java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007_true-unreach-call_true-termination.c.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-23 23:40:17,096 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 23:40:17,098 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 23:40:17,115 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 23:40:17,115 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 23:40:17,116 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 23:40:17,117 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 23:40:17,119 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 23:40:17,121 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 23:40:17,122 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 23:40:17,122 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 23:40:17,123 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 23:40:17,124 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 23:40:17,125 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 23:40:17,126 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 23:40:17,127 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 23:40:17,127 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 23:40:17,129 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 23:40:17,131 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 23:40:17,133 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 23:40:17,134 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 23:40:17,135 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 23:40:17,137 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-23 23:40:17,137 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-23 23:40:17,138 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-23 23:40:17,139 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-23 23:40:17,140 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-23 23:40:17,140 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-23 23:40:17,141 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-23 23:40:17,142 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-23 23:40:17,143 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-23 23:40:17,143 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-23 23:40:17,143 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-23 23:40:17,144 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-23 23:40:17,145 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-23 23:40:17,145 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-23 23:40:17,146 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-07-23 23:40:17,164 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 23:40:17,164 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 23:40:17,165 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-23 23:40:17,165 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-07-23 23:40:17,166 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-07-23 23:40:17,166 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-07-23 23:40:17,166 INFO L133 SettingsManager]: * Use SBE=true [2018-07-23 23:40:17,166 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-23 23:40:17,167 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-23 23:40:17,167 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-23 23:40:17,167 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-23 23:40:17,167 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-23 23:40:17,167 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-23 23:40:17,167 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-23 23:40:17,168 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-23 23:40:17,168 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 23:40:17,168 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-23 23:40:17,168 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-23 23:40:17,168 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-23 23:40:17,169 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-23 23:40:17,169 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 23:40:17,169 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-23 23:40:17,169 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-23 23:40:17,169 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-07-23 23:40:17,170 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-23 23:40:17,170 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-23 23:40:17,170 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 23:40:17,170 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-23 23:40:17,212 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 23:40:17,224 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 23:40:17,228 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 23:40:17,230 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-23 23:40:17,230 INFO L276 PluginConnector]: CDTParser initialized [2018-07-23 23:40:17,231 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007_true-unreach-call_true-termination.c.i [2018-07-23 23:40:17,585 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a44b705e/b048c3eb7f7746fb8ed29e5fa8c51d10/FLAG1e1f3d098 [2018-07-23 23:40:17,758 INFO L276 CDTParser]: Found 1 translation units. [2018-07-23 23:40:17,758 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007_true-unreach-call_true-termination.c.i [2018-07-23 23:40:17,764 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a44b705e/b048c3eb7f7746fb8ed29e5fa8c51d10/FLAG1e1f3d098 [2018-07-23 23:40:17,779 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a44b705e/b048c3eb7f7746fb8ed29e5fa8c51d10 [2018-07-23 23:40:17,790 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 23:40:17,791 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-23 23:40:17,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-23 23:40:17,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-23 23:40:17,800 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-23 23:40:17,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 11:40:17" (1/1) ... [2018-07-23 23:40:17,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@632c0a8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:40:17, skipping insertion in model container [2018-07-23 23:40:17,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 11:40:17" (1/1) ... [2018-07-23 23:40:17,974 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-23 23:40:18,009 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 23:40:18,025 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-23 23:40:18,031 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 23:40:18,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:40:18 WrapperNode [2018-07-23 23:40:18,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-23 23:40:18,050 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-23 23:40:18,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-23 23:40:18,050 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-23 23:40:18,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:40:18" (1/1) ... [2018-07-23 23:40:18,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:40:18" (1/1) ... [2018-07-23 23:40:18,085 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-23 23:40:18,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 23:40:18,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 23:40:18,086 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 23:40:18,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:40:18" (1/1) ... [2018-07-23 23:40:18,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:40:18" (1/1) ... [2018-07-23 23:40:18,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:40:18" (1/1) ... [2018-07-23 23:40:18,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:40:18" (1/1) ... [2018-07-23 23:40:18,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:40:18" (1/1) ... [2018-07-23 23:40:18,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:40:18" (1/1) ... [2018-07-23 23:40:18,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:40:18" (1/1) ... [2018-07-23 23:40:18,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 23:40:18,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 23:40:18,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 23:40:18,114 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 23:40:18,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:40:18" (1/1) ... No working directory specified, using /storage/repos/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 [2018-07-23 23:40:18,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 23:40:18,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 23:40:18,593 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 23:40:18,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 11:40:18 BoogieIcfgContainer [2018-07-23 23:40:18,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 23:40:18,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 23:40:18,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 23:40:18,599 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 23:40:18,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 11:40:17" (1/3) ... [2018-07-23 23:40:18,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd2dd88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 11:40:18, skipping insertion in model container [2018-07-23 23:40:18,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 11:40:18" (2/3) ... [2018-07-23 23:40:18,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd2dd88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 11:40:18, skipping insertion in model container [2018-07-23 23:40:18,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 11:40:18" (3/3) ... [2018-07-23 23:40:18,611 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007_true-unreach-call_true-termination.c.i [2018-07-23 23:40:18,620 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-23 23:40:18,626 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 23:40:18,673 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 23:40:18,674 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 23:40:18,674 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 23:40:18,675 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-23 23:40:18,675 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 23:40:18,675 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 23:40:18,675 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 23:40:18,675 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 23:40:18,676 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 23:40:18,688 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-07-23 23:40:18,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 23:40:18,695 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:18,696 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-07-23 23:40:18,696 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:18,701 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2018-07-23 23:40:18,704 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:18,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:18,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:18,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:18,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:18,809 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:40:18,809 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-23 23:40:18,813 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-23 23:40:18,828 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-23 23:40:18,829 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-23 23:40:18,832 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-07-23 23:40:18,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:18,850 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-07-23 23:40:18,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-23 23:40:18,853 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-07-23 23:40:18,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:18,869 INFO L225 Difference]: With dead ends: 21 [2018-07-23 23:40:18,869 INFO L226 Difference]: Without dead ends: 9 [2018-07-23 23:40:18,873 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-23 23:40:18,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-07-23 23:40:18,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-07-23 23:40:18,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-23 23:40:18,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-07-23 23:40:18,914 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-07-23 23:40:18,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:18,915 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-07-23 23:40:18,915 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-23 23:40:18,915 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-07-23 23:40:18,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-07-23 23:40:18,916 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:18,916 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:18,916 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:18,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1805929617, now seen corresponding path program 1 times [2018-07-23 23:40:18,917 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:18,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:18,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:18,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:18,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:18,977 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:40:18,978 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 23:40:18,979 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 23:40:18,980 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 23:40:18,980 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:40:18,980 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-07-23 23:40:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:19,089 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2018-07-23 23:40:19,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 23:40:19,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-07-23 23:40:19,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:19,091 INFO L225 Difference]: With dead ends: 19 [2018-07-23 23:40:19,091 INFO L226 Difference]: Without dead ends: 12 [2018-07-23 23:40:19,092 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 23:40:19,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-23 23:40:19,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-07-23 23:40:19,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-07-23 23:40:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-07-23 23:40:19,107 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2018-07-23 23:40:19,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:19,108 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-07-23 23:40:19,108 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 23:40:19,108 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-07-23 23:40:19,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-23 23:40:19,109 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:19,109 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:19,109 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:19,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1049525042, now seen corresponding path program 1 times [2018-07-23 23:40:19,110 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:19,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:19,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:19,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:19,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:19,191 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:19,192 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:19,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:19,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:19,308 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-07-23 23:40:19,308 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-07-23 23:40:19,309 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 23:40:19,309 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 23:40:19,309 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 23:40:19,310 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2018-07-23 23:40:19,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:19,393 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-07-23 23:40:19,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 23:40:19,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-07-23 23:40:19,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:19,395 INFO L225 Difference]: With dead ends: 25 [2018-07-23 23:40:19,395 INFO L226 Difference]: Without dead ends: 18 [2018-07-23 23:40:19,396 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 23:40:19,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-23 23:40:19,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-07-23 23:40:19,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-23 23:40:19,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-07-23 23:40:19,400 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 10 [2018-07-23 23:40:19,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:19,401 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-07-23 23:40:19,401 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 23:40:19,401 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-07-23 23:40:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-23 23:40:19,402 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:19,402 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:19,402 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:19,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1721888980, now seen corresponding path program 1 times [2018-07-23 23:40:19,403 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:19,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:19,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:19,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:19,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:19,472 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:19,472 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:19,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:19,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:19,539 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:19,540 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-07-23 23:40:19,540 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 23:40:19,540 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 23:40:19,541 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 23:40:19,541 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2018-07-23 23:40:19,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:19,606 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-07-23 23:40:19,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 23:40:19,608 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-07-23 23:40:19,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:19,609 INFO L225 Difference]: With dead ends: 29 [2018-07-23 23:40:19,609 INFO L226 Difference]: Without dead ends: 20 [2018-07-23 23:40:19,610 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 23:40:19,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-07-23 23:40:19,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-07-23 23:40:19,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-23 23:40:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-07-23 23:40:19,614 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2018-07-23 23:40:19,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:19,615 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-07-23 23:40:19,615 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 23:40:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-07-23 23:40:19,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-23 23:40:19,616 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:19,616 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:19,616 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:19,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1066415217, now seen corresponding path program 2 times [2018-07-23 23:40:19,617 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:19,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:19,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:19,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:19,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:19,743 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:19,743 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:19,759 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:40:19,789 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:40:19,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:19,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:19,831 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:19,831 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-07-23 23:40:19,831 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 23:40:19,832 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 23:40:19,832 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 23:40:19,832 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2018-07-23 23:40:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:19,969 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-07-23 23:40:19,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 23:40:19,969 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-07-23 23:40:19,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:19,970 INFO L225 Difference]: With dead ends: 32 [2018-07-23 23:40:19,970 INFO L226 Difference]: Without dead ends: 23 [2018-07-23 23:40:19,971 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 23:40:19,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-07-23 23:40:19,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-07-23 23:40:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-07-23 23:40:19,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-07-23 23:40:19,975 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2018-07-23 23:40:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:19,976 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-07-23 23:40:19,976 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 23:40:19,976 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-07-23 23:40:19,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-23 23:40:19,977 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:19,977 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:19,977 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:19,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1231130700, now seen corresponding path program 3 times [2018-07-23 23:40:19,978 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:19,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:19,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:19,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:19,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:40:20,174 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:20,174 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:20,183 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:40:20,225 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-07-23 23:40:20,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:20,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-07-23 23:40:20,315 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:20,316 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2018-07-23 23:40:20,316 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 23:40:20,316 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 23:40:20,317 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 23:40:20,317 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2018-07-23 23:40:20,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:20,499 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2018-07-23 23:40:20,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 23:40:20,499 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-07-23 23:40:20,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:20,504 INFO L225 Difference]: With dead ends: 39 [2018-07-23 23:40:20,505 INFO L226 Difference]: Without dead ends: 30 [2018-07-23 23:40:20,505 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 23:40:20,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-07-23 23:40:20,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-07-23 23:40:20,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-07-23 23:40:20,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-07-23 23:40:20,514 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2018-07-23 23:40:20,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:20,517 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-07-23 23:40:20,517 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 23:40:20,517 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-07-23 23:40:20,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-23 23:40:20,518 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:20,518 INFO L353 BasicCegarLoop]: trace histogram [8, 7, 5, 2, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:20,518 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:20,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1951438702, now seen corresponding path program 4 times [2018-07-23 23:40:20,519 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:20,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:20,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:20,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:20,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-23 23:40:20,641 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:20,641 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:20,656 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:40:20,669 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:40:20,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:20,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-23 23:40:20,704 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:20,704 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-07-23 23:40:20,705 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 23:40:20,705 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 23:40:20,705 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 23:40:20,706 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 8 states. [2018-07-23 23:40:20,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:20,769 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2018-07-23 23:40:20,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 23:40:20,769 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2018-07-23 23:40:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:20,771 INFO L225 Difference]: With dead ends: 44 [2018-07-23 23:40:20,771 INFO L226 Difference]: Without dead ends: 32 [2018-07-23 23:40:20,772 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 23:40:20,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-07-23 23:40:20,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-07-23 23:40:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-07-23 23:40:20,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-07-23 23:40:20,777 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2018-07-23 23:40:20,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:20,777 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-07-23 23:40:20,777 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 23:40:20,778 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-07-23 23:40:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-23 23:40:20,779 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:20,779 INFO L353 BasicCegarLoop]: trace histogram [9, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:20,779 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:20,779 INFO L82 PathProgramCache]: Analyzing trace with hash -11282607, now seen corresponding path program 5 times [2018-07-23 23:40:20,779 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:20,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:20,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:20,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:20,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 35 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-23 23:40:21,178 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:21,179 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:21,191 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:40:21,214 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-07-23 23:40:21,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:21,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 35 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-23 23:40:21,246 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:21,246 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-07-23 23:40:21,246 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 23:40:21,247 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 23:40:21,247 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 23:40:21,247 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2018-07-23 23:40:21,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:21,308 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2018-07-23 23:40:21,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 23:40:21,309 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2018-07-23 23:40:21,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:21,310 INFO L225 Difference]: With dead ends: 47 [2018-07-23 23:40:21,310 INFO L226 Difference]: Without dead ends: 35 [2018-07-23 23:40:21,310 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 23:40:21,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-07-23 23:40:21,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-07-23 23:40:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-07-23 23:40:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-07-23 23:40:21,315 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2018-07-23 23:40:21,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:21,315 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-07-23 23:40:21,315 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 23:40:21,316 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-07-23 23:40:21,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-07-23 23:40:21,317 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:21,317 INFO L353 BasicCegarLoop]: trace histogram [10, 9, 7, 2, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:21,317 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:21,317 INFO L82 PathProgramCache]: Analyzing trace with hash 242968718, now seen corresponding path program 6 times [2018-07-23 23:40:21,317 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:21,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:21,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:21,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:21,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 40 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-23 23:40:21,534 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:21,534 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:21,550 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:40:21,591 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-07-23 23:40:21,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:21,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 56 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-07-23 23:40:21,683 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:21,683 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2018-07-23 23:40:21,684 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 23:40:21,684 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 23:40:21,684 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-23 23:40:21,684 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 13 states. [2018-07-23 23:40:21,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:21,794 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2018-07-23 23:40:21,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-23 23:40:21,795 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2018-07-23 23:40:21,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:21,796 INFO L225 Difference]: With dead ends: 54 [2018-07-23 23:40:21,796 INFO L226 Difference]: Without dead ends: 42 [2018-07-23 23:40:21,797 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-23 23:40:21,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-07-23 23:40:21,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-07-23 23:40:21,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-07-23 23:40:21,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-07-23 23:40:21,803 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2018-07-23 23:40:21,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:21,803 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-07-23 23:40:21,804 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 23:40:21,804 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-07-23 23:40:21,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-23 23:40:21,805 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:21,805 INFO L353 BasicCegarLoop]: trace histogram [12, 11, 8, 3, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:21,805 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:21,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2085606292, now seen corresponding path program 7 times [2018-07-23 23:40:21,806 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:21,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:21,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:21,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:21,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 72 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-23 23:40:21,986 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:21,987 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:21,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:22,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 72 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-23 23:40:22,052 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:22,052 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-07-23 23:40:22,053 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 23:40:22,053 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 23:40:22,053 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 23:40:22,054 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 11 states. [2018-07-23 23:40:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:22,392 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-07-23 23:40:22,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 23:40:22,393 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2018-07-23 23:40:22,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:22,394 INFO L225 Difference]: With dead ends: 59 [2018-07-23 23:40:22,394 INFO L226 Difference]: Without dead ends: 44 [2018-07-23 23:40:22,395 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 23:40:22,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-07-23 23:40:22,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-07-23 23:40:22,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-23 23:40:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2018-07-23 23:40:22,403 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 40 [2018-07-23 23:40:22,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:22,404 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2018-07-23 23:40:22,404 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 23:40:22,404 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2018-07-23 23:40:22,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-07-23 23:40:22,406 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:22,406 INFO L353 BasicCegarLoop]: trace histogram [13, 12, 9, 3, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:22,408 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:22,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1593552847, now seen corresponding path program 8 times [2018-07-23 23:40:22,409 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:22,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:22,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:22,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:22,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 80 proven. 135 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-23 23:40:22,639 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:22,639 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:22,647 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:40:22,663 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:40:22,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:22,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 80 proven. 135 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-23 23:40:22,705 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:22,705 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-07-23 23:40:22,706 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 23:40:22,706 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 23:40:22,706 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 23:40:22,706 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 12 states. [2018-07-23 23:40:22,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:22,807 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2018-07-23 23:40:22,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 23:40:22,809 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2018-07-23 23:40:22,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:22,810 INFO L225 Difference]: With dead ends: 62 [2018-07-23 23:40:22,810 INFO L226 Difference]: Without dead ends: 47 [2018-07-23 23:40:22,811 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 23:40:22,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-07-23 23:40:22,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-07-23 23:40:22,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-07-23 23:40:22,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2018-07-23 23:40:22,816 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 43 [2018-07-23 23:40:22,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:22,817 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2018-07-23 23:40:22,817 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 23:40:22,817 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2018-07-23 23:40:22,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-07-23 23:40:22,818 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:22,818 INFO L353 BasicCegarLoop]: trace histogram [14, 13, 10, 3, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:22,818 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:22,818 INFO L82 PathProgramCache]: Analyzing trace with hash -141931124, now seen corresponding path program 9 times [2018-07-23 23:40:22,819 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:22,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:22,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:22,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:22,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 88 proven. 165 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-23 23:40:23,004 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:23,005 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:23,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:40:23,036 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-07-23 23:40:23,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:23,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 110 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2018-07-23 23:40:23,164 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:23,164 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2018-07-23 23:40:23,165 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 23:40:23,165 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 23:40:23,165 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 23:40:23,165 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 17 states. [2018-07-23 23:40:23,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:23,261 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2018-07-23 23:40:23,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-23 23:40:23,262 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2018-07-23 23:40:23,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:23,263 INFO L225 Difference]: With dead ends: 69 [2018-07-23 23:40:23,263 INFO L226 Difference]: Without dead ends: 54 [2018-07-23 23:40:23,266 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 23:40:23,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-07-23 23:40:23,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-07-23 23:40:23,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-23 23:40:23,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2018-07-23 23:40:23,272 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 46 [2018-07-23 23:40:23,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:23,272 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2018-07-23 23:40:23,272 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 23:40:23,272 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2018-07-23 23:40:23,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-23 23:40:23,273 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:23,273 INFO L353 BasicCegarLoop]: trace histogram [16, 15, 11, 4, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:23,274 INFO L414 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:23,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1643779282, now seen corresponding path program 10 times [2018-07-23 23:40:23,274 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:23,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:23,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:23,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:23,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 132 proven. 198 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-07-23 23:40:23,471 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:23,471 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:23,479 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:40:23,495 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:40:23,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:23,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 132 proven. 198 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-07-23 23:40:23,532 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:23,532 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-07-23 23:40:23,532 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 23:40:23,533 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 23:40:23,533 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-23 23:40:23,533 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 14 states. [2018-07-23 23:40:23,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:23,601 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2018-07-23 23:40:23,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 23:40:23,601 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2018-07-23 23:40:23,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:23,603 INFO L225 Difference]: With dead ends: 74 [2018-07-23 23:40:23,603 INFO L226 Difference]: Without dead ends: 56 [2018-07-23 23:40:23,604 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-23 23:40:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-07-23 23:40:23,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-07-23 23:40:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-07-23 23:40:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2018-07-23 23:40:23,610 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 52 [2018-07-23 23:40:23,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:23,610 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2018-07-23 23:40:23,610 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 23:40:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2018-07-23 23:40:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-07-23 23:40:23,611 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:23,611 INFO L353 BasicCegarLoop]: trace histogram [17, 16, 12, 4, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:23,612 INFO L414 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:23,612 INFO L82 PathProgramCache]: Analyzing trace with hash 701526545, now seen corresponding path program 11 times [2018-07-23 23:40:23,612 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:23,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:23,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:23,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:23,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 143 proven. 234 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-07-23 23:40:23,805 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:23,805 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:23,813 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:40:23,839 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-07-23 23:40:23,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:23,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 143 proven. 234 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-07-23 23:40:23,880 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:23,880 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-07-23 23:40:23,880 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 23:40:23,881 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 23:40:23,881 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-23 23:40:23,881 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 15 states. [2018-07-23 23:40:23,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:23,980 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2018-07-23 23:40:23,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-23 23:40:23,980 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2018-07-23 23:40:23,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:23,981 INFO L225 Difference]: With dead ends: 77 [2018-07-23 23:40:23,981 INFO L226 Difference]: Without dead ends: 59 [2018-07-23 23:40:23,982 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-23 23:40:23,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-07-23 23:40:23,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-07-23 23:40:23,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-07-23 23:40:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2018-07-23 23:40:23,988 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 55 [2018-07-23 23:40:23,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:23,988 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2018-07-23 23:40:23,989 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 23:40:23,989 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2018-07-23 23:40:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-07-23 23:40:23,990 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:23,990 INFO L353 BasicCegarLoop]: trace histogram [18, 17, 13, 4, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:23,990 INFO L414 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:23,990 INFO L82 PathProgramCache]: Analyzing trace with hash -820552626, now seen corresponding path program 12 times [2018-07-23 23:40:23,990 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:23,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:23,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:23,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:23,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 154 proven. 273 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-07-23 23:40:24,409 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:24,409 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:24,416 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:40:24,444 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-07-23 23:40:24,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:24,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 182 proven. 26 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-07-23 23:40:24,618 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:24,618 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7] total 21 [2018-07-23 23:40:24,619 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 23:40:24,619 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 23:40:24,619 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 23:40:24,620 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 21 states. [2018-07-23 23:40:24,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:24,737 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2018-07-23 23:40:24,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-23 23:40:24,738 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2018-07-23 23:40:24,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:24,739 INFO L225 Difference]: With dead ends: 84 [2018-07-23 23:40:24,739 INFO L226 Difference]: Without dead ends: 66 [2018-07-23 23:40:24,740 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 23:40:24,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-07-23 23:40:24,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-07-23 23:40:24,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-07-23 23:40:24,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2018-07-23 23:40:24,748 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 58 [2018-07-23 23:40:24,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:24,748 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2018-07-23 23:40:24,748 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 23:40:24,748 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2018-07-23 23:40:24,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-07-23 23:40:24,749 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:24,749 INFO L353 BasicCegarLoop]: trace histogram [20, 19, 14, 5, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:24,750 INFO L414 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:24,750 INFO L82 PathProgramCache]: Analyzing trace with hash -176473684, now seen corresponding path program 13 times [2018-07-23 23:40:24,750 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:24,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:24,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:24,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:24,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 210 proven. 315 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-07-23 23:40:25,184 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:25,184 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:25,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:25,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 210 proven. 315 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-07-23 23:40:25,262 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:25,263 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-07-23 23:40:25,263 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 23:40:25,263 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 23:40:25,264 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 23:40:25,264 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 17 states. [2018-07-23 23:40:25,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:25,377 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2018-07-23 23:40:25,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-23 23:40:25,379 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2018-07-23 23:40:25,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:25,380 INFO L225 Difference]: With dead ends: 89 [2018-07-23 23:40:25,380 INFO L226 Difference]: Without dead ends: 68 [2018-07-23 23:40:25,381 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 23:40:25,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-07-23 23:40:25,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-07-23 23:40:25,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-07-23 23:40:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2018-07-23 23:40:25,387 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 64 [2018-07-23 23:40:25,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:25,387 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2018-07-23 23:40:25,388 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 23:40:25,388 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2018-07-23 23:40:25,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-07-23 23:40:25,389 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:25,389 INFO L353 BasicCegarLoop]: trace histogram [21, 20, 15, 5, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:25,389 INFO L414 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:25,389 INFO L82 PathProgramCache]: Analyzing trace with hash 903578639, now seen corresponding path program 14 times [2018-07-23 23:40:25,390 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:25,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:25,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:25,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:25,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 224 proven. 360 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-07-23 23:40:25,642 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:25,642 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:25,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:40:25,675 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:40:25,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:25,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 224 proven. 360 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-07-23 23:40:25,723 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:25,723 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-07-23 23:40:25,723 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 23:40:25,724 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 23:40:25,724 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-23 23:40:25,724 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 18 states. [2018-07-23 23:40:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:25,800 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2018-07-23 23:40:25,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 23:40:25,800 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2018-07-23 23:40:25,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:25,802 INFO L225 Difference]: With dead ends: 92 [2018-07-23 23:40:25,802 INFO L226 Difference]: Without dead ends: 71 [2018-07-23 23:40:25,803 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-23 23:40:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-07-23 23:40:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-07-23 23:40:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-07-23 23:40:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2018-07-23 23:40:25,810 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 67 [2018-07-23 23:40:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:25,810 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2018-07-23 23:40:25,810 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 23:40:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2018-07-23 23:40:25,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-07-23 23:40:25,811 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:25,812 INFO L353 BasicCegarLoop]: trace histogram [22, 21, 16, 5, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:25,812 INFO L414 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:25,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1152648500, now seen corresponding path program 15 times [2018-07-23 23:40:25,812 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:25,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:25,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:25,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:25,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 238 proven. 408 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-07-23 23:40:26,062 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:26,062 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:26,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:40:26,083 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-07-23 23:40:26,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:26,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 272 proven. 40 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2018-07-23 23:40:26,518 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:26,518 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2018-07-23 23:40:26,518 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 23:40:26,518 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 23:40:26,519 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-23 23:40:26,519 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 25 states. [2018-07-23 23:40:26,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:26,746 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2018-07-23 23:40:26,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-23 23:40:26,746 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 70 [2018-07-23 23:40:26,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:26,747 INFO L225 Difference]: With dead ends: 99 [2018-07-23 23:40:26,747 INFO L226 Difference]: Without dead ends: 78 [2018-07-23 23:40:26,748 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-23 23:40:26,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-07-23 23:40:26,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-07-23 23:40:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-07-23 23:40:26,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2018-07-23 23:40:26,754 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 70 [2018-07-23 23:40:26,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:26,754 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2018-07-23 23:40:26,754 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 23:40:26,755 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2018-07-23 23:40:26,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-07-23 23:40:26,755 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:26,755 INFO L353 BasicCegarLoop]: trace histogram [24, 23, 17, 6, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:26,756 INFO L414 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:26,756 INFO L82 PathProgramCache]: Analyzing trace with hash 767643374, now seen corresponding path program 16 times [2018-07-23 23:40:26,756 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:26,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:26,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:26,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:26,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 306 proven. 459 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-07-23 23:40:27,038 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:27,038 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:27,047 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:40:27,074 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:40:27,075 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:27,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 306 proven. 459 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-07-23 23:40:27,115 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:27,115 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-07-23 23:40:27,115 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 23:40:27,115 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 23:40:27,116 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-23 23:40:27,116 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand 20 states. [2018-07-23 23:40:27,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:27,257 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2018-07-23 23:40:27,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 23:40:27,257 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 76 [2018-07-23 23:40:27,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:27,258 INFO L225 Difference]: With dead ends: 104 [2018-07-23 23:40:27,259 INFO L226 Difference]: Without dead ends: 80 [2018-07-23 23:40:27,260 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-23 23:40:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-07-23 23:40:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-07-23 23:40:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-07-23 23:40:27,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2018-07-23 23:40:27,266 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 76 [2018-07-23 23:40:27,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:27,266 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2018-07-23 23:40:27,266 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 23:40:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2018-07-23 23:40:27,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-07-23 23:40:27,267 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:27,268 INFO L353 BasicCegarLoop]: trace histogram [25, 24, 18, 6, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:27,268 INFO L414 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:27,268 INFO L82 PathProgramCache]: Analyzing trace with hash -89252655, now seen corresponding path program 17 times [2018-07-23 23:40:27,268 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:27,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:27,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:27,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:27,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 323 proven. 513 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-07-23 23:40:27,575 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:27,575 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:27,584 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:40:27,617 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-07-23 23:40:27,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:27,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 323 proven. 513 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-07-23 23:40:27,667 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:27,668 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-07-23 23:40:27,668 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 23:40:27,668 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 23:40:27,669 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 23:40:27,669 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 21 states. [2018-07-23 23:40:27,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:27,880 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2018-07-23 23:40:27,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-23 23:40:27,881 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 79 [2018-07-23 23:40:27,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:27,882 INFO L225 Difference]: With dead ends: 107 [2018-07-23 23:40:27,882 INFO L226 Difference]: Without dead ends: 83 [2018-07-23 23:40:27,883 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 23:40:27,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-07-23 23:40:27,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-07-23 23:40:27,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-07-23 23:40:27,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2018-07-23 23:40:27,887 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 79 [2018-07-23 23:40:27,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:27,888 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2018-07-23 23:40:27,888 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 23:40:27,888 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2018-07-23 23:40:27,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-07-23 23:40:27,889 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:27,889 INFO L353 BasicCegarLoop]: trace histogram [26, 25, 19, 6, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:27,889 INFO L414 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:27,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1406754830, now seen corresponding path program 18 times [2018-07-23 23:40:27,890 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:27,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:27,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:27,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:27,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 340 proven. 570 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-07-23 23:40:28,707 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:28,707 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:28,716 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:40:28,788 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-07-23 23:40:28,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:28,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 380 proven. 57 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2018-07-23 23:40:28,974 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:28,975 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2018-07-23 23:40:28,975 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 23:40:28,975 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 23:40:28,976 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 23:40:28,976 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 29 states. [2018-07-23 23:40:29,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:29,182 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2018-07-23 23:40:29,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 23:40:29,183 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 82 [2018-07-23 23:40:29,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:29,184 INFO L225 Difference]: With dead ends: 114 [2018-07-23 23:40:29,184 INFO L226 Difference]: Without dead ends: 90 [2018-07-23 23:40:29,185 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 23:40:29,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-07-23 23:40:29,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-07-23 23:40:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 23:40:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2018-07-23 23:40:29,189 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 82 [2018-07-23 23:40:29,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:29,190 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2018-07-23 23:40:29,190 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 23:40:29,190 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2018-07-23 23:40:29,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-07-23 23:40:29,191 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:29,191 INFO L353 BasicCegarLoop]: trace histogram [28, 27, 20, 7, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:29,192 INFO L414 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:29,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1722496748, now seen corresponding path program 19 times [2018-07-23 23:40:29,192 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:29,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:29,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:29,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:29,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 420 proven. 630 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-07-23 23:40:29,623 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:29,623 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:29,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:29,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 420 proven. 630 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-07-23 23:40:29,703 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:29,703 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-07-23 23:40:29,703 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 23:40:29,703 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 23:40:29,704 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-23 23:40:29,704 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand 23 states. [2018-07-23 23:40:29,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:29,813 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2018-07-23 23:40:29,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-23 23:40:29,816 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 88 [2018-07-23 23:40:29,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:29,817 INFO L225 Difference]: With dead ends: 119 [2018-07-23 23:40:29,817 INFO L226 Difference]: Without dead ends: 92 [2018-07-23 23:40:29,818 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-23 23:40:29,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-07-23 23:40:29,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-07-23 23:40:29,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-07-23 23:40:29,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2018-07-23 23:40:29,821 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 88 [2018-07-23 23:40:29,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:29,821 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2018-07-23 23:40:29,822 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 23:40:29,822 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2018-07-23 23:40:29,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-07-23 23:40:29,822 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:29,823 INFO L353 BasicCegarLoop]: trace histogram [29, 28, 21, 7, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:29,823 INFO L414 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:29,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1678030769, now seen corresponding path program 20 times [2018-07-23 23:40:29,823 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:29,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:29,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:29,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:29,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 440 proven. 693 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-07-23 23:40:30,190 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:30,190 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:30,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:40:30,220 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:40:30,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:30,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 440 proven. 693 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-07-23 23:40:30,262 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:30,263 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-07-23 23:40:30,263 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 23:40:30,263 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 23:40:30,263 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-23 23:40:30,264 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 24 states. [2018-07-23 23:40:30,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:30,451 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2018-07-23 23:40:30,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 23:40:30,452 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 91 [2018-07-23 23:40:30,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:30,453 INFO L225 Difference]: With dead ends: 122 [2018-07-23 23:40:30,453 INFO L226 Difference]: Without dead ends: 95 [2018-07-23 23:40:30,454 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-23 23:40:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-07-23 23:40:30,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-07-23 23:40:30,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-07-23 23:40:30,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2018-07-23 23:40:30,458 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 91 [2018-07-23 23:40:30,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:30,458 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2018-07-23 23:40:30,458 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 23:40:30,459 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2018-07-23 23:40:30,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-07-23 23:40:30,459 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:30,459 INFO L353 BasicCegarLoop]: trace histogram [30, 29, 22, 7, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:30,460 INFO L414 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:30,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1399678964, now seen corresponding path program 21 times [2018-07-23 23:40:30,460 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:30,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:30,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:30,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:30,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 460 proven. 759 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-07-23 23:40:30,850 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:30,850 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:30,857 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:40:30,878 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-07-23 23:40:30,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:30,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 506 proven. 77 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2018-07-23 23:40:31,596 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:31,596 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10] total 33 [2018-07-23 23:40:31,596 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 23:40:31,597 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 23:40:31,597 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 23:40:31,597 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 33 states. [2018-07-23 23:40:31,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:31,786 INFO L93 Difference]: Finished difference Result 129 states and 147 transitions. [2018-07-23 23:40:31,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-23 23:40:31,787 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 94 [2018-07-23 23:40:31,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:31,788 INFO L225 Difference]: With dead ends: 129 [2018-07-23 23:40:31,788 INFO L226 Difference]: Without dead ends: 102 [2018-07-23 23:40:31,790 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 23:40:31,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-07-23 23:40:31,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2018-07-23 23:40:31,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-07-23 23:40:31,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2018-07-23 23:40:31,797 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 94 [2018-07-23 23:40:31,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:31,797 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2018-07-23 23:40:31,797 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 23:40:31,797 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2018-07-23 23:40:31,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-07-23 23:40:31,798 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:31,798 INFO L353 BasicCegarLoop]: trace histogram [32, 31, 23, 8, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:31,798 INFO L414 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:31,798 INFO L82 PathProgramCache]: Analyzing trace with hash -183057746, now seen corresponding path program 22 times [2018-07-23 23:40:31,799 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:31,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:31,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:31,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:31,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 552 proven. 828 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-07-23 23:40:32,501 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:32,502 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:32,509 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:40:32,535 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:40:32,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:32,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 552 proven. 828 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-07-23 23:40:32,585 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:32,585 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-07-23 23:40:32,585 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 23:40:32,586 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 23:40:32,586 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-23 23:40:32,586 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 26 states. [2018-07-23 23:40:32,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:32,797 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2018-07-23 23:40:32,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 23:40:32,798 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 100 [2018-07-23 23:40:32,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:32,799 INFO L225 Difference]: With dead ends: 134 [2018-07-23 23:40:32,799 INFO L226 Difference]: Without dead ends: 104 [2018-07-23 23:40:32,799 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-23 23:40:32,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-07-23 23:40:32,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-07-23 23:40:32,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-07-23 23:40:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2018-07-23 23:40:32,803 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 100 [2018-07-23 23:40:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:32,803 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2018-07-23 23:40:32,803 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 23:40:32,803 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2018-07-23 23:40:32,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-07-23 23:40:32,804 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:32,804 INFO L353 BasicCegarLoop]: trace histogram [33, 32, 24, 8, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:32,804 INFO L414 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:32,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1568614511, now seen corresponding path program 23 times [2018-07-23 23:40:32,804 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:32,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:32,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:32,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:32,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 575 proven. 900 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-07-23 23:40:33,985 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:33,985 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:33,994 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:40:34,039 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2018-07-23 23:40:34,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:34,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 575 proven. 900 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-07-23 23:40:34,084 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:34,084 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-07-23 23:40:34,084 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 23:40:34,085 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 23:40:34,085 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-23 23:40:34,085 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 27 states. [2018-07-23 23:40:34,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:34,210 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2018-07-23 23:40:34,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-23 23:40:34,211 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 103 [2018-07-23 23:40:34,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:34,212 INFO L225 Difference]: With dead ends: 137 [2018-07-23 23:40:34,212 INFO L226 Difference]: Without dead ends: 107 [2018-07-23 23:40:34,212 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-23 23:40:34,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-07-23 23:40:34,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-07-23 23:40:34,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 23:40:34,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2018-07-23 23:40:34,215 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 103 [2018-07-23 23:40:34,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:34,216 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2018-07-23 23:40:34,216 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 23:40:34,216 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2018-07-23 23:40:34,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-07-23 23:40:34,216 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:34,216 INFO L353 BasicCegarLoop]: trace histogram [34, 33, 25, 8, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:34,216 INFO L414 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:34,217 INFO L82 PathProgramCache]: Analyzing trace with hash 240481230, now seen corresponding path program 24 times [2018-07-23 23:40:34,217 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:34,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:34,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:34,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:34,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 598 proven. 975 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-07-23 23:40:34,627 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:34,627 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:34,638 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:40:34,679 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-07-23 23:40:34,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:34,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 650 proven. 100 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2018-07-23 23:40:34,949 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:34,949 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11] total 37 [2018-07-23 23:40:34,949 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 23:40:34,949 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 23:40:34,950 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 23:40:34,950 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand 37 states. [2018-07-23 23:40:35,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:35,107 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2018-07-23 23:40:35,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-23 23:40:35,107 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 106 [2018-07-23 23:40:35,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:35,109 INFO L225 Difference]: With dead ends: 144 [2018-07-23 23:40:35,109 INFO L226 Difference]: Without dead ends: 114 [2018-07-23 23:40:35,110 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 23:40:35,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-07-23 23:40:35,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-07-23 23:40:35,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-07-23 23:40:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2018-07-23 23:40:35,114 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 106 [2018-07-23 23:40:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:35,114 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2018-07-23 23:40:35,114 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 23:40:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2018-07-23 23:40:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-07-23 23:40:35,115 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:35,115 INFO L353 BasicCegarLoop]: trace histogram [36, 35, 26, 9, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:35,115 INFO L414 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:35,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1909709780, now seen corresponding path program 25 times [2018-07-23 23:40:35,116 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:35,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:35,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:35,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:35,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 702 proven. 1053 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-07-23 23:40:35,779 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:35,779 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:35,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:35,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 702 proven. 1053 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-07-23 23:40:35,855 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:35,856 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-07-23 23:40:35,856 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 23:40:35,856 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 23:40:35,857 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 23:40:35,857 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 29 states. [2018-07-23 23:40:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:36,016 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2018-07-23 23:40:36,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 23:40:36,017 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 112 [2018-07-23 23:40:36,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:36,018 INFO L225 Difference]: With dead ends: 149 [2018-07-23 23:40:36,018 INFO L226 Difference]: Without dead ends: 116 [2018-07-23 23:40:36,019 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 23:40:36,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-07-23 23:40:36,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-07-23 23:40:36,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 23:40:36,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2018-07-23 23:40:36,023 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 112 [2018-07-23 23:40:36,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:36,023 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2018-07-23 23:40:36,024 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 23:40:36,024 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2018-07-23 23:40:36,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-07-23 23:40:36,024 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:36,024 INFO L353 BasicCegarLoop]: trace histogram [37, 36, 27, 9, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:36,025 INFO L414 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:36,025 INFO L82 PathProgramCache]: Analyzing trace with hash 658963599, now seen corresponding path program 26 times [2018-07-23 23:40:36,025 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:36,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:36,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:36,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:36,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 728 proven. 1134 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-07-23 23:40:36,831 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:36,831 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/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 [2018-07-23 23:40:36,840 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:40:36,868 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:40:36,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:36,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 728 proven. 1134 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-07-23 23:40:36,915 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:36,916 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-07-23 23:40:36,916 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 23:40:36,916 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 23:40:36,916 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-23 23:40:36,917 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand 30 states. [2018-07-23 23:40:37,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:37,081 INFO L93 Difference]: Finished difference Result 152 states and 171 transitions. [2018-07-23 23:40:37,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 23:40:37,082 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 115 [2018-07-23 23:40:37,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:37,083 INFO L225 Difference]: With dead ends: 152 [2018-07-23 23:40:37,083 INFO L226 Difference]: Without dead ends: 119 [2018-07-23 23:40:37,084 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-23 23:40:37,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-07-23 23:40:37,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-07-23 23:40:37,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-07-23 23:40:37,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 128 transitions. [2018-07-23 23:40:37,089 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 128 transitions. Word has length 115 [2018-07-23 23:40:37,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:37,089 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 128 transitions. [2018-07-23 23:40:37,090 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 23:40:37,090 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 128 transitions. [2018-07-23 23:40:37,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-07-23 23:40:37,090 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:37,090 INFO L353 BasicCegarLoop]: trace histogram [38, 37, 28, 9, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:37,091 INFO L414 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:37,091 INFO L82 PathProgramCache]: Analyzing trace with hash 575284556, now seen corresponding path program 27 times [2018-07-23 23:40:37,091 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:37,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:37,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:37,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:37,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 754 proven. 1218 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-07-23 23:40:37,560 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:37,560 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:40:37,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:40:37,593 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-07-23 23:40:37,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:37,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 812 proven. 126 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2018-07-23 23:40:38,033 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:38,034 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2018-07-23 23:40:38,034 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 23:40:38,034 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 23:40:38,035 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 23:40:38,035 INFO L87 Difference]: Start difference. First operand 119 states and 128 transitions. Second operand 41 states. [2018-07-23 23:40:38,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:38,264 INFO L93 Difference]: Finished difference Result 159 states and 181 transitions. [2018-07-23 23:40:38,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-23 23:40:38,264 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 118 [2018-07-23 23:40:38,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:38,266 INFO L225 Difference]: With dead ends: 159 [2018-07-23 23:40:38,266 INFO L226 Difference]: Without dead ends: 126 [2018-07-23 23:40:38,267 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 23:40:38,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-07-23 23:40:38,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2018-07-23 23:40:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-07-23 23:40:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2018-07-23 23:40:38,271 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 118 [2018-07-23 23:40:38,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:38,271 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2018-07-23 23:40:38,271 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 23:40:38,272 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2018-07-23 23:40:38,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-07-23 23:40:38,272 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:38,272 INFO L353 BasicCegarLoop]: trace histogram [40, 39, 29, 10, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:38,272 INFO L414 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:38,273 INFO L82 PathProgramCache]: Analyzing trace with hash 647644782, now seen corresponding path program 28 times [2018-07-23 23:40:38,273 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:38,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:38,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:38,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:38,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 870 proven. 1305 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-07-23 23:40:38,707 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:38,707 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:40:38,714 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:40:38,742 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:40:38,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:38,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 870 proven. 1305 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-07-23 23:40:38,788 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:38,788 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-07-23 23:40:38,789 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 23:40:38,789 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 23:40:38,789 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-23 23:40:38,789 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand 32 states. [2018-07-23 23:40:38,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:38,922 INFO L93 Difference]: Finished difference Result 164 states and 185 transitions. [2018-07-23 23:40:38,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 23:40:38,922 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 124 [2018-07-23 23:40:38,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:38,924 INFO L225 Difference]: With dead ends: 164 [2018-07-23 23:40:38,924 INFO L226 Difference]: Without dead ends: 128 [2018-07-23 23:40:38,925 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-23 23:40:38,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-07-23 23:40:38,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-07-23 23:40:38,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-07-23 23:40:38,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2018-07-23 23:40:38,929 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 124 [2018-07-23 23:40:38,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:38,929 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2018-07-23 23:40:38,929 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 23:40:38,929 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2018-07-23 23:40:38,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-07-23 23:40:38,930 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:38,930 INFO L353 BasicCegarLoop]: trace histogram [41, 40, 30, 10, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:38,930 INFO L414 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:38,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1294163375, now seen corresponding path program 29 times [2018-07-23 23:40:38,930 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:38,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:38,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:38,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:38,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 899 proven. 1395 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-07-23 23:40:39,456 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:39,456 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:40:39,464 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:40:39,521 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2018-07-23 23:40:39,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:39,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 899 proven. 1395 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-07-23 23:40:39,566 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:39,566 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-07-23 23:40:39,567 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 23:40:39,567 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 23:40:39,567 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 23:40:39,568 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand 33 states. [2018-07-23 23:40:39,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:39,701 INFO L93 Difference]: Finished difference Result 167 states and 188 transitions. [2018-07-23 23:40:39,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-23 23:40:39,702 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 127 [2018-07-23 23:40:39,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:39,703 INFO L225 Difference]: With dead ends: 167 [2018-07-23 23:40:39,703 INFO L226 Difference]: Without dead ends: 131 [2018-07-23 23:40:39,704 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 23:40:39,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-07-23 23:40:39,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-07-23 23:40:39,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-07-23 23:40:39,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2018-07-23 23:40:39,708 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 127 [2018-07-23 23:40:39,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:39,708 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2018-07-23 23:40:39,708 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 23:40:39,708 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2018-07-23 23:40:39,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-07-23 23:40:39,709 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:39,709 INFO L353 BasicCegarLoop]: trace histogram [42, 41, 31, 10, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:39,709 INFO L414 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:39,709 INFO L82 PathProgramCache]: Analyzing trace with hash -786458738, now seen corresponding path program 30 times [2018-07-23 23:40:39,709 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:39,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:39,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:39,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:39,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 928 proven. 1488 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-07-23 23:40:40,181 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:40,181 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:40:40,190 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:40:40,241 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2018-07-23 23:40:40,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:40,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 992 proven. 155 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-07-23 23:40:40,621 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:40,621 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 13] total 45 [2018-07-23 23:40:40,621 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 23:40:40,622 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 23:40:40,622 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 23:40:40,622 INFO L87 Difference]: Start difference. First operand 131 states and 141 transitions. Second operand 45 states. [2018-07-23 23:40:40,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:40,855 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2018-07-23 23:40:40,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-23 23:40:40,855 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 130 [2018-07-23 23:40:40,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:40,856 INFO L225 Difference]: With dead ends: 174 [2018-07-23 23:40:40,857 INFO L226 Difference]: Without dead ends: 138 [2018-07-23 23:40:40,858 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 23:40:40,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-07-23 23:40:40,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-07-23 23:40:40,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-07-23 23:40:40,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2018-07-23 23:40:40,863 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 130 [2018-07-23 23:40:40,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:40,863 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2018-07-23 23:40:40,863 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 23:40:40,863 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2018-07-23 23:40:40,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-07-23 23:40:40,864 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:40,864 INFO L353 BasicCegarLoop]: trace histogram [44, 43, 32, 11, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:40,864 INFO L414 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:40,865 INFO L82 PathProgramCache]: Analyzing trace with hash 568983916, now seen corresponding path program 31 times [2018-07-23 23:40:40,865 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:40,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:40,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:40,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:40,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 1056 proven. 1584 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-07-23 23:40:41,439 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:41,439 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:40:41,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:41,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 1056 proven. 1584 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-07-23 23:40:41,529 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:41,529 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-07-23 23:40:41,530 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 23:40:41,530 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 23:40:41,530 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 23:40:41,531 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 35 states. [2018-07-23 23:40:41,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:41,965 INFO L93 Difference]: Finished difference Result 179 states and 202 transitions. [2018-07-23 23:40:41,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 23:40:41,965 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 136 [2018-07-23 23:40:41,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:41,966 INFO L225 Difference]: With dead ends: 179 [2018-07-23 23:40:41,966 INFO L226 Difference]: Without dead ends: 140 [2018-07-23 23:40:41,967 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 23:40:41,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-07-23 23:40:41,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-07-23 23:40:41,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-07-23 23:40:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 151 transitions. [2018-07-23 23:40:41,972 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 151 transitions. Word has length 136 [2018-07-23 23:40:41,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:41,972 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 151 transitions. [2018-07-23 23:40:41,972 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 23:40:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 151 transitions. [2018-07-23 23:40:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-07-23 23:40:41,973 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:41,973 INFO L353 BasicCegarLoop]: trace histogram [45, 44, 33, 11, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:41,974 INFO L414 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:41,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1823121615, now seen corresponding path program 32 times [2018-07-23 23:40:41,974 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:41,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:41,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:41,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:41,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 1088 proven. 1683 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-07-23 23:40:43,112 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:43,112 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:40:43,119 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:40:43,153 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:40:43,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:43,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 1088 proven. 1683 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-07-23 23:40:43,199 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:43,199 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-07-23 23:40:43,199 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 23:40:43,199 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 23:40:43,200 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 23:40:43,200 INFO L87 Difference]: Start difference. First operand 140 states and 151 transitions. Second operand 36 states. [2018-07-23 23:40:43,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:43,374 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2018-07-23 23:40:43,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 23:40:43,375 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 139 [2018-07-23 23:40:43,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:43,376 INFO L225 Difference]: With dead ends: 182 [2018-07-23 23:40:43,376 INFO L226 Difference]: Without dead ends: 143 [2018-07-23 23:40:43,377 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 23:40:43,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-07-23 23:40:43,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-07-23 23:40:43,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-07-23 23:40:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 154 transitions. [2018-07-23 23:40:43,382 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 154 transitions. Word has length 139 [2018-07-23 23:40:43,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:43,382 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 154 transitions. [2018-07-23 23:40:43,383 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 23:40:43,383 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 154 transitions. [2018-07-23 23:40:43,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-07-23 23:40:43,383 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:43,383 INFO L353 BasicCegarLoop]: trace histogram [46, 45, 34, 11, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:43,383 INFO L414 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:43,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1918804620, now seen corresponding path program 33 times [2018-07-23 23:40:43,384 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:43,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:43,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:43,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:43,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 1120 proven. 1785 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-07-23 23:40:43,995 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:43,995 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:40:44,002 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:40:44,030 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-07-23 23:40:44,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:44,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 1190 proven. 187 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2018-07-23 23:40:44,454 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:44,454 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14] total 49 [2018-07-23 23:40:44,454 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-23 23:40:44,455 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-23 23:40:44,455 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 23:40:44,455 INFO L87 Difference]: Start difference. First operand 143 states and 154 transitions. Second operand 49 states. [2018-07-23 23:40:44,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:44,952 INFO L93 Difference]: Finished difference Result 189 states and 215 transitions. [2018-07-23 23:40:44,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-23 23:40:44,952 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 142 [2018-07-23 23:40:44,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:44,954 INFO L225 Difference]: With dead ends: 189 [2018-07-23 23:40:44,954 INFO L226 Difference]: Without dead ends: 150 [2018-07-23 23:40:44,956 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 23:40:44,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-07-23 23:40:44,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2018-07-23 23:40:44,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-07-23 23:40:44,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 161 transitions. [2018-07-23 23:40:44,961 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 161 transitions. Word has length 142 [2018-07-23 23:40:44,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:44,961 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 161 transitions. [2018-07-23 23:40:44,961 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-23 23:40:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 161 transitions. [2018-07-23 23:40:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-07-23 23:40:44,962 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:44,962 INFO L353 BasicCegarLoop]: trace histogram [48, 47, 35, 12, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:44,962 INFO L414 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:44,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1780491730, now seen corresponding path program 34 times [2018-07-23 23:40:44,963 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:44,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:44,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:44,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:44,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 1260 proven. 1890 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-07-23 23:40:45,584 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:45,584 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:40:45,591 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:40:45,649 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:40:45,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:45,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 1260 proven. 1890 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-07-23 23:40:45,709 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:45,710 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-07-23 23:40:45,710 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 23:40:45,710 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 23:40:45,711 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 23:40:45,711 INFO L87 Difference]: Start difference. First operand 149 states and 161 transitions. Second operand 38 states. [2018-07-23 23:40:45,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:45,962 INFO L93 Difference]: Finished difference Result 194 states and 219 transitions. [2018-07-23 23:40:45,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 23:40:45,962 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 148 [2018-07-23 23:40:45,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:45,964 INFO L225 Difference]: With dead ends: 194 [2018-07-23 23:40:45,964 INFO L226 Difference]: Without dead ends: 152 [2018-07-23 23:40:45,965 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 23:40:45,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-07-23 23:40:45,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-07-23 23:40:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-07-23 23:40:45,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 164 transitions. [2018-07-23 23:40:45,971 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 164 transitions. Word has length 148 [2018-07-23 23:40:45,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:45,971 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 164 transitions. [2018-07-23 23:40:45,971 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 23:40:45,971 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 164 transitions. [2018-07-23 23:40:45,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-07-23 23:40:45,972 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:45,972 INFO L353 BasicCegarLoop]: trace histogram [49, 48, 36, 12, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:45,972 INFO L414 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:45,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1582660881, now seen corresponding path program 35 times [2018-07-23 23:40:45,973 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:45,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:45,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:45,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:45,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 1295 proven. 1998 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-07-23 23:40:47,155 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:47,155 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:40:47,162 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:40:47,234 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-07-23 23:40:47,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:47,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 1295 proven. 1998 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-07-23 23:40:47,283 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:47,284 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-07-23 23:40:47,284 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 23:40:47,284 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 23:40:47,285 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 23:40:47,285 INFO L87 Difference]: Start difference. First operand 152 states and 164 transitions. Second operand 39 states. [2018-07-23 23:40:47,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:47,439 INFO L93 Difference]: Finished difference Result 197 states and 222 transitions. [2018-07-23 23:40:47,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-23 23:40:47,440 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 151 [2018-07-23 23:40:47,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:47,442 INFO L225 Difference]: With dead ends: 197 [2018-07-23 23:40:47,442 INFO L226 Difference]: Without dead ends: 155 [2018-07-23 23:40:47,442 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 23:40:47,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-07-23 23:40:47,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-07-23 23:40:47,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-07-23 23:40:47,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 167 transitions. [2018-07-23 23:40:47,448 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 167 transitions. Word has length 151 [2018-07-23 23:40:47,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:47,448 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 167 transitions. [2018-07-23 23:40:47,448 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 23:40:47,448 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 167 transitions. [2018-07-23 23:40:47,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-07-23 23:40:47,449 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:47,450 INFO L353 BasicCegarLoop]: trace histogram [50, 49, 37, 12, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:47,450 INFO L414 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:47,450 INFO L82 PathProgramCache]: Analyzing trace with hash 265014094, now seen corresponding path program 36 times [2018-07-23 23:40:47,450 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:47,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:47,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:47,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:47,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 1330 proven. 2109 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-07-23 23:40:49,399 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:49,399 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:40:49,406 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:40:49,762 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-07-23 23:40:49,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:49,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 1406 proven. 222 refuted. 0 times theorem prover too weak. 1998 trivial. 0 not checked. [2018-07-23 23:40:50,279 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:50,280 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 15] total 53 [2018-07-23 23:40:50,280 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-23 23:40:50,281 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-23 23:40:50,281 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 23:40:50,282 INFO L87 Difference]: Start difference. First operand 155 states and 167 transitions. Second operand 53 states. [2018-07-23 23:40:50,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:50,577 INFO L93 Difference]: Finished difference Result 204 states and 232 transitions. [2018-07-23 23:40:50,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-23 23:40:50,577 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 154 [2018-07-23 23:40:50,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:50,578 INFO L225 Difference]: With dead ends: 204 [2018-07-23 23:40:50,579 INFO L226 Difference]: Without dead ends: 162 [2018-07-23 23:40:50,580 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 23:40:50,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-07-23 23:40:50,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-07-23 23:40:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-07-23 23:40:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 174 transitions. [2018-07-23 23:40:50,584 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 174 transitions. Word has length 154 [2018-07-23 23:40:50,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:50,585 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 174 transitions. [2018-07-23 23:40:50,585 INFO L472 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-23 23:40:50,585 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 174 transitions. [2018-07-23 23:40:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-07-23 23:40:50,586 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:50,586 INFO L353 BasicCegarLoop]: trace histogram [52, 51, 38, 13, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:50,586 INFO L414 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:50,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1764700500, now seen corresponding path program 37 times [2018-07-23 23:40:50,586 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:50,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:50,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:50,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:50,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 1482 proven. 2223 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-07-23 23:40:51,561 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:51,561 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:40:51,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:51,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 1482 proven. 2223 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-07-23 23:40:51,658 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:51,659 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-07-23 23:40:51,659 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 23:40:51,659 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 23:40:51,660 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 23:40:51,660 INFO L87 Difference]: Start difference. First operand 161 states and 174 transitions. Second operand 41 states. [2018-07-23 23:40:51,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:51,885 INFO L93 Difference]: Finished difference Result 209 states and 236 transitions. [2018-07-23 23:40:51,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-23 23:40:51,885 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 160 [2018-07-23 23:40:51,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:51,886 INFO L225 Difference]: With dead ends: 209 [2018-07-23 23:40:51,886 INFO L226 Difference]: Without dead ends: 164 [2018-07-23 23:40:51,887 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 23:40:51,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-07-23 23:40:51,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-07-23 23:40:51,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-07-23 23:40:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 177 transitions. [2018-07-23 23:40:51,891 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 177 transitions. Word has length 160 [2018-07-23 23:40:51,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:51,891 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 177 transitions. [2018-07-23 23:40:51,891 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 23:40:51,891 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 177 transitions. [2018-07-23 23:40:51,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-07-23 23:40:51,892 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:51,892 INFO L353 BasicCegarLoop]: trace histogram [53, 52, 39, 13, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:51,893 INFO L414 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:51,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1072548593, now seen corresponding path program 38 times [2018-07-23 23:40:51,893 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:51,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:51,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:51,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:40:51,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 1520 proven. 2340 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-07-23 23:40:53,323 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:53,323 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:40:53,330 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:40:53,365 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:40:53,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:53,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 1520 proven. 2340 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-07-23 23:40:53,431 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:53,432 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-07-23 23:40:53,432 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 23:40:53,432 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 23:40:53,433 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 23:40:53,433 INFO L87 Difference]: Start difference. First operand 164 states and 177 transitions. Second operand 42 states. [2018-07-23 23:40:54,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:54,567 INFO L93 Difference]: Finished difference Result 212 states and 239 transitions. [2018-07-23 23:40:54,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 23:40:54,567 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 163 [2018-07-23 23:40:54,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:54,569 INFO L225 Difference]: With dead ends: 212 [2018-07-23 23:40:54,569 INFO L226 Difference]: Without dead ends: 167 [2018-07-23 23:40:54,570 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 23:40:54,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-07-23 23:40:54,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-07-23 23:40:54,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-07-23 23:40:54,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 180 transitions. [2018-07-23 23:40:54,575 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 180 transitions. Word has length 163 [2018-07-23 23:40:54,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:54,575 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 180 transitions. [2018-07-23 23:40:54,575 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 23:40:54,575 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 180 transitions. [2018-07-23 23:40:54,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-07-23 23:40:54,576 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:54,576 INFO L353 BasicCegarLoop]: trace histogram [54, 53, 40, 13, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:54,577 INFO L414 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:54,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1313075252, now seen corresponding path program 39 times [2018-07-23 23:40:54,577 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:54,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:54,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:54,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:54,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 1558 proven. 2460 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-07-23 23:40:55,875 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:55,875 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:40:55,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:40:55,916 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-07-23 23:40:55,916 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:55,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 1640 proven. 260 refuted. 0 times theorem prover too weak. 2340 trivial. 0 not checked. [2018-07-23 23:40:57,485 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:57,485 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 16] total 57 [2018-07-23 23:40:57,485 INFO L450 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-23 23:40:57,486 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-23 23:40:57,486 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 23:40:57,486 INFO L87 Difference]: Start difference. First operand 167 states and 180 transitions. Second operand 57 states. [2018-07-23 23:40:57,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:57,752 INFO L93 Difference]: Finished difference Result 219 states and 249 transitions. [2018-07-23 23:40:57,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-07-23 23:40:57,752 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 166 [2018-07-23 23:40:57,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:57,754 INFO L225 Difference]: With dead ends: 219 [2018-07-23 23:40:57,754 INFO L226 Difference]: Without dead ends: 174 [2018-07-23 23:40:57,755 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 23:40:57,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-07-23 23:40:57,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2018-07-23 23:40:57,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-07-23 23:40:57,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 187 transitions. [2018-07-23 23:40:57,760 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 187 transitions. Word has length 166 [2018-07-23 23:40:57,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:57,760 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 187 transitions. [2018-07-23 23:40:57,760 INFO L472 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-23 23:40:57,760 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 187 transitions. [2018-07-23 23:40:57,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-07-23 23:40:57,761 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:57,761 INFO L353 BasicCegarLoop]: trace histogram [56, 55, 41, 14, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:57,761 INFO L414 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:57,761 INFO L82 PathProgramCache]: Analyzing trace with hash -142901778, now seen corresponding path program 40 times [2018-07-23 23:40:57,762 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:57,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:57,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:57,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:57,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 1722 proven. 2583 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-07-23 23:40:58,656 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:58,656 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:40:58,663 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:40:58,700 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:40:58,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:58,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 1722 proven. 2583 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-07-23 23:40:58,757 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:58,757 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-07-23 23:40:58,757 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 23:40:58,758 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 23:40:58,758 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 23:40:58,758 INFO L87 Difference]: Start difference. First operand 173 states and 187 transitions. Second operand 44 states. [2018-07-23 23:40:58,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:40:58,962 INFO L93 Difference]: Finished difference Result 224 states and 253 transitions. [2018-07-23 23:40:58,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 23:40:58,962 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 172 [2018-07-23 23:40:58,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:40:58,963 INFO L225 Difference]: With dead ends: 224 [2018-07-23 23:40:58,964 INFO L226 Difference]: Without dead ends: 176 [2018-07-23 23:40:58,964 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 23:40:58,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-07-23 23:40:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-07-23 23:40:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-07-23 23:40:58,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 190 transitions. [2018-07-23 23:40:58,967 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 190 transitions. Word has length 172 [2018-07-23 23:40:58,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:40:58,968 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 190 transitions. [2018-07-23 23:40:58,968 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 23:40:58,968 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 190 transitions. [2018-07-23 23:40:58,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-07-23 23:40:58,968 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:40:58,969 INFO L353 BasicCegarLoop]: trace histogram [57, 56, 42, 14, 1, 1, 1, 1, 1, 1] [2018-07-23 23:40:58,969 INFO L414 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:40:58,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1199609903, now seen corresponding path program 41 times [2018-07-23 23:40:58,969 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:40:58,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:40:58,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:58,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:40:58,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:40:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:40:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 1763 proven. 2709 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-07-23 23:40:59,815 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:40:59,815 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:40:59,822 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:40:59,907 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 57 check-sat command(s) [2018-07-23 23:40:59,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:40:59,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:40:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 1763 proven. 2709 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-07-23 23:40:59,958 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:40:59,958 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-07-23 23:40:59,958 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 23:40:59,959 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 23:40:59,959 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 23:40:59,959 INFO L87 Difference]: Start difference. First operand 176 states and 190 transitions. Second operand 45 states. [2018-07-23 23:41:00,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:00,143 INFO L93 Difference]: Finished difference Result 227 states and 256 transitions. [2018-07-23 23:41:00,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-23 23:41:00,143 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 175 [2018-07-23 23:41:00,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:00,145 INFO L225 Difference]: With dead ends: 227 [2018-07-23 23:41:00,145 INFO L226 Difference]: Without dead ends: 179 [2018-07-23 23:41:00,146 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 23:41:00,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-07-23 23:41:00,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-07-23 23:41:00,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-07-23 23:41:00,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 193 transitions. [2018-07-23 23:41:00,151 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 193 transitions. Word has length 175 [2018-07-23 23:41:00,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:00,151 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 193 transitions. [2018-07-23 23:41:00,151 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 23:41:00,151 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 193 transitions. [2018-07-23 23:41:00,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-07-23 23:41:00,152 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:00,152 INFO L353 BasicCegarLoop]: trace histogram [58, 57, 43, 14, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:00,152 INFO L414 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:00,153 INFO L82 PathProgramCache]: Analyzing trace with hash 518917902, now seen corresponding path program 42 times [2018-07-23 23:41:00,153 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:00,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:00,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:00,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:00,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 1804 proven. 2838 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-07-23 23:41:01,037 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:01,037 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:41:01,045 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:41:01,121 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2018-07-23 23:41:01,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:01,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 1892 proven. 301 refuted. 0 times theorem prover too weak. 2709 trivial. 0 not checked. [2018-07-23 23:41:01,820 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:01,821 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 17] total 61 [2018-07-23 23:41:01,821 INFO L450 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-07-23 23:41:01,821 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-07-23 23:41:01,821 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 23:41:01,822 INFO L87 Difference]: Start difference. First operand 179 states and 193 transitions. Second operand 61 states. [2018-07-23 23:41:02,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:02,150 INFO L93 Difference]: Finished difference Result 234 states and 266 transitions. [2018-07-23 23:41:02,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-07-23 23:41:02,151 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 178 [2018-07-23 23:41:02,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:02,151 INFO L225 Difference]: With dead ends: 234 [2018-07-23 23:41:02,152 INFO L226 Difference]: Without dead ends: 186 [2018-07-23 23:41:02,152 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 23:41:02,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-07-23 23:41:02,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2018-07-23 23:41:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-07-23 23:41:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 200 transitions. [2018-07-23 23:41:02,155 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 200 transitions. Word has length 178 [2018-07-23 23:41:02,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:02,155 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 200 transitions. [2018-07-23 23:41:02,156 INFO L472 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-07-23 23:41:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 200 transitions. [2018-07-23 23:41:02,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-07-23 23:41:02,156 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:02,156 INFO L353 BasicCegarLoop]: trace histogram [60, 59, 44, 15, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:02,157 INFO L414 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:02,157 INFO L82 PathProgramCache]: Analyzing trace with hash -523465748, now seen corresponding path program 43 times [2018-07-23 23:41:02,157 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:02,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:02,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:02,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:02,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 1980 proven. 2970 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-07-23 23:41:03,152 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:03,153 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:41:03,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:03,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 1980 proven. 2970 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-07-23 23:41:03,262 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:03,263 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-07-23 23:41:03,263 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 23:41:03,263 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 23:41:03,263 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 23:41:03,264 INFO L87 Difference]: Start difference. First operand 185 states and 200 transitions. Second operand 47 states. [2018-07-23 23:41:03,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:03,454 INFO L93 Difference]: Finished difference Result 239 states and 270 transitions. [2018-07-23 23:41:03,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-23 23:41:03,454 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 184 [2018-07-23 23:41:03,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:03,456 INFO L225 Difference]: With dead ends: 239 [2018-07-23 23:41:03,456 INFO L226 Difference]: Without dead ends: 188 [2018-07-23 23:41:03,456 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 23:41:03,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-07-23 23:41:03,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2018-07-23 23:41:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-07-23 23:41:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 203 transitions. [2018-07-23 23:41:03,460 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 203 transitions. Word has length 184 [2018-07-23 23:41:03,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:03,460 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 203 transitions. [2018-07-23 23:41:03,460 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 23:41:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 203 transitions. [2018-07-23 23:41:03,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-07-23 23:41:03,461 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:03,462 INFO L353 BasicCegarLoop]: trace histogram [61, 60, 45, 15, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:03,462 INFO L414 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:03,462 INFO L82 PathProgramCache]: Analyzing trace with hash -194397873, now seen corresponding path program 44 times [2018-07-23 23:41:03,462 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:03,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:03,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:03,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:03,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 2024 proven. 3105 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-07-23 23:41:04,483 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:04,484 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:41:04,491 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:41:04,535 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:41:04,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:04,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 2024 proven. 3105 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-07-23 23:41:04,611 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:04,612 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-07-23 23:41:04,612 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 23:41:04,612 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 23:41:04,613 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 23:41:04,613 INFO L87 Difference]: Start difference. First operand 188 states and 203 transitions. Second operand 48 states. [2018-07-23 23:41:04,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:04,809 INFO L93 Difference]: Finished difference Result 242 states and 273 transitions. [2018-07-23 23:41:04,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 23:41:04,809 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 187 [2018-07-23 23:41:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:04,810 INFO L225 Difference]: With dead ends: 242 [2018-07-23 23:41:04,810 INFO L226 Difference]: Without dead ends: 191 [2018-07-23 23:41:04,810 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 23:41:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-07-23 23:41:04,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-07-23 23:41:04,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-07-23 23:41:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 206 transitions. [2018-07-23 23:41:04,815 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 206 transitions. Word has length 187 [2018-07-23 23:41:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:04,815 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 206 transitions. [2018-07-23 23:41:04,815 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 23:41:04,815 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 206 transitions. [2018-07-23 23:41:04,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-07-23 23:41:04,816 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:04,816 INFO L353 BasicCegarLoop]: trace histogram [62, 61, 46, 15, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:04,816 INFO L414 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:04,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1951296780, now seen corresponding path program 45 times [2018-07-23 23:41:04,816 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:04,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:04,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:04,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:04,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 2068 proven. 3243 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-07-23 23:41:05,813 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:05,813 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:41:05,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:41:05,870 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-07-23 23:41:05,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:05,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 2162 proven. 345 refuted. 0 times theorem prover too weak. 3105 trivial. 0 not checked. [2018-07-23 23:41:06,911 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:06,911 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 18] total 65 [2018-07-23 23:41:06,911 INFO L450 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-07-23 23:41:06,912 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-07-23 23:41:06,912 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 23:41:06,912 INFO L87 Difference]: Start difference. First operand 191 states and 206 transitions. Second operand 65 states. [2018-07-23 23:41:07,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:07,326 INFO L93 Difference]: Finished difference Result 249 states and 283 transitions. [2018-07-23 23:41:07,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-07-23 23:41:07,327 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 190 [2018-07-23 23:41:07,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:07,328 INFO L225 Difference]: With dead ends: 249 [2018-07-23 23:41:07,328 INFO L226 Difference]: Without dead ends: 198 [2018-07-23 23:41:07,329 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 23:41:07,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-07-23 23:41:07,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2018-07-23 23:41:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-07-23 23:41:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 213 transitions. [2018-07-23 23:41:07,334 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 213 transitions. Word has length 190 [2018-07-23 23:41:07,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:07,335 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 213 transitions. [2018-07-23 23:41:07,335 INFO L472 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-07-23 23:41:07,335 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 213 transitions. [2018-07-23 23:41:07,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-07-23 23:41:07,336 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:07,336 INFO L353 BasicCegarLoop]: trace histogram [64, 63, 47, 16, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:07,336 INFO L414 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:07,337 INFO L82 PathProgramCache]: Analyzing trace with hash 553726382, now seen corresponding path program 46 times [2018-07-23 23:41:07,337 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:07,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:07,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:07,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:07,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:09,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 2256 proven. 3384 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-07-23 23:41:09,098 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:09,099 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:41:09,108 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:41:09,153 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:41:09,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:09,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 2256 proven. 3384 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-07-23 23:41:09,211 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:09,211 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-07-23 23:41:09,211 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 23:41:09,212 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 23:41:09,212 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 23:41:09,212 INFO L87 Difference]: Start difference. First operand 197 states and 213 transitions. Second operand 50 states. [2018-07-23 23:41:10,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:10,334 INFO L93 Difference]: Finished difference Result 254 states and 287 transitions. [2018-07-23 23:41:10,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-23 23:41:10,334 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 196 [2018-07-23 23:41:10,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:10,336 INFO L225 Difference]: With dead ends: 254 [2018-07-23 23:41:10,336 INFO L226 Difference]: Without dead ends: 200 [2018-07-23 23:41:10,337 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 23:41:10,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-07-23 23:41:10,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-07-23 23:41:10,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-07-23 23:41:10,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 216 transitions. [2018-07-23 23:41:10,343 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 216 transitions. Word has length 196 [2018-07-23 23:41:10,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:10,343 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 216 transitions. [2018-07-23 23:41:10,343 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 23:41:10,343 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 216 transitions. [2018-07-23 23:41:10,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-07-23 23:41:10,344 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:10,344 INFO L353 BasicCegarLoop]: trace histogram [65, 64, 48, 16, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:10,344 INFO L414 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:10,345 INFO L82 PathProgramCache]: Analyzing trace with hash -168926575, now seen corresponding path program 47 times [2018-07-23 23:41:10,345 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:10,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:10,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:10,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:10,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:10,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 2303 proven. 3528 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-07-23 23:41:12,810 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:12,810 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:41:12,816 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:41:12,914 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2018-07-23 23:41:12,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:12,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 2303 proven. 3528 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-07-23 23:41:12,978 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:12,978 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-07-23 23:41:12,978 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-23 23:41:12,979 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-23 23:41:12,979 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 23:41:12,979 INFO L87 Difference]: Start difference. First operand 200 states and 216 transitions. Second operand 51 states. [2018-07-23 23:41:13,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:13,186 INFO L93 Difference]: Finished difference Result 257 states and 290 transitions. [2018-07-23 23:41:13,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-23 23:41:13,187 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 199 [2018-07-23 23:41:13,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:13,188 INFO L225 Difference]: With dead ends: 257 [2018-07-23 23:41:13,188 INFO L226 Difference]: Without dead ends: 203 [2018-07-23 23:41:13,189 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 23:41:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-07-23 23:41:13,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-07-23 23:41:13,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-07-23 23:41:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 219 transitions. [2018-07-23 23:41:13,193 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 219 transitions. Word has length 199 [2018-07-23 23:41:13,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:13,194 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 219 transitions. [2018-07-23 23:41:13,194 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-23 23:41:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 219 transitions. [2018-07-23 23:41:13,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-07-23 23:41:13,195 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:13,195 INFO L353 BasicCegarLoop]: trace histogram [66, 65, 49, 16, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:13,195 INFO L414 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:13,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1947886286, now seen corresponding path program 48 times [2018-07-23 23:41:13,196 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:13,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:13,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:13,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:13,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 2350 proven. 3675 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-07-23 23:41:14,517 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:14,517 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:41:14,524 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:41:14,605 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2018-07-23 23:41:14,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:14,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 2450 proven. 392 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2018-07-23 23:41:15,475 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:15,475 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 19] total 69 [2018-07-23 23:41:15,475 INFO L450 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-07-23 23:41:15,476 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-07-23 23:41:15,477 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 23:41:15,477 INFO L87 Difference]: Start difference. First operand 203 states and 219 transitions. Second operand 69 states. [2018-07-23 23:41:15,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:15,896 INFO L93 Difference]: Finished difference Result 264 states and 300 transitions. [2018-07-23 23:41:15,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-07-23 23:41:15,897 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 202 [2018-07-23 23:41:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:15,898 INFO L225 Difference]: With dead ends: 264 [2018-07-23 23:41:15,898 INFO L226 Difference]: Without dead ends: 210 [2018-07-23 23:41:15,899 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 23:41:15,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-07-23 23:41:15,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2018-07-23 23:41:15,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-07-23 23:41:15,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 226 transitions. [2018-07-23 23:41:15,904 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 226 transitions. Word has length 202 [2018-07-23 23:41:15,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:15,904 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 226 transitions. [2018-07-23 23:41:15,905 INFO L472 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-07-23 23:41:15,905 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 226 transitions. [2018-07-23 23:41:15,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-07-23 23:41:15,906 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:15,906 INFO L353 BasicCegarLoop]: trace histogram [68, 67, 50, 17, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:15,906 INFO L414 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:15,906 INFO L82 PathProgramCache]: Analyzing trace with hash 852048172, now seen corresponding path program 49 times [2018-07-23 23:41:15,907 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:15,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:15,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:15,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:15,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 2832 proven. 551 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-07-23 23:41:16,535 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:16,535 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:41:16,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:16,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:19,115 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:19,115 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 70] total 72 [2018-07-23 23:41:19,115 INFO L450 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-23 23:41:19,116 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-23 23:41:19,116 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 23:41:19,116 INFO L87 Difference]: Start difference. First operand 209 states and 226 transitions. Second operand 72 states. [2018-07-23 23:41:19,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:19,420 INFO L93 Difference]: Finished difference Result 223 states and 246 transitions. [2018-07-23 23:41:19,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-23 23:41:19,420 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 208 [2018-07-23 23:41:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:19,422 INFO L225 Difference]: With dead ends: 223 [2018-07-23 23:41:19,422 INFO L226 Difference]: Without dead ends: 219 [2018-07-23 23:41:19,423 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 23:41:19,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-07-23 23:41:19,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2018-07-23 23:41:19,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-07-23 23:41:19,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 238 transitions. [2018-07-23 23:41:19,428 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 238 transitions. Word has length 208 [2018-07-23 23:41:19,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:19,429 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 238 transitions. [2018-07-23 23:41:19,429 INFO L472 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-23 23:41:19,429 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 238 transitions. [2018-07-23 23:41:19,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-07-23 23:41:19,430 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:19,431 INFO L353 BasicCegarLoop]: trace histogram [71, 70, 50, 20, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:19,431 INFO L414 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:19,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1868974513, now seen corresponding path program 50 times [2018-07-23 23:41:19,431 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:19,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:19,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:19,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 23:41:19,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 3264 proven. 737 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-07-23 23:41:19,803 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:19,803 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:41:19,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-23 23:41:19,862 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-23 23:41:19,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:19,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:22,001 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:22,001 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 73] total 75 [2018-07-23 23:41:22,001 INFO L450 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-07-23 23:41:22,002 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-07-23 23:41:22,002 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 23:41:22,003 INFO L87 Difference]: Start difference. First operand 218 states and 238 transitions. Second operand 75 states. [2018-07-23 23:41:22,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:22,398 INFO L93 Difference]: Finished difference Result 232 states and 258 transitions. [2018-07-23 23:41:22,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-07-23 23:41:22,399 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 217 [2018-07-23 23:41:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:22,401 INFO L225 Difference]: With dead ends: 232 [2018-07-23 23:41:22,401 INFO L226 Difference]: Without dead ends: 228 [2018-07-23 23:41:22,402 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2200 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 23:41:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-07-23 23:41:22,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2018-07-23 23:41:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-07-23 23:41:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 250 transitions. [2018-07-23 23:41:22,406 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 250 transitions. Word has length 217 [2018-07-23 23:41:22,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:22,407 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 250 transitions. [2018-07-23 23:41:22,407 INFO L472 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-07-23 23:41:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 250 transitions. [2018-07-23 23:41:22,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-07-23 23:41:22,408 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:22,408 INFO L353 BasicCegarLoop]: trace histogram [74, 73, 50, 23, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:22,408 INFO L414 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:22,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1801257268, now seen corresponding path program 51 times [2018-07-23 23:41:22,408 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:22,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:22,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:22,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:22,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 3696 proven. 950 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-07-23 23:41:22,942 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:22,942 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:41:22,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-23 23:41:23,012 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-07-23 23:41:23,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:23,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 3550 proven. 805 refuted. 0 times theorem prover too weak. 3675 trivial. 0 not checked. [2018-07-23 23:41:23,072 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:23,072 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 28 [2018-07-23 23:41:23,072 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 23:41:23,073 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 23:41:23,073 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-23 23:41:23,073 INFO L87 Difference]: Start difference. First operand 227 states and 250 transitions. Second operand 28 states. [2018-07-23 23:41:23,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:23,208 INFO L93 Difference]: Finished difference Result 241 states and 270 transitions. [2018-07-23 23:41:23,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 23:41:23,209 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 226 [2018-07-23 23:41:23,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:23,211 INFO L225 Difference]: With dead ends: 241 [2018-07-23 23:41:23,211 INFO L226 Difference]: Without dead ends: 237 [2018-07-23 23:41:23,212 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-23 23:41:23,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-07-23 23:41:23,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2018-07-23 23:41:23,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-07-23 23:41:23,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 262 transitions. [2018-07-23 23:41:23,217 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 262 transitions. Word has length 226 [2018-07-23 23:41:23,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:23,218 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 262 transitions. [2018-07-23 23:41:23,218 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 23:41:23,218 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 262 transitions. [2018-07-23 23:41:23,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-07-23 23:41:23,219 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:23,219 INFO L353 BasicCegarLoop]: trace histogram [77, 76, 50, 26, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:23,219 INFO L414 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:23,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1134614545, now seen corresponding path program 52 times [2018-07-23 23:41:23,220 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:23,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:23,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:23,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:23,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 4128 proven. 1190 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-07-23 23:41:24,197 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:24,197 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:41:24,205 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-23 23:41:24,268 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-23 23:41:24,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:24,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 23:41:25,653 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:25,653 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 79] total 81 [2018-07-23 23:41:25,654 INFO L450 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-07-23 23:41:25,654 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-07-23 23:41:25,655 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 23:41:25,655 INFO L87 Difference]: Start difference. First operand 236 states and 262 transitions. Second operand 81 states. [2018-07-23 23:41:26,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:26,157 INFO L93 Difference]: Finished difference Result 250 states and 282 transitions. [2018-07-23 23:41:26,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-07-23 23:41:26,157 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 235 [2018-07-23 23:41:26,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:26,158 INFO L225 Difference]: With dead ends: 250 [2018-07-23 23:41:26,158 INFO L226 Difference]: Without dead ends: 246 [2018-07-23 23:41:26,159 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 23:41:26,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-07-23 23:41:26,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2018-07-23 23:41:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-07-23 23:41:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 274 transitions. [2018-07-23 23:41:26,162 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 274 transitions. Word has length 235 [2018-07-23 23:41:26,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:26,163 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 274 transitions. [2018-07-23 23:41:26,163 INFO L472 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-07-23 23:41:26,163 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 274 transitions. [2018-07-23 23:41:26,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-07-23 23:41:26,164 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:26,164 INFO L353 BasicCegarLoop]: trace histogram [80, 79, 50, 29, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:26,164 INFO L414 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:26,164 INFO L82 PathProgramCache]: Analyzing trace with hash 972201068, now seen corresponding path program 53 times [2018-07-23 23:41:26,164 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:26,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:26,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:26,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:26,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:26,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 4560 proven. 1457 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-07-23 23:41:26,961 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:26,961 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:41:26,968 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-23 23:41:27,113 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 80 check-sat command(s) [2018-07-23 23:41:27,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:27,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 4470 proven. 3626 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2018-07-23 23:41:28,239 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:28,239 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 52] total 52 [2018-07-23 23:41:28,240 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 23:41:28,240 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 23:41:28,240 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 23:41:28,240 INFO L87 Difference]: Start difference. First operand 245 states and 274 transitions. Second operand 52 states. [2018-07-23 23:41:28,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:28,555 INFO L93 Difference]: Finished difference Result 312 states and 382 transitions. [2018-07-23 23:41:28,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-23 23:41:28,555 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 244 [2018-07-23 23:41:28,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:28,557 INFO L225 Difference]: With dead ends: 312 [2018-07-23 23:41:28,558 INFO L226 Difference]: Without dead ends: 308 [2018-07-23 23:41:28,558 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 23:41:28,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-07-23 23:41:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2018-07-23 23:41:28,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2018-07-23 23:41:28,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 358 transitions. [2018-07-23 23:41:28,564 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 358 transitions. Word has length 244 [2018-07-23 23:41:28,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:28,565 INFO L471 AbstractCegarLoop]: Abstraction has 308 states and 358 transitions. [2018-07-23 23:41:28,565 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 23:41:28,565 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 358 transitions. [2018-07-23 23:41:28,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-07-23 23:41:28,566 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:28,567 INFO L353 BasicCegarLoop]: trace histogram [101, 100, 50, 50, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:28,567 INFO L414 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:28,567 INFO L82 PathProgramCache]: Analyzing trace with hash -378887791, now seen corresponding path program 54 times [2018-07-23 23:41:28,567 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:28,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:28,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:28,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:28,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 11225 refuted. 0 times theorem prover too weak. 3825 trivial. 0 not checked. [2018-07-23 23:41:30,723 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 23:41:30,724 INFO L221 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-23 23:41:30,733 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-23 23:41:31,015 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 101 check-sat command(s) [2018-07-23 23:41:31,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-23 23:41:31,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-23 23:41:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 11225 refuted. 0 times theorem prover too weak. 3825 trivial. 0 not checked. [2018-07-23 23:41:31,226 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-23 23:41:31,226 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-07-23 23:41:31,227 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 23:41:31,227 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 23:41:31,227 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 23:41:31,228 INFO L87 Difference]: Start difference. First operand 308 states and 358 transitions. Second operand 54 states. [2018-07-23 23:41:33,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:33,692 INFO L93 Difference]: Finished difference Result 4289 states and 5664 transitions. [2018-07-23 23:41:33,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 23:41:33,693 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 307 [2018-07-23 23:41:33,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:33,710 INFO L225 Difference]: With dead ends: 4289 [2018-07-23 23:41:33,710 INFO L226 Difference]: Without dead ends: 4285 [2018-07-23 23:41:33,711 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 307 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 23:41:33,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2018-07-23 23:41:33,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 311. [2018-07-23 23:41:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-07-23 23:41:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 362 transitions. [2018-07-23 23:41:33,779 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 362 transitions. Word has length 307 [2018-07-23 23:41:33,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:33,780 INFO L471 AbstractCegarLoop]: Abstraction has 311 states and 362 transitions. [2018-07-23 23:41:33,780 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 23:41:33,780 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 362 transitions. [2018-07-23 23:41:33,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-07-23 23:41:33,781 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 23:41:33,782 INFO L353 BasicCegarLoop]: trace histogram [102, 101, 51, 50, 1, 1, 1, 1, 1, 1] [2018-07-23 23:41:33,782 INFO L414 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 23:41:33,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1341702412, now seen corresponding path program 55 times [2018-07-23 23:41:33,782 INFO L221 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-23 23:41:33,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-23 23:41:33,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:33,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-23 23:41:33,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 23:41:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 23:41:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 15352 backedges. 11527 proven. 0 refuted. 0 times theorem prover too weak. 3825 trivial. 0 not checked. [2018-07-23 23:41:35,548 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 23:41:35,548 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2018-07-23 23:41:35,548 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 23:41:35,549 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 23:41:35,549 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 23:41:35,549 INFO L87 Difference]: Start difference. First operand 311 states and 362 transitions. Second operand 52 states. [2018-07-23 23:41:35,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 23:41:35,962 INFO L93 Difference]: Finished difference Result 460 states and 560 transitions. [2018-07-23 23:41:35,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-23 23:41:35,964 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 310 [2018-07-23 23:41:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 23:41:35,965 INFO L225 Difference]: With dead ends: 460 [2018-07-23 23:41:35,965 INFO L226 Difference]: Without dead ends: 0 [2018-07-23 23:41:35,966 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 23:41:35,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-07-23 23:41:35,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-07-23 23:41:35,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-07-23 23:41:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-07-23 23:41:35,967 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 310 [2018-07-23 23:41:35,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 23:41:35,967 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-07-23 23:41:35,967 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 23:41:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-07-23 23:41:35,967 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-07-23 23:41:35,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-07-23 23:41:36,877 WARN L169 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 1832 DAG size of output: 407 [2018-07-23 23:41:39,879 WARN L169 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 407 DAG size of output: 357 [2018-07-23 23:41:39,892 INFO L421 ceAbstractionStarter]: For program point L13''(lines 13 20) no Hoare annotation was computed. [2018-07-23 23:41:39,894 INFO L417 ceAbstractionStarter]: At program point L14''(lines 13 20) the Hoare annotation is: (or (and (and (<= ULTIMATE.start_main_~y~0 72) (<= 72 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 72)) (<= 72 ULTIMATE.start_main_~x~0)) (and (<= 86 ULTIMATE.start_main_~x~0) (and (<= 86 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 86) (<= ULTIMATE.start_main_~y~0 86))) (and (and (<= 95 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 95) (<= ULTIMATE.start_main_~x~0 95)) (<= 95 ULTIMATE.start_main_~x~0)) (and (and (<= 76 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 76) (<= ULTIMATE.start_main_~y~0 76)) (<= 76 ULTIMATE.start_main_~x~0)) (and (<= 82 ULTIMATE.start_main_~x~0) (and (<= 82 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 82) (<= ULTIMATE.start_main_~x~0 82))) (and (and (<= ULTIMATE.start_main_~y~0 70) (<= ULTIMATE.start_main_~x~0 70) (<= 70 ULTIMATE.start_main_~y~0)) (<= 70 ULTIMATE.start_main_~x~0)) (and (<= 52 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 52) (<= 52 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 52))) (and (<= 87 ULTIMATE.start_main_~x~0) (and (<= 87 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 87) (<= ULTIMATE.start_main_~y~0 87))) (and (<= 81 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 81) (<= ULTIMATE.start_main_~x~0 81) (<= 81 ULTIMATE.start_main_~y~0))) (and (and (<= ULTIMATE.start_main_~y~0 98) (<= 98 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 98)) (<= 98 ULTIMATE.start_main_~x~0)) (and (<= 84 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 84) (<= 84 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 84))) (and (<= 85 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 85) (<= 85 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 85))) (and (and (<= 68 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 68) (<= ULTIMATE.start_main_~y~0 68)) (<= 68 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 91) (<= 91 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 91)) (<= 91 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 58) (<= ULTIMATE.start_main_~x~0 58) (<= 58 ULTIMATE.start_main_~y~0)) (<= 58 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 65) (<= ULTIMATE.start_main_~x~0 65) (<= 65 ULTIMATE.start_main_~y~0)) (<= 65 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 79) (<= 79 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 79)) (<= 79 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 88) (<= ULTIMATE.start_main_~x~0 88) (<= 88 ULTIMATE.start_main_~y~0)) (<= 88 ULTIMATE.start_main_~x~0)) (and (<= 99 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 99) (<= 99 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 99))) (and (<= 55 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 55) (<= 55 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 55))) (and (and (<= 93 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 93) (<= ULTIMATE.start_main_~y~0 93)) (<= 93 ULTIMATE.start_main_~x~0)) (and (<= 71 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 71) (<= ULTIMATE.start_main_~x~0 71) (<= 71 ULTIMATE.start_main_~y~0))) (and (<= 89 ULTIMATE.start_main_~x~0) (and (<= 89 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 89) (<= ULTIMATE.start_main_~y~0 89))) (and (<= 59 ULTIMATE.start_main_~x~0) (and (<= 59 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 59) (<= ULTIMATE.start_main_~x~0 59))) (and (and (<= 100 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 100)) (<= 100 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 50) (<= ULTIMATE.start_main_~y~0 50) (<= 50 ULTIMATE.start_main_~y~0)) (and (and (<= ULTIMATE.start_main_~x~0 78) (<= 78 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 78)) (<= 78 ULTIMATE.start_main_~x~0)) (and (<= 66 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 66) (<= ULTIMATE.start_main_~x~0 66) (<= 66 ULTIMATE.start_main_~y~0))) (and (<= 57 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~x~0 57) (<= ULTIMATE.start_main_~y~0 57) (<= 57 ULTIMATE.start_main_~y~0))) (and (and (<= ULTIMATE.start_main_~x~0 94) (<= ULTIMATE.start_main_~y~0 94) (<= 94 ULTIMATE.start_main_~y~0)) (<= 94 ULTIMATE.start_main_~x~0)) (and (<= 63 ULTIMATE.start_main_~x~0) (and (<= 63 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 63) (<= ULTIMATE.start_main_~x~0 63))) (and (and (<= 97 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 97) (<= ULTIMATE.start_main_~y~0 97)) (<= 97 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~x~0 74) (<= 74 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 74)) (<= 74 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~x~0 51) (<= ULTIMATE.start_main_~y~0 51) (<= 51 ULTIMATE.start_main_~y~0)) (<= 51 ULTIMATE.start_main_~x~0)) (and (and (<= 64 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 64) (<= ULTIMATE.start_main_~y~0 64)) (<= 64 ULTIMATE.start_main_~x~0)) (and (<= 73 ULTIMATE.start_main_~x~0) (and (<= 73 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 73) (<= ULTIMATE.start_main_~x~0 73))) (and (<= 67 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~x~0 67) (<= 67 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 67))) (and (<= 54 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 54) (<= 54 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 54))) (and (and (<= ULTIMATE.start_main_~y~0 69) (<= 69 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 69)) (<= 69 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~x~0 62) (<= ULTIMATE.start_main_~y~0 62) (<= 62 ULTIMATE.start_main_~y~0)) (<= 62 ULTIMATE.start_main_~x~0)) (and (and (<= 61 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 61) (<= ULTIMATE.start_main_~y~0 61)) (<= 61 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~x~0 53) (<= ULTIMATE.start_main_~y~0 53) (<= 53 ULTIMATE.start_main_~y~0)) (<= 53 ULTIMATE.start_main_~x~0)) (and (<= 60 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~x~0 60) (<= ULTIMATE.start_main_~y~0 60) (<= 60 ULTIMATE.start_main_~y~0))) (and (and (<= ULTIMATE.start_main_~y~0 75) (<= ULTIMATE.start_main_~x~0 75) (<= 75 ULTIMATE.start_main_~y~0)) (<= 75 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~x~0 90) (<= ULTIMATE.start_main_~y~0 90) (<= 90 ULTIMATE.start_main_~y~0)) (<= 90 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 96) (<= 96 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 96)) (<= 96 ULTIMATE.start_main_~x~0)) (and (and (<= 80 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 80) (<= ULTIMATE.start_main_~y~0 80)) (<= 80 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~x~0 83) (<= ULTIMATE.start_main_~y~0 83) (<= 83 ULTIMATE.start_main_~y~0)) (<= 83 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 56) (<= ULTIMATE.start_main_~x~0 56) (<= 56 ULTIMATE.start_main_~y~0)) (<= 56 ULTIMATE.start_main_~x~0)) (and (<= 77 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~x~0 77) (<= 77 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 77))) (and (<= 92 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 92) (<= ULTIMATE.start_main_~x~0 92) (<= 92 ULTIMATE.start_main_~y~0)))) [2018-07-23 23:41:39,894 INFO L424 ceAbstractionStarter]: At program point L22(lines 10 23) the Hoare annotation is: true [2018-07-23 23:41:39,894 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-07-23 23:41:39,895 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-07-23 23:41:39,895 INFO L421 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-07-23 23:41:39,895 INFO L421 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-07-23 23:41:39,895 INFO L424 ceAbstractionStarter]: At program point L4''(lines 3 8) the Hoare annotation is: true [2018-07-23 23:41:39,895 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.startErr0AssertViolationERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-07-23 23:41:39,895 INFO L421 ceAbstractionStarter]: For program point L14(lines 14 19) no Hoare annotation was computed. [2018-07-23 23:41:39,895 INFO L421 ceAbstractionStarter]: For program point L13(lines 13 20) no Hoare annotation was computed. [2018-07-23 23:41:39,895 INFO L421 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2018-07-23 23:41:39,895 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-07-23 23:41:39,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 11:41:39 BoogieIcfgContainer [2018-07-23 23:41:39,922 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 23:41:39,923 INFO L168 Benchmark]: Toolchain (without parser) took 82132.55 ms. Allocated memory was 1.5 GB in the beginning and 2.9 GB in the end (delta: 1.4 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -380.8 MB). Peak memory consumption was 982.9 MB. Max. memory is 7.1 GB. [2018-07-23 23:41:39,924 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 23:41:39,924 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.83 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-23 23:41:39,925 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.94 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 23:41:39,925 INFO L168 Benchmark]: Boogie Preprocessor took 27.03 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 23:41:39,926 INFO L168 Benchmark]: RCFGBuilder took 481.09 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 741.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -793.4 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-07-23 23:41:39,926 INFO L168 Benchmark]: TraceAbstraction took 81327.10 ms. Allocated memory was 2.3 GB in the beginning and 2.9 GB in the end (delta: 621.8 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 402.0 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2018-07-23 23:41:39,929 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 256.83 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 35.94 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.03 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 481.09 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 741.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -793.4 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 81327.10 ms. Allocated memory was 2.3 GB in the beginning and 2.9 GB in the end (delta: 621.8 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 402.0 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((y <= 72 && 72 <= y) && x <= 72) && 72 <= x) || (86 <= x && (86 <= y && x <= 86) && y <= 86)) || (((95 <= y && y <= 95) && x <= 95) && 95 <= x)) || (((76 <= y && x <= 76) && y <= 76) && 76 <= x)) || (82 <= x && (82 <= y && y <= 82) && x <= 82)) || (((y <= 70 && x <= 70) && 70 <= y) && 70 <= x)) || (52 <= x && (y <= 52 && 52 <= y) && x <= 52)) || (87 <= x && (87 <= y && x <= 87) && y <= 87)) || (81 <= x && (y <= 81 && x <= 81) && 81 <= y)) || (((y <= 98 && 98 <= y) && x <= 98) && 98 <= x)) || (84 <= x && (y <= 84 && 84 <= y) && x <= 84)) || (85 <= x && (y <= 85 && 85 <= y) && x <= 85)) || (((68 <= y && x <= 68) && y <= 68) && 68 <= x)) || (((y <= 91 && 91 <= y) && x <= 91) && 91 <= x)) || (((y <= 58 && x <= 58) && 58 <= y) && 58 <= x)) || (((y <= 65 && x <= 65) && 65 <= y) && 65 <= x)) || (((y <= 79 && 79 <= y) && x <= 79) && 79 <= x)) || (((y <= 88 && x <= 88) && 88 <= y) && 88 <= x)) || (99 <= x && (y <= 99 && 99 <= y) && x <= 99)) || (55 <= x && (y <= 55 && 55 <= y) && x <= 55)) || (((93 <= y && x <= 93) && y <= 93) && 93 <= x)) || (71 <= x && (y <= 71 && x <= 71) && 71 <= y)) || (89 <= x && (89 <= y && x <= 89) && y <= 89)) || (59 <= x && (59 <= y && y <= 59) && x <= 59)) || ((100 <= y && y <= 100) && 100 <= x)) || ((x <= 50 && y <= 50) && 50 <= y)) || (((x <= 78 && 78 <= y) && y <= 78) && 78 <= x)) || (66 <= x && (y <= 66 && x <= 66) && 66 <= y)) || (57 <= x && (x <= 57 && y <= 57) && 57 <= y)) || (((x <= 94 && y <= 94) && 94 <= y) && 94 <= x)) || (63 <= x && (63 <= y && y <= 63) && x <= 63)) || (((97 <= y && x <= 97) && y <= 97) && 97 <= x)) || (((x <= 74 && 74 <= y) && y <= 74) && 74 <= x)) || (((x <= 51 && y <= 51) && 51 <= y) && 51 <= x)) || (((64 <= y && x <= 64) && y <= 64) && 64 <= x)) || (73 <= x && (73 <= y && y <= 73) && x <= 73)) || (67 <= x && (x <= 67 && 67 <= y) && y <= 67)) || (54 <= x && (y <= 54 && 54 <= y) && x <= 54)) || (((y <= 69 && 69 <= y) && x <= 69) && 69 <= x)) || (((x <= 62 && y <= 62) && 62 <= y) && 62 <= x)) || (((61 <= y && x <= 61) && y <= 61) && 61 <= x)) || (((x <= 53 && y <= 53) && 53 <= y) && 53 <= x)) || (60 <= x && (x <= 60 && y <= 60) && 60 <= y)) || (((y <= 75 && x <= 75) && 75 <= y) && 75 <= x)) || (((x <= 90 && y <= 90) && 90 <= y) && 90 <= x)) || (((y <= 96 && 96 <= y) && x <= 96) && 96 <= x)) || (((80 <= y && x <= 80) && y <= 80) && 80 <= x)) || (((x <= 83 && y <= 83) && 83 <= y) && 83 <= x)) || (((y <= 56 && x <= 56) && 56 <= y) && 56 <= x)) || (77 <= x && (x <= 77 && 77 <= y) && y <= 77)) || (92 <= x && (y <= 92 && x <= 92) && 92 <= y) - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. SAFE Result, 81.2s OverallTime, 58 OverallIterations, 102 TraceHistogramMax, 16.1s AutomataDifference, 0.0s DeadEndRemovalTime, 3.9s HoareAnnotationTime, HoareTripleCheckerStatistics: 646 SDtfs, 948 SDslu, 13072 SDs, 0 SdLazy, 8243 SolverSat, 1931 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8248 GetRequests, 6418 SyntacticMatches, 1 SemanticMatches, 1829 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6900 ImplicationChecksByTransitivity, 51.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=311occurred in iteration=57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 58 MinimizatonAttempts, 3995 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 106 NumberOfFragments, 710 HoareAnnotationTreeSize, 3 FomulaSimplifications, 13400 FormulaSimplificationTreeSizeReduction, 0.9s HoareSimplificationTime, 3 FomulaSimplificationsInter, 200 FormulaSimplificationTreeSizeReductionInter, 3.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 54.4s InterpolantComputationTime, 13681 NumberOfCodeBlocks, 12883 NumberOfCodeBlocksAsserted, 965 NumberOfCheckSat, 13568 ConstructedInterpolants, 0 QuantifiedInterpolants, 5819482 SizeOfPredicates, 25 NumberOfNonLiveVariables, 11186 ConjunctsInSsa, 1456 ConjunctsInUnsatCore, 113 InterpolantComputations, 4 PerfectInterpolantSequences, 183380/343178 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/gj2007_true-unreach-call_true-termination.c.i_svcomp-Reach-64bit-Automizer_Default.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-23_23-41-39-948.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/gj2007_true-unreach-call_true-termination.c.i_svcomp-Reach-64bit-Automizer_Default.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_23-41-39-948.csv Received shutdown request...