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_label06_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 14:00:37,163 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 14:00:37,165 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 14:00:37,177 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 14:00:37,178 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 14:00:37,179 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 14:00:37,180 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 14:00:37,182 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 14:00:37,184 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 14:00:37,185 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 14:00:37,187 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 14:00:37,187 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 14:00:37,190 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 14:00:37,191 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 14:00:37,192 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 14:00:37,196 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 14:00:37,197 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 14:00:37,206 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 14:00:37,211 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 14:00:37,215 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 14:00:37,216 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 14:00:37,218 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 14:00:37,220 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 14:00:37,220 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 14:00:37,220 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 14:00:37,221 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 14:00:37,222 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 14:00:37,223 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 14:00:37,224 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 14:00:37,225 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 14:00:37,225 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 14:00:37,226 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 14:00:37,227 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 14:00:37,227 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 14:00:37,228 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 14:00:37,229 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 14:00:37,230 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 14:00:37,249 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 14:00:37,249 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 14:00:37,250 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 14:00:37,250 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 14:00:37,251 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 14:00:37,251 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 14:00:37,251 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 14:00:37,251 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 14:00:37,251 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 14:00:37,252 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 14:00:37,252 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 14:00:37,252 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 14:00:37,252 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 14:00:37,252 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 14:00:37,253 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 14:00:37,253 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 14:00:37,253 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 14:00:37,253 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 14:00:37,253 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 14:00:37,254 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:00:37,254 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 14:00:37,254 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 14:00:37,254 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 14:00:37,254 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 14:00:37,255 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 14:00:37,255 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 14:00:37,255 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 14:00:37,255 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 14:00:37,299 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 14:00:37,313 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 14:00:37,317 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 14:00:37,318 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 14:00:37,319 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 14:00:37,320 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label06_false-unreach-call.c [2018-10-24 14:00:37,382 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3dae6737d/e7d8188f238d47eaae8e9fb9abb7932e/FLAG7c42e5f53 [2018-10-24 14:00:38,211 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 14:00:38,212 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label06_false-unreach-call.c [2018-10-24 14:00:38,242 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3dae6737d/e7d8188f238d47eaae8e9fb9abb7932e/FLAG7c42e5f53 [2018-10-24 14:00:38,260 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3dae6737d/e7d8188f238d47eaae8e9fb9abb7932e [2018-10-24 14:00:38,273 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 14:00:38,275 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 14:00:38,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 14:00:38,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 14:00:38,281 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 14:00:38,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:00:38" (1/1) ... [2018-10-24 14:00:38,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@639b200f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:38, skipping insertion in model container [2018-10-24 14:00:38,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:00:38" (1/1) ... [2018-10-24 14:00:38,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 14:00:38,469 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 14:00:39,861 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:00:39,866 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 14:00:40,419 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:00:40,449 INFO L193 MainTranslator]: Completed translation [2018-10-24 14:00:40,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:40 WrapperNode [2018-10-24 14:00:40,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 14:00:40,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 14:00:40,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 14:00:40,451 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 14:00:40,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:40" (1/1) ... [2018-10-24 14:00:40,526 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:40" (1/1) ... [2018-10-24 14:00:41,088 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 14:00:41,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 14:00:41,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 14:00:41,089 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 14:00:41,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:40" (1/1) ... [2018-10-24 14:00:41,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:40" (1/1) ... [2018-10-24 14:00:41,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:40" (1/1) ... [2018-10-24 14:00:41,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:40" (1/1) ... [2018-10-24 14:00:41,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:40" (1/1) ... [2018-10-24 14:00:41,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:40" (1/1) ... [2018-10-24 14:00:41,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:40" (1/1) ... [2018-10-24 14:00:41,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 14:00:41,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 14:00:41,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 14:00:41,383 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 14:00:41,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:40" (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 14:00:41,465 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 14:00:41,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 14:00:41,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 14:00:50,506 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 14:00:50,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:00:50 BoogieIcfgContainer [2018-10-24 14:00:50,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 14:00:50,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 14:00:50,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 14:00:50,511 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 14:00:50,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:00:38" (1/3) ... [2018-10-24 14:00:50,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e724f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:00:50, skipping insertion in model container [2018-10-24 14:00:50,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:00:40" (2/3) ... [2018-10-24 14:00:50,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e724f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:00:50, skipping insertion in model container [2018-10-24 14:00:50,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:00:50" (3/3) ... [2018-10-24 14:00:50,515 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label06_false-unreach-call.c [2018-10-24 14:00:50,525 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 14:00:50,534 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 14:00:50,551 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 14:00:50,595 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 14:00:50,596 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 14:00:50,596 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 14:00:50,596 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 14:00:50,596 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 14:00:50,596 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 14:00:50,596 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 14:00:50,596 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 14:00:50,597 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 14:00:50,631 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states. [2018-10-24 14:00:50,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-24 14:00:50,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:00:50,640 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] [2018-10-24 14:00:50,642 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:00:50,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:00:50,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1155896462, now seen corresponding path program 1 times [2018-10-24 14:00:50,650 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:00:50,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:00:50,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:50,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:00:50,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:00:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:00:51,069 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-10-24 14:00:51,075 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 14:00:51,078 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:00:51,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:00:51,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:00:51,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:00:51,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:00:51,096 INFO L87 Difference]: Start difference. First operand 819 states. Second operand 4 states. [2018-10-24 14:01:02,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:01:02,259 INFO L93 Difference]: Finished difference Result 3162 states and 6150 transitions. [2018-10-24 14:01:02,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:01:02,262 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2018-10-24 14:01:02,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:01:02,308 INFO L225 Difference]: With dead ends: 3162 [2018-10-24 14:01:02,308 INFO L226 Difference]: Without dead ends: 2336 [2018-10-24 14:01:02,317 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 [2018-10-24 14:01:02,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2018-10-24 14:01:02,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2336. [2018-10-24 14:01:02,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2336 states. [2018-10-24 14:01:02,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 3769 transitions. [2018-10-24 14:01:02,476 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 3769 transitions. Word has length 24 [2018-10-24 14:01:02,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:01:02,476 INFO L481 AbstractCegarLoop]: Abstraction has 2336 states and 3769 transitions. [2018-10-24 14:01:02,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:01:02,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 3769 transitions. [2018-10-24 14:01:02,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-24 14:01:02,481 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:01:02,482 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:01:02,482 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:01:02,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:01:02,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1814416017, now seen corresponding path program 1 times [2018-10-24 14:01:02,482 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:01:02,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:01:02,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:01:02,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:01:02,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:01:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:01:03,095 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2018-10-24 14:01:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:01:03,298 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:01:03,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 14:01:03,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 14:01:03,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 14:01:03,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 14:01:03,301 INFO L87 Difference]: Start difference. First operand 2336 states and 3769 transitions. Second operand 6 states. [2018-10-24 14:01:20,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:01:20,517 INFO L93 Difference]: Finished difference Result 9183 states and 14416 transitions. [2018-10-24 14:01:20,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:01:20,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2018-10-24 14:01:20,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:01:20,553 INFO L225 Difference]: With dead ends: 9183 [2018-10-24 14:01:20,553 INFO L226 Difference]: Without dead ends: 6849 [2018-10-24 14:01:20,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:01:20,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6849 states. [2018-10-24 14:01:20,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6849 to 6849. [2018-10-24 14:01:20,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6849 states. [2018-10-24 14:01:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6849 states to 6849 states and 9754 transitions. [2018-10-24 14:01:20,706 INFO L78 Accepts]: Start accepts. Automaton has 6849 states and 9754 transitions. Word has length 101 [2018-10-24 14:01:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:01:20,707 INFO L481 AbstractCegarLoop]: Abstraction has 6849 states and 9754 transitions. [2018-10-24 14:01:20,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 14:01:20,707 INFO L276 IsEmpty]: Start isEmpty. Operand 6849 states and 9754 transitions. [2018-10-24 14:01:20,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-24 14:01:20,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:01:20,715 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:01:20,715 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:01:20,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:01:20,715 INFO L82 PathProgramCache]: Analyzing trace with hash -143512201, now seen corresponding path program 1 times [2018-10-24 14:01:20,715 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:01:20,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:01:20,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:01:20,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:01:20,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:01:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:01:21,304 WARN L179 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2018-10-24 14:01:21,482 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 9 [2018-10-24 14:01:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 109 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:01:21,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:01:21,754 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 14:01:21,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:01:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:01:21,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:01:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:01:22,101 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:01:22,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-24 14:01:22,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 14:01:22,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 14:01:22,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:01:22,107 INFO L87 Difference]: Start difference. First operand 6849 states and 9754 transitions. Second operand 7 states. [2018-10-24 14:01:41,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:01:41,169 INFO L93 Difference]: Finished difference Result 28768 states and 40519 transitions. [2018-10-24 14:01:41,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 14:01:41,176 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 203 [2018-10-24 14:01:41,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:01:41,264 INFO L225 Difference]: With dead ends: 28768 [2018-10-24 14:01:41,265 INFO L226 Difference]: Without dead ends: 18909 [2018-10-24 14:01:41,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-24 14:01:41,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18909 states. [2018-10-24 14:01:41,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18909 to 14367. [2018-10-24 14:01:41,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14367 states. [2018-10-24 14:01:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14367 states to 14367 states and 17896 transitions. [2018-10-24 14:01:41,595 INFO L78 Accepts]: Start accepts. Automaton has 14367 states and 17896 transitions. Word has length 203 [2018-10-24 14:01:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:01:41,596 INFO L481 AbstractCegarLoop]: Abstraction has 14367 states and 17896 transitions. [2018-10-24 14:01:41,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 14:01:41,596 INFO L276 IsEmpty]: Start isEmpty. Operand 14367 states and 17896 transitions. [2018-10-24 14:01:41,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-24 14:01:41,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:01:41,815 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:01:41,815 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:01:41,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:01:41,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1620461169, now seen corresponding path program 1 times [2018-10-24 14:01:41,817 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:01:41,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:01:41,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:01:41,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:01:41,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:01:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:01:42,211 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-24 14:01:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:01:42,266 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:01:42,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:01:42,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:01:42,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:01:42,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:01:42,267 INFO L87 Difference]: Start difference. First operand 14367 states and 17896 transitions. Second operand 4 states. [2018-10-24 14:01:53,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:01:53,063 INFO L93 Difference]: Finished difference Result 49788 states and 63216 transitions. [2018-10-24 14:01:53,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:01:53,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 258 [2018-10-24 14:01:53,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:01:53,131 INFO L225 Difference]: With dead ends: 49788 [2018-10-24 14:01:53,132 INFO L226 Difference]: Without dead ends: 35423 [2018-10-24 14:01:53,153 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 [2018-10-24 14:01:53,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35423 states. [2018-10-24 14:01:53,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35423 to 35423. [2018-10-24 14:01:53,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35423 states. [2018-10-24 14:01:53,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35423 states to 35423 states and 43956 transitions. [2018-10-24 14:01:53,660 INFO L78 Accepts]: Start accepts. Automaton has 35423 states and 43956 transitions. Word has length 258 [2018-10-24 14:01:53,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:01:53,661 INFO L481 AbstractCegarLoop]: Abstraction has 35423 states and 43956 transitions. [2018-10-24 14:01:53,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:01:53,662 INFO L276 IsEmpty]: Start isEmpty. Operand 35423 states and 43956 transitions. [2018-10-24 14:01:53,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-10-24 14:01:53,670 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:01:53,670 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:01:53,670 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:01:53,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:01:53,671 INFO L82 PathProgramCache]: Analyzing trace with hash 401768632, now seen corresponding path program 1 times [2018-10-24 14:01:53,671 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:01:53,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:01:53,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:01:53,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:01:53,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:01:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:01:54,424 WARN L179 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2018-10-24 14:01:54,883 WARN L179 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2018-10-24 14:01:55,211 WARN L179 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2018-10-24 14:01:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 44 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:01:55,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:01:55,625 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 14:01:55,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:01:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:01:55,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:01:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 85 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:01:55,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:01:55,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 7 [2018-10-24 14:01:55,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 14:01:55,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 14:01:55,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 14:01:55,967 INFO L87 Difference]: Start difference. First operand 35423 states and 43956 transitions. Second operand 8 states. [2018-10-24 14:02:12,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:02:12,850 INFO L93 Difference]: Finished difference Result 104684 states and 131693 transitions. [2018-10-24 14:02:12,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 14:02:12,861 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 280 [2018-10-24 14:02:12,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:02:12,968 INFO L225 Difference]: With dead ends: 104684 [2018-10-24 14:02:12,969 INFO L226 Difference]: Without dead ends: 66253 [2018-10-24 14:02:13,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-10-24 14:02:13,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66253 states. [2018-10-24 14:02:13,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66253 to 60989. [2018-10-24 14:02:13,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60989 states. [2018-10-24 14:02:13,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60989 states to 60989 states and 74050 transitions. [2018-10-24 14:02:13,729 INFO L78 Accepts]: Start accepts. Automaton has 60989 states and 74050 transitions. Word has length 280 [2018-10-24 14:02:13,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:02:13,730 INFO L481 AbstractCegarLoop]: Abstraction has 60989 states and 74050 transitions. [2018-10-24 14:02:13,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 14:02:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 60989 states and 74050 transitions. [2018-10-24 14:02:13,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-24 14:02:13,746 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:02:13,746 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:02:13,747 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:02:13,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:02:13,747 INFO L82 PathProgramCache]: Analyzing trace with hash -737792549, now seen corresponding path program 1 times [2018-10-24 14:02:13,747 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:02:13,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:02:13,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:13,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:02:13,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:02:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-10-24 14:02:14,146 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:02:14,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:02:14,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:02:14,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:02:14,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:02:14,148 INFO L87 Difference]: Start difference. First operand 60989 states and 74050 transitions. Second operand 3 states. [2018-10-24 14:02:20,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:02:20,583 INFO L93 Difference]: Finished difference Result 157320 states and 192508 transitions. [2018-10-24 14:02:20,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:02:20,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 303 [2018-10-24 14:02:20,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:02:20,738 INFO L225 Difference]: With dead ends: 157320 [2018-10-24 14:02:20,739 INFO L226 Difference]: Without dead ends: 97085 [2018-10-24 14:02:20,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 4 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 14:02:20,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97085 states. [2018-10-24 14:02:21,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97085 to 97085. [2018-10-24 14:02:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97085 states. [2018-10-24 14:02:21,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97085 states to 97085 states and 117470 transitions. [2018-10-24 14:02:21,688 INFO L78 Accepts]: Start accepts. Automaton has 97085 states and 117470 transitions. Word has length 303 [2018-10-24 14:02:21,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:02:21,689 INFO L481 AbstractCegarLoop]: Abstraction has 97085 states and 117470 transitions. [2018-10-24 14:02:21,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:02:21,689 INFO L276 IsEmpty]: Start isEmpty. Operand 97085 states and 117470 transitions. [2018-10-24 14:02:21,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2018-10-24 14:02:21,713 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:02:21,713 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-24 14:02:21,713 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:02:21,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:02:21,714 INFO L82 PathProgramCache]: Analyzing trace with hash -540361336, now seen corresponding path program 1 times [2018-10-24 14:02:21,714 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:02:21,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:02:21,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:21,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:02:21,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:02:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 543 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-24 14:02:22,089 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:02:22,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:02:22,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:02:22,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:02:22,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:02:22,091 INFO L87 Difference]: Start difference. First operand 97085 states and 117470 transitions. Second operand 4 states. [2018-10-24 14:02:30,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:02:30,340 INFO L93 Difference]: Finished difference Result 232520 states and 280788 transitions. [2018-10-24 14:02:30,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:02:30,340 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 465 [2018-10-24 14:02:30,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:02:30,506 INFO L225 Difference]: With dead ends: 232520 [2018-10-24 14:02:30,506 INFO L226 Difference]: Without dead ends: 136189 [2018-10-24 14:02:30,578 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 14:02:30,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136189 states. [2018-10-24 14:02:31,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136189 to 132429. [2018-10-24 14:02:31,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132429 states. [2018-10-24 14:02:31,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132429 states to 132429 states and 152177 transitions. [2018-10-24 14:02:31,721 INFO L78 Accepts]: Start accepts. Automaton has 132429 states and 152177 transitions. Word has length 465 [2018-10-24 14:02:31,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:02:31,721 INFO L481 AbstractCegarLoop]: Abstraction has 132429 states and 152177 transitions. [2018-10-24 14:02:31,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:02:31,721 INFO L276 IsEmpty]: Start isEmpty. Operand 132429 states and 152177 transitions. [2018-10-24 14:02:31,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2018-10-24 14:02:31,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:02:31,743 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:02:31,743 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:02:31,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:02:31,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1975746954, now seen corresponding path program 1 times [2018-10-24 14:02:31,744 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:02:31,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:02:31,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:31,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:02:31,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:02:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 576 proven. 5 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-10-24 14:02:32,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:02:32,435 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 14:02:33,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:02:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:02:33,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:02:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2018-10-24 14:02:33,474 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:02:33,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-24 14:02:33,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:02:33,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:02:33,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:02:33,475 INFO L87 Difference]: Start difference. First operand 132429 states and 152177 transitions. Second operand 5 states. [2018-10-24 14:02:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:02:45,051 INFO L93 Difference]: Finished difference Result 268616 states and 308335 transitions. [2018-10-24 14:02:45,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:02:45,052 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 488 [2018-10-24 14:02:45,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:02:45,222 INFO L225 Difference]: With dead ends: 268616 [2018-10-24 14:02:45,222 INFO L226 Difference]: Without dead ends: 136941 [2018-10-24 14:02:45,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 489 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 14:02:45,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136941 states. [2018-10-24 14:02:46,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136941 to 133181. [2018-10-24 14:02:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133181 states. [2018-10-24 14:02:47,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133181 states to 133181 states and 148884 transitions. [2018-10-24 14:02:47,030 INFO L78 Accepts]: Start accepts. Automaton has 133181 states and 148884 transitions. Word has length 488 [2018-10-24 14:02:47,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:02:47,030 INFO L481 AbstractCegarLoop]: Abstraction has 133181 states and 148884 transitions. [2018-10-24 14:02:47,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:02:47,030 INFO L276 IsEmpty]: Start isEmpty. Operand 133181 states and 148884 transitions. [2018-10-24 14:02:47,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2018-10-24 14:02:47,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:02:47,047 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-24 14:02:47,047 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:02:47,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:02:47,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1308409374, now seen corresponding path program 1 times [2018-10-24 14:02:47,048 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:02:47,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:02:47,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:47,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:02:47,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:02:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 501 proven. 15 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-10-24 14:02:47,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:02:47,572 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 14:02:47,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:02:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:02:47,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:02:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2018-10-24 14:02:48,000 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:02:48,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-24 14:02:48,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:02:48,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:02:48,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:02:48,003 INFO L87 Difference]: Start difference. First operand 133181 states and 148884 transitions. Second operand 5 states. [2018-10-24 14:02:56,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:02:56,275 INFO L93 Difference]: Finished difference Result 305464 states and 340799 transitions. [2018-10-24 14:02:56,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:02:56,276 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 496 [2018-10-24 14:02:56,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:02:56,468 INFO L225 Difference]: With dead ends: 305464 [2018-10-24 14:02:56,468 INFO L226 Difference]: Without dead ends: 172284 [2018-10-24 14:02:56,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 496 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:02:56,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172284 states. [2018-10-24 14:02:57,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172284 to 164006. [2018-10-24 14:02:57,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164006 states. [2018-10-24 14:02:57,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164006 states to 164006 states and 176030 transitions. [2018-10-24 14:02:57,820 INFO L78 Accepts]: Start accepts. Automaton has 164006 states and 176030 transitions. Word has length 496 [2018-10-24 14:02:57,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:02:57,821 INFO L481 AbstractCegarLoop]: Abstraction has 164006 states and 176030 transitions. [2018-10-24 14:02:57,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:02:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 164006 states and 176030 transitions. [2018-10-24 14:02:57,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2018-10-24 14:02:57,844 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:02:57,845 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:02:57,845 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:02:57,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:02:57,846 INFO L82 PathProgramCache]: Analyzing trace with hash -915367121, now seen corresponding path program 1 times [2018-10-24 14:02:57,846 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:02:57,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:02:57,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:57,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:02:57,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:02:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:02:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2018-10-24 14:02:58,964 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:02:58,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:02:58,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:02:58,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:02:58,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:02:58,965 INFO L87 Difference]: Start difference. First operand 164006 states and 176030 transitions. Second operand 3 states. [2018-10-24 14:03:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:03:05,490 INFO L93 Difference]: Finished difference Result 363353 states and 390802 transitions. [2018-10-24 14:03:05,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:03:05,491 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 606 [2018-10-24 14:03:05,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:03:05,716 INFO L225 Difference]: With dead ends: 363353 [2018-10-24 14:03:05,716 INFO L226 Difference]: Without dead ends: 200101 [2018-10-24 14:03:05,805 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 14:03:05,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200101 states. [2018-10-24 14:03:08,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200101 to 198597. [2018-10-24 14:03:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198597 states. [2018-10-24 14:03:08,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198597 states to 198597 states and 212197 transitions. [2018-10-24 14:03:08,259 INFO L78 Accepts]: Start accepts. Automaton has 198597 states and 212197 transitions. Word has length 606 [2018-10-24 14:03:08,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:03:08,261 INFO L481 AbstractCegarLoop]: Abstraction has 198597 states and 212197 transitions. [2018-10-24 14:03:08,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:03:08,261 INFO L276 IsEmpty]: Start isEmpty. Operand 198597 states and 212197 transitions. [2018-10-24 14:03:08,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2018-10-24 14:03:08,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:03:08,331 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:03:08,332 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:03:08,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:03:08,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1239426530, now seen corresponding path program 1 times [2018-10-24 14:03:08,332 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:03:08,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:03:08,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:03:08,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:03:08,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:03:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:03:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2018-10-24 14:03:09,225 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:03:09,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:03:09,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:03:09,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:03:09,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:03:09,227 INFO L87 Difference]: Start difference. First operand 198597 states and 212197 transitions. Second operand 3 states. [2018-10-24 14:03:14,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:03:14,922 INFO L93 Difference]: Finished difference Result 389663 states and 416491 transitions. [2018-10-24 14:03:14,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:03:14,922 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 845 [2018-10-24 14:03:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:03:15,128 INFO L225 Difference]: With dead ends: 389663 [2018-10-24 14:03:15,128 INFO L226 Difference]: Without dead ends: 191820 [2018-10-24 14:03:15,222 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 14:03:15,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191820 states. [2018-10-24 14:03:18,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191820 to 189564. [2018-10-24 14:03:18,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189564 states. [2018-10-24 14:03:18,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189564 states to 189564 states and 199320 transitions. [2018-10-24 14:03:18,218 INFO L78 Accepts]: Start accepts. Automaton has 189564 states and 199320 transitions. Word has length 845 [2018-10-24 14:03:18,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:03:18,218 INFO L481 AbstractCegarLoop]: Abstraction has 189564 states and 199320 transitions. [2018-10-24 14:03:18,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:03:18,219 INFO L276 IsEmpty]: Start isEmpty. Operand 189564 states and 199320 transitions. [2018-10-24 14:03:18,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 993 [2018-10-24 14:03:18,308 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:03:18,309 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:03:18,309 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:03:18,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:03:18,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1484498579, now seen corresponding path program 1 times [2018-10-24 14:03:18,310 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:03:18,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:03:18,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:03:18,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:03:18,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:03:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:03:19,216 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-24 14:03:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 591 proven. 196 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-24 14:03:20,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:03:20,995 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 14:03:21,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:03:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:03:21,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:03:22,662 WARN L179 SmtUtils]: Spent 854.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-10-24 14:03:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 591 proven. 196 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-24 14:03:24,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:03:24,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2018-10-24 14:03:24,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 14:03:24,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 14:03:24,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-10-24 14:03:24,274 INFO L87 Difference]: Start difference. First operand 189564 states and 199320 transitions. Second operand 11 states. [2018-10-24 14:04:03,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:04:03,235 INFO L93 Difference]: Finished difference Result 459611 states and 483099 transitions. [2018-10-24 14:04:03,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 14:04:03,235 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 992 [2018-10-24 14:04:03,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:04:03,553 INFO L225 Difference]: With dead ends: 459611 [2018-10-24 14:04:03,553 INFO L226 Difference]: Without dead ends: 270801 [2018-10-24 14:04:03,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1020 GetRequests, 1000 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2018-10-24 14:04:03,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270801 states. [2018-10-24 14:04:05,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270801 to 221157. [2018-10-24 14:04:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221157 states. [2018-10-24 14:04:06,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221157 states to 221157 states and 231090 transitions. [2018-10-24 14:04:06,167 INFO L78 Accepts]: Start accepts. Automaton has 221157 states and 231090 transitions. Word has length 992 [2018-10-24 14:04:06,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:04:06,168 INFO L481 AbstractCegarLoop]: Abstraction has 221157 states and 231090 transitions. [2018-10-24 14:04:06,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 14:04:06,168 INFO L276 IsEmpty]: Start isEmpty. Operand 221157 states and 231090 transitions. [2018-10-24 14:04:06,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 997 [2018-10-24 14:04:06,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:04:06,220 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 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] [2018-10-24 14:04:06,220 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:04:06,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:04:06,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1707178874, now seen corresponding path program 1 times [2018-10-24 14:04:06,221 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:04:06,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:04:06,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:04:06,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:04:06,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:04:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:04:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1223 backedges. 1078 proven. 6 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2018-10-24 14:04:07,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:04:07,919 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:04:07,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:04:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:04:08,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:04:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1223 backedges. 1006 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-10-24 14:04:12,806 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:04:12,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2018-10-24 14:04:12,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 14:04:12,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 14:04:12,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-10-24 14:04:12,808 INFO L87 Difference]: Start difference. First operand 221157 states and 231090 transitions. Second operand 8 states. Received shutdown request... [2018-10-24 14:04:26,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 14:04:26,951 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 14:04:26,957 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 14:04:26,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:04:26 BoogieIcfgContainer [2018-10-24 14:04:26,957 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 14:04:26,958 INFO L168 Benchmark]: Toolchain (without parser) took 228684.46 ms. Allocated memory was 1.5 GB in the beginning and 4.6 GB in the end (delta: 3.1 GB). Free memory was 1.4 GB in the beginning and 3.7 GB in the end (delta: -2.3 GB). Peak memory consumption was 787.2 MB. Max. memory is 7.1 GB. [2018-10-24 14:04:26,959 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 14:04:26,960 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2173.50 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. [2018-10-24 14:04:26,961 INFO L168 Benchmark]: Boogie Procedure Inliner took 638.33 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -990.2 MB). Peak memory consumption was 58.3 MB. Max. memory is 7.1 GB. [2018-10-24 14:04:26,962 INFO L168 Benchmark]: Boogie Preprocessor took 293.07 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: 36.3 MB). Peak memory consumption was 36.3 MB. Max. memory is 7.1 GB. [2018-10-24 14:04:26,962 INFO L168 Benchmark]: RCFGBuilder took 9124.64 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 234.4 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -181.9 MB). Peak memory consumption was 634.3 MB. Max. memory is 7.1 GB. [2018-10-24 14:04:26,963 INFO L168 Benchmark]: TraceAbstraction took 216449.51 ms. Allocated memory was 2.6 GB in the beginning and 4.6 GB in the end (delta: 2.1 GB). Free memory was 2.3 GB in the beginning and 3.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 693.5 MB. Max. memory is 7.1 GB. [2018-10-24 14:04:26,969 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 2173.50 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 638.33 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -990.2 MB). Peak memory consumption was 58.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 293.07 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: 36.3 MB). Peak memory consumption was 36.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9124.64 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 234.4 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -181.9 MB). Peak memory consumption was 634.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 216449.51 ms. Allocated memory was 2.6 GB in the beginning and 4.6 GB in the end (delta: 2.1 GB). Free memory was 2.3 GB in the beginning and 3.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 693.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 81). Cancelled while BasicCegarLoop was constructing difference of abstraction (221157states) and FLOYD_HOARE automaton (currently 8 states, 8 states before enhancement),while ReachableStatesComputation was computing reachable states (308923 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 819 locations, 1 error locations. TIMEOUT Result, 216.3s OverallTime, 13 OverallIterations, 6 TraceHistogramMax, 177.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 7824 SDtfs, 51531 SDslu, 1547 SDs, 0 SdLazy, 90910 SolverSat, 20786 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 140.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3559 GetRequests, 3479 SyntacticMatches, 14 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 6.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=221157occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 14.8s AutomataMinimizationTime, 12 MinimizatonAttempts, 79008 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 15.4s InterpolantComputationTime, 9512 NumberOfCodeBlocks, 9512 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 9493 ConstructedInterpolants, 24 QuantifiedInterpolants, 16912769 SizeOfPredicates, 6 NumberOfNonLiveVariables, 4282 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 19 InterpolantComputations, 11 PerfectInterpolantSequences, 9748/10346 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown