java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label09_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 21:14:46,496 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 21:14:46,500 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 21:14:46,514 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 21:14:46,514 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 21:14:46,515 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 21:14:46,517 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 21:14:46,518 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 21:14:46,520 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 21:14:46,521 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 21:14:46,522 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 21:14:46,522 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 21:14:46,523 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 21:14:46,524 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 21:14:46,525 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 21:14:46,526 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 21:14:46,527 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 21:14:46,529 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 21:14:46,530 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 21:14:46,532 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 21:14:46,533 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 21:14:46,534 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 21:14:46,536 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 21:14:46,536 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 21:14:46,536 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 21:14:46,537 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 21:14:46,538 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 21:14:46,539 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 21:14:46,540 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 21:14:46,541 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 21:14:46,541 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 21:14:46,542 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 21:14:46,542 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 21:14:46,543 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 21:14:46,543 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 21:14:46,544 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 21:14:46,544 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-26 21:14:46,566 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 21:14:46,566 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 21:14:46,567 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 21:14:46,568 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 21:14:46,569 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 21:14:46,569 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 21:14:46,569 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 21:14:46,570 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 21:14:46,570 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 21:14:46,570 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 21:14:46,570 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 21:14:46,570 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 21:14:46,570 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 21:14:46,571 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 21:14:46,572 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 21:14:46,572 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 21:14:46,572 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 21:14:46,572 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 21:14:46,572 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 21:14:46,573 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:14:46,573 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 21:14:46,573 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 21:14:46,573 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 21:14:46,573 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 21:14:46,574 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 21:14:46,575 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 21:14:46,575 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 21:14:46,575 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 21:14:46,634 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 21:14:46,648 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 21:14:46,652 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 21:14:46,653 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 21:14:46,654 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 21:14:46,655 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label09_true-unreach-call.c [2018-10-26 21:14:46,713 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/67f3182e0/20cef3c675504c339496a913345c7758/FLAG9f7b2210c [2018-10-26 21:14:47,530 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 21:14:47,531 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label09_true-unreach-call.c [2018-10-26 21:14:47,571 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/67f3182e0/20cef3c675504c339496a913345c7758/FLAG9f7b2210c [2018-10-26 21:14:47,592 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/67f3182e0/20cef3c675504c339496a913345c7758 [2018-10-26 21:14:47,604 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 21:14:47,606 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 21:14:47,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 21:14:47,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 21:14:47,613 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 21:14:47,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:14:47" (1/1) ... [2018-10-26 21:14:47,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8de4687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:47, skipping insertion in model container [2018-10-26 21:14:47,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:14:47" (1/1) ... [2018-10-26 21:14:47,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 21:14:47,795 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 21:14:49,166 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:14:49,174 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 21:14:49,766 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:14:49,802 INFO L193 MainTranslator]: Completed translation [2018-10-26 21:14:49,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:49 WrapperNode [2018-10-26 21:14:49,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 21:14:49,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 21:14:49,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 21:14:49,804 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 21:14:49,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:49" (1/1) ... [2018-10-26 21:14:49,884 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:49" (1/1) ... [2018-10-26 21:14:50,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 21:14:50,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 21:14:50,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 21:14:50,479 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 21:14:50,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:49" (1/1) ... [2018-10-26 21:14:50,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:49" (1/1) ... [2018-10-26 21:14:50,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:49" (1/1) ... [2018-10-26 21:14:50,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:49" (1/1) ... [2018-10-26 21:14:50,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:49" (1/1) ... [2018-10-26 21:14:50,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:49" (1/1) ... [2018-10-26 21:14:50,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:49" (1/1) ... [2018-10-26 21:14:50,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 21:14:50,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 21:14:50,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 21:14:50,765 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 21:14:50,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 21:14:50,839 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-26 21:14:50,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 21:14:50,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 21:15:00,133 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 21:15:00,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:15:00 BoogieIcfgContainer [2018-10-26 21:15:00,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 21:15:00,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 21:15:00,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 21:15:00,138 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 21:15:00,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:14:47" (1/3) ... [2018-10-26 21:15:00,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9fcea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:15:00, skipping insertion in model container [2018-10-26 21:15:00,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:49" (2/3) ... [2018-10-26 21:15:00,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9fcea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:15:00, skipping insertion in model container [2018-10-26 21:15:00,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:15:00" (3/3) ... [2018-10-26 21:15:00,142 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label09_true-unreach-call.c [2018-10-26 21:15:00,152 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 21:15:00,162 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 21:15:00,180 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 21:15:00,222 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 21:15:00,223 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 21:15:00,223 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 21:15:00,223 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 21:15:00,224 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 21:15:00,224 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 21:15:00,224 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 21:15:00,224 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 21:15:00,224 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 21:15:00,258 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states. [2018-10-26 21:15:00,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-26 21:15:00,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:15:00,271 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:15:00,273 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:15:00,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:15:00,279 INFO L82 PathProgramCache]: Analyzing trace with hash -757100326, now seen corresponding path program 1 times [2018-10-26 21:15:00,281 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:15:00,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:15:00,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:15:00,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:15:00,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:15:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:15:00,855 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-26 21:15:01,433 WARN L179 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2018-10-26 21:15:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:15:01,698 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:15:01,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 21:15:01,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 21:15:01,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 21:15:01,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-26 21:15:01,720 INFO L87 Difference]: Start difference. First operand 819 states. Second operand 6 states. [2018-10-26 21:15:01,934 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-10-26 21:15:18,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:15:18,788 INFO L93 Difference]: Finished difference Result 3901 states and 7636 transitions. [2018-10-26 21:15:18,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:15:18,791 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2018-10-26 21:15:18,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:15:18,840 INFO L225 Difference]: With dead ends: 3901 [2018-10-26 21:15:18,840 INFO L226 Difference]: Without dead ends: 3072 [2018-10-26 21:15:18,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-26 21:15:18,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2018-10-26 21:15:19,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 3072. [2018-10-26 21:15:19,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3072 states. [2018-10-26 21:15:19,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3072 states to 3072 states and 5067 transitions. [2018-10-26 21:15:19,035 INFO L78 Accepts]: Start accepts. Automaton has 3072 states and 5067 transitions. Word has length 67 [2018-10-26 21:15:19,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:15:19,036 INFO L481 AbstractCegarLoop]: Abstraction has 3072 states and 5067 transitions. [2018-10-26 21:15:19,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 21:15:19,036 INFO L276 IsEmpty]: Start isEmpty. Operand 3072 states and 5067 transitions. [2018-10-26 21:15:19,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-26 21:15:19,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:15:19,048 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:15:19,049 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:15:19,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:15:19,049 INFO L82 PathProgramCache]: Analyzing trace with hash 2087852650, now seen corresponding path program 1 times [2018-10-26 21:15:19,049 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:15:19,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:15:19,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:15:19,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:15:19,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:15:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:15:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 59 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:15:19,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:15:19,578 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 21:15:19,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:15:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:15:19,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:15:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:15:19,772 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:15:19,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-26 21:15:19,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 21:15:19,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 21:15:19,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-26 21:15:19,775 INFO L87 Difference]: Start difference. First operand 3072 states and 5067 transitions. Second operand 7 states. [2018-10-26 21:15:51,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:15:51,142 INFO L93 Difference]: Finished difference Result 20462 states and 37421 transitions. [2018-10-26 21:15:51,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 21:15:51,143 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 139 [2018-10-26 21:15:51,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:15:51,218 INFO L225 Difference]: With dead ends: 20462 [2018-10-26 21:15:51,218 INFO L226 Difference]: Without dead ends: 15133 [2018-10-26 21:15:51,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:15:51,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15133 states. [2018-10-26 21:15:51,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15133 to 7583. [2018-10-26 21:15:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7583 states. [2018-10-26 21:15:51,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7583 states to 7583 states and 9797 transitions. [2018-10-26 21:15:51,423 INFO L78 Accepts]: Start accepts. Automaton has 7583 states and 9797 transitions. Word has length 139 [2018-10-26 21:15:51,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:15:51,424 INFO L481 AbstractCegarLoop]: Abstraction has 7583 states and 9797 transitions. [2018-10-26 21:15:51,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 21:15:51,424 INFO L276 IsEmpty]: Start isEmpty. Operand 7583 states and 9797 transitions. [2018-10-26 21:15:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-26 21:15:51,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:15:51,434 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:15:51,435 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:15:51,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:15:51,435 INFO L82 PathProgramCache]: Analyzing trace with hash 2054372, now seen corresponding path program 1 times [2018-10-26 21:15:51,435 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:15:51,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:15:51,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:15:51,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:15:51,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:15:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:15:51,853 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-26 21:15:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 180 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-26 21:15:52,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:15:52,150 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 21:15:52,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:15:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:15:52,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:15:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-26 21:15:52,546 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:15:52,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2018-10-26 21:15:52,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 21:15:52,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 21:15:52,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-26 21:15:52,554 INFO L87 Difference]: Start difference. First operand 7583 states and 9797 transitions. Second operand 7 states. [2018-10-26 21:16:05,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:16:05,333 INFO L93 Difference]: Finished difference Result 28701 states and 37293 transitions. [2018-10-26 21:16:05,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 21:16:05,338 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 279 [2018-10-26 21:16:05,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:16:05,426 INFO L225 Difference]: With dead ends: 28701 [2018-10-26 21:16:05,426 INFO L226 Difference]: Without dead ends: 21120 [2018-10-26 21:16:05,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 279 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-10-26 21:16:05,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21120 states. [2018-10-26 21:16:05,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21120 to 21120. [2018-10-26 21:16:05,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21120 states. [2018-10-26 21:16:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21120 states to 21120 states and 24054 transitions. [2018-10-26 21:16:05,810 INFO L78 Accepts]: Start accepts. Automaton has 21120 states and 24054 transitions. Word has length 279 [2018-10-26 21:16:05,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:16:05,811 INFO L481 AbstractCegarLoop]: Abstraction has 21120 states and 24054 transitions. [2018-10-26 21:16:05,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 21:16:05,812 INFO L276 IsEmpty]: Start isEmpty. Operand 21120 states and 24054 transitions. [2018-10-26 21:16:05,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-26 21:16:05,820 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:16:05,821 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:16:05,821 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:16:05,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:16:05,821 INFO L82 PathProgramCache]: Analyzing trace with hash -220240638, now seen corresponding path program 1 times [2018-10-26 21:16:05,822 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:16:05,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:16:05,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:05,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:16:05,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:16:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 129 proven. 4 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-26 21:16:06,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:16:06,244 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 21:16:06,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:16:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:16:06,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:16:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:16:06,435 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:16:06,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-26 21:16:06,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:16:06,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:16:06,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:16:06,437 INFO L87 Difference]: Start difference. First operand 21120 states and 24054 transitions. Second operand 4 states. [2018-10-26 21:16:15,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:16:15,612 INFO L93 Difference]: Finished difference Result 69371 states and 80694 transitions. [2018-10-26 21:16:15,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:16:15,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 291 [2018-10-26 21:16:15,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:16:15,981 INFO L225 Difference]: With dead ends: 69371 [2018-10-26 21:16:15,981 INFO L226 Difference]: Without dead ends: 49005 [2018-10-26 21:16:16,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:16:16,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49005 states. [2018-10-26 21:16:16,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49005 to 30144. [2018-10-26 21:16:16,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30144 states. [2018-10-26 21:16:16,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30144 states to 30144 states and 34300 transitions. [2018-10-26 21:16:16,470 INFO L78 Accepts]: Start accepts. Automaton has 30144 states and 34300 transitions. Word has length 291 [2018-10-26 21:16:16,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:16:16,471 INFO L481 AbstractCegarLoop]: Abstraction has 30144 states and 34300 transitions. [2018-10-26 21:16:16,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:16:16,471 INFO L276 IsEmpty]: Start isEmpty. Operand 30144 states and 34300 transitions. [2018-10-26 21:16:16,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-26 21:16:16,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:16:16,485 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:16:16,485 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:16:16,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:16:16,486 INFO L82 PathProgramCache]: Analyzing trace with hash 44678380, now seen corresponding path program 1 times [2018-10-26 21:16:16,486 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:16:16,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:16:16,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:16,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:16:16,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:16:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-10-26 21:16:17,044 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:16:17,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:16:17,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:16:17,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:16:17,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:16:17,048 INFO L87 Difference]: Start difference. First operand 30144 states and 34300 transitions. Second operand 4 states. [2018-10-26 21:16:26,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:16:26,345 INFO L93 Difference]: Finished difference Result 71566 states and 82345 transitions. [2018-10-26 21:16:26,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:16:26,346 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 399 [2018-10-26 21:16:26,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:16:26,410 INFO L225 Difference]: With dead ends: 71566 [2018-10-26 21:16:26,410 INFO L226 Difference]: Without dead ends: 42176 [2018-10-26 21:16:26,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:16:26,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42176 states. [2018-10-26 21:16:26,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42176 to 42176. [2018-10-26 21:16:26,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42176 states. [2018-10-26 21:16:26,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42176 states to 42176 states and 47577 transitions. [2018-10-26 21:16:26,943 INFO L78 Accepts]: Start accepts. Automaton has 42176 states and 47577 transitions. Word has length 399 [2018-10-26 21:16:26,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:16:26,944 INFO L481 AbstractCegarLoop]: Abstraction has 42176 states and 47577 transitions. [2018-10-26 21:16:26,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:16:26,944 INFO L276 IsEmpty]: Start isEmpty. Operand 42176 states and 47577 transitions. [2018-10-26 21:16:26,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2018-10-26 21:16:26,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:16:26,963 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:16:26,963 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:16:26,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:16:26,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1687742139, now seen corresponding path program 1 times [2018-10-26 21:16:26,964 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:16:26,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:16:26,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:26,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:16:26,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:16:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 389 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-26 21:16:27,921 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:16:27,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:16:27,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:16:27,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:16:27,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:16:27,922 INFO L87 Difference]: Start difference. First operand 42176 states and 47577 transitions. Second operand 4 states. [2018-10-26 21:16:38,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:16:38,289 INFO L93 Difference]: Finished difference Result 102398 states and 115192 transitions. [2018-10-26 21:16:38,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:16:38,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 409 [2018-10-26 21:16:38,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:16:38,357 INFO L225 Difference]: With dead ends: 102398 [2018-10-26 21:16:38,357 INFO L226 Difference]: Without dead ends: 60223 [2018-10-26 21:16:38,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:16:38,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60223 states. [2018-10-26 21:16:38,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60223 to 60223. [2018-10-26 21:16:38,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60223 states. [2018-10-26 21:16:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60223 states to 60223 states and 64544 transitions. [2018-10-26 21:16:39,046 INFO L78 Accepts]: Start accepts. Automaton has 60223 states and 64544 transitions. Word has length 409 [2018-10-26 21:16:39,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:16:39,047 INFO L481 AbstractCegarLoop]: Abstraction has 60223 states and 64544 transitions. [2018-10-26 21:16:39,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:16:39,047 INFO L276 IsEmpty]: Start isEmpty. Operand 60223 states and 64544 transitions. [2018-10-26 21:16:39,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2018-10-26 21:16:39,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:16:39,071 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:16:39,072 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:16:39,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:16:39,072 INFO L82 PathProgramCache]: Analyzing trace with hash -369277302, now seen corresponding path program 1 times [2018-10-26 21:16:39,072 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:16:39,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:16:39,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:39,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:16:39,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:16:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 566 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-10-26 21:16:39,872 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:16:39,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:16:39,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 21:16:39,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 21:16:39,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:16:39,874 INFO L87 Difference]: Start difference. First operand 60223 states and 64544 transitions. Second operand 3 states. [2018-10-26 21:16:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:16:44,512 INFO L93 Difference]: Finished difference Result 133228 states and 143498 transitions. [2018-10-26 21:16:44,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:16:44,512 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 451 [2018-10-26 21:16:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:16:44,611 INFO L225 Difference]: With dead ends: 133228 [2018-10-26 21:16:44,611 INFO L226 Difference]: Without dead ends: 73759 [2018-10-26 21:16:44,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:16:44,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73759 states. [2018-10-26 21:16:45,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73759 to 73007. [2018-10-26 21:16:45,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73007 states. [2018-10-26 21:16:45,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73007 states to 73007 states and 77211 transitions. [2018-10-26 21:16:45,370 INFO L78 Accepts]: Start accepts. Automaton has 73007 states and 77211 transitions. Word has length 451 [2018-10-26 21:16:45,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:16:45,370 INFO L481 AbstractCegarLoop]: Abstraction has 73007 states and 77211 transitions. [2018-10-26 21:16:45,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 21:16:45,371 INFO L276 IsEmpty]: Start isEmpty. Operand 73007 states and 77211 transitions. [2018-10-26 21:16:45,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2018-10-26 21:16:45,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:16:45,393 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:16:45,393 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:16:45,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:16:45,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1068466992, now seen corresponding path program 1 times [2018-10-26 21:16:45,394 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:16:45,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:16:45,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:45,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:16:45,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:16:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2018-10-26 21:16:45,970 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:16:45,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:16:45,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:16:45,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:16:45,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:16:45,972 INFO L87 Difference]: Start difference. First operand 73007 states and 77211 transitions. Second operand 4 states. [2018-10-26 21:16:54,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:16:54,307 INFO L93 Difference]: Finished difference Result 146012 states and 154425 transitions. [2018-10-26 21:16:54,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:16:54,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2018-10-26 21:16:54,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:16:54,374 INFO L225 Difference]: With dead ends: 146012 [2018-10-26 21:16:54,374 INFO L226 Difference]: Without dead ends: 73759 [2018-10-26 21:16:54,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:16:54,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73759 states. [2018-10-26 21:16:54,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73759 to 73007. [2018-10-26 21:16:54,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73007 states. [2018-10-26 21:16:55,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73007 states to 73007 states and 76813 transitions. [2018-10-26 21:16:55,006 INFO L78 Accepts]: Start accepts. Automaton has 73007 states and 76813 transitions. Word has length 479 [2018-10-26 21:16:55,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:16:55,007 INFO L481 AbstractCegarLoop]: Abstraction has 73007 states and 76813 transitions. [2018-10-26 21:16:55,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:16:55,007 INFO L276 IsEmpty]: Start isEmpty. Operand 73007 states and 76813 transitions. [2018-10-26 21:16:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2018-10-26 21:16:55,026 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:16:55,027 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:16:55,027 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:16:55,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:16:55,027 INFO L82 PathProgramCache]: Analyzing trace with hash 686703586, now seen corresponding path program 1 times [2018-10-26 21:16:55,028 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:16:55,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:16:55,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:55,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:16:55,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:16:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:16:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 558 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-10-26 21:16:55,462 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:16:55,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:16:55,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:16:55,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:16:55,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:16:55,464 INFO L87 Difference]: Start difference. First operand 73007 states and 76813 transitions. Second operand 4 states. [2018-10-26 21:17:03,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:17:03,075 INFO L93 Difference]: Finished difference Result 154284 states and 162904 transitions. [2018-10-26 21:17:03,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:17:03,080 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 563 [2018-10-26 21:17:03,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:17:03,159 INFO L225 Difference]: With dead ends: 154284 [2018-10-26 21:17:03,159 INFO L226 Difference]: Without dead ends: 82031 [2018-10-26 21:17:03,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:17:03,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82031 states. [2018-10-26 21:17:03,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82031 to 81279. [2018-10-26 21:17:03,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81279 states. [2018-10-26 21:17:03,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81279 states to 81279 states and 85349 transitions. [2018-10-26 21:17:03,931 INFO L78 Accepts]: Start accepts. Automaton has 81279 states and 85349 transitions. Word has length 563 [2018-10-26 21:17:03,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:17:03,932 INFO L481 AbstractCegarLoop]: Abstraction has 81279 states and 85349 transitions. [2018-10-26 21:17:03,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:17:03,932 INFO L276 IsEmpty]: Start isEmpty. Operand 81279 states and 85349 transitions. [2018-10-26 21:17:03,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2018-10-26 21:17:03,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:17:03,959 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:17:03,960 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:17:03,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:17:03,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1045696149, now seen corresponding path program 1 times [2018-10-26 21:17:03,960 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:17:03,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:17:03,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:17:03,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:17:03,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:17:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:17:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 751 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-10-26 21:17:04,377 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:17:04,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:17:04,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:17:04,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:17:04,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:17:04,378 INFO L87 Difference]: Start difference. First operand 81279 states and 85349 transitions. Second operand 4 states. [2018-10-26 21:17:13,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:17:13,426 INFO L93 Difference]: Finished difference Result 162556 states and 170739 transitions. [2018-10-26 21:17:13,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:17:13,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 574 [2018-10-26 21:17:13,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:17:13,506 INFO L225 Difference]: With dead ends: 162556 [2018-10-26 21:17:13,506 INFO L226 Difference]: Without dead ends: 82031 [2018-10-26 21:17:13,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:17:13,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82031 states. [2018-10-26 21:17:14,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82031 to 79775. [2018-10-26 21:17:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79775 states. [2018-10-26 21:17:14,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79775 states to 79775 states and 82869 transitions. [2018-10-26 21:17:14,136 INFO L78 Accepts]: Start accepts. Automaton has 79775 states and 82869 transitions. Word has length 574 [2018-10-26 21:17:14,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:17:14,137 INFO L481 AbstractCegarLoop]: Abstraction has 79775 states and 82869 transitions. [2018-10-26 21:17:14,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:17:14,137 INFO L276 IsEmpty]: Start isEmpty. Operand 79775 states and 82869 transitions. [2018-10-26 21:17:14,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2018-10-26 21:17:14,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:17:14,153 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:17:14,153 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:17:14,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:17:14,154 INFO L82 PathProgramCache]: Analyzing trace with hash -266169991, now seen corresponding path program 1 times [2018-10-26 21:17:14,154 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:17:14,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:17:14,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:17:14,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:17:14,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:17:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:17:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2018-10-26 21:17:14,680 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:17:14,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:17:14,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 21:17:14,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 21:17:14,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:17:14,681 INFO L87 Difference]: Start difference. First operand 79775 states and 82869 transitions. Second operand 3 states. [2018-10-26 21:17:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:17:19,773 INFO L93 Difference]: Finished difference Result 159544 states and 165901 transitions. [2018-10-26 21:17:19,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:17:19,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 649 [2018-10-26 21:17:19,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:17:19,858 INFO L225 Difference]: With dead ends: 159544 [2018-10-26 21:17:19,858 INFO L226 Difference]: Without dead ends: 80523 [2018-10-26 21:17:19,898 INFO L605 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 [2018-10-26 21:17:19,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80523 states. [2018-10-26 21:17:20,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80523 to 80523. [2018-10-26 21:17:20,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80523 states. [2018-10-26 21:17:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80523 states to 80523 states and 83241 transitions. [2018-10-26 21:17:20,947 INFO L78 Accepts]: Start accepts. Automaton has 80523 states and 83241 transitions. Word has length 649 [2018-10-26 21:17:20,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:17:20,947 INFO L481 AbstractCegarLoop]: Abstraction has 80523 states and 83241 transitions. [2018-10-26 21:17:20,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 21:17:20,947 INFO L276 IsEmpty]: Start isEmpty. Operand 80523 states and 83241 transitions. [2018-10-26 21:17:20,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 976 [2018-10-26 21:17:20,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:17:20,991 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:17:20,991 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:17:20,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:17:20,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1175089573, now seen corresponding path program 1 times [2018-10-26 21:17:20,991 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:17:20,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:17:20,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:17:20,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:17:20,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:17:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:17:21,916 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-26 21:17:22,228 WARN L179 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-10-26 21:17:22,627 WARN L179 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-10-26 21:17:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 691 proven. 5 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-10-26 21:17:25,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:17:25,414 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 21:17:25,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:17:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:17:25,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:17:25,990 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 21:17:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 631 proven. 65 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-10-26 21:17:27,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:17:27,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 11 [2018-10-26 21:17:27,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 21:17:27,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 21:17:27,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-10-26 21:17:27,785 INFO L87 Difference]: Start difference. First operand 80523 states and 83241 transitions. Second operand 11 states. [2018-10-26 21:17:54,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:17:54,251 INFO L93 Difference]: Finished difference Result 261305 states and 270643 transitions. [2018-10-26 21:17:54,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-26 21:17:54,252 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 975 [2018-10-26 21:17:54,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:17:54,431 INFO L225 Difference]: With dead ends: 261305 [2018-10-26 21:17:54,431 INFO L226 Difference]: Without dead ends: 178524 [2018-10-26 21:17:54,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 994 GetRequests, 978 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2018-10-26 21:17:54,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178524 states. [2018-10-26 21:17:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178524 to 124108. [2018-10-26 21:17:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124108 states. [2018-10-26 21:17:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124108 states to 124108 states and 128129 transitions. [2018-10-26 21:17:55,987 INFO L78 Accepts]: Start accepts. Automaton has 124108 states and 128129 transitions. Word has length 975 [2018-10-26 21:17:55,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:17:55,989 INFO L481 AbstractCegarLoop]: Abstraction has 124108 states and 128129 transitions. [2018-10-26 21:17:55,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 21:17:55,989 INFO L276 IsEmpty]: Start isEmpty. Operand 124108 states and 128129 transitions. [2018-10-26 21:17:56,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1036 [2018-10-26 21:17:56,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:17:56,067 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:17:56,067 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:17:56,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:17:56,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1200302459, now seen corresponding path program 1 times [2018-10-26 21:17:56,069 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:17:56,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:17:56,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:17:56,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:17:56,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:17:56,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:17:56,917 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-26 21:17:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 720 proven. 239 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-26 21:17:58,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:17:58,320 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-26 21:17:58,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:17:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:17:58,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:17:59,393 WARN L179 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 22 [2018-10-26 21:18:00,237 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 37 [2018-10-26 21:18:04,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 669 proven. 290 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-26 21:18:04,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:18:04,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2018-10-26 21:18:04,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 21:18:04,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 21:18:04,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-10-26 21:18:04,719 INFO L87 Difference]: Start difference. First operand 124108 states and 128129 transitions. Second operand 13 states. Received shutdown request... [2018-10-26 21:18:40,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-26 21:18:40,662 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 21:18:40,668 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 21:18:40,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 09:18:40 BoogieIcfgContainer [2018-10-26 21:18:40,669 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 21:18:40,670 INFO L168 Benchmark]: Toolchain (without parser) took 233064.85 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 3.1 GB in the end (delta: -1.7 GB). Peak memory consumption was 598.8 MB. Max. memory is 7.1 GB. [2018-10-26 21:18:40,671 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. [2018-10-26 21:18:40,671 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2195.54 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. [2018-10-26 21:18:40,672 INFO L168 Benchmark]: Boogie Procedure Inliner took 675.03 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 785.4 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -975.5 MB). Peak memory consumption was 58.2 MB. Max. memory is 7.1 GB. [2018-10-26 21:18:40,673 INFO L168 Benchmark]: Boogie Preprocessor took 285.18 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 37.0 MB). Peak memory consumption was 37.0 MB. Max. memory is 7.1 GB. [2018-10-26 21:18:40,674 INFO L168 Benchmark]: RCFGBuilder took 9369.42 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 245.4 MB). Free memory was 2.1 GB in the beginning and 2.4 GB in the end (delta: -218.4 MB). Peak memory consumption was 662.4 MB. Max. memory is 7.1 GB. [2018-10-26 21:18:40,674 INFO L168 Benchmark]: TraceAbstraction took 220534.23 ms. Allocated memory was 2.6 GB in the beginning and 3.8 GB in the end (delta: 1.2 GB). Free memory was 2.4 GB in the beginning and 3.1 GB in the end (delta: -715.8 MB). Peak memory consumption was 524.2 MB. Max. memory is 7.1 GB. [2018-10-26 21:18:40,680 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 2195.54 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 675.03 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 785.4 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -975.5 MB). Peak memory consumption was 58.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 285.18 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 37.0 MB). Peak memory consumption was 37.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9369.42 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 245.4 MB). Free memory was 2.1 GB in the beginning and 2.4 GB in the end (delta: -218.4 MB). Peak memory consumption was 662.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 220534.23 ms. Allocated memory was 2.6 GB in the beginning and 3.8 GB in the end (delta: 1.2 GB). Free memory was 2.4 GB in the beginning and 3.1 GB in the end (delta: -715.8 MB). Peak memory consumption was 524.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 210]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 210). Cancelled while BasicCegarLoop was constructing difference of abstraction (124108states) and FLOYD_HOARE automaton (currently 36 states, 13 states before enhancement),while ReachableStatesComputation was computing reachable states (55206 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 819 locations, 1 error locations. TIMEOUT Result, 220.4s OverallTime, 13 OverallIterations, 5 TraceHistogramMax, 188.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 8031 SDtfs, 41369 SDslu, 1862 SDs, 0 SdLazy, 107892 SolverSat, 14930 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 154.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2876 GetRequests, 2768 SyntacticMatches, 16 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 7.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124108occurred in iteration=12, 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: 7.5s AutomataMinimizationTime, 12 MinimizatonAttempts, 85339 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 15.6s InterpolantComputationTime, 9029 NumberOfCodeBlocks, 9029 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 9011 ConstructedInterpolants, 544 QuantifiedInterpolants, 46370654 SizeOfPredicates, 12 NumberOfNonLiveVariables, 3272 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 18 InterpolantComputations, 11 PerfectInterpolantSequences, 9871/10483 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown