java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/const_false-unreach-call1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 22:40:44,297 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 22:40:44,300 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 22:40:44,311 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 22:40:44,312 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 22:40:44,313 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 22:40:44,314 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 22:40:44,316 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 22:40:44,318 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 22:40:44,319 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 22:40:44,319 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 22:40:44,320 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 22:40:44,321 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 22:40:44,322 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 22:40:44,323 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 22:40:44,324 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 22:40:44,324 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 22:40:44,326 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 22:40:44,328 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 22:40:44,330 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 22:40:44,331 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 22:40:44,332 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 22:40:44,335 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-06 22:40:44,335 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-06 22:40:44,335 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-06 22:40:44,336 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-06 22:40:44,337 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-06 22:40:44,338 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-06 22:40:44,339 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-06 22:40:44,340 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-06 22:40:44,341 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-06 22:40:44,341 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-06 22:40:44,344 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-11-06 22:40:44,359 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 22:40:44,359 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 22:40:44,360 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 22:40:44,360 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 22:40:44,361 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 22:40:44,361 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 22:40:44,362 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 22:40:44,362 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 22:40:44,362 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 22:40:44,362 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 22:40:44,362 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 22:40:44,363 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 22:40:44,363 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 22:40:44,363 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 22:40:44,363 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 22:40:44,363 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 22:40:44,364 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 22:40:44,364 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 22:40:44,364 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 22:40:44,364 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:40:44,364 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 22:40:44,365 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 22:40:44,365 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 22:40:44,365 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 22:40:44,365 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 22:40:44,365 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 22:40:44,365 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 22:40:44,366 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 22:40:44,409 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 22:40:44,421 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 22:40:44,425 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 22:40:44,426 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 22:40:44,427 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 22:40:44,428 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_false-unreach-call1.i [2018-11-06 22:40:44,489 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22ab3f07a/cfcab8e74818466a85fb9aa4f5662723/FLAGfd50215ec [2018-11-06 22:40:44,916 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 22:40:44,917 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_false-unreach-call1.i [2018-11-06 22:40:44,923 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22ab3f07a/cfcab8e74818466a85fb9aa4f5662723/FLAGfd50215ec [2018-11-06 22:40:44,937 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22ab3f07a/cfcab8e74818466a85fb9aa4f5662723 [2018-11-06 22:40:44,947 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 22:40:44,948 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 22:40:44,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 22:40:44,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 22:40:44,954 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 22:40:44,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:40:44" (1/1) ... [2018-11-06 22:40:44,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@278b86a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:44, skipping insertion in model container [2018-11-06 22:40:44,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:40:44" (1/1) ... [2018-11-06 22:40:44,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 22:40:44,989 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 22:40:45,201 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:40:45,205 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 22:40:45,221 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:40:45,237 INFO L193 MainTranslator]: Completed translation [2018-11-06 22:40:45,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:45 WrapperNode [2018-11-06 22:40:45,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 22:40:45,239 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 22:40:45,239 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 22:40:45,239 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 22:40:45,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:45" (1/1) ... [2018-11-06 22:40:45,255 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:45" (1/1) ... [2018-11-06 22:40:45,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 22:40:45,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 22:40:45,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 22:40:45,275 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 22:40:45,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:45" (1/1) ... [2018-11-06 22:40:45,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:45" (1/1) ... [2018-11-06 22:40:45,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:45" (1/1) ... [2018-11-06 22:40:45,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:45" (1/1) ... [2018-11-06 22:40:45,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:45" (1/1) ... [2018-11-06 22:40:45,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:45" (1/1) ... [2018-11-06 22:40:45,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:45" (1/1) ... [2018-11-06 22:40:45,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 22:40:45,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 22:40:45,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 22:40:45,297 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 22:40:45,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:40:45,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 22:40:45,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 22:40:45,637 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 22:40:45,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:40:45 BoogieIcfgContainer [2018-11-06 22:40:45,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 22:40:45,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 22:40:45,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 22:40:45,642 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 22:40:45,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:40:44" (1/3) ... [2018-11-06 22:40:45,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cdf90fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:40:45, skipping insertion in model container [2018-11-06 22:40:45,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:45" (2/3) ... [2018-11-06 22:40:45,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cdf90fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:40:45, skipping insertion in model container [2018-11-06 22:40:45,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:40:45" (3/3) ... [2018-11-06 22:40:45,646 INFO L112 eAbstractionObserver]: Analyzing ICFG const_false-unreach-call1.i [2018-11-06 22:40:45,656 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 22:40:45,662 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 22:40:45,679 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 22:40:45,711 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 22:40:45,711 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 22:40:45,712 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 22:40:45,712 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 22:40:45,712 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 22:40:45,712 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 22:40:45,712 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 22:40:45,712 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 22:40:45,712 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 22:40:45,725 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-11-06 22:40:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-11-06 22:40:45,731 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:45,732 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-11-06 22:40:45,735 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:45,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:45,740 INFO L82 PathProgramCache]: Analyzing trace with hash 889783783, now seen corresponding path program 1 times [2018-11-06 22:40:45,742 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:45,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:45,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:45,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:45,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:45,861 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:40:45,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 22:40:45,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-06 22:40:45,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-06 22:40:45,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:40:45,883 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2018-11-06 22:40:45,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:45,899 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-11-06 22:40:45,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-06 22:40:45,901 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-11-06 22:40:45,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:45,910 INFO L225 Difference]: With dead ends: 20 [2018-11-06 22:40:45,911 INFO L226 Difference]: Without dead ends: 8 [2018-11-06 22:40:45,914 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:40:45,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-11-06 22:40:45,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-11-06 22:40:45,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-11-06 22:40:45,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-11-06 22:40:45,945 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-11-06 22:40:45,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:45,946 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-11-06 22:40:45,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-06 22:40:45,946 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-11-06 22:40:45,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-11-06 22:40:45,947 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:45,947 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:45,947 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:45,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:45,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1805923659, now seen corresponding path program 1 times [2018-11-06 22:40:45,948 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:45,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:45,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:45,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:45,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:46,054 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:40:46,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 22:40:46,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 22:40:46,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 22:40:46,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:40:46,059 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 3 states. [2018-11-06 22:40:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:46,113 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-11-06 22:40:46,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 22:40:46,114 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-11-06 22:40:46,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:46,114 INFO L225 Difference]: With dead ends: 14 [2018-11-06 22:40:46,114 INFO L226 Difference]: Without dead ends: 10 [2018-11-06 22:40:46,116 INFO L604 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 [2018-11-06 22:40:46,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-11-06 22:40:46,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-11-06 22:40:46,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-11-06 22:40:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-11-06 22:40:46,120 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-11-06 22:40:46,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:46,120 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-11-06 22:40:46,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 22:40:46,121 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-11-06 22:40:46,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-06 22:40:46,121 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:46,122 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:46,122 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:46,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:46,122 INFO L82 PathProgramCache]: Analyzing trace with hash 373599493, now seen corresponding path program 1 times [2018-11-06 22:40:46,122 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:46,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:46,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:46,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:46,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:46,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:46,235 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:40:46,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:46,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:46,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:46,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-11-06 22:40:46,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 22:40:46,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 22:40:46,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:40:46,379 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 4 states. [2018-11-06 22:40:46,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:46,424 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-11-06 22:40:46,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 22:40:46,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-11-06 22:40:46,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:46,426 INFO L225 Difference]: With dead ends: 16 [2018-11-06 22:40:46,426 INFO L226 Difference]: Without dead ends: 12 [2018-11-06 22:40:46,426 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:40:46,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-06 22:40:46,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-06 22:40:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-06 22:40:46,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-06 22:40:46,430 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-11-06 22:40:46,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:46,430 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-06 22:40:46,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 22:40:46,431 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-06 22:40:46,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-06 22:40:46,431 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:46,432 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:46,432 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:46,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:46,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1700389313, now seen corresponding path program 2 times [2018-11-06 22:40:46,433 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:46,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:46,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:46,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:46,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:46,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:46,600 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:40:46,612 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:40:46,627 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:40:46,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:46,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:46,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:46,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-06 22:40:46,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 22:40:46,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 22:40:46,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:40:46,670 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2018-11-06 22:40:46,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:46,730 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-11-06 22:40:46,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 22:40:46,731 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-06 22:40:46,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:46,733 INFO L225 Difference]: With dead ends: 18 [2018-11-06 22:40:46,733 INFO L226 Difference]: Without dead ends: 14 [2018-11-06 22:40:46,734 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:40:46,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-06 22:40:46,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-06 22:40:46,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-06 22:40:46,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-06 22:40:46,738 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-11-06 22:40:46,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:46,739 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-06 22:40:46,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 22:40:46,740 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-06 22:40:46,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-06 22:40:46,740 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:46,740 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:46,741 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:46,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:46,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1938806535, now seen corresponding path program 3 times [2018-11-06 22:40:46,742 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:46,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:46,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:46,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:46,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:47,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:47,137 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:40:47,150 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:40:47,170 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-06 22:40:47,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:47,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:47,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:47,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-06 22:40:47,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 22:40:47,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 22:40:47,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:40:47,220 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-11-06 22:40:47,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:47,273 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-11-06 22:40:47,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 22:40:47,274 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-11-06 22:40:47,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:47,275 INFO L225 Difference]: With dead ends: 20 [2018-11-06 22:40:47,275 INFO L226 Difference]: Without dead ends: 16 [2018-11-06 22:40:47,276 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:40:47,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-06 22:40:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-11-06 22:40:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-06 22:40:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-11-06 22:40:47,279 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-11-06 22:40:47,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:47,280 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-11-06 22:40:47,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 22:40:47,280 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-11-06 22:40:47,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-06 22:40:47,281 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:47,281 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:47,281 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:47,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:47,282 INFO L82 PathProgramCache]: Analyzing trace with hash 870477107, now seen corresponding path program 4 times [2018-11-06 22:40:47,282 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:47,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:47,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:47,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:47,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:47,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:47,498 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:40:47,507 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:40:47,519 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:40:47,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:47,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:47,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:47,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-06 22:40:47,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 22:40:47,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 22:40:47,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:40:47,573 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2018-11-06 22:40:47,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:47,719 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-11-06 22:40:47,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 22:40:47,720 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-11-06 22:40:47,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:47,722 INFO L225 Difference]: With dead ends: 22 [2018-11-06 22:40:47,722 INFO L226 Difference]: Without dead ends: 18 [2018-11-06 22:40:47,723 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:40:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-06 22:40:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-06 22:40:47,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-06 22:40:47,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-06 22:40:47,727 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-11-06 22:40:47,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:47,727 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-06 22:40:47,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 22:40:47,728 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-06 22:40:47,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-06 22:40:47,728 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:47,728 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:47,729 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:47,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:47,729 INFO L82 PathProgramCache]: Analyzing trace with hash -942372115, now seen corresponding path program 5 times [2018-11-06 22:40:47,729 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:47,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:47,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:47,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:47,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:47,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:47,875 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:40:47,893 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:40:47,918 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-06 22:40:47,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:47,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:47,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:47,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-06 22:40:47,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-06 22:40:47,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-06 22:40:47,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:40:47,959 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 8 states. [2018-11-06 22:40:48,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:48,122 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-11-06 22:40:48,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-06 22:40:48,123 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-11-06 22:40:48,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:48,123 INFO L225 Difference]: With dead ends: 24 [2018-11-06 22:40:48,124 INFO L226 Difference]: Without dead ends: 20 [2018-11-06 22:40:48,124 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:40:48,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-06 22:40:48,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-11-06 22:40:48,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-06 22:40:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-11-06 22:40:48,128 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-11-06 22:40:48,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:48,129 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-11-06 22:40:48,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-06 22:40:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-11-06 22:40:48,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-06 22:40:48,130 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:48,130 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:48,130 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:48,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:48,131 INFO L82 PathProgramCache]: Analyzing trace with hash 666247719, now seen corresponding path program 6 times [2018-11-06 22:40:48,131 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:48,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:48,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:48,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:48,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:48,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:48,591 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:40:48,601 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:40:48,620 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-06 22:40:48,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:48,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:48,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:48,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-06 22:40:48,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 22:40:48,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 22:40:48,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:40:48,699 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2018-11-06 22:40:48,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:48,818 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-11-06 22:40:48,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-06 22:40:48,819 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-11-06 22:40:48,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:48,820 INFO L225 Difference]: With dead ends: 26 [2018-11-06 22:40:48,820 INFO L226 Difference]: Without dead ends: 22 [2018-11-06 22:40:48,821 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:40:48,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-06 22:40:48,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-06 22:40:48,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-06 22:40:48,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-11-06 22:40:48,825 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-11-06 22:40:48,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:48,826 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-11-06 22:40:48,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 22:40:48,826 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-11-06 22:40:48,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-06 22:40:48,826 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:48,827 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:48,827 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:48,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:48,827 INFO L82 PathProgramCache]: Analyzing trace with hash 361681633, now seen corresponding path program 7 times [2018-11-06 22:40:48,827 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:48,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:48,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:48,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:48,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:49,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:49,117 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:49,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:49,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:49,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:49,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-06 22:40:49,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 22:40:49,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 22:40:49,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:40:49,185 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 10 states. [2018-11-06 22:40:49,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:49,349 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-11-06 22:40:49,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:40:49,350 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2018-11-06 22:40:49,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:49,350 INFO L225 Difference]: With dead ends: 28 [2018-11-06 22:40:49,351 INFO L226 Difference]: Without dead ends: 24 [2018-11-06 22:40:49,351 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:40:49,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-06 22:40:49,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-06 22:40:49,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-06 22:40:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-11-06 22:40:49,357 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-11-06 22:40:49,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:49,357 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-11-06 22:40:49,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 22:40:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-11-06 22:40:49,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-06 22:40:49,358 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:49,359 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:49,359 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:49,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:49,359 INFO L82 PathProgramCache]: Analyzing trace with hash -268550885, now seen corresponding path program 8 times [2018-11-06 22:40:49,360 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:49,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:49,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:49,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:49,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:49,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:49,596 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:49,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:40:49,635 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:40:49,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:49,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:49,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:49,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-06 22:40:49,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-06 22:40:49,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-06 22:40:49,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:40:49,673 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 11 states. [2018-11-06 22:40:49,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:49,793 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-11-06 22:40:49,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-06 22:40:49,794 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2018-11-06 22:40:49,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:49,795 INFO L225 Difference]: With dead ends: 30 [2018-11-06 22:40:49,795 INFO L226 Difference]: Without dead ends: 26 [2018-11-06 22:40:49,796 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:40:49,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-06 22:40:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-11-06 22:40:49,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-06 22:40:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-11-06 22:40:49,800 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-11-06 22:40:49,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:49,801 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-11-06 22:40:49,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-06 22:40:49,801 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-11-06 22:40:49,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-06 22:40:49,802 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:49,802 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:49,802 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:49,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:49,803 INFO L82 PathProgramCache]: Analyzing trace with hash -331611947, now seen corresponding path program 9 times [2018-11-06 22:40:49,803 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:49,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:49,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:49,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:49,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:50,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:50,002 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:50,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:40:50,086 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-06 22:40:50,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:50,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:50,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:50,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-06 22:40:50,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-06 22:40:50,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-06 22:40:50,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:40:50,136 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 12 states. [2018-11-06 22:40:50,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:50,273 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-11-06 22:40:50,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-06 22:40:50,274 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2018-11-06 22:40:50,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:50,274 INFO L225 Difference]: With dead ends: 32 [2018-11-06 22:40:50,275 INFO L226 Difference]: Without dead ends: 28 [2018-11-06 22:40:50,275 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:40:50,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-06 22:40:50,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-06 22:40:50,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-06 22:40:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-11-06 22:40:50,280 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-11-06 22:40:50,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:50,281 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-11-06 22:40:50,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-06 22:40:50,281 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-11-06 22:40:50,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-06 22:40:50,281 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:50,282 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:50,282 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:50,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:50,282 INFO L82 PathProgramCache]: Analyzing trace with hash -803750385, now seen corresponding path program 10 times [2018-11-06 22:40:50,282 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:50,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:50,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:50,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:50,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:50,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:50,603 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:50,620 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:40:50,645 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:40:50,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:50,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:50,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:50,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-06 22:40:50,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-06 22:40:50,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-06 22:40:50,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:40:50,699 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 13 states. [2018-11-06 22:40:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:50,919 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-11-06 22:40:50,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-06 22:40:50,920 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2018-11-06 22:40:50,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:50,921 INFO L225 Difference]: With dead ends: 34 [2018-11-06 22:40:50,921 INFO L226 Difference]: Without dead ends: 30 [2018-11-06 22:40:50,921 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:40:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-06 22:40:50,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-06 22:40:50,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-06 22:40:50,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-11-06 22:40:50,926 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-11-06 22:40:50,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:50,927 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-11-06 22:40:50,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-06 22:40:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-11-06 22:40:50,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-06 22:40:50,928 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:50,928 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:50,928 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:50,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:50,929 INFO L82 PathProgramCache]: Analyzing trace with hash 737744073, now seen corresponding path program 11 times [2018-11-06 22:40:50,929 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:50,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:50,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:50,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:50,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:51,338 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:51,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:51,339 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:51,349 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:40:51,629 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-06 22:40:51,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:51,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:51,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:51,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-06 22:40:51,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-06 22:40:51,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-06 22:40:51,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:40:51,691 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 14 states. [2018-11-06 22:40:51,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:51,849 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-11-06 22:40:51,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-06 22:40:51,850 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2018-11-06 22:40:51,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:51,851 INFO L225 Difference]: With dead ends: 36 [2018-11-06 22:40:51,851 INFO L226 Difference]: Without dead ends: 32 [2018-11-06 22:40:51,851 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:40:51,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-06 22:40:51,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-11-06 22:40:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-06 22:40:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-11-06 22:40:51,856 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-11-06 22:40:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:51,856 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-11-06 22:40:51,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-06 22:40:51,857 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-11-06 22:40:51,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-06 22:40:51,858 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:51,858 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:51,858 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:51,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:51,858 INFO L82 PathProgramCache]: Analyzing trace with hash 350201091, now seen corresponding path program 12 times [2018-11-06 22:40:51,859 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:51,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:51,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:51,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:51,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:52,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:52,294 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:52,303 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:40:52,351 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-06 22:40:52,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:52,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:52,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:52,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-06 22:40:52,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-06 22:40:52,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-06 22:40:52,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:40:52,388 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 15 states. [2018-11-06 22:40:52,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:52,570 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-11-06 22:40:52,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-06 22:40:52,571 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2018-11-06 22:40:52,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:52,572 INFO L225 Difference]: With dead ends: 38 [2018-11-06 22:40:52,573 INFO L226 Difference]: Without dead ends: 34 [2018-11-06 22:40:52,574 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:40:52,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-06 22:40:52,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-11-06 22:40:52,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-06 22:40:52,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-11-06 22:40:52,579 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-11-06 22:40:52,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:52,579 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-11-06 22:40:52,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-06 22:40:52,579 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-11-06 22:40:52,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-06 22:40:52,580 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:52,580 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:52,581 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:52,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:52,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1583550141, now seen corresponding path program 13 times [2018-11-06 22:40:52,581 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:52,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:52,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:52,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:52,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:53,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:53,122 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:53,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:53,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:53,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:53,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-06 22:40:53,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-06 22:40:53,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-06 22:40:53,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:40:53,197 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 16 states. [2018-11-06 22:40:53,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:53,410 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-11-06 22:40:53,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 22:40:53,411 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-11-06 22:40:53,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:53,412 INFO L225 Difference]: With dead ends: 40 [2018-11-06 22:40:53,412 INFO L226 Difference]: Without dead ends: 36 [2018-11-06 22:40:53,412 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:40:53,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-06 22:40:53,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-06 22:40:53,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-06 22:40:53,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-11-06 22:40:53,422 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-11-06 22:40:53,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:53,422 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-11-06 22:40:53,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-06 22:40:53,422 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-11-06 22:40:53,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-06 22:40:53,423 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:53,423 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:53,424 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:53,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:53,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1421013495, now seen corresponding path program 14 times [2018-11-06 22:40:53,424 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:53,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:53,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:53,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:53,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:53,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:53,764 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:53,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:40:53,812 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:40:53,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:53,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:53,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:53,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-06 22:40:53,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-06 22:40:53,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-06 22:40:53,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:40:53,868 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 17 states. [2018-11-06 22:40:54,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:54,094 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-11-06 22:40:54,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-06 22:40:54,094 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2018-11-06 22:40:54,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:54,095 INFO L225 Difference]: With dead ends: 42 [2018-11-06 22:40:54,095 INFO L226 Difference]: Without dead ends: 38 [2018-11-06 22:40:54,096 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:40:54,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-06 22:40:54,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-11-06 22:40:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-06 22:40:54,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-11-06 22:40:54,100 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-11-06 22:40:54,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:54,101 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-11-06 22:40:54,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-06 22:40:54,101 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-11-06 22:40:54,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-06 22:40:54,102 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:54,102 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:54,102 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:54,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:54,103 INFO L82 PathProgramCache]: Analyzing trace with hash -157880655, now seen corresponding path program 15 times [2018-11-06 22:40:54,103 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:54,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:54,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:54,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:54,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:54,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:54,456 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:54,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:40:59,446 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-06 22:40:59,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:59,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:59,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:59,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-06 22:40:59,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-06 22:40:59,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-06 22:40:59,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:40:59,697 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 18 states. [2018-11-06 22:40:59,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:59,898 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-11-06 22:40:59,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-06 22:40:59,898 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2018-11-06 22:40:59,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:59,899 INFO L225 Difference]: With dead ends: 44 [2018-11-06 22:40:59,899 INFO L226 Difference]: Without dead ends: 40 [2018-11-06 22:40:59,900 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:40:59,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-06 22:40:59,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-11-06 22:40:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-06 22:40:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-11-06 22:40:59,905 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-11-06 22:40:59,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:59,906 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-11-06 22:40:59,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-06 22:40:59,906 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-11-06 22:40:59,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-06 22:40:59,907 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:59,907 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:59,907 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:59,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:59,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1351703317, now seen corresponding path program 16 times [2018-11-06 22:40:59,908 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:59,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:59,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:59,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:59,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:00,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:00,344 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:00,353 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:41:00,379 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:41:00,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:00,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:00,420 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:00,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:00,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-06 22:41:00,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-06 22:41:00,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-06 22:41:00,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:41:00,443 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 19 states. [2018-11-06 22:41:00,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:00,896 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-11-06 22:41:00,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-06 22:41:00,897 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2018-11-06 22:41:00,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:00,898 INFO L225 Difference]: With dead ends: 46 [2018-11-06 22:41:00,898 INFO L226 Difference]: Without dead ends: 42 [2018-11-06 22:41:00,899 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:41:00,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-06 22:41:00,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-06 22:41:00,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-06 22:41:00,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-11-06 22:41:00,904 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-11-06 22:41:00,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:00,904 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-11-06 22:41:00,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-06 22:41:00,904 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-11-06 22:41:00,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-06 22:41:00,905 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:00,905 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:00,905 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:00,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:00,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1859013467, now seen corresponding path program 17 times [2018-11-06 22:41:00,906 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:00,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:00,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:00,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:00,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:01,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:01,219 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:01,228 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:41:29,412 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-06 22:41:29,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:29,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:29,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:29,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-06 22:41:29,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-06 22:41:29,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-06 22:41:29,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:41:29,494 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 20 states. [2018-11-06 22:41:30,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:30,209 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-11-06 22:41:30,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-06 22:41:30,210 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2018-11-06 22:41:30,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:30,210 INFO L225 Difference]: With dead ends: 48 [2018-11-06 22:41:30,211 INFO L226 Difference]: Without dead ends: 44 [2018-11-06 22:41:30,211 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:41:30,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-11-06 22:41:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-11-06 22:41:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-06 22:41:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-11-06 22:41:30,216 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-11-06 22:41:30,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:30,216 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-11-06 22:41:30,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-06 22:41:30,217 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-11-06 22:41:30,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-06 22:41:30,217 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:30,217 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:30,218 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:30,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:30,218 INFO L82 PathProgramCache]: Analyzing trace with hash 242204127, now seen corresponding path program 18 times [2018-11-06 22:41:30,218 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:30,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:30,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:30,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:30,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:30,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:30,914 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:30,930 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:41:31,092 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-06 22:41:31,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:31,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:31,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:31,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-06 22:41:31,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-06 22:41:31,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-06 22:41:31,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:41:31,162 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 21 states. [2018-11-06 22:41:31,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:31,497 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-11-06 22:41:31,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-06 22:41:31,498 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2018-11-06 22:41:31,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:31,499 INFO L225 Difference]: With dead ends: 50 [2018-11-06 22:41:31,499 INFO L226 Difference]: Without dead ends: 46 [2018-11-06 22:41:31,500 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:41:31,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-06 22:41:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-11-06 22:41:31,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-06 22:41:31,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-11-06 22:41:31,507 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-11-06 22:41:31,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:31,507 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-11-06 22:41:31,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-06 22:41:31,508 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-11-06 22:41:31,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-06 22:41:31,510 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:31,510 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:31,511 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:31,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:31,511 INFO L82 PathProgramCache]: Analyzing trace with hash 877682841, now seen corresponding path program 19 times [2018-11-06 22:41:31,511 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:31,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:31,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:31,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:31,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:31,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:31,895 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:31,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:41:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:31,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:31,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:31,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-06 22:41:31,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 22:41:31,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 22:41:31,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:41:31,993 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 22 states. [2018-11-06 22:41:32,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:32,446 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-11-06 22:41:32,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 22:41:32,450 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2018-11-06 22:41:32,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:32,451 INFO L225 Difference]: With dead ends: 52 [2018-11-06 22:41:32,451 INFO L226 Difference]: Without dead ends: 48 [2018-11-06 22:41:32,451 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:41:32,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-06 22:41:32,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-06 22:41:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-06 22:41:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-11-06 22:41:32,456 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-11-06 22:41:32,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:32,457 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-11-06 22:41:32,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 22:41:32,457 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-11-06 22:41:32,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-11-06 22:41:32,458 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:32,458 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:32,458 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:32,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:32,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1687370963, now seen corresponding path program 20 times [2018-11-06 22:41:32,459 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:32,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:32,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:32,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:41:32,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:33,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:33,056 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:33,070 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:41:33,091 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:41:33,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:33,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:33,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:33,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-06 22:41:33,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-06 22:41:33,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-06 22:41:33,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:41:33,162 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 23 states. [2018-11-06 22:41:33,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:33,534 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-11-06 22:41:33,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-06 22:41:33,537 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 47 [2018-11-06 22:41:33,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:33,537 INFO L225 Difference]: With dead ends: 54 [2018-11-06 22:41:33,537 INFO L226 Difference]: Without dead ends: 50 [2018-11-06 22:41:33,538 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:41:33,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-06 22:41:33,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-11-06 22:41:33,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-11-06 22:41:33,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-11-06 22:41:33,542 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-11-06 22:41:33,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:33,543 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-11-06 22:41:33,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-06 22:41:33,543 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-11-06 22:41:33,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-06 22:41:33,543 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:33,544 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:33,544 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:33,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:33,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1886391667, now seen corresponding path program 21 times [2018-11-06 22:41:33,544 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:33,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:33,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:33,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:33,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:33,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:33,957 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:33,970 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:41:34,350 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-06 22:41:34,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:34,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:34,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:34,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-06 22:41:34,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-06 22:41:34,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-06 22:41:34,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:41:34,475 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 24 states. [2018-11-06 22:41:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:34,908 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-11-06 22:41:34,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-06 22:41:34,908 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2018-11-06 22:41:34,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:34,909 INFO L225 Difference]: With dead ends: 56 [2018-11-06 22:41:34,909 INFO L226 Difference]: Without dead ends: 52 [2018-11-06 22:41:34,910 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:41:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-11-06 22:41:34,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-11-06 22:41:34,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-06 22:41:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-11-06 22:41:34,916 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-11-06 22:41:34,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:34,917 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-11-06 22:41:34,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-06 22:41:34,917 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-11-06 22:41:34,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-06 22:41:34,918 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:34,918 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:34,918 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:34,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:34,918 INFO L82 PathProgramCache]: Analyzing trace with hash -298442297, now seen corresponding path program 22 times [2018-11-06 22:41:34,919 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:34,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:34,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:34,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:34,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:36,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:36,007 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:36,014 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:41:36,033 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:41:36,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:36,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:36,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:36,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-06 22:41:36,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-06 22:41:36,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-06 22:41:36,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:41:36,090 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 25 states. [2018-11-06 22:41:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:36,458 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-11-06 22:41:36,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-06 22:41:36,459 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2018-11-06 22:41:36,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:36,460 INFO L225 Difference]: With dead ends: 58 [2018-11-06 22:41:36,460 INFO L226 Difference]: Without dead ends: 54 [2018-11-06 22:41:36,460 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:41:36,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-06 22:41:36,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-06 22:41:36,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-06 22:41:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-11-06 22:41:36,464 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-11-06 22:41:36,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:36,464 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-11-06 22:41:36,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-06 22:41:36,464 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-11-06 22:41:36,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-06 22:41:36,465 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:36,465 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:36,465 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:36,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:36,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1007512193, now seen corresponding path program 23 times [2018-11-06 22:41:36,465 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:36,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:36,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:36,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:36,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:36,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:36,968 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:36,976 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:42:59,031 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-11-06 22:42:59,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:42:59,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:42:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:42:59,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:42:59,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-11-06 22:42:59,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-06 22:42:59,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-06 22:42:59,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-11-06 22:42:59,728 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 26 states. [2018-11-06 22:43:00,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:00,380 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-11-06 22:43:00,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-06 22:43:00,381 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 53 [2018-11-06 22:43:00,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:00,381 INFO L225 Difference]: With dead ends: 60 [2018-11-06 22:43:00,382 INFO L226 Difference]: Without dead ends: 56 [2018-11-06 22:43:00,383 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-11-06 22:43:00,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-11-06 22:43:00,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-11-06 22:43:00,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-06 22:43:00,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-11-06 22:43:00,388 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-11-06 22:43:00,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:00,388 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-11-06 22:43:00,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-06 22:43:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-11-06 22:43:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-06 22:43:00,389 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:00,389 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:00,389 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:00,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:00,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1899326651, now seen corresponding path program 24 times [2018-11-06 22:43:00,389 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:00,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:00,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:00,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:00,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:00,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:00,817 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:00,826 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:43:14,770 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-11-06 22:43:14,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:15,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:15,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:15,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-06 22:43:15,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-06 22:43:15,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-06 22:43:15,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-11-06 22:43:15,164 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 27 states. [2018-11-06 22:43:15,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:15,756 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-11-06 22:43:15,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-06 22:43:15,757 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2018-11-06 22:43:15,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:15,757 INFO L225 Difference]: With dead ends: 62 [2018-11-06 22:43:15,758 INFO L226 Difference]: Without dead ends: 58 [2018-11-06 22:43:15,758 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-11-06 22:43:15,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-11-06 22:43:15,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-11-06 22:43:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-06 22:43:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-11-06 22:43:15,763 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-11-06 22:43:15,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:15,764 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-11-06 22:43:15,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-06 22:43:15,764 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-11-06 22:43:15,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-06 22:43:15,764 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:15,764 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:15,764 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:15,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:15,765 INFO L82 PathProgramCache]: Analyzing trace with hash -60438411, now seen corresponding path program 25 times [2018-11-06 22:43:15,765 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:15,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:15,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:15,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:15,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:16,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:16,301 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:16,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:16,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:16,366 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:16,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:16,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-11-06 22:43:16,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-06 22:43:16,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-06 22:43:16,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:43:16,387 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 28 states. [2018-11-06 22:43:16,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:16,892 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-11-06 22:43:16,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-06 22:43:16,893 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 57 [2018-11-06 22:43:16,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:16,893 INFO L225 Difference]: With dead ends: 64 [2018-11-06 22:43:16,894 INFO L226 Difference]: Without dead ends: 60 [2018-11-06 22:43:16,894 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:43:16,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-06 22:43:16,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-06 22:43:16,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-06 22:43:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-11-06 22:43:16,899 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-11-06 22:43:16,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:16,899 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-11-06 22:43:16,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-06 22:43:16,899 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-11-06 22:43:16,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-06 22:43:16,900 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:16,900 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:16,900 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:16,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:16,901 INFO L82 PathProgramCache]: Analyzing trace with hash 2095979951, now seen corresponding path program 26 times [2018-11-06 22:43:16,901 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:16,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:16,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:16,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:16,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:17,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:17,676 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:17,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:43:17,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:43:17,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:17,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:17,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:17,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-06 22:43:17,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-06 22:43:17,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-06 22:43:17,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-11-06 22:43:17,786 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 29 states. [2018-11-06 22:43:18,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:18,415 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-11-06 22:43:18,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-06 22:43:18,416 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 59 [2018-11-06 22:43:18,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:18,417 INFO L225 Difference]: With dead ends: 66 [2018-11-06 22:43:18,418 INFO L226 Difference]: Without dead ends: 62 [2018-11-06 22:43:18,418 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-11-06 22:43:18,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-11-06 22:43:18,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-11-06 22:43:18,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-11-06 22:43:18,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-11-06 22:43:18,422 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-11-06 22:43:18,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:18,422 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-11-06 22:43:18,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-06 22:43:18,422 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-11-06 22:43:18,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-06 22:43:18,423 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:18,423 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:18,423 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:18,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:18,424 INFO L82 PathProgramCache]: Analyzing trace with hash -55178135, now seen corresponding path program 27 times [2018-11-06 22:43:18,424 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:18,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:18,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:18,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:18,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:19,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:19,218 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:19,236 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:43:19,676 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-11-06 22:43:19,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:19,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:19,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:19,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-11-06 22:43:19,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-06 22:43:19,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-06 22:43:19,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-11-06 22:43:19,761 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 30 states. [2018-11-06 22:43:20,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:20,469 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-11-06 22:43:20,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-06 22:43:20,470 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 61 [2018-11-06 22:43:20,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:20,471 INFO L225 Difference]: With dead ends: 68 [2018-11-06 22:43:20,471 INFO L226 Difference]: Without dead ends: 64 [2018-11-06 22:43:20,472 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-11-06 22:43:20,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-11-06 22:43:20,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-11-06 22:43:20,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-06 22:43:20,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-11-06 22:43:20,476 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-11-06 22:43:20,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:20,476 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-11-06 22:43:20,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-06 22:43:20,476 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-11-06 22:43:20,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-06 22:43:20,477 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:20,477 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:20,477 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:20,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:20,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1438829405, now seen corresponding path program 28 times [2018-11-06 22:43:20,478 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:20,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:20,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:20,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:20,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:21,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:21,191 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:21,201 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:43:21,228 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:43:21,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:21,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:21,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:21,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-11-06 22:43:21,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-06 22:43:21,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-06 22:43:21,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:43:21,285 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 31 states. [2018-11-06 22:43:21,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:21,845 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-11-06 22:43:21,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-06 22:43:21,846 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 63 [2018-11-06 22:43:21,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:21,847 INFO L225 Difference]: With dead ends: 70 [2018-11-06 22:43:21,847 INFO L226 Difference]: Without dead ends: 66 [2018-11-06 22:43:21,848 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:43:21,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-06 22:43:21,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-06 22:43:21,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-06 22:43:21,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-11-06 22:43:21,851 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-11-06 22:43:21,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:21,851 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-11-06 22:43:21,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-06 22:43:21,851 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-11-06 22:43:21,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-06 22:43:21,851 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:21,852 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:21,852 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:21,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:21,852 INFO L82 PathProgramCache]: Analyzing trace with hash 312161885, now seen corresponding path program 29 times [2018-11-06 22:43:21,852 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:21,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:21,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:21,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:21,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:22,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:22,918 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:22,926 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:45:26,116 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-11-06 22:45:26,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:45:26,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:45:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:45:26,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:45:26,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-11-06 22:45:26,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-06 22:45:26,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-06 22:45:26,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-11-06 22:45:26,328 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 32 states. [2018-11-06 22:45:26,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:45:26,934 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-11-06 22:45:26,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-06 22:45:26,934 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 65 [2018-11-06 22:45:26,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:45:26,935 INFO L225 Difference]: With dead ends: 72 [2018-11-06 22:45:26,935 INFO L226 Difference]: Without dead ends: 68 [2018-11-06 22:45:26,936 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-11-06 22:45:26,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-06 22:45:26,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-11-06 22:45:26,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-11-06 22:45:26,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-11-06 22:45:26,939 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-11-06 22:45:26,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:45:26,940 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-11-06 22:45:26,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-06 22:45:26,940 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-11-06 22:45:26,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-06 22:45:26,940 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:45:26,940 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1] [2018-11-06 22:45:26,941 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:45:26,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:45:26,941 INFO L82 PathProgramCache]: Analyzing trace with hash -612388457, now seen corresponding path program 30 times [2018-11-06 22:45:26,941 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:45:26,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:45:26,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:26,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:45:26,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:45:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-11-06 22:45:27,322 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-06 22:45:27,326 WARN L205 ceAbstractionStarter]: Timeout [2018-11-06 22:45:27,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:45:27 BoogieIcfgContainer [2018-11-06 22:45:27,326 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-06 22:45:27,327 INFO L168 Benchmark]: Toolchain (without parser) took 282379.57 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -540.6 MB). Peak memory consumption was 557.8 MB. Max. memory is 7.1 GB. [2018-11-06 22:45:27,331 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 22:45:27,331 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.50 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-11-06 22:45:27,333 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 22:45:27,333 INFO L168 Benchmark]: Boogie Preprocessor took 21.37 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 22:45:27,334 INFO L168 Benchmark]: RCFGBuilder took 341.40 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 754.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -803.3 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. [2018-11-06 22:45:27,335 INFO L168 Benchmark]: TraceAbstraction took 281687.20 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 343.9 MB). Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 252.2 MB). Peak memory consumption was 596.1 MB. Max. memory is 7.1 GB. [2018-11-06 22:45:27,340 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 288.50 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 36.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.37 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 341.40 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 754.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -803.3 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 281687.20 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 343.9 MB). Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 252.2 MB). Peak memory consumption was 596.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 4]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 4). Cancelled while BasicCegarLoop was analyzing trace of length 68 with TraceHistMax 31,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 20 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 281.6s OverallTime, 32 OverallIterations, 31 TraceHistogramMax, 9.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 657 SDtfs, 0 SDslu, 10851 SDs, 0 SdLazy, 10385 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1571 GetRequests, 1074 SyntacticMatches, 32 SemanticMatches, 465 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=31, 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: 0.1s AutomataMinimizationTime, 31 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 254.3s SatisfiabilityAnalysisTime, 15.4s InterpolantComputationTime, 2159 NumberOfCodeBlocks, 2159 NumberOfCodeBlocksAsserted, 290 NumberOfCheckSat, 2099 ConstructedInterpolants, 0 QuantifiedInterpolants, 589877 SizeOfPredicates, 29 NumberOfNonLiveVariables, 3074 ConjunctsInSsa, 960 ConjunctsInUnsatCore, 60 InterpolantComputations, 2 PerfectInterpolantSequences, 0/17980 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown