java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_false-unreach-call3_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:40:32,568 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:40:32,573 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:40:32,588 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:40:32,588 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:40:32,590 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:40:32,591 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:40:32,593 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:40:32,594 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:40:32,595 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:40:32,596 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:40:32,597 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:40:32,597 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:40:32,598 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:40:32,600 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:40:32,601 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:40:32,601 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:40:32,603 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:40:32,606 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:40:32,607 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:40:32,608 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:40:32,610 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:40:32,613 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:40:32,622 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-22 15:40:32,647 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:40:32,648 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:40:32,649 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:40:32,649 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:40:32,649 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:40:32,650 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:40:32,650 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:40:32,650 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:40:32,650 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:40:32,650 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:40:32,651 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:40:32,651 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:40:32,651 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:40:32,651 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:40:32,651 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:40:32,652 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:40:32,652 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:40:32,652 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:40:32,652 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:40:32,652 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:40:32,653 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:40:32,653 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:40:32,653 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:40:32,653 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:40:32,653 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:40:32,654 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:40:32,654 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:40:32,654 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:40:32,697 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:40:32,713 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:40:32,717 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:40:32,719 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:40:32,720 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:40:32,721 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/array_false-unreach-call3_true-termination.i [2018-10-22 15:40:32,780 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8557da341/cdd309387a3c4ef6b4508934357e239c/FLAG541184b2a [2018-10-22 15:40:33,205 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:40:33,206 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_false-unreach-call3_true-termination.i [2018-10-22 15:40:33,212 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8557da341/cdd309387a3c4ef6b4508934357e239c/FLAG541184b2a [2018-10-22 15:40:33,226 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8557da341/cdd309387a3c4ef6b4508934357e239c [2018-10-22 15:40:33,236 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:40:33,238 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:40:33,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:40:33,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:40:33,243 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:40:33,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:40:33" (1/1) ... [2018-10-22 15:40:33,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@638dce49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:33, skipping insertion in model container [2018-10-22 15:40:33,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:40:33" (1/1) ... [2018-10-22 15:40:33,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:40:33,281 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:40:33,484 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:40:33,489 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:40:33,515 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:40:33,544 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:40:33,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:33 WrapperNode [2018-10-22 15:40:33,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:40:33,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:40:33,547 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:40:33,547 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:40:33,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:33" (1/1) ... [2018-10-22 15:40:33,569 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:33" (1/1) ... [2018-10-22 15:40:33,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:40:33,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:40:33,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:40:33,595 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:40:33,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:33" (1/1) ... [2018-10-22 15:40:33,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:33" (1/1) ... [2018-10-22 15:40:33,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:33" (1/1) ... [2018-10-22 15:40:33,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:33" (1/1) ... [2018-10-22 15:40:33,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:33" (1/1) ... [2018-10-22 15:40:33,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:33" (1/1) ... [2018-10-22 15:40:33,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:33" (1/1) ... [2018-10-22 15:40:33,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:40:33,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:40:33,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:40:33,634 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:40:33,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:40:33,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:40:33,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:40:34,150 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:40:34,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:40:34 BoogieIcfgContainer [2018-10-22 15:40:34,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:40:34,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:40:34,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:40:34,155 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:40:34,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:40:33" (1/3) ... [2018-10-22 15:40:34,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d54a90e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:40:34, skipping insertion in model container [2018-10-22 15:40:34,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:33" (2/3) ... [2018-10-22 15:40:34,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d54a90e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:40:34, skipping insertion in model container [2018-10-22 15:40:34,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:40:34" (3/3) ... [2018-10-22 15:40:34,159 INFO L112 eAbstractionObserver]: Analyzing ICFG array_false-unreach-call3_true-termination.i [2018-10-22 15:40:34,168 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:40:34,175 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:40:34,191 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:40:34,222 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:40:34,223 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:40:34,223 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:40:34,223 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:40:34,223 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:40:34,224 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:40:34,224 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:40:34,224 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:40:34,224 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:40:34,238 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2018-10-22 15:40:34,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-22 15:40:34,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:34,245 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:34,248 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:34,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:34,255 INFO L82 PathProgramCache]: Analyzing trace with hash 413615625, now seen corresponding path program 1 times [2018-10-22 15:40:34,257 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:34,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:34,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:34,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:34,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:34,376 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:40:34,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:40:34,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:40:34,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:40:34,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:40:34,396 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2018-10-22 15:40:34,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:34,410 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-10-22 15:40:34,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:40:34,412 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-10-22 15:40:34,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:34,425 INFO L225 Difference]: With dead ends: 29 [2018-10-22 15:40:34,425 INFO L226 Difference]: Without dead ends: 13 [2018-10-22 15:40:34,429 INFO L605 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 [2018-10-22 15:40:34,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-22 15:40:34,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-22 15:40:34,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-22 15:40:34,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-22 15:40:34,460 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2018-10-22 15:40:34,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:34,461 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-22 15:40:34,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:40:34,461 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-22 15:40:34,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:40:34,462 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:34,462 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:34,462 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:34,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:34,463 INFO L82 PathProgramCache]: Analyzing trace with hash 654469332, now seen corresponding path program 1 times [2018-10-22 15:40:34,463 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:34,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:34,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:34,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:34,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:34,518 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:40:34,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:40:34,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:40:34,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:40:34,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:40:34,521 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2018-10-22 15:40:34,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:34,658 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-10-22 15:40:34,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:40:34,658 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-10-22 15:40:34,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:34,659 INFO L225 Difference]: With dead ends: 31 [2018-10-22 15:40:34,659 INFO L226 Difference]: Without dead ends: 23 [2018-10-22 15:40:34,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:40:34,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-22 15:40:34,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2018-10-22 15:40:34,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-22 15:40:34,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-22 15:40:34,664 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-10-22 15:40:34,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:34,665 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-22 15:40:34,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:40:34,665 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-22 15:40:34,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 15:40:34,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:34,666 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:34,666 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:34,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:34,667 INFO L82 PathProgramCache]: Analyzing trace with hash -556557226, now seen corresponding path program 1 times [2018-10-22 15:40:34,667 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:34,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:34,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:34,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:34,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:34,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:34,741 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:34,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:34,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:34,884 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:34,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-10-22 15:40:34,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:40:34,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:40:34,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:40:34,887 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2018-10-22 15:40:35,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:35,134 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-10-22 15:40:35,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:40:35,134 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-22 15:40:35,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:35,135 INFO L225 Difference]: With dead ends: 41 [2018-10-22 15:40:35,136 INFO L226 Difference]: Without dead ends: 33 [2018-10-22 15:40:35,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:40:35,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-22 15:40:35,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2018-10-22 15:40:35,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 15:40:35,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-22 15:40:35,142 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-10-22 15:40:35,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:35,143 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-22 15:40:35,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:40:35,143 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-22 15:40:35,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 15:40:35,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:35,146 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:35,147 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:35,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:35,147 INFO L82 PathProgramCache]: Analyzing trace with hash -523460204, now seen corresponding path program 2 times [2018-10-22 15:40:35,147 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:35,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:35,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:35,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:35,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:35,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:35,421 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:35,436 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:40:35,465 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-10-22 15:40:35,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:35,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-22 15:40:35,553 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:40:35,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2018-10-22 15:40:35,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:40:35,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:40:35,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:40:35,555 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2018-10-22 15:40:35,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:35,845 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-10-22 15:40:35,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:40:35,845 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-10-22 15:40:35,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:35,846 INFO L225 Difference]: With dead ends: 45 [2018-10-22 15:40:35,846 INFO L226 Difference]: Without dead ends: 31 [2018-10-22 15:40:35,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:40:35,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-22 15:40:35,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2018-10-22 15:40:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-22 15:40:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-22 15:40:35,852 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 16 [2018-10-22 15:40:35,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:35,853 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-22 15:40:35,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:40:35,853 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-22 15:40:35,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-22 15:40:35,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:35,855 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:35,855 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:35,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:35,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1049275697, now seen corresponding path program 1 times [2018-10-22 15:40:35,856 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:35,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:35,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:35,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:35,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-22 15:40:35,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:35,999 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:36,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:36,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-22 15:40:36,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:36,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-10-22 15:40:36,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:40:36,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:40:36,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:40:36,118 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 7 states. [2018-10-22 15:40:36,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:36,273 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-10-22 15:40:36,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:40:36,276 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2018-10-22 15:40:36,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:36,277 INFO L225 Difference]: With dead ends: 57 [2018-10-22 15:40:36,277 INFO L226 Difference]: Without dead ends: 41 [2018-10-22 15:40:36,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:40:36,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-22 15:40:36,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-10-22 15:40:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-22 15:40:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-10-22 15:40:36,286 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2018-10-22 15:40:36,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:36,286 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-10-22 15:40:36,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:40:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-10-22 15:40:36,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-22 15:40:36,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:36,287 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:36,288 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:36,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:36,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1713030195, now seen corresponding path program 2 times [2018-10-22 15:40:36,288 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:36,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:36,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:36,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:36,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-22 15:40:36,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:36,695 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:36,711 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:40:36,753 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:40:36,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:36,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-22 15:40:36,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:36,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-10-22 15:40:36,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:40:36,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:40:36,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:40:36,796 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 8 states. [2018-10-22 15:40:36,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:36,929 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2018-10-22 15:40:36,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:40:36,929 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-10-22 15:40:36,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:36,930 INFO L225 Difference]: With dead ends: 67 [2018-10-22 15:40:36,930 INFO L226 Difference]: Without dead ends: 51 [2018-10-22 15:40:36,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:40:36,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-22 15:40:36,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 35. [2018-10-22 15:40:36,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-22 15:40:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-22 15:40:36,937 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2018-10-22 15:40:36,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:36,937 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-22 15:40:36,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:40:36,938 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-22 15:40:36,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-22 15:40:36,938 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:36,939 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:36,939 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:36,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:36,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1593849329, now seen corresponding path program 3 times [2018-10-22 15:40:36,940 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:36,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:36,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:36,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:36,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-22 15:40:37,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:37,094 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:37,102 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:40:37,156 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:40:37,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:37,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 15:40:37,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:37,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2018-10-22 15:40:37,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:40:37,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:40:37,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:40:37,242 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 10 states. [2018-10-22 15:40:37,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:37,733 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2018-10-22 15:40:37,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:40:37,734 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-10-22 15:40:37,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:37,735 INFO L225 Difference]: With dead ends: 71 [2018-10-22 15:40:37,735 INFO L226 Difference]: Without dead ends: 49 [2018-10-22 15:40:37,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:40:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-22 15:40:37,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2018-10-22 15:40:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-22 15:40:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-22 15:40:37,742 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 34 [2018-10-22 15:40:37,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:37,742 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-22 15:40:37,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:40:37,743 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-22 15:40:37,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-22 15:40:37,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:37,744 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:37,745 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:37,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:37,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1158062604, now seen corresponding path program 4 times [2018-10-22 15:40:37,745 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:37,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:37,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:37,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:37,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:40:37,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:37,927 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:37,936 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:40:38,001 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:40:38,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:38,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:38,135 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:40:38,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:38,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-10-22 15:40:38,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:40:38,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:40:38,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:40:38,163 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 10 states. [2018-10-22 15:40:38,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:38,319 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-10-22 15:40:38,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:40:38,320 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2018-10-22 15:40:38,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:38,322 INFO L225 Difference]: With dead ends: 84 [2018-10-22 15:40:38,322 INFO L226 Difference]: Without dead ends: 59 [2018-10-22 15:40:38,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:40:38,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-22 15:40:38,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2018-10-22 15:40:38,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-22 15:40:38,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-10-22 15:40:38,330 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2018-10-22 15:40:38,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:38,330 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-10-22 15:40:38,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:40:38,331 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-10-22 15:40:38,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-22 15:40:38,332 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:38,332 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:38,333 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:38,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:38,333 INFO L82 PathProgramCache]: Analyzing trace with hash 145127542, now seen corresponding path program 5 times [2018-10-22 15:40:38,333 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:38,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:38,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:38,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:38,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:40:39,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:39,107 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:40:39,114 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:40:39,191 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-22 15:40:39,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:39,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:40:39,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:39,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-10-22 15:40:39,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:40:39,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:40:39,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:40:39,237 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 11 states. [2018-10-22 15:40:39,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:39,376 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2018-10-22 15:40:39,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:40:39,379 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-10-22 15:40:39,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:39,380 INFO L225 Difference]: With dead ends: 94 [2018-10-22 15:40:39,381 INFO L226 Difference]: Without dead ends: 69 [2018-10-22 15:40:39,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:40:39,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-22 15:40:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 53. [2018-10-22 15:40:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-22 15:40:39,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-22 15:40:39,390 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2018-10-22 15:40:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:39,390 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-22 15:40:39,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:40:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-22 15:40:39,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-22 15:40:39,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:39,392 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:39,392 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:39,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:39,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1273378484, now seen corresponding path program 6 times [2018-10-22 15:40:39,392 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:39,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:39,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:39,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:39,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:40:39,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:39,581 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:40:39,590 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:40:39,683 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-22 15:40:39,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:39,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:40:39,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:39,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-10-22 15:40:39,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:40:39,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:40:39,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:40:39,732 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 12 states. [2018-10-22 15:40:39,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:39,894 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-22 15:40:39,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:40:39,901 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-10-22 15:40:39,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:39,902 INFO L225 Difference]: With dead ends: 104 [2018-10-22 15:40:39,902 INFO L226 Difference]: Without dead ends: 79 [2018-10-22 15:40:39,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:40:39,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-22 15:40:39,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2018-10-22 15:40:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-22 15:40:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-10-22 15:40:39,910 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2018-10-22 15:40:39,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:39,910 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-10-22 15:40:39,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:40:39,913 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-10-22 15:40:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-22 15:40:39,914 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:39,914 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:39,915 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:39,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:39,915 INFO L82 PathProgramCache]: Analyzing trace with hash 583133110, now seen corresponding path program 7 times [2018-10-22 15:40:39,915 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:39,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:39,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:39,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:39,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:40:40,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:40,151 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:40:40,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:40,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:40:40,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:40,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-10-22 15:40:40,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:40:40,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:40:40,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:40:40,264 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 13 states. [2018-10-22 15:40:40,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:40,451 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-10-22 15:40:40,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:40:40,452 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2018-10-22 15:40:40,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:40,453 INFO L225 Difference]: With dead ends: 114 [2018-10-22 15:40:40,453 INFO L226 Difference]: Without dead ends: 89 [2018-10-22 15:40:40,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:40:40,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-22 15:40:40,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2018-10-22 15:40:40,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-22 15:40:40,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-22 15:40:40,462 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 55 [2018-10-22 15:40:40,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:40,462 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-22 15:40:40,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:40:40,462 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-22 15:40:40,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-22 15:40:40,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:40,463 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:40,464 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:40,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:40,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1786609524, now seen corresponding path program 8 times [2018-10-22 15:40:40,464 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:40,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:40,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:40,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:40,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:40:40,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:40,782 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:40:40,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:40:40,845 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:40:40,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:40,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:40:40,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:40,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-10-22 15:40:40,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:40:40,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:40:40,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:40:40,903 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 14 states. [2018-10-22 15:40:41,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:41,061 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2018-10-22 15:40:41,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:40:41,062 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2018-10-22 15:40:41,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:41,063 INFO L225 Difference]: With dead ends: 124 [2018-10-22 15:40:41,064 INFO L226 Difference]: Without dead ends: 99 [2018-10-22 15:40:41,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:40:41,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-22 15:40:41,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2018-10-22 15:40:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-22 15:40:41,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-10-22 15:40:41,071 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 58 [2018-10-22 15:40:41,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:41,071 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-10-22 15:40:41,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:40:41,071 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-10-22 15:40:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-22 15:40:41,073 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:41,073 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:41,074 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:41,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:41,074 INFO L82 PathProgramCache]: Analyzing trace with hash 165471990, now seen corresponding path program 9 times [2018-10-22 15:40:41,074 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:41,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:41,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:41,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:41,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:40:41,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:41,404 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:40:41,418 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:40:41,472 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-22 15:40:41,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:41,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-10-22 15:40:41,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:41,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 16 [2018-10-22 15:40:41,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:40:41,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:40:41,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:40:41,685 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 16 states. [2018-10-22 15:40:42,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:42,082 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2018-10-22 15:40:42,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:40:42,082 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2018-10-22 15:40:42,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:42,084 INFO L225 Difference]: With dead ends: 122 [2018-10-22 15:40:42,084 INFO L226 Difference]: Without dead ends: 85 [2018-10-22 15:40:42,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:40:42,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-22 15:40:42,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2018-10-22 15:40:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-22 15:40:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-22 15:40:42,092 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 61 [2018-10-22 15:40:42,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:42,093 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-22 15:40:42,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:40:42,093 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-22 15:40:42,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-22 15:40:42,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:42,094 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:42,095 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:42,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:42,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1072616684, now seen corresponding path program 10 times [2018-10-22 15:40:42,095 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:42,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:42,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:42,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:42,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:40:42,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:42,371 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:40:42,400 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:40:42,471 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:40:42,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:42,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:40:42,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:42,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-10-22 15:40:42,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:40:42,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:40:42,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:40:42,549 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 16 states. [2018-10-22 15:40:42,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:42,690 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-10-22 15:40:42,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:40:42,690 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 82 [2018-10-22 15:40:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:42,691 INFO L225 Difference]: With dead ends: 138 [2018-10-22 15:40:42,692 INFO L226 Difference]: Without dead ends: 95 [2018-10-22 15:40:42,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:40:42,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-22 15:40:42,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2018-10-22 15:40:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-22 15:40:42,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-10-22 15:40:42,699 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 82 [2018-10-22 15:40:42,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:42,699 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-10-22 15:40:42,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:40:42,699 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-10-22 15:40:42,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-22 15:40:42,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:42,701 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:42,701 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:42,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:42,701 INFO L82 PathProgramCache]: Analyzing trace with hash -2114802538, now seen corresponding path program 11 times [2018-10-22 15:40:42,702 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:42,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:42,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:42,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:42,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:40:43,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:43,158 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:40:43,166 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:40:43,367 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-22 15:40:43,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:43,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:40:43,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:43,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-10-22 15:40:43,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:40:43,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:40:43,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:40:43,414 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 17 states. [2018-10-22 15:40:43,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:43,647 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2018-10-22 15:40:43,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:40:43,648 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-10-22 15:40:43,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:43,649 INFO L225 Difference]: With dead ends: 148 [2018-10-22 15:40:43,649 INFO L226 Difference]: Without dead ends: 105 [2018-10-22 15:40:43,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:40:43,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-22 15:40:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2018-10-22 15:40:43,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-22 15:40:43,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-22 15:40:43,655 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 85 [2018-10-22 15:40:43,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:43,656 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-22 15:40:43,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:40:43,656 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-22 15:40:43,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-22 15:40:43,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:43,657 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:43,657 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:43,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:43,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1554996268, now seen corresponding path program 12 times [2018-10-22 15:40:43,658 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:43,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:43,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:43,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:43,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:40:43,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:43,915 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:40:43,922 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:40:44,267 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-10-22 15:40:44,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:44,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:40:44,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:44,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-10-22 15:40:44,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:40:44,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:40:44,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:40:44,331 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 18 states. [2018-10-22 15:40:44,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:44,538 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-22 15:40:44,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:40:44,538 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 88 [2018-10-22 15:40:44,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:44,540 INFO L225 Difference]: With dead ends: 158 [2018-10-22 15:40:44,540 INFO L226 Difference]: Without dead ends: 115 [2018-10-22 15:40:44,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:40:44,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-22 15:40:44,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2018-10-22 15:40:44,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-22 15:40:44,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2018-10-22 15:40:44,548 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 88 [2018-10-22 15:40:44,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:44,548 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2018-10-22 15:40:44,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:40:44,549 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2018-10-22 15:40:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-22 15:40:44,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:44,550 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:44,550 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:44,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:44,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1724417066, now seen corresponding path program 13 times [2018-10-22 15:40:44,551 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:44,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:44,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:44,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:44,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:40:45,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:45,646 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:40:45,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:45,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:45,747 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:40:45,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:45,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-10-22 15:40:45,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:40:45,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:40:45,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:40:45,770 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 19 states. [2018-10-22 15:40:46,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:46,019 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2018-10-22 15:40:46,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:40:46,020 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2018-10-22 15:40:46,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:46,021 INFO L225 Difference]: With dead ends: 168 [2018-10-22 15:40:46,021 INFO L226 Difference]: Without dead ends: 125 [2018-10-22 15:40:46,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:40:46,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-22 15:40:46,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 95. [2018-10-22 15:40:46,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-22 15:40:46,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-22 15:40:46,027 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 91 [2018-10-22 15:40:46,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:46,027 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-22 15:40:46,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:40:46,028 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-22 15:40:46,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-22 15:40:46,029 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:46,029 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:46,029 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:46,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:46,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1942129812, now seen corresponding path program 14 times [2018-10-22 15:40:46,030 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:46,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:46,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:46,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:46,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:40:46,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:46,390 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:40:46,397 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:40:46,488 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:40:46,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:46,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:40:46,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:46,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-10-22 15:40:46,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:40:46,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:40:46,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:40:46,644 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 20 states. [2018-10-22 15:40:46,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:46,908 INFO L93 Difference]: Finished difference Result 178 states and 180 transitions. [2018-10-22 15:40:46,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-22 15:40:46,909 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2018-10-22 15:40:46,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:46,910 INFO L225 Difference]: With dead ends: 178 [2018-10-22 15:40:46,910 INFO L226 Difference]: Without dead ends: 135 [2018-10-22 15:40:46,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:40:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-22 15:40:46,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 98. [2018-10-22 15:40:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-22 15:40:46,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2018-10-22 15:40:46,915 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 94 [2018-10-22 15:40:46,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:46,915 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2018-10-22 15:40:46,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:40:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2018-10-22 15:40:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-22 15:40:46,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:46,916 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:46,917 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:46,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:46,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1863066858, now seen corresponding path program 15 times [2018-10-22 15:40:46,917 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:46,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:46,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:46,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:46,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:40:47,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:47,762 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:40:47,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:40:47,952 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-10-22 15:40:47,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:47,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-10-22 15:40:48,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:48,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 22 [2018-10-22 15:40:48,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:40:48,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:40:48,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:40:48,092 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 22 states. [2018-10-22 15:40:48,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:48,521 INFO L93 Difference]: Finished difference Result 176 states and 184 transitions. [2018-10-22 15:40:48,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:40:48,522 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 97 [2018-10-22 15:40:48,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:48,523 INFO L225 Difference]: With dead ends: 176 [2018-10-22 15:40:48,524 INFO L226 Difference]: Without dead ends: 121 [2018-10-22 15:40:48,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:40:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-22 15:40:48,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2018-10-22 15:40:48,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-22 15:40:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-22 15:40:48,528 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 97 [2018-10-22 15:40:48,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:48,529 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-22 15:40:48,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:40:48,529 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-22 15:40:48,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-22 15:40:48,530 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:48,530 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:48,530 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:48,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:48,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1303130060, now seen corresponding path program 16 times [2018-10-22 15:40:48,531 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:48,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:48,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:48,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:48,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:40:49,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:49,014 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:40:49,021 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:40:49,126 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:40:49,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:49,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:40:49,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:49,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-10-22 15:40:49,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:40:49,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:40:49,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:40:49,236 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 22 states. [2018-10-22 15:40:49,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:49,469 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2018-10-22 15:40:49,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 15:40:49,470 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 118 [2018-10-22 15:40:49,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:49,471 INFO L225 Difference]: With dead ends: 192 [2018-10-22 15:40:49,471 INFO L226 Difference]: Without dead ends: 131 [2018-10-22 15:40:49,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:40:49,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-22 15:40:49,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 122. [2018-10-22 15:40:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-22 15:40:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2018-10-22 15:40:49,477 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 118 [2018-10-22 15:40:49,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:49,478 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2018-10-22 15:40:49,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:40:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2018-10-22 15:40:49,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-22 15:40:49,479 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:49,479 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:49,479 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:49,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:49,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1686255798, now seen corresponding path program 17 times [2018-10-22 15:40:49,480 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:49,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:49,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:49,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:49,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:40:50,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:50,008 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:40:50,018 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:40:50,516 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-10-22 15:40:50,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:50,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:50,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:40:50,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:50,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-10-22 15:40:50,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:40:50,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:40:50,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:40:50,616 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 23 states. [2018-10-22 15:40:50,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:50,850 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2018-10-22 15:40:50,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:40:50,851 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2018-10-22 15:40:50,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:50,852 INFO L225 Difference]: With dead ends: 202 [2018-10-22 15:40:50,852 INFO L226 Difference]: Without dead ends: 141 [2018-10-22 15:40:50,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:40:50,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-22 15:40:50,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 125. [2018-10-22 15:40:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-22 15:40:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-10-22 15:40:50,857 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 121 [2018-10-22 15:40:50,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:50,857 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-10-22 15:40:50,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:40:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-10-22 15:40:50,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-22 15:40:50,858 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:50,858 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:50,859 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:50,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:50,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1961498380, now seen corresponding path program 18 times [2018-10-22 15:40:50,859 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:50,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:50,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:50,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:50,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:40:51,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:51,185 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:40:51,193 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:40:52,476 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-22 15:40:52,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:52,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:40:52,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:52,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-10-22 15:40:52,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 15:40:52,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 15:40:52,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:40:52,536 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 24 states. [2018-10-22 15:40:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:52,767 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-10-22 15:40:52,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:40:52,768 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2018-10-22 15:40:52,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:52,770 INFO L225 Difference]: With dead ends: 212 [2018-10-22 15:40:52,770 INFO L226 Difference]: Without dead ends: 151 [2018-10-22 15:40:52,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:40:52,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-22 15:40:52,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 128. [2018-10-22 15:40:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-22 15:40:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2018-10-22 15:40:52,775 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 124 [2018-10-22 15:40:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:52,775 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2018-10-22 15:40:52,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 15:40:52,775 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2018-10-22 15:40:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-22 15:40:52,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:52,776 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:52,776 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:52,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:52,776 INFO L82 PathProgramCache]: Analyzing trace with hash -943691786, now seen corresponding path program 19 times [2018-10-22 15:40:52,777 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:52,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:52,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:52,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:52,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1167 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:40:53,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:53,473 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:40:53,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:53,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1167 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:40:53,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:53,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-10-22 15:40:53,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:40:53,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:40:53,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:40:53,634 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand 25 states. [2018-10-22 15:40:53,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:53,867 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2018-10-22 15:40:53,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 15:40:53,867 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 127 [2018-10-22 15:40:53,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:53,869 INFO L225 Difference]: With dead ends: 222 [2018-10-22 15:40:53,869 INFO L226 Difference]: Without dead ends: 161 [2018-10-22 15:40:53,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:40:53,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-22 15:40:53,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 131. [2018-10-22 15:40:53,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-22 15:40:53,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-10-22 15:40:53,873 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 127 [2018-10-22 15:40:53,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:53,873 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-10-22 15:40:53,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:40:53,873 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-10-22 15:40:53,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-22 15:40:53,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:53,874 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:53,874 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:53,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:53,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1936559692, now seen corresponding path program 20 times [2018-10-22 15:40:53,875 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:53,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:53,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:53,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:53,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:40:55,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:55,573 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:40:55,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:40:55,671 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:40:55,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:55,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:40:55,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:55,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-10-22 15:40:55,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-22 15:40:55,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-22 15:40:55,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:40:55,731 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 26 states. [2018-10-22 15:40:56,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:56,071 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2018-10-22 15:40:56,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-22 15:40:56,072 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 130 [2018-10-22 15:40:56,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:56,073 INFO L225 Difference]: With dead ends: 232 [2018-10-22 15:40:56,073 INFO L226 Difference]: Without dead ends: 171 [2018-10-22 15:40:56,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:40:56,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-22 15:40:56,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 134. [2018-10-22 15:40:56,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-22 15:40:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2018-10-22 15:40:56,079 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 130 [2018-10-22 15:40:56,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:56,079 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2018-10-22 15:40:56,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-22 15:40:56,079 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2018-10-22 15:40:56,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-22 15:40:56,080 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:56,080 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:56,080 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:56,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:56,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1024579786, now seen corresponding path program 21 times [2018-10-22 15:40:56,081 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:56,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:56,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:56,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:56,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:40:56,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:56,489 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:40:56,503 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:40:57,293 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-10-22 15:40:57,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:57,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-10-22 15:40:57,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:57,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 28 [2018-10-22 15:40:57,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:40:57,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:40:57,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:40:57,563 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 28 states. [2018-10-22 15:40:58,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:58,056 INFO L93 Difference]: Finished difference Result 230 states and 238 transitions. [2018-10-22 15:40:58,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 15:40:58,057 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 133 [2018-10-22 15:40:58,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:58,058 INFO L225 Difference]: With dead ends: 230 [2018-10-22 15:40:58,058 INFO L226 Difference]: Without dead ends: 157 [2018-10-22 15:40:58,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=407, Invalid=715, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:40:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-22 15:40:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2018-10-22 15:40:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-22 15:40:58,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-10-22 15:40:58,064 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 133 [2018-10-22 15:40:58,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:58,065 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-10-22 15:40:58,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:40:58,065 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-10-22 15:40:58,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-22 15:40:58,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:58,066 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:58,066 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:58,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:58,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1464552788, now seen corresponding path program 22 times [2018-10-22 15:40:58,067 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:58,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:58,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:58,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:58,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-22 15:41:00,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:00,366 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:41:00,382 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:41:00,495 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:41:00,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:00,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-22 15:41:00,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:00,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-10-22 15:41:00,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:41:00,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:41:00,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:41:00,565 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 28 states. [2018-10-22 15:41:01,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:01,529 INFO L93 Difference]: Finished difference Result 246 states and 248 transitions. [2018-10-22 15:41:01,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 15:41:01,529 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2018-10-22 15:41:01,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:01,530 INFO L225 Difference]: With dead ends: 246 [2018-10-22 15:41:01,531 INFO L226 Difference]: Without dead ends: 167 [2018-10-22 15:41:01,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:41:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-22 15:41:01,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 158. [2018-10-22 15:41:01,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-22 15:41:01,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2018-10-22 15:41:01,534 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 154 [2018-10-22 15:41:01,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:01,535 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2018-10-22 15:41:01,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:41:01,535 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2018-10-22 15:41:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-22 15:41:01,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:01,536 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:01,536 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:01,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:01,536 INFO L82 PathProgramCache]: Analyzing trace with hash 866065622, now seen corresponding path program 23 times [2018-10-22 15:41:01,536 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:01,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:01,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:01,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:01,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-22 15:41:02,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:02,693 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:41:02,700 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:41:03,552 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-22 15:41:03,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:03,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-22 15:41:03,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:03,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-10-22 15:41:03,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:41:03,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:41:03,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:41:03,643 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand 29 states. [2018-10-22 15:41:03,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:03,956 INFO L93 Difference]: Finished difference Result 256 states and 258 transitions. [2018-10-22 15:41:03,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 15:41:03,956 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2018-10-22 15:41:03,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:03,958 INFO L225 Difference]: With dead ends: 256 [2018-10-22 15:41:03,958 INFO L226 Difference]: Without dead ends: 177 [2018-10-22 15:41:03,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:41:03,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-22 15:41:03,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 161. [2018-10-22 15:41:03,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-22 15:41:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-10-22 15:41:03,963 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 157 [2018-10-22 15:41:03,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:03,964 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-10-22 15:41:03,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:41:03,964 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-10-22 15:41:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-22 15:41:03,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:03,965 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:03,965 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:03,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:03,965 INFO L82 PathProgramCache]: Analyzing trace with hash -255850988, now seen corresponding path program 24 times [2018-10-22 15:41:03,966 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:03,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:03,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:03,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:03,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1903 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-22 15:41:04,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:04,735 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:41:04,742 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:41:08,645 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-22 15:41:08,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:08,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2018-10-22 15:41:09,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:09,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 31 [2018-10-22 15:41:09,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:41:09,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:41:09,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:41:09,178 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 31 states. [2018-10-22 15:41:10,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:10,433 INFO L93 Difference]: Finished difference Result 260 states and 265 transitions. [2018-10-22 15:41:10,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 15:41:10,434 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 160 [2018-10-22 15:41:10,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:10,435 INFO L225 Difference]: With dead ends: 260 [2018-10-22 15:41:10,435 INFO L226 Difference]: Without dead ends: 175 [2018-10-22 15:41:10,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=455, Invalid=667, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:41:10,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-22 15:41:10,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2018-10-22 15:41:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-22 15:41:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-10-22 15:41:10,441 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 160 [2018-10-22 15:41:10,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:10,441 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-10-22 15:41:10,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:41:10,441 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-10-22 15:41:10,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-22 15:41:10,442 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:10,442 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:10,443 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:10,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:10,443 INFO L82 PathProgramCache]: Analyzing trace with hash 793918641, now seen corresponding path program 25 times [2018-10-22 15:41:10,443 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:10,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:10,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:10,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:10,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-10-22 15:41:10,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:10,911 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:41:10,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:11,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-10-22 15:41:11,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:11,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-10-22 15:41:11,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:41:11,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:41:11,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:41:11,130 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 31 states. [2018-10-22 15:41:11,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:11,490 INFO L93 Difference]: Finished difference Result 273 states and 275 transitions. [2018-10-22 15:41:11,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 15:41:11,491 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 172 [2018-10-22 15:41:11,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:11,492 INFO L225 Difference]: With dead ends: 273 [2018-10-22 15:41:11,492 INFO L226 Difference]: Without dead ends: 185 [2018-10-22 15:41:11,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:41:11,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-22 15:41:11,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 176. [2018-10-22 15:41:11,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-22 15:41:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2018-10-22 15:41:11,498 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 172 [2018-10-22 15:41:11,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:11,499 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2018-10-22 15:41:11,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:41:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2018-10-22 15:41:11,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-22 15:41:11,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:11,500 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:11,500 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:11,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:11,501 INFO L82 PathProgramCache]: Analyzing trace with hash -227151949, now seen corresponding path program 26 times [2018-10-22 15:41:11,501 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:11,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:11,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:11,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:11,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-10-22 15:41:11,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:11,984 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:41:11,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:41:12,117 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:41:12,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:12,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-10-22 15:41:12,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:12,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-10-22 15:41:12,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-22 15:41:12,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-22 15:41:12,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:41:12,227 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand 32 states. [2018-10-22 15:41:12,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:12,538 INFO L93 Difference]: Finished difference Result 283 states and 285 transitions. [2018-10-22 15:41:12,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 15:41:12,538 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 175 [2018-10-22 15:41:12,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:12,540 INFO L225 Difference]: With dead ends: 283 [2018-10-22 15:41:12,540 INFO L226 Difference]: Without dead ends: 195 [2018-10-22 15:41:12,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:41:12,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-22 15:41:12,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 179. [2018-10-22 15:41:12,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-22 15:41:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-10-22 15:41:12,546 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 175 [2018-10-22 15:41:12,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:12,546 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-10-22 15:41:12,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-22 15:41:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-10-22 15:41:12,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-22 15:41:12,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:12,547 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:12,548 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:12,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:12,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1982708367, now seen corresponding path program 27 times [2018-10-22 15:41:12,548 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:12,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:12,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:12,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:12,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2383 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-10-22 15:41:13,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:13,112 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:41:13,119 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:41:15,734 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-22 15:41:15,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:15,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2383 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-10-22 15:41:15,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:15,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 34 [2018-10-22 15:41:15,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-22 15:41:15,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-22 15:41:15,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:41:15,852 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 34 states. [2018-10-22 15:41:16,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:16,329 INFO L93 Difference]: Finished difference Result 287 states and 292 transitions. [2018-10-22 15:41:16,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 15:41:16,330 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 178 [2018-10-22 15:41:16,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:16,331 INFO L225 Difference]: With dead ends: 287 [2018-10-22 15:41:16,332 INFO L226 Difference]: Without dead ends: 193 [2018-10-22 15:41:16,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=548, Invalid=784, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:41:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-22 15:41:16,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2018-10-22 15:41:16,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-22 15:41:16,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-10-22 15:41:16,337 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 178 [2018-10-22 15:41:16,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:16,337 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-10-22 15:41:16,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-22 15:41:16,338 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-10-22 15:41:16,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-22 15:41:16,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:16,339 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:16,339 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:16,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:16,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1577165428, now seen corresponding path program 28 times [2018-10-22 15:41:16,340 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:16,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:16,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:16,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:16,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-22 15:41:17,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:17,735 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:17,742 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:41:17,881 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:41:17,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:17,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-22 15:41:17,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:17,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-10-22 15:41:17,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-22 15:41:17,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-22 15:41:17,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:41:17,966 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 34 states. [2018-10-22 15:41:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:18,325 INFO L93 Difference]: Finished difference Result 300 states and 302 transitions. [2018-10-22 15:41:18,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-22 15:41:18,326 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 190 [2018-10-22 15:41:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:18,327 INFO L225 Difference]: With dead ends: 300 [2018-10-22 15:41:18,327 INFO L226 Difference]: Without dead ends: 203 [2018-10-22 15:41:18,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:41:18,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-22 15:41:18,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 194. [2018-10-22 15:41:18,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-22 15:41:18,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2018-10-22 15:41:18,333 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 190 [2018-10-22 15:41:18,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:18,333 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2018-10-22 15:41:18,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-22 15:41:18,333 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2018-10-22 15:41:18,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-22 15:41:18,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:18,334 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:18,335 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:18,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:18,335 INFO L82 PathProgramCache]: Analyzing trace with hash 2081642742, now seen corresponding path program 29 times [2018-10-22 15:41:18,335 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:18,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:18,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:18,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:18,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-22 15:41:19,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:19,390 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:19,397 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:41:21,087 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2018-10-22 15:41:21,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:21,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-22 15:41:21,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:21,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-10-22 15:41:21,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:41:21,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:41:21,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:41:21,280 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 35 states. [2018-10-22 15:41:21,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:21,609 INFO L93 Difference]: Finished difference Result 310 states and 312 transitions. [2018-10-22 15:41:21,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-22 15:41:21,609 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 193 [2018-10-22 15:41:21,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:21,611 INFO L225 Difference]: With dead ends: 310 [2018-10-22 15:41:21,611 INFO L226 Difference]: Without dead ends: 213 [2018-10-22 15:41:21,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:41:21,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-22 15:41:21,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 197. [2018-10-22 15:41:21,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-22 15:41:21,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-10-22 15:41:21,617 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 193 [2018-10-22 15:41:21,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:21,617 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-10-22 15:41:21,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:41:21,617 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-10-22 15:41:21,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-22 15:41:21,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:21,618 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:21,619 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:21,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:21,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1420231884, now seen corresponding path program 30 times [2018-10-22 15:41:21,619 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:21,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:21,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:21,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:21,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2917 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-22 15:41:22,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:22,287 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:22,294 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:41:44,472 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2018-10-22 15:41:44,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:44,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2917 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-22 15:41:44,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:44,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-10-22 15:41:44,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-22 15:41:44,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-22 15:41:44,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:41:44,582 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 36 states. [2018-10-22 15:41:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:44,982 INFO L93 Difference]: Finished difference Result 320 states and 322 transitions. [2018-10-22 15:41:44,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 15:41:44,983 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 196 [2018-10-22 15:41:44,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:44,984 INFO L225 Difference]: With dead ends: 320 [2018-10-22 15:41:44,984 INFO L226 Difference]: Without dead ends: 223 [2018-10-22 15:41:44,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:41:44,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-22 15:41:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 200. [2018-10-22 15:41:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-22 15:41:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2018-10-22 15:41:44,987 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 196 [2018-10-22 15:41:44,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:44,988 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2018-10-22 15:41:44,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-22 15:41:44,988 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2018-10-22 15:41:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-10-22 15:41:44,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:44,989 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:44,989 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:44,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:44,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1011595210, now seen corresponding path program 31 times [2018-10-22 15:41:44,989 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:44,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:44,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:44,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:44,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-22 15:41:45,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:45,597 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:45,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:45,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-22 15:41:45,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:45,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-10-22 15:41:45,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:41:45,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:41:45,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:41:45,912 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand 37 states. [2018-10-22 15:41:47,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:47,027 INFO L93 Difference]: Finished difference Result 330 states and 332 transitions. [2018-10-22 15:41:47,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-22 15:41:47,027 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 199 [2018-10-22 15:41:47,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:47,029 INFO L225 Difference]: With dead ends: 330 [2018-10-22 15:41:47,029 INFO L226 Difference]: Without dead ends: 233 [2018-10-22 15:41:47,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:41:47,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-10-22 15:41:47,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 203. [2018-10-22 15:41:47,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-22 15:41:47,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-10-22 15:41:47,035 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 199 [2018-10-22 15:41:47,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:47,035 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-10-22 15:41:47,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:41:47,035 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-10-22 15:41:47,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-22 15:41:47,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:47,036 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:47,037 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:47,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:47,037 INFO L82 PathProgramCache]: Analyzing trace with hash 746243060, now seen corresponding path program 32 times [2018-10-22 15:41:47,037 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:47,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:47,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:47,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:47,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-22 15:41:47,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:47,886 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:47,894 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:41:48,042 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:41:48,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:48,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-22 15:41:48,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:48,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-10-22 15:41:48,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-22 15:41:48,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-22 15:41:48,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:41:48,168 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 38 states. [2018-10-22 15:41:48,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:48,523 INFO L93 Difference]: Finished difference Result 340 states and 342 transitions. [2018-10-22 15:41:48,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-22 15:41:48,523 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 202 [2018-10-22 15:41:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:48,525 INFO L225 Difference]: With dead ends: 340 [2018-10-22 15:41:48,526 INFO L226 Difference]: Without dead ends: 243 [2018-10-22 15:41:48,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:41:48,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-22 15:41:48,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 206. [2018-10-22 15:41:48,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-10-22 15:41:48,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2018-10-22 15:41:48,531 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 202 [2018-10-22 15:41:48,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:48,532 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2018-10-22 15:41:48,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-22 15:41:48,532 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2018-10-22 15:41:48,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-10-22 15:41:48,533 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:48,533 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:48,533 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:48,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:48,534 INFO L82 PathProgramCache]: Analyzing trace with hash -30095498, now seen corresponding path program 33 times [2018-10-22 15:41:48,534 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:48,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:48,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:48,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:48,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3220 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-22 15:41:49,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:49,992 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:49,999 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:41:52,041 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2018-10-22 15:41:52,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:52,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3220 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2018-10-22 15:41:52,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:52,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34] total 40 [2018-10-22 15:41:52,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:41:52,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:41:52,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:41:52,124 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand 40 states. [2018-10-22 15:41:52,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:52,620 INFO L93 Difference]: Finished difference Result 338 states and 346 transitions. [2018-10-22 15:41:52,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-22 15:41:52,620 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 205 [2018-10-22 15:41:52,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:52,622 INFO L225 Difference]: With dead ends: 338 [2018-10-22 15:41:52,622 INFO L226 Difference]: Without dead ends: 229 [2018-10-22 15:41:52,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=797, Invalid=1273, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:41:52,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-10-22 15:41:52,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2018-10-22 15:41:52,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-22 15:41:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2018-10-22 15:41:52,628 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 205 [2018-10-22 15:41:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:52,629 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2018-10-22 15:41:52,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:41:52,629 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2018-10-22 15:41:52,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-22 15:41:52,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:52,630 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:52,630 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:52,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:52,631 INFO L82 PathProgramCache]: Analyzing trace with hash -16724076, now seen corresponding path program 34 times [2018-10-22 15:41:52,631 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:52,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:52,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:52,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:52,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:41:53,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:53,329 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-22 15:41:53,338 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:53,504 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:41:53,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:53,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:41:53,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:53,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-10-22 15:41:53,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:41:53,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:41:53,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:41:53,605 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 40 states. [2018-10-22 15:41:54,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:54,901 INFO L93 Difference]: Finished difference Result 354 states and 356 transitions. [2018-10-22 15:41:54,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-22 15:41:54,901 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 226 [2018-10-22 15:41:54,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:54,903 INFO L225 Difference]: With dead ends: 354 [2018-10-22 15:41:54,903 INFO L226 Difference]: Without dead ends: 239 [2018-10-22 15:41:54,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:41:54,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-22 15:41:54,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 230. [2018-10-22 15:41:54,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-10-22 15:41:54,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 231 transitions. [2018-10-22 15:41:54,910 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 231 transitions. Word has length 226 [2018-10-22 15:41:54,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:54,910 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 231 transitions. [2018-10-22 15:41:54,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:41:54,911 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 231 transitions. [2018-10-22 15:41:54,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-10-22 15:41:54,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:54,912 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:54,913 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:54,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:54,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1948839190, now seen corresponding path program 35 times [2018-10-22 15:41:54,913 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:54,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:54,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:54,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:54,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4034 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:41:55,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:55,897 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:55,914 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:41:58,157 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-10-22 15:41:58,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:58,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4034 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:41:58,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:58,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-10-22 15:41:58,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:41:58,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:41:58,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:41:58,278 INFO L87 Difference]: Start difference. First operand 230 states and 231 transitions. Second operand 41 states. [2018-10-22 15:41:58,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:58,754 INFO L93 Difference]: Finished difference Result 364 states and 366 transitions. [2018-10-22 15:41:58,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-22 15:41:58,755 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 229 [2018-10-22 15:41:58,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:58,756 INFO L225 Difference]: With dead ends: 364 [2018-10-22 15:41:58,756 INFO L226 Difference]: Without dead ends: 249 [2018-10-22 15:41:58,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:41:58,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-10-22 15:41:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 233. [2018-10-22 15:41:58,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-10-22 15:41:58,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 234 transitions. [2018-10-22 15:41:58,761 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 234 transitions. Word has length 229 [2018-10-22 15:41:58,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:58,762 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 234 transitions. [2018-10-22 15:41:58,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 15:41:58,762 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 234 transitions. [2018-10-22 15:41:58,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-22 15:41:58,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:58,763 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:58,763 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:58,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:58,763 INFO L82 PathProgramCache]: Analyzing trace with hash 459982932, now seen corresponding path program 36 times [2018-10-22 15:41:58,763 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:58,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:58,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:58,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:58,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4147 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:41:59,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:59,568 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:59,576 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:43:19,010 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-10-22 15:43:19,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:19,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4147 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:43:19,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:19,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-10-22 15:43:19,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-22 15:43:19,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-22 15:43:19,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:43:19,172 INFO L87 Difference]: Start difference. First operand 233 states and 234 transitions. Second operand 42 states. [2018-10-22 15:43:19,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:19,618 INFO L93 Difference]: Finished difference Result 374 states and 376 transitions. [2018-10-22 15:43:19,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-22 15:43:19,618 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 232 [2018-10-22 15:43:19,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:19,620 INFO L225 Difference]: With dead ends: 374 [2018-10-22 15:43:19,620 INFO L226 Difference]: Without dead ends: 259 [2018-10-22 15:43:19,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:43:19,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-22 15:43:19,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 236. [2018-10-22 15:43:19,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-10-22 15:43:19,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 237 transitions. [2018-10-22 15:43:19,626 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 237 transitions. Word has length 232 [2018-10-22 15:43:19,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:19,627 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 237 transitions. [2018-10-22 15:43:19,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-22 15:43:19,627 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 237 transitions. [2018-10-22 15:43:19,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-22 15:43:19,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:19,628 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:19,629 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:19,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:19,629 INFO L82 PathProgramCache]: Analyzing trace with hash 70466646, now seen corresponding path program 37 times [2018-10-22 15:43:19,629 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:19,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:19,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:19,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:19,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4263 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:43:20,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:20,696 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:20,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:43:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:20,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4263 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:43:20,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:20,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-10-22 15:43:20,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-22 15:43:20,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-22 15:43:20,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:43:20,985 INFO L87 Difference]: Start difference. First operand 236 states and 237 transitions. Second operand 43 states. [2018-10-22 15:43:21,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:21,457 INFO L93 Difference]: Finished difference Result 384 states and 386 transitions. [2018-10-22 15:43:21,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-22 15:43:21,457 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 235 [2018-10-22 15:43:21,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:21,458 INFO L225 Difference]: With dead ends: 384 [2018-10-22 15:43:21,459 INFO L226 Difference]: Without dead ends: 269 [2018-10-22 15:43:21,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:43:21,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-10-22 15:43:21,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 239. [2018-10-22 15:43:21,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-10-22 15:43:21,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2018-10-22 15:43:21,464 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 235 [2018-10-22 15:43:21,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:21,465 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2018-10-22 15:43:21,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-22 15:43:21,465 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2018-10-22 15:43:21,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-22 15:43:21,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:21,466 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:21,467 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:21,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:21,467 INFO L82 PathProgramCache]: Analyzing trace with hash 992424212, now seen corresponding path program 38 times [2018-10-22 15:43:21,467 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:21,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:21,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:21,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:43:21,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4382 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:43:22,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:22,803 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:22,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:43:22,982 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:43:22,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:22,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4382 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:43:23,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:23,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-10-22 15:43:23,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-22 15:43:23,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-22 15:43:23,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:43:23,055 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand 44 states. [2018-10-22 15:43:23,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:23,487 INFO L93 Difference]: Finished difference Result 394 states and 396 transitions. [2018-10-22 15:43:23,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-22 15:43:23,487 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 238 [2018-10-22 15:43:23,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:23,489 INFO L225 Difference]: With dead ends: 394 [2018-10-22 15:43:23,489 INFO L226 Difference]: Without dead ends: 279 [2018-10-22 15:43:23,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:43:23,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-22 15:43:23,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 242. [2018-10-22 15:43:23,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-10-22 15:43:23,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 243 transitions. [2018-10-22 15:43:23,495 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 243 transitions. Word has length 238 [2018-10-22 15:43:23,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:23,496 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 243 transitions. [2018-10-22 15:43:23,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-22 15:43:23,496 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 243 transitions. [2018-10-22 15:43:23,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-10-22 15:43:23,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:23,497 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:23,498 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:23,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:23,498 INFO L82 PathProgramCache]: Analyzing trace with hash 714414998, now seen corresponding path program 39 times [2018-10-22 15:43:23,498 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:23,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:23,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:23,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:23,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4504 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:43:25,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:25,292 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:25,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:43:42,471 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2018-10-22 15:43:42,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:42,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4504 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2018-10-22 15:43:42,700 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:42,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 40] total 46 [2018-10-22 15:43:42,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-22 15:43:42,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-22 15:43:42,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:43:42,702 INFO L87 Difference]: Start difference. First operand 242 states and 243 transitions. Second operand 46 states. [2018-10-22 15:43:43,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:43,279 INFO L93 Difference]: Finished difference Result 392 states and 400 transitions. [2018-10-22 15:43:43,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-22 15:43:43,279 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 241 [2018-10-22 15:43:43,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:43,281 INFO L225 Difference]: With dead ends: 392 [2018-10-22 15:43:43,281 INFO L226 Difference]: Without dead ends: 265 [2018-10-22 15:43:43,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1046, Invalid=1606, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:43:43,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-10-22 15:43:43,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 263. [2018-10-22 15:43:43,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-10-22 15:43:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 264 transitions. [2018-10-22 15:43:43,287 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 264 transitions. Word has length 241 [2018-10-22 15:43:43,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:43,288 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 264 transitions. [2018-10-22 15:43:43,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-22 15:43:43,288 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 264 transitions. [2018-10-22 15:43:43,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-22 15:43:43,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:43,289 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:43,289 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:43,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:43,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1672293196, now seen corresponding path program 40 times [2018-10-22 15:43:43,290 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:43,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:43,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:43,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:43,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-22 15:43:44,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:44,268 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:44,276 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:43:44,471 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:43:44,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:44,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-22 15:43:44,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:44,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-10-22 15:43:44,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-22 15:43:44,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-22 15:43:44,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:43:44,589 INFO L87 Difference]: Start difference. First operand 263 states and 264 transitions. Second operand 46 states. [2018-10-22 15:43:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:46,014 INFO L93 Difference]: Finished difference Result 408 states and 410 transitions. [2018-10-22 15:43:46,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-22 15:43:46,014 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 262 [2018-10-22 15:43:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:46,015 INFO L225 Difference]: With dead ends: 408 [2018-10-22 15:43:46,015 INFO L226 Difference]: Without dead ends: 275 [2018-10-22 15:43:46,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:43:46,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-10-22 15:43:46,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 266. [2018-10-22 15:43:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-10-22 15:43:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 267 transitions. [2018-10-22 15:43:46,021 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 267 transitions. Word has length 262 [2018-10-22 15:43:46,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:46,022 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 267 transitions. [2018-10-22 15:43:46,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-22 15:43:46,022 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 267 transitions. [2018-10-22 15:43:46,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-10-22 15:43:46,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:46,024 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:46,024 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:46,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:46,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1683367626, now seen corresponding path program 41 times [2018-10-22 15:43:46,024 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:46,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:46,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:46,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:46,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5462 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-22 15:43:46,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:46,972 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:46,981 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:44:05,565 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) [2018-10-22 15:44:05,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:05,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5462 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-22 15:44:05,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:05,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-10-22 15:44:05,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-22 15:44:05,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-22 15:44:05,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:44:05,685 INFO L87 Difference]: Start difference. First operand 266 states and 267 transitions. Second operand 47 states. [2018-10-22 15:44:06,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:06,226 INFO L93 Difference]: Finished difference Result 418 states and 420 transitions. [2018-10-22 15:44:06,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-22 15:44:06,227 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 265 [2018-10-22 15:44:06,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:06,229 INFO L225 Difference]: With dead ends: 418 [2018-10-22 15:44:06,229 INFO L226 Difference]: Without dead ends: 285 [2018-10-22 15:44:06,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:44:06,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-10-22 15:44:06,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 269. [2018-10-22 15:44:06,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-10-22 15:44:06,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2018-10-22 15:44:06,234 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 265 [2018-10-22 15:44:06,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:06,234 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2018-10-22 15:44:06,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-22 15:44:06,234 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2018-10-22 15:44:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-10-22 15:44:06,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:06,236 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:06,236 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:06,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:06,236 INFO L82 PathProgramCache]: Analyzing trace with hash -889229964, now seen corresponding path program 42 times [2018-10-22 15:44:06,236 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:06,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:06,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:06,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:06,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5593 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-22 15:44:07,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:07,723 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:44:07,732 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown