: Without dead ends: 144 [2018-01-31 09:10:14,487 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=957, Invalid=2825, Unknown=0, NotChecked=0, Total=3782 [2018-01-31 09:10:14,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-01-31 09:10:14,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2018-01-31 09:10:14,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-01-31 09:10:14,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2018-01-31 09:10:14,498 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 117 [2018-01-31 09:10:14,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:10:14,498 INFO L432 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2018-01-31 09:10:14,498 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-01-31 09:10:14,499 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2018-01-31 09:10:14,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-01-31 09:10:14,500 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:10:14,500 INFO L351 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-31 09:10:14,500 INFO L371 AbstractCegarLoop]: === Iteration 16 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:10:14,500 INFO L82 PathProgramCache]: Analyzing trace with hash -576261493, now seen corresponding path program 2 times [2018-01-31 09:10:14,500 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:10:14,500 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:10:14,501 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:14,501 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:10:14,502 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:10:14,523 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:10:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-01-31 09:10:14,998 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:10:14,998 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 [2018-01-31 09:10:15,003 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-31 09:10:15,024 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:10:15,040 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:10:15,042 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:10:15,046 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:10:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-01-31 09:10:15,401 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:10:15,401 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 28] total 37 [2018-01-31 09:10:15,401 INFO L409 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-01-31 09:10:15,401 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-01-31 09:10:15,402 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2018-01-31 09:10:15,402 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 37 states. [2018-01-31 09:10:16,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:10:16,247 INFO L93 Difference]: Finished difference Result 199 states and 202 transitions. [2018-01-31 09:10:16,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-01-31 09:10:16,248 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 129 [2018-01-31 09:10:16,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:10:16,249 INFO L225 Difference]: With dead ends: 199 [2018-01-31 09:10:16,249 INFO L226 Difference]: Without dead ends: 156 [2018-01-31 09:10:16,250 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1174, Invalid=3656, Unknown=0, NotChecked=0, Total=4830 [2018-01-31 09:10:16,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-01-31 09:10:16,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2018-01-31 09:10:16,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-01-31 09:10:16,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2018-01-31 09:10:16,258 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 129 [2018-01-31 09:10:16,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:10:16,258 INFO L432 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2018-01-31 09:10:16,258 INFO L433 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-01-31 09:10:16,258 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2018-01-31 09:10:16,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-01-31 09:10:16,259 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:10:16,260 INFO L351 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-31 09:10:16,260 INFO L371 AbstractCegarLoop]: === Iteration 17 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:10:16,260 INFO L82 PathProgramCache]: Analyzing trace with hash 473424971, now seen corresponding path program 3 times [2018-01-31 09:10:16,260 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:10:16,260 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:10:16,261 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:16,261 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:10:16,261 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:10:16,286 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:10:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2018-01-31 09:10:16,426 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:10:16,452 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 [2018-01-31 09:10:16,458 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-31 09:10:16,475 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:10:16,480 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:10:16,483 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:10:16,487 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:10:16,493 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:10:16,503 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:10:16,503 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:10:16,507 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:10:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 74 proven. 70 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-01-31 09:10:16,776 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:10:16,776 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2018-01-31 09:10:16,776 INFO L409 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-01-31 09:10:16,777 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-01-31 09:10:16,777 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2018-01-31 09:10:16,777 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 31 states. [2018-01-31 09:10:17,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:10:17,090 INFO L93 Difference]: Finished difference Result 175 states and 176 transitions. [2018-01-31 09:10:17,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-31 09:10:17,090 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 141 [2018-01-31 09:10:17,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:10:17,091 INFO L225 Difference]: With dead ends: 175 [2018-01-31 09:10:17,091 INFO L226 Difference]: Without dead ends: 159 [2018-01-31 09:10:17,092 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=1789, Unknown=0, NotChecked=0, Total=2256 [2018-01-31 09:10:17,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-01-31 09:10:17,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2018-01-31 09:10:17,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-01-31 09:10:17,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2018-01-31 09:10:17,100 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 141 [2018-01-31 09:10:17,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:10:17,100 INFO L432 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2018-01-31 09:10:17,100 INFO L433 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-01-31 09:10:17,100 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2018-01-31 09:10:17,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-01-31 09:10:17,101 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:10:17,101 INFO L351 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-31 09:10:17,101 INFO L371 AbstractCegarLoop]: === Iteration 18 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:10:17,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1644437887, now seen corresponding path program 4 times [2018-01-31 09:10:17,101 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:10:17,101 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:10:17,102 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:17,102 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:10:17,102 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:10:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:10:17,122 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:10:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2018-01-31 09:10:17,292 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:10:17,292 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 [2018-01-31 09:10:17,302 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-31 09:10:17,337 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:10:17,342 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:10:17,347 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 6 treesize of output 5 [2018-01-31 09:10:17,348 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-31 09:10:17,348 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-31 09:10:17,349 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-01-31 09:10:17,364 INFO L700 Elim1Store]: detected not equals via solver [2018-01-31 09:10:17,365 INFO L700 Elim1Store]: detected not equals via solver [2018-01-31 09:10:17,366 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-01-31 09:10:17,366 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-31 09:10:17,368 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-31 09:10:17,368 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:8 [2018-01-31 09:10:17,451 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2018-01-31 09:10:17,453 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 [2018-01-31 09:10:17,453 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-31 09:10:17,454 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-31 09:10:17,457 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-31 09:10:17,458 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2018-01-31 09:10:17,474 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2018-01-31 09:10:17,474 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-31 09:10:17,478 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-31 09:10:17,478 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2018-01-31 09:11:28,182 WARN L143 SmtUtils]: Spent 238ms on a formula simplification that was a NOOP. DAG size: 76 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown