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_label41_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 20:10:47,973 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 20:10:47,975 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 20:10:47,990 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 20:10:47,991 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 20:10:47,992 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 20:10:47,995 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 20:10:47,997 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 20:10:47,998 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 20:10:47,999 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 20:10:48,000 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 20:10:48,001 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 20:10:48,002 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 20:10:48,003 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 20:10:48,004 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 20:10:48,005 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 20:10:48,006 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 20:10:48,008 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 20:10:48,013 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 20:10:48,018 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 20:10:48,019 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 20:10:48,022 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 20:10:48,025 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 20:10:48,026 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 20:10:48,027 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 20:10:48,029 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 20:10:48,031 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 20:10:48,032 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 20:10:48,033 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 20:10:48,036 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 20:10:48,036 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 20:10:48,037 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-23 20:10:48,037 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-23 20:10:48,037 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-23 20:10:48,038 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-23 20:10:48,039 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-23 20:10:48,039 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 [2018-10-23 20:10:48,063 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 20:10:48,063 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 20:10:48,064 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 20:10:48,064 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 20:10:48,065 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 20:10:48,065 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 20:10:48,065 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 20:10:48,067 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 20:10:48,067 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 20:10:48,067 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 20:10:48,067 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 20:10:48,068 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 20:10:48,068 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 20:10:48,068 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 20:10:48,068 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 20:10:48,068 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 20:10:48,069 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 20:10:48,069 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 20:10:48,069 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 20:10:48,069 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:10:48,069 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 20:10:48,070 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 20:10:48,070 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 20:10:48,070 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 20:10:48,070 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 20:10:48,070 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 20:10:48,070 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 20:10:48,071 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 20:10:48,117 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 20:10:48,136 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 20:10:48,140 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 20:10:48,142 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 20:10:48,142 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 20:10:48,143 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label41_true-unreach-call.c [2018-10-23 20:10:48,210 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4d5cc94f7/06b74db7cefb4671b0ed11b59ac6cdc8/FLAG94fdb8136 [2018-10-23 20:10:48,997 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 20:10:48,998 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label41_true-unreach-call.c [2018-10-23 20:10:49,039 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4d5cc94f7/06b74db7cefb4671b0ed11b59ac6cdc8/FLAG94fdb8136 [2018-10-23 20:10:49,064 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4d5cc94f7/06b74db7cefb4671b0ed11b59ac6cdc8 [2018-10-23 20:10:49,077 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 20:10:49,079 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 20:10:49,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 20:10:49,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 20:10:49,087 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 20:10:49,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:10:49" (1/1) ... [2018-10-23 20:10:49,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1276bf54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:10:49, skipping insertion in model container [2018-10-23 20:10:49,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:10:49" (1/1) ... [2018-10-23 20:10:49,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 20:10:49,284 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 20:10:50,661 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:10:50,666 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 20:10:51,310 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:10:51,343 INFO L193 MainTranslator]: Completed translation [2018-10-23 20:10:51,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:10:51 WrapperNode [2018-10-23 20:10:51,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 20:10:51,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 20:10:51,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 20:10:51,346 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 20:10:51,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:10:51" (1/1) ... [2018-10-23 20:10:51,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:10:51" (1/1) ... [2018-10-23 20:10:51,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 20:10:51,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 20:10:51,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 20:10:51,969 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 20:10:51,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:10:51" (1/1) ... [2018-10-23 20:10:51,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:10:51" (1/1) ... [2018-10-23 20:10:52,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:10:51" (1/1) ... [2018-10-23 20:10:52,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:10:51" (1/1) ... [2018-10-23 20:10:52,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:10:51" (1/1) ... [2018-10-23 20:10:52,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:10:51" (1/1) ... [2018-10-23 20:10:52,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:10:51" (1/1) ... [2018-10-23 20:10:52,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 20:10:52,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 20:10:52,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 20:10:52,295 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 20:10:52,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:10:51" (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 [2018-10-23 20:10:52,363 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 20:10:52,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 20:10:52,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 20:11:00,871 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 20:11:00,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:11:00 BoogieIcfgContainer [2018-10-23 20:11:00,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 20:11:00,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 20:11:00,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 20:11:00,876 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 20:11:00,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:10:49" (1/3) ... [2018-10-23 20:11:00,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa96a32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:11:00, skipping insertion in model container [2018-10-23 20:11:00,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:10:51" (2/3) ... [2018-10-23 20:11:00,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa96a32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:11:00, skipping insertion in model container [2018-10-23 20:11:00,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:11:00" (3/3) ... [2018-10-23 20:11:00,881 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label41_true-unreach-call.c [2018-10-23 20:11:00,891 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 20:11:00,900 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 20:11:00,918 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 20:11:00,969 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 20:11:00,970 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 20:11:00,970 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 20:11:00,970 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 20:11:00,970 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 20:11:00,970 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 20:11:00,971 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 20:11:00,971 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 20:11:00,971 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 20:11:01,013 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states. [2018-10-23 20:11:01,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-23 20:11:01,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:11:01,024 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] [2018-10-23 20:11:01,026 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:11:01,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:11:01,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1884671582, now seen corresponding path program 1 times [2018-10-23 20:11:01,033 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:11:01,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:11:01,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:11:01,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:11:01,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:11:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:11:01,552 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-10-23 20:11:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:11:01,570 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:11:01,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:11:01,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:11:01,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:11:01,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:11:01,595 INFO L87 Difference]: Start difference. First operand 819 states. Second operand 4 states. [2018-10-23 20:11:15,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:11:15,201 INFO L93 Difference]: Finished difference Result 3162 states and 6150 transitions. [2018-10-23 20:11:15,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:11:15,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2018-10-23 20:11:15,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:11:15,249 INFO L225 Difference]: With dead ends: 3162 [2018-10-23 20:11:15,249 INFO L226 Difference]: Without dead ends: 2336 [2018-10-23 20:11:15,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:11:15,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2018-10-23 20:11:15,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2336. [2018-10-23 20:11:15,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2336 states. [2018-10-23 20:11:15,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 3769 transitions. [2018-10-23 20:11:15,438 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 3769 transitions. Word has length 53 [2018-10-23 20:11:15,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:11:15,439 INFO L481 AbstractCegarLoop]: Abstraction has 2336 states and 3769 transitions. [2018-10-23 20:11:15,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:11:15,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 3769 transitions. [2018-10-23 20:11:15,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-23 20:11:15,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:11:15,448 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:11:15,450 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:11:15,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:11:15,451 INFO L82 PathProgramCache]: Analyzing trace with hash -455382204, now seen corresponding path program 1 times [2018-10-23 20:11:15,451 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:11:15,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:11:15,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:11:15,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:11:15,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:11:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:11:16,101 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2018-10-23 20:11:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:11:16,308 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:11:16,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 20:11:16,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 20:11:16,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 20:11:16,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:11:16,311 INFO L87 Difference]: Start difference. First operand 2336 states and 3769 transitions. Second operand 6 states. [2018-10-23 20:11:34,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:11:34,859 INFO L93 Difference]: Finished difference Result 9183 states and 14416 transitions. [2018-10-23 20:11:34,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:11:34,859 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2018-10-23 20:11:34,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:11:34,897 INFO L225 Difference]: With dead ends: 9183 [2018-10-23 20:11:34,897 INFO L226 Difference]: Without dead ends: 6849 [2018-10-23 20:11:34,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:11:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6849 states. [2018-10-23 20:11:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6849 to 6849. [2018-10-23 20:11:35,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6849 states. [2018-10-23 20:11:35,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6849 states to 6849 states and 9754 transitions. [2018-10-23 20:11:35,058 INFO L78 Accepts]: Start accepts. Automaton has 6849 states and 9754 transitions. Word has length 130 [2018-10-23 20:11:35,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:11:35,059 INFO L481 AbstractCegarLoop]: Abstraction has 6849 states and 9754 transitions. [2018-10-23 20:11:35,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 20:11:35,059 INFO L276 IsEmpty]: Start isEmpty. Operand 6849 states and 9754 transitions. [2018-10-23 20:11:35,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-23 20:11:35,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:11:35,067 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, 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] [2018-10-23 20:11:35,067 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:11:35,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:11:35,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1535905281, now seen corresponding path program 1 times [2018-10-23 20:11:35,068 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:11:35,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:11:35,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:11:35,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:11:35,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:11:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:11:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 151 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-10-23 20:11:35,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:11:35,696 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 [2018-10-23 20:11:35,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:11:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:11:35,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:11:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:11:35,989 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:11:35,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-23 20:11:35,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 20:11:35,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 20:11:35,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:11:35,991 INFO L87 Difference]: Start difference. First operand 6849 states and 9754 transitions. Second operand 7 states. [2018-10-23 20:11:57,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:11:57,688 INFO L93 Difference]: Finished difference Result 28768 states and 40519 transitions. [2018-10-23 20:11:57,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 20:11:57,689 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 232 [2018-10-23 20:11:57,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:11:57,779 INFO L225 Difference]: With dead ends: 28768 [2018-10-23 20:11:57,780 INFO L226 Difference]: Without dead ends: 21168 [2018-10-23 20:11:57,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 233 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-23 20:11:57,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21168 states. [2018-10-23 20:11:58,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21168 to 17391. [2018-10-23 20:11:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17391 states. [2018-10-23 20:11:58,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17391 states to 17391 states and 21988 transitions. [2018-10-23 20:11:58,392 INFO L78 Accepts]: Start accepts. Automaton has 17391 states and 21988 transitions. Word has length 232 [2018-10-23 20:11:58,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:11:58,393 INFO L481 AbstractCegarLoop]: Abstraction has 17391 states and 21988 transitions. [2018-10-23 20:11:58,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 20:11:58,393 INFO L276 IsEmpty]: Start isEmpty. Operand 17391 states and 21988 transitions. [2018-10-23 20:11:58,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-10-23 20:11:58,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:11:58,403 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:11:58,403 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:11:58,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:11:58,404 INFO L82 PathProgramCache]: Analyzing trace with hash 603282787, now seen corresponding path program 1 times [2018-10-23 20:11:58,404 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:11:58,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:11:58,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:11:58,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:11:58,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:11:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:11:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:11:58,825 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:11:58,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:11:58,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:11:58,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:11:58,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:11:58,827 INFO L87 Difference]: Start difference. First operand 17391 states and 21988 transitions. Second operand 4 states. [2018-10-23 20:12:08,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:12:08,040 INFO L93 Difference]: Finished difference Result 58844 states and 76150 transitions. [2018-10-23 20:12:08,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:12:08,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 287 [2018-10-23 20:12:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:12:08,128 INFO L225 Difference]: With dead ends: 58844 [2018-10-23 20:12:08,129 INFO L226 Difference]: Without dead ends: 41455 [2018-10-23 20:12:08,159 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 [2018-10-23 20:12:08,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41455 states. [2018-10-23 20:12:09,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41455 to 41455. [2018-10-23 20:12:09,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41455 states. [2018-10-23 20:12:09,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41455 states to 41455 states and 52515 transitions. [2018-10-23 20:12:09,151 INFO L78 Accepts]: Start accepts. Automaton has 41455 states and 52515 transitions. Word has length 287 [2018-10-23 20:12:09,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:12:09,152 INFO L481 AbstractCegarLoop]: Abstraction has 41455 states and 52515 transitions. [2018-10-23 20:12:09,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:12:09,152 INFO L276 IsEmpty]: Start isEmpty. Operand 41455 states and 52515 transitions. [2018-10-23 20:12:09,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-10-23 20:12:09,162 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:12:09,162 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:12:09,162 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:12:09,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:12:09,163 INFO L82 PathProgramCache]: Analyzing trace with hash -673880654, now seen corresponding path program 1 times [2018-10-23 20:12:09,164 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:12:09,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:12:09,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:12:09,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:12:09,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:12:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:12:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 101 proven. 7 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-10-23 20:12:09,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:12:09,603 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 [2018-10-23 20:12:09,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:12:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:12:09,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:12:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-10-23 20:12:09,895 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:12:09,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2018-10-23 20:12:09,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:12:09,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:12:09,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:12:09,897 INFO L87 Difference]: Start difference. First operand 41455 states and 52515 transitions. Second operand 5 states. [2018-10-23 20:12:25,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:12:25,047 INFO L93 Difference]: Finished difference Result 162620 states and 207997 transitions. [2018-10-23 20:12:25,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:12:25,048 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 293 [2018-10-23 20:12:25,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:12:25,253 INFO L225 Difference]: With dead ends: 162620 [2018-10-23 20:12:25,254 INFO L226 Difference]: Without dead ends: 120414 [2018-10-23 20:12:25,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:12:25,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120414 states. [2018-10-23 20:12:26,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120414 to 97824. [2018-10-23 20:12:26,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97824 states. [2018-10-23 20:12:26,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97824 states to 97824 states and 109991 transitions. [2018-10-23 20:12:26,464 INFO L78 Accepts]: Start accepts. Automaton has 97824 states and 109991 transitions. Word has length 293 [2018-10-23 20:12:26,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:12:26,465 INFO L481 AbstractCegarLoop]: Abstraction has 97824 states and 109991 transitions. [2018-10-23 20:12:26,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:12:26,466 INFO L276 IsEmpty]: Start isEmpty. Operand 97824 states and 109991 transitions. [2018-10-23 20:12:26,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-10-23 20:12:26,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:12:26,476 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, 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, 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] [2018-10-23 20:12:26,476 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:12:26,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:12:26,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1940907995, now seen corresponding path program 1 times [2018-10-23 20:12:26,477 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:12:26,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:12:26,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:12:26,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:12:26,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:12:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:12:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-10-23 20:12:26,929 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:12:26,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:12:26,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:12:26,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:12:26,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:12:26,930 INFO L87 Difference]: Start difference. First operand 97824 states and 109991 transitions. Second operand 4 states. [2018-10-23 20:12:36,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:12:36,457 INFO L93 Difference]: Finished difference Result 195646 states and 219980 transitions. [2018-10-23 20:12:36,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:12:36,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2018-10-23 20:12:36,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:12:36,621 INFO L225 Difference]: With dead ends: 195646 [2018-10-23 20:12:36,622 INFO L226 Difference]: Without dead ends: 97824 [2018-10-23 20:12:36,676 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 [2018-10-23 20:12:36,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97824 states. [2018-10-23 20:12:37,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97824 to 97824. [2018-10-23 20:12:37,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97824 states. [2018-10-23 20:12:37,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97824 states to 97824 states and 108489 transitions. [2018-10-23 20:12:37,541 INFO L78 Accepts]: Start accepts. Automaton has 97824 states and 108489 transitions. Word has length 332 [2018-10-23 20:12:37,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:12:37,541 INFO L481 AbstractCegarLoop]: Abstraction has 97824 states and 108489 transitions. [2018-10-23 20:12:37,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:12:37,542 INFO L276 IsEmpty]: Start isEmpty. Operand 97824 states and 108489 transitions. [2018-10-23 20:12:37,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2018-10-23 20:12:37,572 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:12:37,572 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:12:37,573 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:12:37,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:12:37,573 INFO L82 PathProgramCache]: Analyzing trace with hash -124946050, now seen corresponding path program 1 times [2018-10-23 20:12:37,573 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:12:37,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:12:37,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:12:37,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:12:37,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:12:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:12:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 405 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-10-23 20:12:37,884 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:12:37,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:12:37,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:12:37,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:12:37,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:12:37,885 INFO L87 Difference]: Start difference. First operand 97824 states and 108489 transitions. Second operand 4 states. [2018-10-23 20:12:44,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:12:44,249 INFO L93 Difference]: Finished difference Result 195646 states and 216976 transitions. [2018-10-23 20:12:44,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:12:44,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 474 [2018-10-23 20:12:44,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:12:44,361 INFO L225 Difference]: With dead ends: 195646 [2018-10-23 20:12:44,361 INFO L226 Difference]: Without dead ends: 97824 [2018-10-23 20:12:44,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:12:44,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97824 states. [2018-10-23 20:12:45,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97824 to 97072. [2018-10-23 20:12:45,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97072 states. [2018-10-23 20:12:45,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97072 states to 97072 states and 106418 transitions. [2018-10-23 20:12:45,230 INFO L78 Accepts]: Start accepts. Automaton has 97072 states and 106418 transitions. Word has length 474 [2018-10-23 20:12:45,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:12:45,230 INFO L481 AbstractCegarLoop]: Abstraction has 97072 states and 106418 transitions. [2018-10-23 20:12:45,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:12:45,230 INFO L276 IsEmpty]: Start isEmpty. Operand 97072 states and 106418 transitions. [2018-10-23 20:12:45,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2018-10-23 20:12:45,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:12:45,254 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:12:45,254 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:12:45,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:12:45,255 INFO L82 PathProgramCache]: Analyzing trace with hash 370586703, now seen corresponding path program 1 times [2018-10-23 20:12:45,255 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:12:45,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:12:45,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:12:45,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:12:45,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:12:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:12:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-23 20:12:45,763 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:12:45,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:12:45,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:12:45,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:12:45,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:12:45,765 INFO L87 Difference]: Start difference. First operand 97072 states and 106418 transitions. Second operand 3 states. [2018-10-23 20:12:52,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:12:52,697 INFO L93 Difference]: Finished difference Result 215198 states and 236075 transitions. [2018-10-23 20:12:52,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:12:52,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2018-10-23 20:12:52,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:12:52,833 INFO L225 Difference]: With dead ends: 215198 [2018-10-23 20:12:52,833 INFO L226 Difference]: Without dead ends: 118128 [2018-10-23 20:12:52,880 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 [2018-10-23 20:12:52,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118128 states. [2018-10-23 20:12:53,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118128 to 118128. [2018-10-23 20:12:53,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118128 states. [2018-10-23 20:12:53,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118128 states to 118128 states and 128461 transitions. [2018-10-23 20:12:53,893 INFO L78 Accepts]: Start accepts. Automaton has 118128 states and 128461 transitions. Word has length 480 [2018-10-23 20:12:53,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:12:53,894 INFO L481 AbstractCegarLoop]: Abstraction has 118128 states and 128461 transitions. [2018-10-23 20:12:53,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:12:53,894 INFO L276 IsEmpty]: Start isEmpty. Operand 118128 states and 128461 transitions. [2018-10-23 20:12:53,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2018-10-23 20:12:53,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:12:53,921 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:12:53,921 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:12:53,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:12:53,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1189729698, now seen corresponding path program 1 times [2018-10-23 20:12:53,922 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:12:53,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:12:53,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:12:53,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:12:53,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:12:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:12:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 156 proven. 12 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2018-10-23 20:12:54,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:12:54,985 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 [2018-10-23 20:12:54,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:12:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:12:55,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:12:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2018-10-23 20:12:56,663 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:12:56,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2018-10-23 20:12:56,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 20:12:56,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 20:12:56,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-10-23 20:12:56,666 INFO L87 Difference]: Start difference. First operand 118128 states and 128461 transitions. Second operand 8 states. [2018-10-23 20:13:10,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:13:10,590 INFO L93 Difference]: Finished difference Result 281374 states and 304939 transitions. [2018-10-23 20:13:10,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 20:13:10,590 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 582 [2018-10-23 20:13:10,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:13:10,763 INFO L225 Difference]: With dead ends: 281374 [2018-10-23 20:13:10,763 INFO L226 Difference]: Without dead ends: 156468 [2018-10-23 20:13:10,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 582 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-10-23 20:13:10,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156468 states. [2018-10-23 20:13:12,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156468 to 148195. [2018-10-23 20:13:12,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148195 states. [2018-10-23 20:13:13,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148195 states to 148195 states and 157962 transitions. [2018-10-23 20:13:13,024 INFO L78 Accepts]: Start accepts. Automaton has 148195 states and 157962 transitions. Word has length 582 [2018-10-23 20:13:13,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:13:13,025 INFO L481 AbstractCegarLoop]: Abstraction has 148195 states and 157962 transitions. [2018-10-23 20:13:13,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 20:13:13,025 INFO L276 IsEmpty]: Start isEmpty. Operand 148195 states and 157962 transitions. [2018-10-23 20:13:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2018-10-23 20:13:13,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:13:13,048 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:13:13,048 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:13:13,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:13:13,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1462200261, now seen corresponding path program 1 times [2018-10-23 20:13:13,049 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:13:13,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:13:13,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:13:13,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:13:13,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:13:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:13:13,558 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-10-23 20:13:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 650 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2018-10-23 20:13:13,762 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:13:13,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 20:13:13,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 20:13:13,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 20:13:13,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:13:13,764 INFO L87 Difference]: Start difference. First operand 148195 states and 157962 transitions. Second operand 6 states. [2018-10-23 20:13:24,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:13:24,708 INFO L93 Difference]: Finished difference Result 326744 states and 348120 transitions. [2018-10-23 20:13:24,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:13:24,708 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 588 [2018-10-23 20:13:24,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:13:24,915 INFO L225 Difference]: With dead ends: 326744 [2018-10-23 20:13:24,916 INFO L226 Difference]: Without dead ends: 178551 [2018-10-23 20:13:25,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:13:25,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178551 states. [2018-10-23 20:13:26,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178551 to 162483. [2018-10-23 20:13:26,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162483 states. [2018-10-23 20:13:26,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162483 states to 162483 states and 171204 transitions. [2018-10-23 20:13:26,987 INFO L78 Accepts]: Start accepts. Automaton has 162483 states and 171204 transitions. Word has length 588 [2018-10-23 20:13:26,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:13:26,988 INFO L481 AbstractCegarLoop]: Abstraction has 162483 states and 171204 transitions. [2018-10-23 20:13:26,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 20:13:26,989 INFO L276 IsEmpty]: Start isEmpty. Operand 162483 states and 171204 transitions. [2018-10-23 20:13:27,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2018-10-23 20:13:27,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:13:27,009 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, 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, 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] [2018-10-23 20:13:27,010 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:13:27,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:13:27,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1747693829, now seen corresponding path program 1 times [2018-10-23 20:13:27,010 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:13:27,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:13:27,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:13:27,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:13:27,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:13:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:13:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 654 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2018-10-23 20:13:27,456 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:13:27,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:13:27,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:13:27,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:13:27,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:13:27,457 INFO L87 Difference]: Start difference. First operand 162483 states and 171204 transitions. Second operand 4 states. [2018-10-23 20:13:34,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:13:34,799 INFO L93 Difference]: Finished difference Result 325716 states and 343146 transitions. [2018-10-23 20:13:34,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:13:34,799 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 592 [2018-10-23 20:13:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:13:34,979 INFO L225 Difference]: With dead ends: 325716 [2018-10-23 20:13:34,979 INFO L226 Difference]: Without dead ends: 160225 [2018-10-23 20:13:35,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:13:35,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160225 states. [2018-10-23 20:13:40,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160225 to 157217. [2018-10-23 20:13:40,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157217 states. [2018-10-23 20:13:40,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157217 states to 157217 states and 162946 transitions. [2018-10-23 20:13:40,712 INFO L78 Accepts]: Start accepts. Automaton has 157217 states and 162946 transitions. Word has length 592 [2018-10-23 20:13:40,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:13:40,713 INFO L481 AbstractCegarLoop]: Abstraction has 157217 states and 162946 transitions. [2018-10-23 20:13:40,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:13:40,713 INFO L276 IsEmpty]: Start isEmpty. Operand 157217 states and 162946 transitions. [2018-10-23 20:13:40,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2018-10-23 20:13:40,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:13:40,729 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:13:40,730 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:13:40,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:13:40,730 INFO L82 PathProgramCache]: Analyzing trace with hash -665011732, now seen corresponding path program 1 times [2018-10-23 20:13:40,730 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:13:40,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:13:40,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:13:40,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:13:40,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:13:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:13:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 557 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-10-23 20:13:41,383 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:13:41,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:13:41,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:13:41,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:13:41,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:13:41,384 INFO L87 Difference]: Start difference. First operand 157217 states and 162946 transitions. Second operand 4 states. [2018-10-23 20:13:49,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:13:49,154 INFO L93 Difference]: Finished difference Result 313680 states and 325133 transitions. [2018-10-23 20:13:49,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:13:49,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 603 [2018-10-23 20:13:49,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:13:49,333 INFO L225 Difference]: With dead ends: 313680 [2018-10-23 20:13:49,333 INFO L226 Difference]: Without dead ends: 157217 [2018-10-23 20:13:49,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:13:49,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157217 states. [2018-10-23 20:13:51,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157217 to 151953. [2018-10-23 20:13:51,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151953 states. [2018-10-23 20:13:51,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151953 states to 151953 states and 156358 transitions. [2018-10-23 20:13:51,462 INFO L78 Accepts]: Start accepts. Automaton has 151953 states and 156358 transitions. Word has length 603 [2018-10-23 20:13:51,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:13:51,463 INFO L481 AbstractCegarLoop]: Abstraction has 151953 states and 156358 transitions. [2018-10-23 20:13:51,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:13:51,463 INFO L276 IsEmpty]: Start isEmpty. Operand 151953 states and 156358 transitions. [2018-10-23 20:13:51,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2018-10-23 20:13:51,482 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:13:51,483 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, 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, 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, 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] [2018-10-23 20:13:51,483 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:13:51,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:13:51,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1504455587, now seen corresponding path program 1 times [2018-10-23 20:13:51,483 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:13:51,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:13:51,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:13:51,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:13:51,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:13:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:13:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2018-10-23 20:13:52,496 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:13:52,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:13:52,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:13:52,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:13:52,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:13:52,498 INFO L87 Difference]: Start difference. First operand 151953 states and 156358 transitions. Second operand 5 states. [2018-10-23 20:14:04,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:14:04,905 INFO L93 Difference]: Finished difference Result 436302 states and 449039 transitions. [2018-10-23 20:14:04,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:14:04,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 634 [2018-10-23 20:14:04,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:14:05,225 INFO L225 Difference]: With dead ends: 436302 [2018-10-23 20:14:05,225 INFO L226 Difference]: Without dead ends: 285103 [2018-10-23 20:14:05,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:14:05,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285103 states. [2018-10-23 20:14:07,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285103 to 200855. [2018-10-23 20:14:07,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200855 states. [2018-10-23 20:14:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200855 states to 200855 states and 205996 transitions. [2018-10-23 20:14:08,114 INFO L78 Accepts]: Start accepts. Automaton has 200855 states and 205996 transitions. Word has length 634 [2018-10-23 20:14:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:14:08,115 INFO L481 AbstractCegarLoop]: Abstraction has 200855 states and 205996 transitions. [2018-10-23 20:14:08,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:14:08,115 INFO L276 IsEmpty]: Start isEmpty. Operand 200855 states and 205996 transitions. [2018-10-23 20:14:08,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2018-10-23 20:14:08,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:14:08,131 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:14:08,131 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:14:08,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:14:08,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1685967853, now seen corresponding path program 1 times [2018-10-23 20:14:08,132 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:14:08,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:14:08,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:14:08,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:14:08,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:14:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:14:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-10-23 20:14:08,754 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:14:08,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:14:08,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:14:08,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:14:08,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:14:08,759 INFO L87 Difference]: Start difference. First operand 200855 states and 205996 transitions. Second operand 4 states. [2018-10-23 20:14:17,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:14:17,433 INFO L93 Difference]: Finished difference Result 384382 states and 394555 transitions. [2018-10-23 20:14:17,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:14:17,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 657 [2018-10-23 20:14:17,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:14:17,632 INFO L225 Difference]: With dead ends: 384382 [2018-10-23 20:14:17,632 INFO L226 Difference]: Without dead ends: 184281 [2018-10-23 20:14:17,725 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 [2018-10-23 20:14:17,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184281 states. [2018-10-23 20:14:19,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184281 to 164729. [2018-10-23 20:14:19,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164729 states. [2018-10-23 20:14:20,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164729 states to 164729 states and 167959 transitions. [2018-10-23 20:14:20,098 INFO L78 Accepts]: Start accepts. Automaton has 164729 states and 167959 transitions. Word has length 657 [2018-10-23 20:14:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:14:20,098 INFO L481 AbstractCegarLoop]: Abstraction has 164729 states and 167959 transitions. [2018-10-23 20:14:20,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:14:20,099 INFO L276 IsEmpty]: Start isEmpty. Operand 164729 states and 167959 transitions. [2018-10-23 20:14:20,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1038 [2018-10-23 20:14:20,161 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:14:20,162 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:14:20,162 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:14:20,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:14:20,162 INFO L82 PathProgramCache]: Analyzing trace with hash 942381596, now seen corresponding path program 1 times [2018-10-23 20:14:20,163 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:14:20,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:14:20,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:14:20,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:14:20,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:14:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:14:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 799 backedges. 153 proven. 382 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-10-23 20:14:23,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:14:23,081 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 [2018-10-23 20:14:23,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:14:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:14:23,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:14:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 799 backedges. 203 proven. 332 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-10-23 20:14:25,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:14:25,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-10-23 20:14:25,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 20:14:25,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 20:14:25,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:14:25,336 INFO L87 Difference]: Start difference. First operand 164729 states and 167959 transitions. Second operand 7 states. Received shutdown request... [2018-10-23 20:14:34,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 20:14:34,495 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 20:14:34,502 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 20:14:34,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:14:34 BoogieIcfgContainer [2018-10-23 20:14:34,503 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 20:14:34,504 INFO L168 Benchmark]: Toolchain (without parser) took 225425.67 ms. Allocated memory was 1.5 GB in the beginning and 4.3 GB in the end (delta: 2.8 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -536.6 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-10-23 20:14:34,505 INFO L168 Benchmark]: CDTParser took 0.22 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. [2018-10-23 20:14:34,506 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2262.54 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. [2018-10-23 20:14:34,506 INFO L168 Benchmark]: Boogie Procedure Inliner took 622.77 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 783.3 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -973.5 MB). Peak memory consumption was 68.8 MB. Max. memory is 7.1 GB. [2018-10-23 20:14:34,507 INFO L168 Benchmark]: Boogie Preprocessor took 326.55 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: 48.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2018-10-23 20:14:34,508 INFO L168 Benchmark]: RCFGBuilder took 8576.81 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 231.7 MB). Free memory was 2.1 GB in the beginning and 2.3 GB in the end (delta: -184.0 MB). Peak memory consumption was 632.1 MB. Max. memory is 7.1 GB. [2018-10-23 20:14:34,509 INFO L168 Benchmark]: TraceAbstraction took 213630.01 ms. Allocated memory was 2.5 GB in the beginning and 4.3 GB in the end (delta: 1.8 GB). Free memory was 2.3 GB in the beginning and 1.9 GB in the end (delta: 371.8 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-10-23 20:14:34,517 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2262.54 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 622.77 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 783.3 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -973.5 MB). Peak memory consumption was 68.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 326.55 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: 48.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8576.81 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 231.7 MB). Free memory was 2.1 GB in the beginning and 2.3 GB in the end (delta: -184.0 MB). Peak memory consumption was 632.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 213630.01 ms. Allocated memory was 2.5 GB in the beginning and 4.3 GB in the end (delta: 1.8 GB). Free memory was 2.3 GB in the beginning and 1.9 GB in the end (delta: 371.8 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 168]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 168). Cancelled while BasicCegarLoop was constructing difference of abstraction (164729states) and FLOYD_HOARE automaton (currently 7 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (73332 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 819 locations, 1 error locations. TIMEOUT Result, 213.5s OverallTime, 15 OverallIterations, 5 TraceHistogramMax, 174.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 9184 SDtfs, 41153 SDslu, 1485 SDs, 0 SdLazy, 79546 SolverSat, 15547 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 137.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2229 GetRequests, 2161 SyntacticMatches, 17 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=200855occurred in iteration=13, 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: 22.7s AutomataMinimizationTime, 14 MinimizatonAttempts, 163532 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 10.3s InterpolantComputationTime, 9118 NumberOfCodeBlocks, 9118 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 9099 ConstructedInterpolants, 0 QuantifiedInterpolants, 15984377 SizeOfPredicates, 3 NumberOfNonLiveVariables, 2605 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 19 InterpolantComputations, 14 PerfectInterpolantSequences, 7886/8624 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown