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/Problem17_label27_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:48:29,103 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:48:29,105 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:48:29,120 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:48:29,121 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:48:29,122 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:48:29,123 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:48:29,124 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:48:29,126 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:48:29,127 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:48:29,128 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:48:29,128 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:48:29,129 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:48:29,130 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:48:29,131 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:48:29,132 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:48:29,133 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:48:29,135 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:48:29,137 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:48:29,138 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:48:29,140 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:48:29,141 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:48:29,143 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 16:48:29,143 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 16:48:29,144 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 16:48:29,145 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 16:48:29,146 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 16:48:29,146 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 16:48:29,147 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 16:48:29,148 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 16:48:29,149 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 16:48:29,149 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 16:48:29,150 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 16:48:29,150 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 16:48:29,151 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 16:48:29,151 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 16:48:29,152 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 [2018-10-24 16:48:29,179 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:48:29,181 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:48:29,182 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:48:29,182 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:48:29,183 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:48:29,183 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:48:29,183 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:48:29,184 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:48:29,185 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:48:29,185 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:48:29,185 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:48:29,185 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:48:29,185 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:48:29,185 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:48:29,186 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:48:29,186 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:48:29,186 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:48:29,186 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:48:29,186 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:48:29,186 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:48:29,188 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:48:29,188 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:48:29,188 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:48:29,188 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:48:29,188 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:48:29,189 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:48:29,189 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:48:29,189 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:48:29,256 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:48:29,274 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:48:29,279 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:48:29,280 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:48:29,281 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:48:29,281 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label27_true-unreach-call.c [2018-10-24 16:48:29,352 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9be5bb002/983a3633be77488ebc16450a2160526d/FLAG11ea9ee1a [2018-10-24 16:48:30,104 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:48:30,104 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label27_true-unreach-call.c [2018-10-24 16:48:30,127 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9be5bb002/983a3633be77488ebc16450a2160526d/FLAG11ea9ee1a [2018-10-24 16:48:30,143 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9be5bb002/983a3633be77488ebc16450a2160526d [2018-10-24 16:48:30,155 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:48:30,157 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:48:30,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:48:30,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:48:30,162 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:48:30,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:48:30" (1/1) ... [2018-10-24 16:48:30,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4621111d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:30, skipping insertion in model container [2018-10-24 16:48:30,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:48:30" (1/1) ... [2018-10-24 16:48:30,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:48:30,307 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:48:31,234 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:48:31,239 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:48:31,689 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:48:31,712 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:48:31,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:31 WrapperNode [2018-10-24 16:48:31,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:48:31,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:48:31,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:48:31,714 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:48:31,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:31" (1/1) ... [2018-10-24 16:48:31,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:31" (1/1) ... [2018-10-24 16:48:32,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:48:32,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:48:32,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:48:32,254 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:48:32,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:31" (1/1) ... [2018-10-24 16:48:32,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:31" (1/1) ... [2018-10-24 16:48:32,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:31" (1/1) ... [2018-10-24 16:48:32,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:31" (1/1) ... [2018-10-24 16:48:32,424 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:31" (1/1) ... [2018-10-24 16:48:32,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:31" (1/1) ... [2018-10-24 16:48:32,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:31" (1/1) ... [2018-10-24 16:48:32,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:48:32,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:48:32,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:48:32,611 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:48:32,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:31" (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 [2018-10-24 16:48:32,683 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:48:32,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:48:32,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:48:41,927 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:48:41,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:48:41 BoogieIcfgContainer [2018-10-24 16:48:41,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:48:41,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:48:41,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:48:41,935 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:48:41,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:48:30" (1/3) ... [2018-10-24 16:48:41,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10c1c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:48:41, skipping insertion in model container [2018-10-24 16:48:41,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:48:31" (2/3) ... [2018-10-24 16:48:41,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10c1c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:48:41, skipping insertion in model container [2018-10-24 16:48:41,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:48:41" (3/3) ... [2018-10-24 16:48:41,940 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label27_true-unreach-call.c [2018-10-24 16:48:41,951 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:48:41,963 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:48:41,981 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:48:42,022 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:48:42,022 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:48:42,023 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:48:42,023 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:48:42,023 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:48:42,023 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:48:42,023 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:48:42,023 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:48:42,023 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:48:42,060 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states. [2018-10-24 16:48:42,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-24 16:48:42,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:48:42,071 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] [2018-10-24 16:48:42,073 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:48:42,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:48:42,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1057203130, now seen corresponding path program 1 times [2018-10-24 16:48:42,082 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:48:42,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:48:42,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:48:42,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:48:42,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:48:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:48:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:48:42,549 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:48:42,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:48:42,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:48:42,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:48:42,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:48:42,576 INFO L87 Difference]: Start difference. First operand 591 states. Second operand 4 states. [2018-10-24 16:48:52,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:48:52,734 INFO L93 Difference]: Finished difference Result 2124 states and 3951 transitions. [2018-10-24 16:48:52,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:48:52,737 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-10-24 16:48:52,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:48:52,778 INFO L225 Difference]: With dead ends: 2124 [2018-10-24 16:48:52,779 INFO L226 Difference]: Without dead ends: 1526 [2018-10-24 16:48:52,786 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 [2018-10-24 16:48:52,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2018-10-24 16:48:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1032. [2018-10-24 16:48:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2018-10-24 16:48:52,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1858 transitions. [2018-10-24 16:48:52,908 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1858 transitions. Word has length 42 [2018-10-24 16:48:52,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:48:52,908 INFO L481 AbstractCegarLoop]: Abstraction has 1032 states and 1858 transitions. [2018-10-24 16:48:52,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:48:52,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1858 transitions. [2018-10-24 16:48:52,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-24 16:48:52,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:48:52,916 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:48:52,916 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:48:52,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:48:52,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1079967214, now seen corresponding path program 1 times [2018-10-24 16:48:52,917 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:48:52,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:48:52,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:48:52,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:48:52,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:48:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:48:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:48:53,195 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:48:53,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:48:53,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:48:53,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:48:53,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:48:53,198 INFO L87 Difference]: Start difference. First operand 1032 states and 1858 transitions. Second operand 4 states. [2018-10-24 16:48:59,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:48:59,900 INFO L93 Difference]: Finished difference Result 2924 states and 5354 transitions. [2018-10-24 16:48:59,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:48:59,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2018-10-24 16:48:59,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:48:59,912 INFO L225 Difference]: With dead ends: 2924 [2018-10-24 16:48:59,912 INFO L226 Difference]: Without dead ends: 1894 [2018-10-24 16:48:59,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:48:59,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2018-10-24 16:48:59,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1894. [2018-10-24 16:48:59,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1894 states. [2018-10-24 16:48:59,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 2838 transitions. [2018-10-24 16:48:59,972 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 2838 transitions. Word has length 110 [2018-10-24 16:48:59,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:48:59,973 INFO L481 AbstractCegarLoop]: Abstraction has 1894 states and 2838 transitions. [2018-10-24 16:48:59,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:48:59,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 2838 transitions. [2018-10-24 16:48:59,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-24 16:48:59,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:48:59,976 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:48:59,976 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:48:59,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:48:59,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2142067975, now seen corresponding path program 1 times [2018-10-24 16:48:59,977 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:48:59,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:48:59,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:48:59,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:48:59,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:49:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:49:00,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:49:00,393 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 [2018-10-24 16:49:00,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:49:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:49:00,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:49:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:49:00,846 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:49:00,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-24 16:49:00,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:49:00,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:49:00,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:49:00,849 INFO L87 Difference]: Start difference. First operand 1894 states and 2838 transitions. Second operand 6 states. [2018-10-24 16:49:15,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:49:15,403 INFO L93 Difference]: Finished difference Result 9410 states and 14055 transitions. [2018-10-24 16:49:15,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 16:49:15,409 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2018-10-24 16:49:15,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:49:15,438 INFO L225 Difference]: With dead ends: 9410 [2018-10-24 16:49:15,438 INFO L226 Difference]: Without dead ends: 5774 [2018-10-24 16:49:15,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:49:15,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5774 states. [2018-10-24 16:49:15,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5774 to 4910. [2018-10-24 16:49:15,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4910 states. [2018-10-24 16:49:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 6417 transitions. [2018-10-24 16:49:15,542 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 6417 transitions. Word has length 113 [2018-10-24 16:49:15,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:49:15,542 INFO L481 AbstractCegarLoop]: Abstraction has 4910 states and 6417 transitions. [2018-10-24 16:49:15,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 16:49:15,543 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 6417 transitions. [2018-10-24 16:49:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-24 16:49:15,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:49:15,548 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:49:15,548 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:49:15,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:49:15,548 INFO L82 PathProgramCache]: Analyzing trace with hash 300432979, now seen corresponding path program 1 times [2018-10-24 16:49:15,548 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:49:15,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:49:15,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:15,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:49:15,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:49:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:49:15,760 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:49:15,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:49:15,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:49:15,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:49:15,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:49:15,762 INFO L87 Difference]: Start difference. First operand 4910 states and 6417 transitions. Second operand 4 states. [2018-10-24 16:49:20,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:49:20,462 INFO L93 Difference]: Finished difference Result 12370 states and 16715 transitions. [2018-10-24 16:49:20,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:49:20,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 200 [2018-10-24 16:49:20,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:49:20,500 INFO L225 Difference]: With dead ends: 12370 [2018-10-24 16:49:20,500 INFO L226 Difference]: Without dead ends: 7897 [2018-10-24 16:49:20,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:49:20,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7897 states. [2018-10-24 16:49:20,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7897 to 7471. [2018-10-24 16:49:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7471 states. [2018-10-24 16:49:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7471 states to 7471 states and 9537 transitions. [2018-10-24 16:49:20,633 INFO L78 Accepts]: Start accepts. Automaton has 7471 states and 9537 transitions. Word has length 200 [2018-10-24 16:49:20,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:49:20,634 INFO L481 AbstractCegarLoop]: Abstraction has 7471 states and 9537 transitions. [2018-10-24 16:49:20,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:49:20,634 INFO L276 IsEmpty]: Start isEmpty. Operand 7471 states and 9537 transitions. [2018-10-24 16:49:20,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-10-24 16:49:20,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:49:20,647 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, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-24 16:49:20,647 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:49:20,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:49:20,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1648358704, now seen corresponding path program 1 times [2018-10-24 16:49:20,648 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:49:20,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:49:20,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:20,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:49:20,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:49:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 363 proven. 83 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-10-24 16:49:21,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:49:21,156 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 [2018-10-24 16:49:21,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:49:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:49:21,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:49:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 363 proven. 83 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-10-24 16:49:21,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:49:21,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2018-10-24 16:49:21,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:49:21,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:49:21,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:49:21,510 INFO L87 Difference]: Start difference. First operand 7471 states and 9537 transitions. Second operand 7 states. [2018-10-24 16:49:39,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:49:39,677 INFO L93 Difference]: Finished difference Result 29069 states and 36237 transitions. [2018-10-24 16:49:39,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:49:39,678 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 368 [2018-10-24 16:49:39,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:49:39,728 INFO L225 Difference]: With dead ends: 29069 [2018-10-24 16:49:39,728 INFO L226 Difference]: Without dead ends: 16374 [2018-10-24 16:49:39,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-24 16:49:39,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16374 states. [2018-10-24 16:49:39,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16374 to 15932. [2018-10-24 16:49:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15932 states. [2018-10-24 16:49:39,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15932 states to 15932 states and 18244 transitions. [2018-10-24 16:49:39,981 INFO L78 Accepts]: Start accepts. Automaton has 15932 states and 18244 transitions. Word has length 368 [2018-10-24 16:49:39,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:49:39,981 INFO L481 AbstractCegarLoop]: Abstraction has 15932 states and 18244 transitions. [2018-10-24 16:49:39,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 16:49:39,982 INFO L276 IsEmpty]: Start isEmpty. Operand 15932 states and 18244 transitions. [2018-10-24 16:49:40,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2018-10-24 16:49:40,008 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:49:40,008 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:49:40,009 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:49:40,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:49:40,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1984007499, now seen corresponding path program 1 times [2018-10-24 16:49:40,009 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:49:40,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:49:40,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:40,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:49:40,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:49:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 484 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-10-24 16:49:40,683 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:49:40,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:49:40,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:49:40,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:49:40,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:49:40,685 INFO L87 Difference]: Start difference. First operand 15932 states and 18244 transitions. Second operand 3 states. [2018-10-24 16:49:44,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:49:44,109 INFO L93 Difference]: Finished difference Result 36980 states and 42526 transitions. [2018-10-24 16:49:44,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:49:44,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 648 [2018-10-24 16:49:44,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:49:44,152 INFO L225 Difference]: With dead ends: 36980 [2018-10-24 16:49:44,153 INFO L226 Difference]: Without dead ends: 21476 [2018-10-24 16:49:44,169 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 [2018-10-24 16:49:44,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21476 states. [2018-10-24 16:49:44,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21476 to 20194. [2018-10-24 16:49:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20194 states. [2018-10-24 16:49:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20194 states to 20194 states and 22945 transitions. [2018-10-24 16:49:44,426 INFO L78 Accepts]: Start accepts. Automaton has 20194 states and 22945 transitions. Word has length 648 [2018-10-24 16:49:44,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:49:44,428 INFO L481 AbstractCegarLoop]: Abstraction has 20194 states and 22945 transitions. [2018-10-24 16:49:44,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:49:44,428 INFO L276 IsEmpty]: Start isEmpty. Operand 20194 states and 22945 transitions. [2018-10-24 16:49:44,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 674 [2018-10-24 16:49:44,465 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:49:44,465 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:49:44,465 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:49:44,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:49:44,466 INFO L82 PathProgramCache]: Analyzing trace with hash -5632952, now seen corresponding path program 1 times [2018-10-24 16:49:44,466 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:49:44,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:49:44,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:44,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:49:44,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:49:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 588 proven. 0 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-10-24 16:49:45,054 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:49:45,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:49:45,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:49:45,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:49:45,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:49:45,055 INFO L87 Difference]: Start difference. First operand 20194 states and 22945 transitions. Second operand 3 states. [2018-10-24 16:49:48,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:49:48,750 INFO L93 Difference]: Finished difference Result 54454 states and 61884 transitions. [2018-10-24 16:49:48,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:49:48,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 673 [2018-10-24 16:49:48,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:49:48,809 INFO L225 Difference]: With dead ends: 54454 [2018-10-24 16:49:48,809 INFO L226 Difference]: Without dead ends: 34688 [2018-10-24 16:49:48,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:49:48,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34688 states. [2018-10-24 16:49:49,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34688 to 33820. [2018-10-24 16:49:49,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33820 states. [2018-10-24 16:49:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33820 states to 33820 states and 38340 transitions. [2018-10-24 16:49:49,471 INFO L78 Accepts]: Start accepts. Automaton has 33820 states and 38340 transitions. Word has length 673 [2018-10-24 16:49:49,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:49:49,472 INFO L481 AbstractCegarLoop]: Abstraction has 33820 states and 38340 transitions. [2018-10-24 16:49:49,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:49:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 33820 states and 38340 transitions. [2018-10-24 16:49:49,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2018-10-24 16:49:49,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:49:49,515 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:49:49,515 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:49:49,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:49:49,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1300457331, now seen corresponding path program 1 times [2018-10-24 16:49:49,516 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:49:49,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:49:49,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:49,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:49:49,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:49:50,601 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2018-10-24 16:49:50,602 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:49:50,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:49:50,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:49:50,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:49:50,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:49:50,604 INFO L87 Difference]: Start difference. First operand 33820 states and 38340 transitions. Second operand 3 states. [2018-10-24 16:49:55,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:49:55,646 INFO L93 Difference]: Finished difference Result 80847 states and 91948 transitions. [2018-10-24 16:49:55,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:49:55,647 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 811 [2018-10-24 16:49:55,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:49:55,700 INFO L225 Difference]: With dead ends: 80847 [2018-10-24 16:49:55,700 INFO L226 Difference]: Without dead ends: 47455 [2018-10-24 16:49:55,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:49:55,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47455 states. [2018-10-24 16:49:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47455 to 46599. [2018-10-24 16:49:56,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46599 states. [2018-10-24 16:49:56,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46599 states to 46599 states and 51898 transitions. [2018-10-24 16:49:56,252 INFO L78 Accepts]: Start accepts. Automaton has 46599 states and 51898 transitions. Word has length 811 [2018-10-24 16:49:56,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:49:56,254 INFO L481 AbstractCegarLoop]: Abstraction has 46599 states and 51898 transitions. [2018-10-24 16:49:56,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:49:56,254 INFO L276 IsEmpty]: Start isEmpty. Operand 46599 states and 51898 transitions. [2018-10-24 16:49:56,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 854 [2018-10-24 16:49:56,310 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:49:56,311 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:49:56,311 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:49:56,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:49:56,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1397390877, now seen corresponding path program 1 times [2018-10-24 16:49:56,312 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:49:56,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:49:56,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:56,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:49:56,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:49:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:49:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 159 proven. 572 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-10-24 16:49:59,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:49:59,048 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 [2018-10-24 16:49:59,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:49:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:49:59,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:49:59,608 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 14 [2018-10-24 16:50:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 491 proven. 241 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-10-24 16:50:01,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:50:01,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-10-24 16:50:01,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 16:50:01,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 16:50:01,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:50:01,390 INFO L87 Difference]: Start difference. First operand 46599 states and 51898 transitions. Second operand 8 states. [2018-10-24 16:50:12,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:50:12,628 INFO L93 Difference]: Finished difference Result 105570 states and 116944 transitions. [2018-10-24 16:50:12,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 16:50:12,629 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 853 [2018-10-24 16:50:12,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:50:12,697 INFO L225 Difference]: With dead ends: 105570 [2018-10-24 16:50:12,697 INFO L226 Difference]: Without dead ends: 57689 [2018-10-24 16:50:12,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 859 GetRequests, 851 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:50:12,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57689 states. [2018-10-24 16:50:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57689 to 42747. [2018-10-24 16:50:13,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42747 states. [2018-10-24 16:50:13,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42747 states to 42747 states and 46674 transitions. [2018-10-24 16:50:13,243 INFO L78 Accepts]: Start accepts. Automaton has 42747 states and 46674 transitions. Word has length 853 [2018-10-24 16:50:13,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:50:13,245 INFO L481 AbstractCegarLoop]: Abstraction has 42747 states and 46674 transitions. [2018-10-24 16:50:13,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 16:50:13,245 INFO L276 IsEmpty]: Start isEmpty. Operand 42747 states and 46674 transitions. [2018-10-24 16:50:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 900 [2018-10-24 16:50:13,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:50:13,275 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2018-10-24 16:50:13,275 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:50:13,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:50:13,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2134074976, now seen corresponding path program 1 times [2018-10-24 16:50:13,276 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:50:13,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:50:13,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:13,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:50:13,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:50:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1308 backedges. 1036 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-10-24 16:50:14,736 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:50:14,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:50:14,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:50:14,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:50:14,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:50:14,738 INFO L87 Difference]: Start difference. First operand 42747 states and 46674 transitions. Second operand 5 states. [2018-10-24 16:50:20,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:50:20,471 INFO L93 Difference]: Finished difference Result 100437 states and 109718 transitions. [2018-10-24 16:50:20,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:50:20,471 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 899 [2018-10-24 16:50:20,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:50:20,527 INFO L225 Difference]: With dead ends: 100437 [2018-10-24 16:50:20,527 INFO L226 Difference]: Without dead ends: 58118 [2018-10-24 16:50:20,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:50:20,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58118 states. [2018-10-24 16:50:20,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58118 to 45314. [2018-10-24 16:50:20,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45314 states. [2018-10-24 16:50:21,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45314 states to 45314 states and 49490 transitions. [2018-10-24 16:50:21,001 INFO L78 Accepts]: Start accepts. Automaton has 45314 states and 49490 transitions. Word has length 899 [2018-10-24 16:50:21,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:50:21,002 INFO L481 AbstractCegarLoop]: Abstraction has 45314 states and 49490 transitions. [2018-10-24 16:50:21,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:50:21,002 INFO L276 IsEmpty]: Start isEmpty. Operand 45314 states and 49490 transitions. [2018-10-24 16:50:21,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 901 [2018-10-24 16:50:21,030 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:50:21,031 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2018-10-24 16:50:21,031 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:50:21,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:50:21,032 INFO L82 PathProgramCache]: Analyzing trace with hash -504770416, now seen corresponding path program 1 times [2018-10-24 16:50:21,032 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:50:21,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:50:21,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:21,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:50:21,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:50:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 759 proven. 490 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-10-24 16:50:25,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:50:25,912 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 [2018-10-24 16:50:25,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:50:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:50:26,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:50:27,051 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-24 16:50:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 976 proven. 246 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2018-10-24 16:50:28,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:50:28,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 17 [2018-10-24 16:50:28,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-24 16:50:28,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-24 16:50:28,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-10-24 16:50:28,653 INFO L87 Difference]: Start difference. First operand 45314 states and 49490 transitions. Second operand 17 states. [2018-10-24 16:50:28,890 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2018-10-24 16:50:40,281 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2018-10-24 16:50:42,022 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2018-10-24 16:50:56,150 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2018-10-24 16:51:02,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:51:02,685 INFO L93 Difference]: Finished difference Result 112694 states and 122941 transitions. [2018-10-24 16:51:02,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-24 16:51:02,691 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 900 [2018-10-24 16:51:02,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:51:02,751 INFO L225 Difference]: With dead ends: 112694 [2018-10-24 16:51:02,752 INFO L226 Difference]: Without dead ends: 67805 [2018-10-24 16:51:02,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1022 GetRequests, 948 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1797 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1167, Invalid=3945, Unknown=0, NotChecked=0, Total=5112 [2018-10-24 16:51:02,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67805 states. [2018-10-24 16:51:03,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67805 to 58201. [2018-10-24 16:51:03,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58201 states. [2018-10-24 16:51:03,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58201 states to 58201 states and 61778 transitions. [2018-10-24 16:51:03,343 INFO L78 Accepts]: Start accepts. Automaton has 58201 states and 61778 transitions. Word has length 900 [2018-10-24 16:51:03,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:51:03,344 INFO L481 AbstractCegarLoop]: Abstraction has 58201 states and 61778 transitions. [2018-10-24 16:51:03,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-24 16:51:03,344 INFO L276 IsEmpty]: Start isEmpty. Operand 58201 states and 61778 transitions. [2018-10-24 16:51:03,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1071 [2018-10-24 16:51:03,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:51:03,381 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:51:03,381 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:51:03,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:51:03,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1563677524, now seen corresponding path program 1 times [2018-10-24 16:51:03,382 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:51:03,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:51:03,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:51:03,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:51:03,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:51:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:51:04,354 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 5 [2018-10-24 16:51:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1949 backedges. 1177 proven. 241 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2018-10-24 16:51:05,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:51:05,385 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:51:05,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:51:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:51:05,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:51:08,586 WARN L179 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 113 DAG size of output: 16 [2018-10-24 16:51:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1949 backedges. 1336 proven. 0 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2018-10-24 16:51:09,318 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:51:09,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2018-10-24 16:51:09,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:51:09,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:51:09,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:51:09,320 INFO L87 Difference]: Start difference. First operand 58201 states and 61778 transitions. Second operand 7 states. Received shutdown request... [2018-10-24 16:52:34,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-24 16:52:34,600 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:52:34,606 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:52:34,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:52:34 BoogieIcfgContainer [2018-10-24 16:52:34,606 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:52:34,607 INFO L168 Benchmark]: Toolchain (without parser) took 244451.27 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -257.7 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-10-24 16:52:34,608 INFO L168 Benchmark]: CDTParser took 0.25 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. [2018-10-24 16:52:34,609 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1555.09 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-24 16:52:34,610 INFO L168 Benchmark]: Boogie Procedure Inliner took 539.53 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 798.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -924.6 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2018-10-24 16:52:34,611 INFO L168 Benchmark]: Boogie Preprocessor took 357.26 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 7.1 GB. [2018-10-24 16:52:34,612 INFO L168 Benchmark]: RCFGBuilder took 9317.83 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 483.1 MB). Peak memory consumption was 483.1 MB. Max. memory is 7.1 GB. [2018-10-24 16:52:34,612 INFO L168 Benchmark]: TraceAbstraction took 232674.71 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 1.7 GB in the end (delta: 18.9 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-10-24 16:52:34,618 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 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 1555.09 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 539.53 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 798.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -924.6 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 357.26 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9317.83 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 483.1 MB). Peak memory consumption was 483.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 232674.71 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 1.7 GB in the end (delta: 18.9 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 131]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 131). Cancelled while BasicCegarLoop was constructing difference of abstraction (58201states) and FLOYD_HOARE automaton (currently 17 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (89155 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 591 locations, 1 error locations. TIMEOUT Result, 232.5s OverallTime, 12 OverallIterations, 7 TraceHistogramMax, 203.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3555 SDtfs, 36096 SDslu, 2575 SDs, 0 SdLazy, 62768 SolverSat, 11566 SolverUnsat, 27 SolverUnknown, 0 SolverNotchecked, 179.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3491 GetRequests, 3368 SyntacticMatches, 8 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1848 ImplicationChecksByTransitivity, 11.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58201occurred in iteration=11, 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: 3.5s AutomataMinimizationTime, 11 MinimizatonAttempts, 42582 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 15.3s InterpolantComputationTime, 9991 NumberOfCodeBlocks, 9991 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 9974 ConstructedInterpolants, 323 QuantifiedInterpolants, 44021252 SizeOfPredicates, 5 NumberOfNonLiveVariables, 4021 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 17 InterpolantComputations, 9 PerfectInterpolantSequences, 11641/13636 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown