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_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-5f7ec6e [2018-01-31 09:07:19,843 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-31 09:07:19,845 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-31 09:07:19,860 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-31 09:07:19,860 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-31 09:07:19,861 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-31 09:07:19,862 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-31 09:07:19,864 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-31 09:07:19,867 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-31 09:07:19,867 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-31 09:07:19,868 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-31 09:07:19,869 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-31 09:07:19,870 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-31 09:07:19,871 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-31 09:07:19,872 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-31 09:07:19,883 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-31 09:07:19,886 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-31 09:07:19,888 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-31 09:07:19,889 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-31 09:07:19,890 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-31 09:07:19,901 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-31 09:07:19,902 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-31 09:07:19,902 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-31 09:07:19,903 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-31 09:07:19,904 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-31 09:07:19,905 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-31 09:07:19,905 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-31 09:07:19,906 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-31 09:07:19,906 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-31 09:07:19,907 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-31 09:07:19,912 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-31 09:07:19,913 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 09:07:19,933 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-31 09:07:19,933 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-31 09:07:19,934 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-31 09:07:19,934 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-31 09:07:19,934 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-31 09:07:19,934 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-31 09:07:19,935 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-31 09:07:19,935 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-31 09:07:19,935 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-31 09:07:19,935 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-31 09:07:19,936 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-31 09:07:19,936 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-31 09:07:19,937 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-31 09:07:19,937 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-31 09:07:19,937 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-31 09:07:19,937 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-31 09:07:19,938 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-31 09:07:19,938 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-31 09:07:19,938 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-31 09:07:19,938 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-01-31 09:07:19,938 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-31 09:07:19,938 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-31 09:07:19,939 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-31 09:07:19,939 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-31 09:07:19,939 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-31 09:07:19,939 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-31 09:07:19,939 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-31 09:07:19,940 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-31 09:07:19,940 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-31 09:07:19,940 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-31 09:07:19,941 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-31 09:07:19,942 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-31 09:07:19,943 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-31 09:07:19,943 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-31 09:07:20,000 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-31 09:07:20,016 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-31 09:07:20,023 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-31 09:07:20,025 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-31 09:07:20,025 INFO L276 PluginConnector]: CDTParser initialized [2018-01-31 09:07:20,027 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/960521-1_false-valid-deref.i [2018-01-31 09:07:20,204 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-31 09:07:20,212 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-31 09:07:20,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-31 09:07:20,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-31 09:07:20,219 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-31 09:07:20,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:07:20" (1/1) ... [2018-01-31 09:07:20,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b40042d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:07:20, skipping insertion in model container [2018-01-31 09:07:20,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:07:20" (1/1) ... [2018-01-31 09:07:20,244 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-31 09:07:20,309 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-31 09:07:20,479 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-31 09:07:20,511 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-31 09:07:20,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:07:20 WrapperNode [2018-01-31 09:07:20,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-31 09:07:20,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-31 09:07:20,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-31 09:07:20,527 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-31 09:07:20,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:07:20" (1/1) ... [2018-01-31 09:07:20,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:07:20" (1/1) ... [2018-01-31 09:07:20,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:07:20" (1/1) ... [2018-01-31 09:07:20,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:07:20" (1/1) ... [2018-01-31 09:07:20,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:07:20" (1/1) ... [2018-01-31 09:07:20,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:07:20" (1/1) ... [2018-01-31 09:07:20,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:07:20" (1/1) ... [2018-01-31 09:07:20,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-31 09:07:20,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-31 09:07:20,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-31 09:07:20,567 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-31 09:07:20,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:07:20" (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 09:07:20,626 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-31 09:07:20,626 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-31 09:07:20,626 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-31 09:07:20,626 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-31 09:07:20,627 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-31 09:07:20,627 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-31 09:07:20,628 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-31 09:07:20,628 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-31 09:07:20,628 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-31 09:07:20,628 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-31 09:07:20,628 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-31 09:07:20,628 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-31 09:07:20,629 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-31 09:07:20,629 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-31 09:07:20,629 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-31 09:07:21,137 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-31 09:07:21,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:07:21 BoogieIcfgContainer [2018-01-31 09:07:21,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-31 09:07:21,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-31 09:07:21,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-31 09:07:21,141 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-31 09:07:21,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:07:20" (1/3) ... [2018-01-31 09:07:21,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56621f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:07:21, skipping insertion in model container [2018-01-31 09:07:21,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:07:20" (2/3) ... [2018-01-31 09:07:21,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56621f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:07:21, skipping insertion in model container [2018-01-31 09:07:21,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:07:21" (3/3) ... [2018-01-31 09:07:21,145 INFO L107 eAbstractionObserver]: Analyzing ICFG 960521-1_false-valid-deref.i [2018-01-31 09:07:21,151 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-31 09:07:21,157 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 17 error locations. [2018-01-31 09:07:21,217 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-31 09:07:21,217 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-31 09:07:21,217 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-31 09:07:21,217 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-31 09:07:21,218 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-31 09:07:21,218 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-31 09:07:21,218 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-31 09:07:21,218 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-31 09:07:21,219 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-31 09:07:21,241 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2018-01-31 09:07:21,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-31 09:07:21,250 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:21,251 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 09:07:21,251 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 09:07:21,257 INFO L82 PathProgramCache]: Analyzing trace with hash 608637057, now seen corresponding path program 1 times [2018-01-31 09:07:21,259 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:21,259 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:21,316 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:21,316 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:07:21,316 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:21,409 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:21,671 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 09:07:21,673 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-31 09:07:21,673 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-31 09:07:21,674 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-31 09:07:21,689 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-31 09:07:21,689 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-31 09:07:21,692 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 5 states. [2018-01-31 09:07:22,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:22,324 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2018-01-31 09:07:22,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-31 09:07:22,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-01-31 09:07:22,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:22,335 INFO L225 Difference]: With dead ends: 99 [2018-01-31 09:07:22,336 INFO L226 Difference]: Without dead ends: 60 [2018-01-31 09:07:22,340 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-31 09:07:22,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-31 09:07:22,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-01-31 09:07:22,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-31 09:07:22,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-01-31 09:07:22,375 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 17 [2018-01-31 09:07:22,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:22,376 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-01-31 09:07:22,376 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-31 09:07:22,376 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-01-31 09:07:22,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-31 09:07:22,377 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:22,377 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 09:07:22,377 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 09:07:22,378 INFO L82 PathProgramCache]: Analyzing trace with hash 608637058, now seen corresponding path program 1 times [2018-01-31 09:07:22,378 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:22,378 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:22,379 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:22,379 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:07:22,379 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:22,403 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:22,541 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 09:07:22,541 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-31 09:07:22,541 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-31 09:07:22,543 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-31 09:07:22,543 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-31 09:07:22,544 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-31 09:07:22,544 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 6 states. [2018-01-31 09:07:22,815 WARN L143 SmtUtils]: Spent 103ms on a formula simplification that was a NOOP. DAG size: 17 [2018-01-31 09:07:22,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:22,983 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-01-31 09:07:22,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-31 09:07:22,984 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-01-31 09:07:22,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:22,985 INFO L225 Difference]: With dead ends: 60 [2018-01-31 09:07:22,985 INFO L226 Difference]: Without dead ends: 59 [2018-01-31 09:07:22,986 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 09:07:22,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-31 09:07:22,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-01-31 09:07:22,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-01-31 09:07:22,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-01-31 09:07:22,995 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 17 [2018-01-31 09:07:22,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:22,996 INFO L432 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-01-31 09:07:22,996 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-31 09:07:22,996 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-01-31 09:07:22,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-31 09:07:22,997 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:22,997 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 09:07:22,997 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 09:07:22,997 INFO L82 PathProgramCache]: Analyzing trace with hash 186914476, now seen corresponding path program 1 times [2018-01-31 09:07:22,998 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:22,998 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:22,999 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:22,999 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:07:22,999 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:23,021 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:23,170 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 09:07:23,171 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-31 09:07:23,171 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-31 09:07:23,171 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-31 09:07:23,171 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-31 09:07:23,171 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-31 09:07:23,172 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 4 states. [2018-01-31 09:07:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:23,483 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-01-31 09:07:23,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-31 09:07:23,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2018-01-31 09:07:23,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:23,485 INFO L225 Difference]: With dead ends: 59 [2018-01-31 09:07:23,485 INFO L226 Difference]: Without dead ends: 56 [2018-01-31 09:07:23,485 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 09:07:23,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-31 09:07:23,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-01-31 09:07:23,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-31 09:07:23,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-01-31 09:07:23,495 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 24 [2018-01-31 09:07:23,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:23,495 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-01-31 09:07:23,495 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-31 09:07:23,495 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-01-31 09:07:23,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-31 09:07:23,496 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:23,499 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 09:07:23,499 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 09:07:23,499 INFO L82 PathProgramCache]: Analyzing trace with hash 186914477, now seen corresponding path program 1 times [2018-01-31 09:07:23,499 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:23,499 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:23,500 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:23,500 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:07:23,501 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:23,541 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:23,795 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 09:07:23,796 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-31 09:07:23,837 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-31 09:07:23,838 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-31 09:07:23,838 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-31 09:07:23,838 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-01-31 09:07:23,839 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 7 states. [2018-01-31 09:07:23,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:23,965 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2018-01-31 09:07:23,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-31 09:07:23,966 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2018-01-31 09:07:23,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:23,967 INFO L225 Difference]: With dead ends: 94 [2018-01-31 09:07:23,968 INFO L226 Difference]: Without dead ends: 65 [2018-01-31 09:07:23,968 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 09:07:23,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-01-31 09:07:23,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2018-01-31 09:07:23,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-01-31 09:07:23,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-01-31 09:07:23,978 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 24 [2018-01-31 09:07:23,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:23,978 INFO L432 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-01-31 09:07:23,978 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-31 09:07:23,978 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-01-31 09:07:23,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-31 09:07:23,979 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:23,979 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 09:07:23,980 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 09:07:23,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1679529059, now seen corresponding path program 1 times [2018-01-31 09:07:23,980 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:23,980 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:23,981 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:23,981 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:07:23,981 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:23,999 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:24,355 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 09:07:24,356 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:07:24,356 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 09:07:24,372 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:07:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:24,426 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:07:24,464 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 09:07:24,466 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-31 09:07:24,504 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-31 09:07:24,504 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2018-01-31 09:07:24,602 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 09:07:24,603 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-31 09:07:24,611 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 09:07:24,611 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:21 [2018-01-31 09:07:24,938 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 09:07:24,970 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:07:24,971 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-01-31 09:07:24,971 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-31 09:07:24,971 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-31 09:07:24,971 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-01-31 09:07:24,972 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 13 states. [2018-01-31 09:07:25,332 WARN L146 SmtUtils]: Spent 152ms on a formula simplification. DAG size of input: 28 DAG size of output 24 [2018-01-31 09:07:25,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:25,466 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2018-01-31 09:07:25,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-31 09:07:25,467 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2018-01-31 09:07:25,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:25,468 INFO L225 Difference]: With dead ends: 100 [2018-01-31 09:07:25,468 INFO L226 Difference]: Without dead ends: 71 [2018-01-31 09:07:25,469 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 09:07:25,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-01-31 09:07:25,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2018-01-31 09:07:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-01-31 09:07:25,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-01-31 09:07:25,478 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 30 [2018-01-31 09:07:25,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:25,478 INFO L432 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-01-31 09:07:25,479 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-31 09:07:25,479 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-01-31 09:07:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-31 09:07:25,480 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:25,480 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 09:07:25,480 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 09:07:25,480 INFO L82 PathProgramCache]: Analyzing trace with hash -294686311, now seen corresponding path program 2 times [2018-01-31 09:07:25,480 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:25,480 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:25,481 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:25,482 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:07:25,482 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:25,503 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:25,984 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 09:07:25,985 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:07:25,985 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-31 09:07:25,990 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-31 09:07:26,009 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:26,014 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:26,015 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:07:26,018 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:07:26,035 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 09:07:26,035 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-31 09:07:26,041 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 09:07:26,041 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-31 09:07:26,045 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-31 09:07:26,045 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:18, output treesize:16 [2018-01-31 09:07:26,076 INFO L700 Elim1Store]: detected not equals via solver [2018-01-31 09:07:26,077 INFO L700 Elim1Store]: detected not equals via solver [2018-01-31 09:07:26,087 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 09:07:26,087 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-31 09:07:26,100 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 09:07:26,101 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-31 09:07:26,110 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 09:07:26,110 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:22 [2018-01-31 09:07:26,328 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 09:07:26,360 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:07:26,360 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-01-31 09:07:26,360 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-31 09:07:26,361 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-31 09:07:26,361 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2018-01-31 09:07:26,361 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 20 states. [2018-01-31 09:07:27,562 WARN L146 SmtUtils]: Spent 288ms on a formula simplification. DAG size of input: 37 DAG size of output 34 [2018-01-31 09:07:28,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:28,197 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2018-01-31 09:07:28,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-01-31 09:07:28,197 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2018-01-31 09:07:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:28,198 INFO L225 Difference]: With dead ends: 105 [2018-01-31 09:07:28,198 INFO L226 Difference]: Without dead ends: 76 [2018-01-31 09:07:28,199 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2018-01-31 09:07:28,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-01-31 09:07:28,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2018-01-31 09:07:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-01-31 09:07:28,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2018-01-31 09:07:28,207 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 36 [2018-01-31 09:07:28,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:28,207 INFO L432 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2018-01-31 09:07:28,208 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-31 09:07:28,208 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2018-01-31 09:07:28,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-01-31 09:07:28,209 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:28,209 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 09:07:28,209 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 09:07:28,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1273956393, now seen corresponding path program 1 times [2018-01-31 09:07:28,210 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:28,210 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:28,211 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:28,211 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:07:28,211 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:28,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:28,225 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:28,462 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 09:07:28,462 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:07:28,463 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 09:07:28,469 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:07:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:28,505 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:07:28,673 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 09:07:28,693 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:07:28,693 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-01-31 09:07:28,694 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-31 09:07:28,694 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-31 09:07:28,694 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2018-01-31 09:07:28,694 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 17 states. [2018-01-31 09:07:28,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:28,909 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2018-01-31 09:07:28,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-31 09:07:28,948 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2018-01-31 09:07:28,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:28,949 INFO L225 Difference]: With dead ends: 110 [2018-01-31 09:07:28,949 INFO L226 Difference]: Without dead ends: 82 [2018-01-31 09:07:28,950 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2018-01-31 09:07:28,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-01-31 09:07:28,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2018-01-31 09:07:28,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-01-31 09:07:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2018-01-31 09:07:28,964 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 45 [2018-01-31 09:07:28,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:28,964 INFO L432 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2018-01-31 09:07:28,964 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-31 09:07:28,964 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2018-01-31 09:07:28,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-01-31 09:07:28,966 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:28,966 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 09:07:28,966 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 09:07:28,966 INFO L82 PathProgramCache]: Analyzing trace with hash -225814477, now seen corresponding path program 2 times [2018-01-31 09:07:28,966 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:28,966 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:28,967 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:28,967 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:07:28,967 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:28,982 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:29,099 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 09:07:29,100 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:07:29,100 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 09:07:29,105 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-31 09:07:29,123 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:29,131 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:07:29,134 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:07:29,143 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 09:07:29,143 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-31 09:07:29,242 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 09:07:29,242 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:14 [2018-01-31 09:07:29,508 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 09:07:29,528 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-31 09:07:29,528 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2018-01-31 09:07:29,529 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-31 09:07:29,529 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-31 09:07:29,529 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2018-01-31 09:07:29,529 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 19 states. [2018-01-31 09:07:30,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:30,306 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2018-01-31 09:07:30,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-31 09:07:30,306 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2018-01-31 09:07:30,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:30,307 INFO L225 Difference]: With dead ends: 101 [2018-01-31 09:07:30,307 INFO L226 Difference]: Without dead ends: 73 [2018-01-31 09:07:30,308 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 09:07:30,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-31 09:07:30,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2018-01-31 09:07:30,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-01-31 09:07:30,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-01-31 09:07:30,317 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 51 [2018-01-31 09:07:30,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:30,318 INFO L432 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-01-31 09:07:30,318 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-31 09:07:30,318 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-01-31 09:07:30,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-01-31 09:07:30,319 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:30,320 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 09:07:30,320 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 09:07:30,320 INFO L82 PathProgramCache]: Analyzing trace with hash -921316877, now seen corresponding path program 1 times [2018-01-31 09:07:30,320 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:30,320 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:30,321 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:30,322 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:07:30,322 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:30,338 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:30,627 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 09:07:30,627 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:07:30,627 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 09:07:30,635 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:07:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:30,681 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:07:30,824 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 09:07:30,857 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:07:30,857 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-01-31 09:07:30,857 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-01-31 09:07:30,857 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-01-31 09:07:30,858 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2018-01-31 09:07:30,858 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 25 states. [2018-01-31 09:07:31,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:31,116 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2018-01-31 09:07:31,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-31 09:07:31,116 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2018-01-31 09:07:31,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:31,118 INFO L225 Difference]: With dead ends: 94 [2018-01-31 09:07:31,118 INFO L226 Difference]: Without dead ends: 79 [2018-01-31 09:07:31,119 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2018-01-31 09:07:31,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-01-31 09:07:31,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2018-01-31 09:07:31,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-01-31 09:07:31,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-01-31 09:07:31,128 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 63 [2018-01-31 09:07:31,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:31,128 INFO L432 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-01-31 09:07:31,129 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-01-31 09:07:31,129 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-01-31 09:07:31,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-01-31 09:07:31,130 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:31,130 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 09:07:31,130 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 09:07:31,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1713697661, now seen corresponding path program 2 times [2018-01-31 09:07:31,131 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:31,131 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:31,132 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:31,132 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:07:31,132 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:31,147 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:31,409 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 09:07:31,409 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:07:31,409 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 09:07:31,414 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-31 09:07:31,431 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:31,439 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:31,441 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:07:31,444 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:07:31,718 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 09:07:31,737 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:07:31,737 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2018-01-31 09:07:31,738 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-01-31 09:07:31,738 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-01-31 09:07:31,738 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2018-01-31 09:07:31,739 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 29 states. [2018-01-31 09:07:32,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:32,238 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2018-01-31 09:07:32,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-31 09:07:32,238 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 69 [2018-01-31 09:07:32,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:32,239 INFO L225 Difference]: With dead ends: 100 [2018-01-31 09:07:32,239 INFO L226 Difference]: Without dead ends: 85 [2018-01-31 09:07:32,240 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=484, Invalid=1156, Unknown=0, NotChecked=0, Total=1640 [2018-01-31 09:07:32,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-01-31 09:07:32,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2018-01-31 09:07:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-01-31 09:07:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-01-31 09:07:32,249 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 69 [2018-01-31 09:07:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:32,249 INFO L432 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-01-31 09:07:32,249 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-01-31 09:07:32,250 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-01-31 09:07:32,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-01-31 09:07:32,251 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:32,251 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 09:07:32,251 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 09:07:32,251 INFO L82 PathProgramCache]: Analyzing trace with hash -307018361, now seen corresponding path program 3 times [2018-01-31 09:07:32,251 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:32,252 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:32,252 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:32,252 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:07:32,252 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:32,269 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:33,807 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 09:07:33,808 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:07:33,808 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 09:07:33,816 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-31 09:07:33,831 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:07:33,835 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:07:33,836 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:07:33,840 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:07:33,845 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 09:07:33,845 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-31 09:07:33,849 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 09:07:33,849 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:14 [2018-01-31 09:07:34,112 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 09:07:34,132 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:07:34,132 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2018-01-31 09:07:34,133 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-01-31 09:07:34,133 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-01-31 09:07:34,133 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2018-01-31 09:07:34,133 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 25 states. [2018-01-31 09:07:35,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:35,193 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2018-01-31 09:07:35,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-01-31 09:07:35,193 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 75 [2018-01-31 09:07:35,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:35,194 INFO L225 Difference]: With dead ends: 112 [2018-01-31 09:07:35,194 INFO L226 Difference]: Without dead ends: 97 [2018-01-31 09:07:35,195 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=630, Invalid=2340, Unknown=0, NotChecked=0, Total=2970 [2018-01-31 09:07:35,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-01-31 09:07:35,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2018-01-31 09:07:35,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-01-31 09:07:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2018-01-31 09:07:35,206 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 75 [2018-01-31 09:07:35,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:35,206 INFO L432 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2018-01-31 09:07:35,206 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-01-31 09:07:35,206 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2018-01-31 09:07:35,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-01-31 09:07:35,208 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:35,208 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 09:07:35,208 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 09:07:35,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1495560775, now seen corresponding path program 4 times [2018-01-31 09:07:35,208 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:35,209 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:35,209 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:35,210 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:07:35,210 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:35,229 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:35,450 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 09:07:35,450 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:07:35,450 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 09:07:35,457 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-31 09:07:35,483 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:07:35,487 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:07:35,494 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 09:07:35,494 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-31 09:07:35,497 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-31 09:07:35,497 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2018-01-31 09:07:36,231 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 09:07:36,252 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:07:36,253 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 46 [2018-01-31 09:07:36,253 INFO L409 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-01-31 09:07:36,254 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-01-31 09:07:36,254 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1846, Unknown=0, NotChecked=0, Total=2070 [2018-01-31 09:07:36,255 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 46 states. [2018-01-31 09:07:38,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:38,791 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2018-01-31 09:07:38,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-01-31 09:07:38,791 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 87 [2018-01-31 09:07:38,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:38,792 INFO L225 Difference]: With dead ends: 130 [2018-01-31 09:07:38,792 INFO L226 Difference]: Without dead ends: 109 [2018-01-31 09:07:38,793 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1008, Invalid=6302, Unknown=0, NotChecked=0, Total=7310 [2018-01-31 09:07:38,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-01-31 09:07:38,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2018-01-31 09:07:38,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-01-31 09:07:38,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2018-01-31 09:07:38,810 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 87 [2018-01-31 09:07:38,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:38,810 INFO L432 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2018-01-31 09:07:38,810 INFO L433 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-01-31 09:07:38,811 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2018-01-31 09:07:38,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-01-31 09:07:38,812 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:38,812 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 09:07:38,812 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 09:07:38,812 INFO L82 PathProgramCache]: Analyzing trace with hash -552939513, now seen corresponding path program 5 times [2018-01-31 09:07:38,813 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:38,813 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:38,813 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:38,814 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:07:38,814 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:38,834 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:39,111 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 09:07:39,111 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:07:39,138 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 09:07:39,143 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-31 09:07:39,153 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:39,155 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:39,156 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:39,158 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:39,161 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:39,163 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:39,167 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:39,174 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:39,182 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:39,216 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:39,218 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:07:39,222 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:07:39,865 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 09:07:39,885 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:07:39,885 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2018-01-31 09:07:39,885 INFO L409 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-01-31 09:07:39,886 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-01-31 09:07:39,886 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1261, Unknown=0, NotChecked=0, Total=1640 [2018-01-31 09:07:39,886 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 41 states. [2018-01-31 09:07:40,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:40,191 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-01-31 09:07:40,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-31 09:07:40,191 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 99 [2018-01-31 09:07:40,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:40,192 INFO L225 Difference]: With dead ends: 140 [2018-01-31 09:07:40,192 INFO L226 Difference]: Without dead ends: 113 [2018-01-31 09:07:40,194 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=964, Invalid=2458, Unknown=0, NotChecked=0, Total=3422 [2018-01-31 09:07:40,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-01-31 09:07:40,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2018-01-31 09:07:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-01-31 09:07:40,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2018-01-31 09:07:40,201 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 99 [2018-01-31 09:07:40,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:40,202 INFO L432 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2018-01-31 09:07:40,202 INFO L433 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-01-31 09:07:40,202 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2018-01-31 09:07:40,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-01-31 09:07:40,203 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:40,203 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 09:07:40,203 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 09:07:40,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1688898415, now seen corresponding path program 6 times [2018-01-31 09:07:40,203 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:40,203 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:40,204 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:40,204 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:07:40,204 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:40,226 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:40,918 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 09:07:40,918 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:07:40,918 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 09:07:40,925 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-31 09:07:40,940 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:07:40,961 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:07:40,976 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:07:40,985 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:07:40,988 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:07:40,997 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 09:07:40,997 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-31 09:07:41,001 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 09:07:41,002 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:14 [2018-01-31 09:07:42,322 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 09:07:42,342 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-31 09:07:42,342 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [24] total 32 [2018-01-31 09:07:42,343 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-31 09:07:42,343 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-31 09:07:42,343 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2018-01-31 09:07:42,344 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 32 states. [2018-01-31 09:07:43,295 WARN L143 SmtUtils]: Spent 117ms on a formula simplification that was a NOOP. DAG size: 18 [2018-01-31 09:07:44,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:44,375 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2018-01-31 09:07:44,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-01-31 09:07:44,405 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 105 [2018-01-31 09:07:44,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:44,406 INFO L225 Difference]: With dead ends: 145 [2018-01-31 09:07:44,406 INFO L226 Difference]: Without dead ends: 118 [2018-01-31 09:07:44,408 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1127, Invalid=4423, Unknown=0, NotChecked=0, Total=5550 [2018-01-31 09:07:44,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-01-31 09:07:44,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2018-01-31 09:07:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-01-31 09:07:44,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-01-31 09:07:44,417 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 105 [2018-01-31 09:07:44,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:44,417 INFO L432 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-01-31 09:07:44,417 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-31 09:07:44,417 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-01-31 09:07:44,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-01-31 09:07:44,418 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:44,419 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] [2018-01-31 09:07:44,419 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 09:07:44,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1307291704, now seen corresponding path program 1 times [2018-01-31 09:07:44,419 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:44,419 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:44,420 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:44,420 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:07:44,420 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:44,437 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:44,751 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 09:07:44,751 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:07:44,752 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 09:07:44,757 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:07:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:44,789 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:07:45,094 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 09:07:45,114 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:07:45,114 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 26] total 33 [2018-01-31 09:07:45,115 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-01-31 09:07:45,115 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-01-31 09:07:45,115 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=831, Unknown=0, NotChecked=0, Total=1056 [2018-01-31 09:07:45,115 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 33 states. [2018-01-31 09:07:45,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:45,690 INFO L93 Difference]: Finished difference Result 157 states and 160 transitions. [2018-01-31 09:07:45,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-01-31 09:07:45,690 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 113 [2018-01-31 09:07:45,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:45,691 INFO L225 Difference]: With dead ends: 157 [2018-01-31 09:07:45,692 INFO L226 Difference]: Without dead ends: 132 [2018-01-31 09:07:45,693 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=957, Invalid=2825, Unknown=0, NotChecked=0, Total=3782 [2018-01-31 09:07:45,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-01-31 09:07:45,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2018-01-31 09:07:45,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-01-31 09:07:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2018-01-31 09:07:45,702 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 113 [2018-01-31 09:07:45,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:45,703 INFO L432 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2018-01-31 09:07:45,703 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-01-31 09:07:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2018-01-31 09:07:45,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-01-31 09:07:45,704 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:45,704 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] [2018-01-31 09:07:45,705 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 09:07:45,705 INFO L82 PathProgramCache]: Analyzing trace with hash -721506168, now seen corresponding path program 2 times [2018-01-31 09:07:45,705 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:45,705 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:45,706 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:45,706 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:07:45,706 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:45,725 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:46,272 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 09:07:46,273 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:07:46,273 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 09:07:46,277 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-31 09:07:46,296 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:46,311 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:46,313 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:07:46,317 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:07:46,662 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 09:07:46,682 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:07:46,682 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 28] total 37 [2018-01-31 09:07:46,682 INFO L409 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-01-31 09:07:46,683 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-01-31 09:07:46,683 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2018-01-31 09:07:46,683 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 37 states. [2018-01-31 09:07:47,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:47,295 INFO L93 Difference]: Finished difference Result 175 states and 178 transitions. [2018-01-31 09:07:47,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-01-31 09:07:47,295 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 125 [2018-01-31 09:07:47,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:47,296 INFO L225 Difference]: With dead ends: 175 [2018-01-31 09:07:47,296 INFO L226 Difference]: Without dead ends: 144 [2018-01-31 09:07:47,298 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1174, Invalid=3656, Unknown=0, NotChecked=0, Total=4830 [2018-01-31 09:07:47,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-01-31 09:07:47,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2018-01-31 09:07:47,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-01-31 09:07:47,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2018-01-31 09:07:47,307 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 125 [2018-01-31 09:07:47,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:47,307 INFO L432 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2018-01-31 09:07:47,308 INFO L433 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-01-31 09:07:47,308 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2018-01-31 09:07:47,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-01-31 09:07:47,309 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:47,309 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] [2018-01-31 09:07:47,309 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 09:07:47,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1196327496, now seen corresponding path program 3 times [2018-01-31 09:07:47,309 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:47,310 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:47,310 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:47,310 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:07:47,311 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:47,333 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:47,543 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 09:07:47,544 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:07:47,544 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 09:07:47,548 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-31 09:07:47,565 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:07:47,569 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:07:47,572 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:07:47,578 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:07:47,583 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:07:47,589 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:07:47,590 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:07:47,593 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:07:47,874 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 09:07:47,894 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:07:47,894 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2018-01-31 09:07:47,894 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-31 09:07:47,894 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-31 09:07:47,895 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2018-01-31 09:07:47,895 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 32 states. [2018-01-31 09:07:48,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:48,425 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2018-01-31 09:07:48,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-31 09:07:48,425 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 137 [2018-01-31 09:07:48,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:48,426 INFO L225 Difference]: With dead ends: 151 [2018-01-31 09:07:48,426 INFO L226 Difference]: Without dead ends: 147 [2018-01-31 09:07:48,427 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=481, Invalid=1969, Unknown=0, NotChecked=0, Total=2450 [2018-01-31 09:07:48,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-01-31 09:07:48,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2018-01-31 09:07:48,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-01-31 09:07:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2018-01-31 09:07:48,439 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 137 [2018-01-31 09:07:48,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:48,439 INFO L432 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2018-01-31 09:07:48,440 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-31 09:07:48,440 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2018-01-31 09:07:48,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-01-31 09:07:48,441 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:48,441 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] [2018-01-31 09:07:48,441 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 09:07:48,442 INFO L82 PathProgramCache]: Analyzing trace with hash 107218814, now seen corresponding path program 4 times [2018-01-31 09:07:48,442 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:48,442 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:48,442 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:48,443 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:07:48,443 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:48,469 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:48,616 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 09:07:48,617 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:07:48,617 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 09:07:48,622 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-31 09:07:48,958 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:07:48,962 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:07:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2018-01-31 09:07:49,427 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:07:49,448 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 30] total 43 [2018-01-31 09:07:49,449 INFO L409 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-01-31 09:07:49,449 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-01-31 09:07:49,450 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2018-01-31 09:07:49,450 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 43 states. [2018-01-31 09:07:50,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:50,308 INFO L93 Difference]: Finished difference Result 205 states and 208 transitions. [2018-01-31 09:07:50,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-01-31 09:07:50,308 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 143 [2018-01-31 09:07:50,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:50,309 INFO L225 Difference]: With dead ends: 205 [2018-01-31 09:07:50,309 INFO L226 Difference]: Without dead ends: 162 [2018-01-31 09:07:50,311 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1521, Invalid=5121, Unknown=0, NotChecked=0, Total=6642 [2018-01-31 09:07:50,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-01-31 09:07:50,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2018-01-31 09:07:50,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-01-31 09:07:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2018-01-31 09:07:50,322 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 143 [2018-01-31 09:07:50,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:50,323 INFO L432 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2018-01-31 09:07:50,323 INFO L433 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-01-31 09:07:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2018-01-31 09:07:50,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-01-31 09:07:50,324 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:50,324 INFO L351 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 8, 7, 7, 7, 7, 7, 1, 1, 1, 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 09:07:50,324 INFO L371 AbstractCegarLoop]: === Iteration 19 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:07:50,324 INFO L82 PathProgramCache]: Analyzing trace with hash 82442814, now seen corresponding path program 5 times [2018-01-31 09:07:50,324 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:50,325 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:50,327 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:50,327 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:07:50,327 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:50,348 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-01-31 09:07:50,585 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:07:50,585 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-31 09:07:50,590 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-31 09:07:50,600 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:50,603 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:50,605 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:50,607 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:50,609 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:50,612 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:50,615 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:50,619 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:50,625 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:50,633 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:50,646 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:50,681 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:50,816 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:50,871 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:50,919 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:50,921 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:07:50,925 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:07:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-01-31 09:07:50,973 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:07:50,973 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2018-01-31 09:07:50,973 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-31 09:07:50,973 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-31 09:07:50,974 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2018-01-31 09:07:50,974 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand 19 states. [2018-01-31 09:07:51,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:51,170 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-01-31 09:07:51,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-31 09:07:51,171 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 155 [2018-01-31 09:07:51,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:51,172 INFO L225 Difference]: With dead ends: 169 [2018-01-31 09:07:51,172 INFO L226 Difference]: Without dead ends: 165 [2018-01-31 09:07:51,173 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2018-01-31 09:07:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-01-31 09:07:51,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2018-01-31 09:07:51,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-01-31 09:07:51,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2018-01-31 09:07:51,187 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 155 [2018-01-31 09:07:51,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:51,188 INFO L432 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2018-01-31 09:07:51,188 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-31 09:07:51,188 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2018-01-31 09:07:51,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-01-31 09:07:51,189 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:51,189 INFO L351 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 9, 8, 8, 8, 8, 8, 1, 1, 1, 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 09:07:51,189 INFO L371 AbstractCegarLoop]: === Iteration 20 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:07:51,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1098436876, now seen corresponding path program 6 times [2018-01-31 09:07:51,190 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:51,190 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:51,190 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:51,190 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:07:51,191 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:51,211 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-01-31 09:07:51,463 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:07:51,463 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-31 09:07:51,470 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-31 09:07:51,487 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:07:51,490 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:07:51,493 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:07:51,496 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:07:51,500 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:07:51,508 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:07:51,520 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:07:51,542 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:07:51,550 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:07:51,578 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:07:51,645 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:07:51,679 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:07:51,730 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:07:51,802 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:07:51,890 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:07:51,891 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:07:51,895 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:07:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2018-01-31 09:07:52,854 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:07:52,854 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 36] total 53 [2018-01-31 09:07:52,854 INFO L409 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-01-31 09:07:52,855 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-01-31 09:07:52,855 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2316, Unknown=0, NotChecked=0, Total=2756 [2018-01-31 09:07:52,856 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 53 states. [2018-01-31 09:07:54,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:54,119 INFO L93 Difference]: Finished difference Result 235 states and 238 transitions. [2018-01-31 09:07:54,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-01-31 09:07:54,119 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 161 [2018-01-31 09:07:54,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:54,120 INFO L225 Difference]: With dead ends: 235 [2018-01-31 09:07:54,121 INFO L226 Difference]: Without dead ends: 180 [2018-01-31 09:07:54,122 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1971, Invalid=8331, Unknown=0, NotChecked=0, Total=10302 [2018-01-31 09:07:54,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-01-31 09:07:54,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 174. [2018-01-31 09:07:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-01-31 09:07:54,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2018-01-31 09:07:54,137 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 161 [2018-01-31 09:07:54,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:54,137 INFO L432 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2018-01-31 09:07:54,137 INFO L433 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-01-31 09:07:54,137 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2018-01-31 09:07:54,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-01-31 09:07:54,138 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:54,139 INFO L351 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 10, 9, 9, 9, 9, 9, 1, 1, 1, 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 09:07:54,139 INFO L371 AbstractCegarLoop]: === Iteration 21 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:07:54,139 INFO L82 PathProgramCache]: Analyzing trace with hash -78937420, now seen corresponding path program 7 times [2018-01-31 09:07:54,139 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:54,139 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:54,140 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:54,141 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:07:54,142 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:54,162 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-01-31 09:07:55,807 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:07:55,807 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-31 09:07:55,813 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:07:55,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:55,877 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:07:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-01-31 09:07:56,448 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:07:56,449 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 34] total 53 [2018-01-31 09:07:56,449 INFO L409 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-01-31 09:07:56,449 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-01-31 09:07:56,450 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=2262, Unknown=0, NotChecked=0, Total=2756 [2018-01-31 09:07:56,450 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 53 states. [2018-01-31 09:07:57,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:07:57,612 INFO L93 Difference]: Finished difference Result 253 states and 256 transitions. [2018-01-31 09:07:57,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-01-31 09:07:57,612 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 173 [2018-01-31 09:07:57,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:07:57,613 INFO L225 Difference]: With dead ends: 253 [2018-01-31 09:07:57,613 INFO L226 Difference]: Without dead ends: 192 [2018-01-31 09:07:57,614 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2530 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2248, Invalid=8054, Unknown=0, NotChecked=0, Total=10302 [2018-01-31 09:07:57,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-01-31 09:07:57,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 186. [2018-01-31 09:07:57,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-01-31 09:07:57,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2018-01-31 09:07:57,628 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 173 [2018-01-31 09:07:57,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:07:57,628 INFO L432 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2018-01-31 09:07:57,628 INFO L433 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-01-31 09:07:57,628 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2018-01-31 09:07:57,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-01-31 09:07:57,629 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:07:57,630 INFO L351 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 11, 10, 10, 10, 10, 10, 1, 1, 1, 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 09:07:57,630 INFO L371 AbstractCegarLoop]: === Iteration 22 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:07:57,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1366489228, now seen corresponding path program 8 times [2018-01-31 09:07:57,630 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:07:57,630 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:07:57,631 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:57,631 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:07:57,631 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:07:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:07:57,654 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:07:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2018-01-31 09:07:58,487 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:07:58,487 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-31 09:07:58,492 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-31 09:07:58,509 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:58,531 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:07:58,534 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:07:58,538 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:07:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2018-01-31 09:07:59,170 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:07:59,170 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 36] total 57 [2018-01-31 09:07:59,171 INFO L409 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-01-31 09:07:59,171 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-01-31 09:07:59,171 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=2627, Unknown=0, NotChecked=0, Total=3192 [2018-01-31 09:07:59,171 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 57 states. [2018-01-31 09:08:00,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:08:00,339 INFO L93 Difference]: Finished difference Result 271 states and 274 transitions. [2018-01-31 09:08:00,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-01-31 09:08:00,371 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 185 [2018-01-31 09:08:00,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:08:00,373 INFO L225 Difference]: With dead ends: 271 [2018-01-31 09:08:00,373 INFO L226 Difference]: Without dead ends: 204 [2018-01-31 09:08:00,374 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2974 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2591, Invalid=9399, Unknown=0, NotChecked=0, Total=11990 [2018-01-31 09:08:00,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-01-31 09:08:00,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 198. [2018-01-31 09:08:00,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-01-31 09:08:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2018-01-31 09:08:00,387 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 185 [2018-01-31 09:08:00,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:08:00,387 INFO L432 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2018-01-31 09:08:00,387 INFO L433 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-01-31 09:08:00,387 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2018-01-31 09:08:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-01-31 09:08:00,388 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:08:00,388 INFO L351 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 12, 11, 11, 11, 11, 11, 1, 1, 1, 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 09:08:00,388 INFO L371 AbstractCegarLoop]: === Iteration 23 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:08:00,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1248427316, now seen corresponding path program 9 times [2018-01-31 09:08:00,388 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:08:00,388 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:08:00,389 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:08:00,389 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:08:00,389 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:08:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:08:00,410 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:08:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2018-01-31 09:08:00,998 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:08:00,998 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-31 09:08:01,004 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-31 09:08:01,022 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:01,026 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:01,030 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:01,035 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:01,041 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:01,050 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:01,057 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:01,103 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:01,135 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:01,158 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:01,174 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:01,202 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:01,203 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:08:01,207 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:08:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2018-01-31 09:08:01,347 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:08:01,347 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2018-01-31 09:08:01,347 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-01-31 09:08:01,348 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-01-31 09:08:01,348 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2018-01-31 09:08:01,348 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 27 states. [2018-01-31 09:08:01,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:08:01,899 INFO L93 Difference]: Finished difference Result 211 states and 212 transitions. [2018-01-31 09:08:01,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-01-31 09:08:01,900 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 197 [2018-01-31 09:08:01,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:08:01,901 INFO L225 Difference]: With dead ends: 211 [2018-01-31 09:08:01,901 INFO L226 Difference]: Without dead ends: 207 [2018-01-31 09:08:01,901 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2018-01-31 09:08:01,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-01-31 09:08:01,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2018-01-31 09:08:01,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-01-31 09:08:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2018-01-31 09:08:01,917 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 197 [2018-01-31 09:08:01,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:08:01,917 INFO L432 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2018-01-31 09:08:01,917 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-01-31 09:08:01,917 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2018-01-31 09:08:01,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-01-31 09:08:01,918 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:08:01,919 INFO L351 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 13, 12, 12, 12, 12, 12, 1, 1, 1, 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 09:08:01,919 INFO L371 AbstractCegarLoop]: === Iteration 24 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:08:01,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1746542954, now seen corresponding path program 10 times [2018-01-31 09:08:01,919 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:08:01,919 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:08:01,920 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:08:01,920 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:08:01,920 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:08:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:08:01,942 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:08:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2018-01-31 09:08:03,256 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:08:03,256 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-31 09:08:03,261 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-31 09:08:04,628 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:08:04,634 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:08:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-01-31 09:08:05,336 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:08:05,336 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 38] total 63 [2018-01-31 09:08:05,336 INFO L409 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-01-31 09:08:05,337 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-01-31 09:08:05,337 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=681, Invalid=3225, Unknown=0, NotChecked=0, Total=3906 [2018-01-31 09:08:05,337 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 63 states. [2018-01-31 09:08:07,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:08:07,420 INFO L93 Difference]: Finished difference Result 301 states and 304 transitions. [2018-01-31 09:08:07,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-01-31 09:08:07,420 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 203 [2018-01-31 09:08:07,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:08:07,422 INFO L225 Difference]: With dead ends: 301 [2018-01-31 09:08:07,422 INFO L226 Difference]: Without dead ends: 222 [2018-01-31 09:08:07,423 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3716 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3138, Invalid=11624, Unknown=0, NotChecked=0, Total=14762 [2018-01-31 09:08:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-01-31 09:08:07,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 216. [2018-01-31 09:08:07,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-01-31 09:08:07,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2018-01-31 09:08:07,440 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 203 [2018-01-31 09:08:07,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:08:07,440 INFO L432 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2018-01-31 09:08:07,440 INFO L433 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-01-31 09:08:07,440 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2018-01-31 09:08:07,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-01-31 09:08:07,442 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:08:07,442 INFO L351 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 14, 13, 13, 13, 13, 13, 1, 1, 1, 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 09:08:07,442 INFO L371 AbstractCegarLoop]: === Iteration 25 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:08:07,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1923663830, now seen corresponding path program 11 times [2018-01-31 09:08:07,442 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:08:07,442 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:08:07,444 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:08:07,444 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:08:07,445 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:08:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:08:07,488 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:08:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2018-01-31 09:08:08,038 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:08:08,038 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-31 09:08:08,043 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-31 09:08:08,056 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:08,062 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:08,064 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:08,066 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:08,068 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:08,072 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:08,076 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:08,084 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:08,107 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:08,156 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:08,327 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:08,396 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:08,460 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:09,078 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:10,841 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:14,106 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:17,579 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:20,070 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:32,102 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:32,112 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:08:32,132 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:08:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2018-01-31 09:08:32,780 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:08:32,781 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2018-01-31 09:08:32,781 INFO L409 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-01-31 09:08:32,781 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-01-31 09:08:32,781 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2018-01-31 09:08:32,782 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand 31 states. [2018-01-31 09:08:33,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:08:33,693 INFO L93 Difference]: Finished difference Result 229 states and 230 transitions. [2018-01-31 09:08:33,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-01-31 09:08:33,693 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 215 [2018-01-31 09:08:33,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:08:33,695 INFO L225 Difference]: With dead ends: 229 [2018-01-31 09:08:33,695 INFO L226 Difference]: Without dead ends: 225 [2018-01-31 09:08:33,695 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2018-01-31 09:08:33,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-01-31 09:08:33,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2018-01-31 09:08:33,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-01-31 09:08:33,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2018-01-31 09:08:33,712 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 215 [2018-01-31 09:08:33,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:08:33,713 INFO L432 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2018-01-31 09:08:33,713 INFO L433 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-01-31 09:08:33,713 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2018-01-31 09:08:33,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-01-31 09:08:33,714 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:08:33,715 INFO L351 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 15, 14, 14, 14, 14, 14, 1, 1, 1, 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 09:08:33,715 INFO L371 AbstractCegarLoop]: === Iteration 26 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:08:33,715 INFO L82 PathProgramCache]: Analyzing trace with hash 563170272, now seen corresponding path program 12 times [2018-01-31 09:08:33,715 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:08:33,715 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:08:33,716 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:08:33,716 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:08:33,716 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:08:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:08:33,741 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:08:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2018-01-31 09:08:34,762 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:08:34,762 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-31 09:08:34,767 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-31 09:08:34,793 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:08:34,807 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:08:34,822 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:08:34,832 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:08:34,851 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:08:34,863 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:08:34,878 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:08:34,907 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:08:34,976 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:08:35,076 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:08:35,151 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:08:35,254 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:08:35,436 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:08:35,565 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:08:35,967 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:08:36,617 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:08:37,973 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:08:38,964 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:08:46,193 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-31 09:08:46,202 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:08:46,215 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:08:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-01-31 09:08:47,021 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:08:47,021 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 40] total 69 [2018-01-31 09:08:47,022 INFO L409 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-01-31 09:08:47,022 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-01-31 09:08:47,023 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=3881, Unknown=0, NotChecked=0, Total=4692 [2018-01-31 09:08:47,023 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 69 states. [2018-01-31 09:08:48,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:08:48,658 INFO L93 Difference]: Finished difference Result 331 states and 334 transitions. [2018-01-31 09:08:48,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-01-31 09:08:48,658 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 221 [2018-01-31 09:08:48,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:08:48,660 INFO L225 Difference]: With dead ends: 331 [2018-01-31 09:08:48,660 INFO L226 Difference]: Without dead ends: 240 [2018-01-31 09:08:48,660 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4532 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3747, Invalid=14075, Unknown=0, NotChecked=0, Total=17822 [2018-01-31 09:08:48,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-01-31 09:08:48,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 234. [2018-01-31 09:08:48,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-01-31 09:08:48,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2018-01-31 09:08:48,678 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 221 [2018-01-31 09:08:48,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:08:48,678 INFO L432 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2018-01-31 09:08:48,678 INFO L433 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-01-31 09:08:48,679 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2018-01-31 09:08:48,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-01-31 09:08:48,680 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:08:48,680 INFO L351 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 16, 15, 15, 15, 15, 15, 1, 1, 1, 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 09:08:48,680 INFO L371 AbstractCegarLoop]: === Iteration 27 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:08:48,681 INFO L82 PathProgramCache]: Analyzing trace with hash 123159456, now seen corresponding path program 13 times [2018-01-31 09:08:48,681 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:08:48,681 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:08:48,681 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:08:48,681 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:08:48,682 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:08:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:08:48,710 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:08:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1724 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2018-01-31 09:08:49,732 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:08:49,732 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-31 09:08:49,739 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:08:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:08:49,791 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:08:50,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1724 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-01-31 09:08:50,684 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:08:50,685 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 42] total 73 [2018-01-31 09:08:50,685 INFO L409 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-01-31 09:08:50,685 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-01-31 09:08:50,686 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=4353, Unknown=0, NotChecked=0, Total=5256 [2018-01-31 09:08:50,686 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 73 states. [2018-01-31 09:08:52,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:08:52,523 INFO L93 Difference]: Finished difference Result 349 states and 352 transitions. [2018-01-31 09:08:52,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-01-31 09:08:52,523 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 233 [2018-01-31 09:08:52,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:08:52,524 INFO L225 Difference]: With dead ends: 349 [2018-01-31 09:08:52,524 INFO L226 Difference]: Without dead ends: 252 [2018-01-31 09:08:52,526 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5115 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4191, Invalid=15831, Unknown=0, NotChecked=0, Total=20022 [2018-01-31 09:08:52,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-01-31 09:08:52,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 246. [2018-01-31 09:08:52,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-01-31 09:08:52,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2018-01-31 09:08:52,545 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 233 [2018-01-31 09:08:52,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:08:52,545 INFO L432 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2018-01-31 09:08:52,545 INFO L433 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-01-31 09:08:52,545 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2018-01-31 09:08:52,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-01-31 09:08:52,547 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:08:52,547 INFO L351 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 17, 16, 16, 16, 16, 16, 1, 1, 1, 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 09:08:52,547 INFO L371 AbstractCegarLoop]: === Iteration 28 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:08:52,547 INFO L82 PathProgramCache]: Analyzing trace with hash 2146430048, now seen corresponding path program 14 times [2018-01-31 09:08:52,548 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:08:52,548 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:08:52,548 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:08:52,548 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 09:08:52,549 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:08:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:08:52,575 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:08:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2018-01-31 09:08:53,328 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:08:53,328 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-31 09:08:53,333 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-31 09:08:53,356 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:53,404 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:08:53,409 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:08:53,415 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:08:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2018-01-31 09:08:54,373 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:08:54,373 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 44] total 77 [2018-01-31 09:08:54,373 INFO L409 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-01-31 09:08:54,374 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-01-31 09:08:54,374 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=4852, Unknown=0, NotChecked=0, Total=5852 [2018-01-31 09:08:54,374 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand 77 states. [2018-01-31 09:08:56,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:08:56,331 INFO L93 Difference]: Finished difference Result 367 states and 370 transitions. [2018-01-31 09:08:56,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-01-31 09:08:56,331 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 245 [2018-01-31 09:08:56,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:08:56,333 INFO L225 Difference]: With dead ends: 367 [2018-01-31 09:08:56,333 INFO L226 Difference]: Without dead ends: 264 [2018-01-31 09:08:56,334 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5733 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4660, Invalid=17690, Unknown=0, NotChecked=0, Total=22350 [2018-01-31 09:08:56,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-01-31 09:08:56,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 258. [2018-01-31 09:08:56,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-01-31 09:08:56,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2018-01-31 09:08:56,352 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 245 [2018-01-31 09:08:56,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:08:56,352 INFO L432 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2018-01-31 09:08:56,352 INFO L433 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-01-31 09:08:56,352 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2018-01-31 09:08:56,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-01-31 09:08:56,354 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:08:56,354 INFO L351 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 18, 17, 17, 17, 17, 17, 1, 1, 1, 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 09:08:56,354 INFO L371 AbstractCegarLoop]: === Iteration 29 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:08:56,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1701247456, now seen corresponding path program 15 times [2018-01-31 09:08:56,354 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:08:56,355 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:08:56,355 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:08:56,355 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:08:56,355 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:08:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:08:56,380 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:08:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2152 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2018-01-31 09:08:57,595 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:08:57,630 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-31 09:08:57,635 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-31 09:08:57,655 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:57,659 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:57,661 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:57,667 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:57,671 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:57,682 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:57,692 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:57,710 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:57,732 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:57,757 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:57,810 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:58,035 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:58,082 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:58,192 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:58,493 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:58,714 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:59,020 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:59,858 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-31 09:08:59,860 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:08:59,867 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:09:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2152 backedges. 122 proven. 850 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2018-01-31 09:09:00,945 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:09:00,946 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 45] total 80 [2018-01-31 09:09:00,946 INFO L409 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-01-31 09:09:00,946 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-01-31 09:09:00,947 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1136, Invalid=5184, Unknown=0, NotChecked=0, Total=6320 [2018-01-31 09:09:00,947 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand 80 states. [2018-01-31 09:09:02,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:09:02,038 INFO L93 Difference]: Finished difference Result 271 states and 272 transitions. [2018-01-31 09:09:02,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-01-31 09:09:02,039 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 257 [2018-01-31 09:09:02,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:09:02,040 INFO L225 Difference]: With dead ends: 271 [2018-01-31 09:09:02,040 INFO L226 Difference]: Without dead ends: 267 [2018-01-31 09:09:02,041 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4551 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3253, Invalid=11509, Unknown=0, NotChecked=0, Total=14762 [2018-01-31 09:09:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-01-31 09:09:02,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 264. [2018-01-31 09:09:02,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-01-31 09:09:02,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 265 transitions. [2018-01-31 09:09:02,058 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 265 transitions. Word has length 257 [2018-01-31 09:09:02,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:09:02,058 INFO L432 AbstractCegarLoop]: Abstraction has 264 states and 265 transitions. [2018-01-31 09:09:02,058 INFO L433 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-01-31 09:09:02,058 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 265 transitions. [2018-01-31 09:09:02,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-01-31 09:09:02,060 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:09:02,060 INFO L351 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 19, 18, 18, 18, 18, 18, 1, 1, 1, 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 09:09:02,060 INFO L371 AbstractCegarLoop]: === Iteration 30 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:09:02,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1396553386, now seen corresponding path program 16 times [2018-01-31 09:09:02,061 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:09:02,061 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:09:02,061 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:02,061 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:09:02,062 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:09:02,096 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:09:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2018-01-31 09:09:02,785 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:09:02,817 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-31 09:09:02,822 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-31 09:09:05,440 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-31 09:09:05,447 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-31 09:09:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 1302 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2018-01-31 09:09:06,561 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-31 09:09:06,561 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 46] total 83 [2018-01-31 09:09:06,561 INFO L409 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-01-31 09:09:06,562 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-01-31 09:09:06,562 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1160, Invalid=5646, Unknown=0, NotChecked=0, Total=6806 [2018-01-31 09:09:06,562 INFO L87 Difference]: Start difference. First operand 264 states and 265 transitions. Second operand 83 states. [2018-01-31 09:09:08,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 09:09:08,853 INFO L93 Difference]: Finished difference Result 397 states and 400 transitions. [2018-01-31 09:09:08,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-01-31 09:09:08,853 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 263 [2018-01-31 09:09:08,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 09:09:08,854 INFO L225 Difference]: With dead ends: 397 [2018-01-31 09:09:08,854 INFO L226 Difference]: Without dead ends: 282 [2018-01-31 09:09:08,856 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6727 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5407, Invalid=20675, Unknown=0, NotChecked=0, Total=26082 [2018-01-31 09:09:08,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-01-31 09:09:08,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 276. [2018-01-31 09:09:08,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-01-31 09:09:08,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 277 transitions. [2018-01-31 09:09:08,874 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 277 transitions. Word has length 263 [2018-01-31 09:09:08,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 09:09:08,874 INFO L432 AbstractCegarLoop]: Abstraction has 276 states and 277 transitions. [2018-01-31 09:09:08,874 INFO L433 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-01-31 09:09:08,874 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 277 transitions. [2018-01-31 09:09:08,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-01-31 09:09:08,876 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 09:09:08,876 INFO L351 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 20, 19, 19, 19, 19, 19, 1, 1, 1, 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 09:09:08,876 INFO L371 AbstractCegarLoop]: === Iteration 31 === [fooErr1RequiresViolation, fooErr0RequiresViolation, fooErr2RequiresViolation, fooErr3RequiresViolation, mainErr5RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr12EnsuresViolation]=== [2018-01-31 09:09:08,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1103723498, now seen corresponding path program 17 times [2018-01-31 09:09:08,876 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 09:09:08,877 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 09:09:08,877 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:08,877 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-31 09:09:08,877 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 09:09:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 09:09:08,903 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 09:09:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-01-31 09:09:09,837 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-31 09:09:09,837 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-31 09:09:09,842 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-31 09:09:09,856 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:09:09,857 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:09:09,859 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:09:09,861 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:09:09,865 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:09:09,871 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:09:09,878 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:09:09,899 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:09:09,926 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:09:09,966 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:09:10,084 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:09:10,219 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:09:11,026 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:09:12,615 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:09:14,011 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:09:25,503 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-31 09:09:35,833 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown