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_label24_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 20:09:56,966 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 20:09:56,968 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 20:09:56,980 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 20:09:56,980 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 20:09:56,981 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 20:09:56,982 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 20:09:56,984 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 20:09:56,986 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 20:09:56,986 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 20:09:56,987 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 20:09:56,988 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 20:09:56,988 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 20:09:56,989 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 20:09:56,990 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 20:09:56,991 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 20:09:56,992 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 20:09:56,994 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 20:09:56,996 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 20:09:56,997 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 20:09:56,998 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 20:09:56,999 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 20:09:57,002 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 20:09:57,002 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 20:09:57,002 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 20:09:57,003 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 20:09:57,004 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 20:09:57,005 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 20:09:57,006 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 20:09:57,007 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 20:09:57,007 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 20:09:57,008 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-23 20:09:57,008 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-23 20:09:57,008 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-23 20:09:57,009 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-23 20:09:57,010 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-23 20:09:57,010 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 20:09:57,026 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 20:09:57,026 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 20:09:57,027 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 20:09:57,027 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 20:09:57,028 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 20:09:57,028 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 20:09:57,028 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 20:09:57,029 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 20:09:57,029 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 20:09:57,029 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 20:09:57,029 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 20:09:57,029 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 20:09:57,029 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 20:09:57,030 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 20:09:57,030 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 20:09:57,030 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 20:09:57,030 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 20:09:57,030 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 20:09:57,031 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 20:09:57,031 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:09:57,031 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 20:09:57,031 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 20:09:57,031 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 20:09:57,032 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 20:09:57,032 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 20:09:57,032 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 20:09:57,032 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 20:09:57,032 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 20:09:57,074 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 20:09:57,088 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 20:09:57,092 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 20:09:57,094 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 20:09:57,094 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 20:09:57,095 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label24_true-unreach-call.c [2018-10-23 20:09:57,156 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3c378aa9e/8ffc032fb9084cdcba14edc2bc383348/FLAG2cceea543 [2018-10-23 20:09:57,877 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 20:09:57,878 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label24_true-unreach-call.c [2018-10-23 20:09:57,906 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3c378aa9e/8ffc032fb9084cdcba14edc2bc383348/FLAG2cceea543 [2018-10-23 20:09:57,922 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3c378aa9e/8ffc032fb9084cdcba14edc2bc383348 [2018-10-23 20:09:57,933 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 20:09:57,935 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 20:09:57,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 20:09:57,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 20:09:57,940 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 20:09:57,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:09:57" (1/1) ... [2018-10-23 20:09:57,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1923ebb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:09:57, skipping insertion in model container [2018-10-23 20:09:57,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:09:57" (1/1) ... [2018-10-23 20:09:57,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 20:09:58,116 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 20:09:59,412 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:09:59,416 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 20:09:59,957 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:09:59,990 INFO L193 MainTranslator]: Completed translation [2018-10-23 20:09:59,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:09:59 WrapperNode [2018-10-23 20:09:59,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 20:09:59,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 20:09:59,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 20:09:59,992 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 20:10:00,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:09:59" (1/1) ... [2018-10-23 20:10:00,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:09:59" (1/1) ... [2018-10-23 20:10:00,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 20:10:00,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 20:10:00,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 20:10:00,698 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 20:10:00,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:09:59" (1/1) ... [2018-10-23 20:10:00,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:09:59" (1/1) ... [2018-10-23 20:10:00,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:09:59" (1/1) ... [2018-10-23 20:10:00,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:09:59" (1/1) ... [2018-10-23 20:10:00,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:09:59" (1/1) ... [2018-10-23 20:10:00,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:09:59" (1/1) ... [2018-10-23 20:10:00,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:09:59" (1/1) ... [2018-10-23 20:10:00,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 20:10:00,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 20:10:00,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 20:10:00,990 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 20:10:00,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:09:59" (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 20:10:01,063 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 20:10:01,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 20:10:01,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 20:10:10,105 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 20:10:10,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:10:10 BoogieIcfgContainer [2018-10-23 20:10:10,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 20:10:10,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 20:10:10,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 20:10:10,110 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 20:10:10,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:09:57" (1/3) ... [2018-10-23 20:10:10,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f4526b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:10:10, skipping insertion in model container [2018-10-23 20:10:10,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:09:59" (2/3) ... [2018-10-23 20:10:10,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f4526b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:10:10, skipping insertion in model container [2018-10-23 20:10:10,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:10:10" (3/3) ... [2018-10-23 20:10:10,114 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label24_true-unreach-call.c [2018-10-23 20:10:10,125 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 20:10:10,136 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 20:10:10,155 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 20:10:10,199 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 20:10:10,199 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 20:10:10,200 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 20:10:10,200 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 20:10:10,200 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 20:10:10,200 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 20:10:10,200 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 20:10:10,200 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 20:10:10,201 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 20:10:10,246 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states. [2018-10-23 20:10:10,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-23 20:10:10,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:10:10,264 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] [2018-10-23 20:10:10,269 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:10:10,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:10:10,277 INFO L82 PathProgramCache]: Analyzing trace with hash 84973194, now seen corresponding path program 1 times [2018-10-23 20:10:10,280 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:10:10,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:10:10,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:10:10,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:10:10,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:10:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:10:10,816 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-23 20:10:10,827 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 20:10:10,830 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:10:10,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:10:10,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:10:10,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:10:10,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:10:10,855 INFO L87 Difference]: Start difference. First operand 819 states. Second operand 4 states. [2018-10-23 20:10:27,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:10:27,188 INFO L93 Difference]: Finished difference Result 3146 states and 6134 transitions. [2018-10-23 20:10:27,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:10:27,191 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2018-10-23 20:10:27,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:10:27,228 INFO L225 Difference]: With dead ends: 3146 [2018-10-23 20:10:27,229 INFO L226 Difference]: Without dead ends: 2320 [2018-10-23 20:10:27,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 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 20:10:27,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2018-10-23 20:10:27,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 2320. [2018-10-23 20:10:27,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2320 states. [2018-10-23 20:10:27,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 3858 transitions. [2018-10-23 20:10:27,383 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 3858 transitions. Word has length 47 [2018-10-23 20:10:27,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:10:27,384 INFO L481 AbstractCegarLoop]: Abstraction has 2320 states and 3858 transitions. [2018-10-23 20:10:27,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:10:27,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 3858 transitions. [2018-10-23 20:10:27,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-23 20:10:27,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:10:27,390 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:10:27,390 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:10:27,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:10:27,391 INFO L82 PathProgramCache]: Analyzing trace with hash -936824486, now seen corresponding path program 1 times [2018-10-23 20:10:27,391 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:10:27,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:10:27,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:10:27,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:10:27,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:10:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:10:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:10:27,825 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:10:27,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:10:27,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:10:27,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:10:27,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:10:27,828 INFO L87 Difference]: Start difference. First operand 2320 states and 3858 transitions. Second operand 4 states. [2018-10-23 20:10:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:10:39,951 INFO L93 Difference]: Finished difference Result 9150 states and 15304 transitions. [2018-10-23 20:10:39,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:10:39,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2018-10-23 20:10:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:10:39,986 INFO L225 Difference]: With dead ends: 9150 [2018-10-23 20:10:39,986 INFO L226 Difference]: Without dead ends: 6832 [2018-10-23 20:10:39,991 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 20:10:39,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2018-10-23 20:10:40,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 6832. [2018-10-23 20:10:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6832 states. [2018-10-23 20:10:40,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6832 states to 6832 states and 9936 transitions. [2018-10-23 20:10:40,117 INFO L78 Accepts]: Start accepts. Automaton has 6832 states and 9936 transitions. Word has length 119 [2018-10-23 20:10:40,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:10:40,118 INFO L481 AbstractCegarLoop]: Abstraction has 6832 states and 9936 transitions. [2018-10-23 20:10:40,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:10:40,118 INFO L276 IsEmpty]: Start isEmpty. Operand 6832 states and 9936 transitions. [2018-10-23 20:10:40,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-23 20:10:40,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:10:40,126 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:10:40,131 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:10:40,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:10:40,132 INFO L82 PathProgramCache]: Analyzing trace with hash -320161239, now seen corresponding path program 1 times [2018-10-23 20:10:40,132 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:10:40,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:10:40,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:10:40,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:10:40,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:10:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:10:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:10:40,613 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:10:40,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 20:10:40,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 20:10:40,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 20:10:40,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:10:40,614 INFO L87 Difference]: Start difference. First operand 6832 states and 9936 transitions. Second operand 6 states. [2018-10-23 20:10:52,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:10:52,574 INFO L93 Difference]: Finished difference Result 21934 states and 31609 transitions. [2018-10-23 20:10:52,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:10:52,574 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2018-10-23 20:10:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:10:52,635 INFO L225 Difference]: With dead ends: 21934 [2018-10-23 20:10:52,635 INFO L226 Difference]: Without dead ends: 15104 [2018-10-23 20:10:52,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:10:52,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15104 states. [2018-10-23 20:10:52,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15104 to 15104. [2018-10-23 20:10:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15104 states. [2018-10-23 20:10:52,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15104 states to 15104 states and 21135 transitions. [2018-10-23 20:10:52,902 INFO L78 Accepts]: Start accepts. Automaton has 15104 states and 21135 transitions. Word has length 125 [2018-10-23 20:10:52,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:10:52,903 INFO L481 AbstractCegarLoop]: Abstraction has 15104 states and 21135 transitions. [2018-10-23 20:10:52,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 20:10:52,904 INFO L276 IsEmpty]: Start isEmpty. Operand 15104 states and 21135 transitions. [2018-10-23 20:10:52,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-23 20:10:52,907 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:10:52,908 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, 2, 2, 2, 2, 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] [2018-10-23 20:10:52,908 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:10:52,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:10:52,908 INFO L82 PathProgramCache]: Analyzing trace with hash 257272057, now seen corresponding path program 1 times [2018-10-23 20:10:52,908 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:10:52,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:10:52,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:10:52,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:10:52,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:10:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:10:53,424 WARN L179 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2018-10-23 20:10:53,665 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 9 [2018-10-23 20:10:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 145 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-23 20:10:53,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:10:53,897 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 20:10:54,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:10:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:10:54,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:10:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:10:54,375 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:10:54,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-23 20:10:54,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 20:10:54,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 20:10:54,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:10:54,377 INFO L87 Difference]: Start difference. First operand 15104 states and 21135 transitions. Second operand 7 states. [2018-10-23 20:11:17,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:11:17,156 INFO L93 Difference]: Finished difference Result 79868 states and 112723 transitions. [2018-10-23 20:11:17,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 20:11:17,157 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 197 [2018-10-23 20:11:17,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:11:17,301 INFO L225 Difference]: With dead ends: 79868 [2018-10-23 20:11:17,301 INFO L226 Difference]: Without dead ends: 63259 [2018-10-23 20:11:17,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-23 20:11:17,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63259 states. [2018-10-23 20:11:18,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63259 to 40671. [2018-10-23 20:11:18,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40671 states. [2018-10-23 20:11:18,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40671 states to 40671 states and 48760 transitions. [2018-10-23 20:11:18,535 INFO L78 Accepts]: Start accepts. Automaton has 40671 states and 48760 transitions. Word has length 197 [2018-10-23 20:11:18,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:11:18,536 INFO L481 AbstractCegarLoop]: Abstraction has 40671 states and 48760 transitions. [2018-10-23 20:11:18,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 20:11:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 40671 states and 48760 transitions. [2018-10-23 20:11:18,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-10-23 20:11:18,549 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:11:18,549 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:18,550 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:11:18,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:11:18,550 INFO L82 PathProgramCache]: Analyzing trace with hash -2127600608, now seen corresponding path program 1 times [2018-10-23 20:11:18,550 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:11:18,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:11:18,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:11:18,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:11:18,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:11:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:11:19,038 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-23 20:11:19,565 WARN L179 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2018-10-23 20:11:20,160 WARN L179 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2018-10-23 20:11:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 236 proven. 8 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-10-23 20:11:20,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:11:20,385 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 20:11:20,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:11:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:11:20,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:11:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-10-23 20:11:20,614 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:11:20,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-23 20:11:20,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 20:11:20,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 20:11:20,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:11:20,616 INFO L87 Difference]: Start difference. First operand 40671 states and 48760 transitions. Second operand 7 states. [2018-10-23 20:11:33,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:11:33,600 INFO L93 Difference]: Finished difference Result 92621 states and 110572 transitions. [2018-10-23 20:11:33,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 20:11:33,607 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 368 [2018-10-23 20:11:33,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:11:33,697 INFO L225 Difference]: With dead ends: 92621 [2018-10-23 20:11:33,697 INFO L226 Difference]: Without dead ends: 51951 [2018-10-23 20:11:33,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 371 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-10-23 20:11:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51951 states. [2018-10-23 20:11:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51951 to 51951. [2018-10-23 20:11:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51951 states. [2018-10-23 20:11:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51951 states to 51951 states and 56873 transitions. [2018-10-23 20:11:34,376 INFO L78 Accepts]: Start accepts. Automaton has 51951 states and 56873 transitions. Word has length 368 [2018-10-23 20:11:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:11:34,377 INFO L481 AbstractCegarLoop]: Abstraction has 51951 states and 56873 transitions. [2018-10-23 20:11:34,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 20:11:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 51951 states and 56873 transitions. [2018-10-23 20:11:34,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-10-23 20:11:34,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:11:34,394 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 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 20:11:34,395 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:11:34,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:11:34,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1870176737, now seen corresponding path program 1 times [2018-10-23 20:11:34,395 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:11:34,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:11:34,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:11:34,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:11:34,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:11:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:11:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 331 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-23 20:11:35,005 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:11:35,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:11:35,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:11:35,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:11:35,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:11:35,007 INFO L87 Difference]: Start difference. First operand 51951 states and 56873 transitions. Second operand 4 states. [2018-10-23 20:11:43,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:11:43,762 INFO L93 Difference]: Finished difference Result 109916 states and 120731 transitions. [2018-10-23 20:11:43,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:11:43,763 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 406 [2018-10-23 20:11:43,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:11:43,834 INFO L225 Difference]: With dead ends: 109916 [2018-10-23 20:11:43,835 INFO L226 Difference]: Without dead ends: 58719 [2018-10-23 20:11:43,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 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 20:11:43,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58719 states. [2018-10-23 20:11:44,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58719 to 57967. [2018-10-23 20:11:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57967 states. [2018-10-23 20:11:44,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57967 states to 57967 states and 62925 transitions. [2018-10-23 20:11:44,480 INFO L78 Accepts]: Start accepts. Automaton has 57967 states and 62925 transitions. Word has length 406 [2018-10-23 20:11:44,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:11:44,481 INFO L481 AbstractCegarLoop]: Abstraction has 57967 states and 62925 transitions. [2018-10-23 20:11:44,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:11:44,481 INFO L276 IsEmpty]: Start isEmpty. Operand 57967 states and 62925 transitions. [2018-10-23 20:11:44,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2018-10-23 20:11:44,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:11:44,505 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-23 20:11:44,505 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:11:44,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:11:44,506 INFO L82 PathProgramCache]: Analyzing trace with hash -65666149, now seen corresponding path program 1 times [2018-10-23 20:11:44,506 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:11:44,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:11:44,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:11:44,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:11:44,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:11:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:11:44,954 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-23 20:11:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 465 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-10-23 20:11:45,037 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:11:45,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:11:45,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:11:45,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:11:45,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:11:45,039 INFO L87 Difference]: Start difference. First operand 57967 states and 62925 transitions. Second operand 4 states. [2018-10-23 20:11:53,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:11:53,243 INFO L93 Difference]: Finished difference Result 137740 states and 149642 transitions. [2018-10-23 20:11:53,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:11:53,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2018-10-23 20:11:53,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:11:53,366 INFO L225 Difference]: With dead ends: 137740 [2018-10-23 20:11:53,367 INFO L226 Difference]: Without dead ends: 80527 [2018-10-23 20:11:53,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 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 20:11:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80527 states. [2018-10-23 20:11:54,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80527 to 79023. [2018-10-23 20:11:54,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79023 states. [2018-10-23 20:11:54,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79023 states to 79023 states and 85399 transitions. [2018-10-23 20:11:54,258 INFO L78 Accepts]: Start accepts. Automaton has 79023 states and 85399 transitions. Word has length 481 [2018-10-23 20:11:54,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:11:54,258 INFO L481 AbstractCegarLoop]: Abstraction has 79023 states and 85399 transitions. [2018-10-23 20:11:54,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:11:54,259 INFO L276 IsEmpty]: Start isEmpty. Operand 79023 states and 85399 transitions. [2018-10-23 20:11:54,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2018-10-23 20:11:54,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:11:54,287 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-23 20:11:54,287 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:11:54,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:11:54,288 INFO L82 PathProgramCache]: Analyzing trace with hash -294675675, now seen corresponding path program 1 times [2018-10-23 20:11:54,288 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:11:54,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:11:54,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:11:54,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:11:54,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:11:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:11:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-10-23 20:11:54,776 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:11:54,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:11:54,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:11:54,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:11:54,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:11:54,778 INFO L87 Difference]: Start difference. First operand 79023 states and 85399 transitions. Second operand 5 states. [2018-10-23 20:12:05,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:12:05,233 INFO L93 Difference]: Finished difference Result 228772 states and 247688 transitions. [2018-10-23 20:12:05,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:12:05,233 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 485 [2018-10-23 20:12:05,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:12:05,387 INFO L225 Difference]: With dead ends: 228772 [2018-10-23 20:12:05,387 INFO L226 Difference]: Without dead ends: 150503 [2018-10-23 20:12:05,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:12:05,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150503 states. [2018-10-23 20:12:06,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150503 to 125687. [2018-10-23 20:12:06,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125687 states. [2018-10-23 20:12:06,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125687 states to 125687 states and 133649 transitions. [2018-10-23 20:12:06,739 INFO L78 Accepts]: Start accepts. Automaton has 125687 states and 133649 transitions. Word has length 485 [2018-10-23 20:12:06,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:12:06,740 INFO L481 AbstractCegarLoop]: Abstraction has 125687 states and 133649 transitions. [2018-10-23 20:12:06,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:12:06,740 INFO L276 IsEmpty]: Start isEmpty. Operand 125687 states and 133649 transitions. [2018-10-23 20:12:06,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1006 [2018-10-23 20:12:06,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:12:06,899 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, 4, 4, 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, 2, 2, 2, 2, 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] [2018-10-23 20:12:06,900 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:12:06,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:12:06,900 INFO L82 PathProgramCache]: Analyzing trace with hash -406535854, now seen corresponding path program 1 times [2018-10-23 20:12:06,900 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:12:06,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:12:06,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:12:06,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:12:06,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:12:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:12:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 512 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-10-23 20:12:08,780 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:12:08,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:12:08,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:12:08,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:12:08,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:12:08,782 INFO L87 Difference]: Start difference. First operand 125687 states and 133649 transitions. Second operand 4 states. [2018-10-23 20:12:16,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:12:16,276 INFO L93 Difference]: Finished difference Result 246097 states and 261970 transitions. [2018-10-23 20:12:16,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:12:16,277 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1005 [2018-10-23 20:12:16,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:12:16,410 INFO L225 Difference]: With dead ends: 246097 [2018-10-23 20:12:16,410 INFO L226 Difference]: Without dead ends: 104574 [2018-10-23 20:12:16,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:12:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104574 states. [2018-10-23 20:12:17,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104574 to 94798. [2018-10-23 20:12:17,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94798 states. [2018-10-23 20:12:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94798 states to 94798 states and 99342 transitions. [2018-10-23 20:12:17,586 INFO L78 Accepts]: Start accepts. Automaton has 94798 states and 99342 transitions. Word has length 1005 [2018-10-23 20:12:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:12:17,587 INFO L481 AbstractCegarLoop]: Abstraction has 94798 states and 99342 transitions. [2018-10-23 20:12:17,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:12:17,588 INFO L276 IsEmpty]: Start isEmpty. Operand 94798 states and 99342 transitions. [2018-10-23 20:12:17,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1035 [2018-10-23 20:12:17,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:12:17,664 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:12:17,664 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:12:17,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:12:17,665 INFO L82 PathProgramCache]: Analyzing trace with hash -68173860, now seen corresponding path program 1 times [2018-10-23 20:12:17,665 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:12:17,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:12:17,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:12:17,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:12:17,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:12:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:12:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 701 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2018-10-23 20:12:19,040 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:12:19,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:12:19,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:12:19,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:12:19,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:12:19,042 INFO L87 Difference]: Start difference. First operand 94798 states and 99342 transitions. Second operand 3 states. [2018-10-23 20:12:26,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:12:26,458 INFO L93 Difference]: Finished difference Result 238474 states and 250460 transitions. [2018-10-23 20:12:26,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:12:26,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1034 [2018-10-23 20:12:26,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:12:26,605 INFO L225 Difference]: With dead ends: 238474 [2018-10-23 20:12:26,605 INFO L226 Difference]: Without dead ends: 143677 [2018-10-23 20:12:26,661 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 20:12:26,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143677 states. [2018-10-23 20:12:28,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143677 to 132397. [2018-10-23 20:12:28,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132397 states. [2018-10-23 20:12:28,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132397 states to 132397 states and 137869 transitions. [2018-10-23 20:12:28,533 INFO L78 Accepts]: Start accepts. Automaton has 132397 states and 137869 transitions. Word has length 1034 [2018-10-23 20:12:28,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:12:28,534 INFO L481 AbstractCegarLoop]: Abstraction has 132397 states and 137869 transitions. [2018-10-23 20:12:28,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:12:28,534 INFO L276 IsEmpty]: Start isEmpty. Operand 132397 states and 137869 transitions. [2018-10-23 20:12:28,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1043 [2018-10-23 20:12:28,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:12:28,610 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-23 20:12:28,610 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:12:28,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:12:28,611 INFO L82 PathProgramCache]: Analyzing trace with hash -688117906, now seen corresponding path program 1 times [2018-10-23 20:12:28,611 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:12:28,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:12:28,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:12:28,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:12:28,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:12:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:12:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 725 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-10-23 20:12:29,509 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:12:29,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:12:29,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:12:29,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:12:29,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:12:29,511 INFO L87 Difference]: Start difference. First operand 132397 states and 137869 transitions. Second operand 4 states. [2018-10-23 20:12:37,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:12:37,497 INFO L93 Difference]: Finished difference Result 296376 states and 308510 transitions. [2018-10-23 20:12:37,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:12:37,498 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1042 [2018-10-23 20:12:37,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:12:37,681 INFO L225 Difference]: With dead ends: 296376 [2018-10-23 20:12:37,682 INFO L226 Difference]: Without dead ends: 164733 [2018-10-23 20:12:37,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 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 20:12:37,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164733 states. [2018-10-23 20:12:38,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164733 to 148189. [2018-10-23 20:12:38,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148189 states. [2018-10-23 20:12:40,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148189 states to 148189 states and 153748 transitions. [2018-10-23 20:12:40,365 INFO L78 Accepts]: Start accepts. Automaton has 148189 states and 153748 transitions. Word has length 1042 [2018-10-23 20:12:40,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:12:40,366 INFO L481 AbstractCegarLoop]: Abstraction has 148189 states and 153748 transitions. [2018-10-23 20:12:40,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:12:40,366 INFO L276 IsEmpty]: Start isEmpty. Operand 148189 states and 153748 transitions. [2018-10-23 20:12:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1173 [2018-10-23 20:12:40,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:12:40,439 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:12:40,439 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:12:40,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:12:40,440 INFO L82 PathProgramCache]: Analyzing trace with hash -812773691, now seen corresponding path program 1 times [2018-10-23 20:12:40,441 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:12:40,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:12:40,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:12:40,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:12:40,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:12:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:12:41,607 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-23 20:12:42,151 WARN L179 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2018-10-23 20:12:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 679 proven. 45 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-10-23 20:12:48,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:12:48,111 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 20:12:48,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:12:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:12:48,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:12:48,921 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 16 [2018-10-23 20:12:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 679 proven. 45 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-10-23 20:12:51,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:12:51,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 14 [2018-10-23 20:12:51,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-23 20:12:51,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-23 20:12:51,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-10-23 20:12:51,108 INFO L87 Difference]: Start difference. First operand 148189 states and 153748 transitions. Second operand 14 states. [2018-10-23 20:13:40,434 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2018-10-23 20:13:45,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:13:45,908 INFO L93 Difference]: Finished difference Result 409213 states and 425976 transitions. [2018-10-23 20:13:45,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-23 20:13:45,909 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1172 [2018-10-23 20:13:45,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:13:45,910 INFO L225 Difference]: With dead ends: 409213 [2018-10-23 20:13:45,910 INFO L226 Difference]: Without dead ends: 0 [2018-10-23 20:13:45,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1240 GetRequests, 1189 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=684, Invalid=1866, Unknown=0, NotChecked=0, Total=2550 [2018-10-23 20:13:45,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-23 20:13:45,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-23 20:13:45,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-23 20:13:45,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-23 20:13:45,979 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1172 [2018-10-23 20:13:45,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:13:45,979 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-23 20:13:45,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-23 20:13:45,979 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-23 20:13:45,979 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-23 20:13:45,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-23 20:13:46,060 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 20:13:46,221 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 20:13:46,259 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 20:13:46,400 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 20:13:47,054 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 20:13:47,132 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 20:13:47,477 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 20:13:47,538 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 20:13:47,822 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 20:13:47,950 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 20:13:48,335 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 20:13:48,513 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 20:13:48,702 WARN L179 SmtUtils]: Spent 2.71 s on a formula simplification. DAG size of input: 722 DAG size of output: 476 [2018-10-23 20:13:48,763 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 20:13:48,923 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 20:13:48,962 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 20:13:49,087 WARN L250 erpolLogProxyWrapper]: Already inconsistent. Received shutdown request... [2018-10-23 20:13:49,304 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-10-23 20:13:49,306 INFO L168 Benchmark]: Toolchain (without parser) took 231371.95 ms. Allocated memory was 1.5 GB in the beginning and 3.6 GB in the end (delta: 2.1 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -445.2 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-10-23 20:13:49,307 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 20:13:49,307 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2054.99 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 20:13:49,309 INFO L168 Benchmark]: Boogie Procedure Inliner took 705.43 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 795.9 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -989.3 MB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. [2018-10-23 20:13:49,310 INFO L168 Benchmark]: Boogie Preprocessor took 291.57 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: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 7.1 GB. [2018-10-23 20:13:49,312 INFO L168 Benchmark]: RCFGBuilder took 9116.97 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 215.0 MB). Free memory was 2.1 GB in the beginning and 2.3 GB in the end (delta: -169.6 MB). Peak memory consumption was 636.3 MB. Max. memory is 7.1 GB. [2018-10-23 20:13:49,313 INFO L168 Benchmark]: TraceAbstraction took 219197.85 ms. Allocated memory was 2.5 GB in the beginning and 3.6 GB in the end (delta: 1.1 GB). Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 469.8 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-10-23 20:13:49,320 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2054.99 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 705.43 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 795.9 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -989.3 MB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 291.57 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: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9116.97 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 215.0 MB). Free memory was 2.1 GB in the beginning and 2.3 GB in the end (delta: -169.6 MB). Peak memory consumption was 636.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 219197.85 ms. Allocated memory was 2.5 GB in the beginning and 3.6 GB in the end (delta: 1.1 GB). Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 469.8 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 150]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 677. RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown