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-lit/gr2006_true-unreach-call_true-termination.c.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:50:24,157 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:50:24,159 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:50:24,171 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:50:24,171 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:50:24,173 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:50:24,174 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:50:24,176 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:50:24,178 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:50:24,178 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:50:24,179 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:50:24,180 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:50:24,181 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:50:24,182 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:50:24,183 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:50:24,184 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:50:24,185 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:50:24,187 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:50:24,189 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:50:24,190 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:50:24,191 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:50:24,192 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:50:24,195 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:50:24,204 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 15:50:24,219 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:50:24,220 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:50:24,221 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:50:24,221 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:50:24,221 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:50:24,222 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:50:24,222 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:50:24,222 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:50:24,222 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:50:24,223 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:50:24,223 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:50:24,223 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:50:24,223 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:50:24,223 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:50:24,224 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:50:24,224 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:50:24,224 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:50:24,224 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:50:24,224 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:50:24,225 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:50:24,225 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:50:24,225 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:50:24,225 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:50:24,226 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:50:24,226 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:50:24,226 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:50:24,226 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:50:24,226 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:50:24,278 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:50:24,299 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:50:24,303 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:50:24,305 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:50:24,305 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:50:24,306 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-lit/gr2006_true-unreach-call_true-termination.c.i [2018-10-22 15:50:24,373 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0c2ab8605/c70f946f6a1946348caeb5f1bc7558ae/FLAG2077415c7 [2018-10-22 15:50:24,842 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:50:24,842 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gr2006_true-unreach-call_true-termination.c.i [2018-10-22 15:50:24,848 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0c2ab8605/c70f946f6a1946348caeb5f1bc7558ae/FLAG2077415c7 [2018-10-22 15:50:24,861 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0c2ab8605/c70f946f6a1946348caeb5f1bc7558ae [2018-10-22 15:50:24,870 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:50:24,871 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:50:24,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:50:24,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:50:24,876 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:50:24,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:50:24" (1/1) ... [2018-10-22 15:50:24,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5907bacc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:24, skipping insertion in model container [2018-10-22 15:50:24,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:50:24" (1/1) ... [2018-10-22 15:50:24,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:50:24,917 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:50:25,071 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:50:25,075 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:50:25,092 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:50:25,108 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:50:25,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:25 WrapperNode [2018-10-22 15:50:25,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:50:25,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:50:25,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:50:25,110 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:50:25,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:25" (1/1) ... [2018-10-22 15:50:25,126 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:25" (1/1) ... [2018-10-22 15:50:25,145 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:50:25,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:50:25,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:50:25,146 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:50:25,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:25" (1/1) ... [2018-10-22 15:50:25,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:25" (1/1) ... [2018-10-22 15:50:25,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:25" (1/1) ... [2018-10-22 15:50:25,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:25" (1/1) ... [2018-10-22 15:50:25,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:25" (1/1) ... [2018-10-22 15:50:25,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:25" (1/1) ... [2018-10-22 15:50:25,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:25" (1/1) ... [2018-10-22 15:50:25,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:50:25,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:50:25,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:50:25,167 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:50:25,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:25" (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 15:50:25,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:50:25,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:50:25,479 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:50:25,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:50:25 BoogieIcfgContainer [2018-10-22 15:50:25,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:50:25,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:50:25,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:50:25,484 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:50:25,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:50:24" (1/3) ... [2018-10-22 15:50:25,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a0ed7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:50:25, skipping insertion in model container [2018-10-22 15:50:25,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:25" (2/3) ... [2018-10-22 15:50:25,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a0ed7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:50:25, skipping insertion in model container [2018-10-22 15:50:25,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:50:25" (3/3) ... [2018-10-22 15:50:25,488 INFO L112 eAbstractionObserver]: Analyzing ICFG gr2006_true-unreach-call_true-termination.c.i [2018-10-22 15:50:25,497 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:50:25,506 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:50:25,523 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:50:25,555 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:50:25,555 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:50:25,555 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:50:25,555 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:50:25,556 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:50:25,556 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:50:25,556 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:50:25,556 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:50:25,556 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:50:25,569 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-10-22 15:50:25,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-22 15:50:25,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:25,576 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-22 15:50:25,578 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:25,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:25,585 INFO L82 PathProgramCache]: Analyzing trace with hash 890122407, now seen corresponding path program 1 times [2018-10-22 15:50:25,587 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:25,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:25,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:25,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:25,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:25,693 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 15:50:25,695 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:50:25,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:50:25,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:50:25,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:50:25,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:50:25,715 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2018-10-22 15:50:25,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:25,732 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2018-10-22 15:50:25,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:50:25,734 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-22 15:50:25,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:25,747 INFO L225 Difference]: With dead ends: 22 [2018-10-22 15:50:25,747 INFO L226 Difference]: Without dead ends: 10 [2018-10-22 15:50:25,751 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 15:50:25,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-22 15:50:25,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-22 15:50:25,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-22 15:50:25,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-10-22 15:50:25,785 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2018-10-22 15:50:25,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:25,785 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-10-22 15:50:25,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:50:25,786 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-10-22 15:50:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-22 15:50:25,786 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:25,787 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:25,787 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:25,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:25,787 INFO L82 PathProgramCache]: Analyzing trace with hash 384096848, now seen corresponding path program 1 times [2018-10-22 15:50:25,788 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:25,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:25,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:25,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:25,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:25,915 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 15:50:25,916 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:50:25,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:50:25,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:50:25,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:50:25,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:50:25,924 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2018-10-22 15:50:26,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:26,042 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2018-10-22 15:50:26,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:50:26,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-10-22 15:50:26,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:26,043 INFO L225 Difference]: With dead ends: 26 [2018-10-22 15:50:26,044 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 15:50:26,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:50:26,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 15:50:26,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2018-10-22 15:50:26,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-22 15:50:26,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-22 15:50:26,052 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-10-22 15:50:26,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:26,053 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-22 15:50:26,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:50:26,053 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-22 15:50:26,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-22 15:50:26,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:26,054 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:26,055 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:26,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:26,055 INFO L82 PathProgramCache]: Analyzing trace with hash 382249806, now seen corresponding path program 1 times [2018-10-22 15:50:26,055 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:26,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:26,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:26,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:26,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:26,139 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 15:50:26,139 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:50:26,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 15:50:26,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:50:26,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:50:26,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:50:26,141 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2018-10-22 15:50:26,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:26,213 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2018-10-22 15:50:26,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:50:26,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-10-22 15:50:26,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:26,215 INFO L225 Difference]: With dead ends: 22 [2018-10-22 15:50:26,215 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 15:50:26,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:50:26,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 15:50:26,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-22 15:50:26,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 15:50:26,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-10-22 15:50:26,223 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 9 [2018-10-22 15:50:26,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:26,223 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-10-22 15:50:26,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:50:26,223 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-10-22 15:50:26,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-22 15:50:26,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:26,224 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:26,225 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:26,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:26,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1431289974, now seen corresponding path program 1 times [2018-10-22 15:50:26,226 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:26,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:26,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:26,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:26,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-22 15:50:26,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:26,294 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 15:50:26,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:26,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-22 15:50:26,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:26,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-22 15:50:26,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:50:26,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:50:26,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:50:26,392 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2018-10-22 15:50:26,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:26,470 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2018-10-22 15:50:26,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:50:26,470 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-10-22 15:50:26,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:26,471 INFO L225 Difference]: With dead ends: 36 [2018-10-22 15:50:26,471 INFO L226 Difference]: Without dead ends: 23 [2018-10-22 15:50:26,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:50:26,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-22 15:50:26,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2018-10-22 15:50:26,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-22 15:50:26,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-22 15:50:26,478 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2018-10-22 15:50:26,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:26,478 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-22 15:50:26,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:50:26,478 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-22 15:50:26,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 15:50:26,479 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:26,479 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:26,480 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:26,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:26,480 INFO L82 PathProgramCache]: Analyzing trace with hash 709320456, now seen corresponding path program 2 times [2018-10-22 15:50:26,480 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:26,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:26,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:26,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:26,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-22 15:50:26,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:26,566 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 15:50:26,583 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:26,627 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:26,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:26,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-22 15:50:26,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:26,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-22 15:50:26,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:50:26,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:50:26,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:50:26,668 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2018-10-22 15:50:26,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:26,811 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2018-10-22 15:50:26,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:50:26,813 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-10-22 15:50:26,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:26,813 INFO L225 Difference]: With dead ends: 40 [2018-10-22 15:50:26,814 INFO L226 Difference]: Without dead ends: 27 [2018-10-22 15:50:26,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 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 15:50:26,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-22 15:50:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-10-22 15:50:26,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-22 15:50:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-10-22 15:50:26,824 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2018-10-22 15:50:26,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:26,824 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-10-22 15:50:26,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:50:26,824 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-10-22 15:50:26,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-22 15:50:26,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:26,826 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:26,826 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:26,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:26,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1716085914, now seen corresponding path program 3 times [2018-10-22 15:50:26,829 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:26,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:26,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:26,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:26,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-22 15:50:27,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:27,015 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 15:50:27,026 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:27,059 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-22 15:50:27,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:27,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-22 15:50:27,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:27,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-22 15:50:27,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:50:27,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:50:27,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:50:27,095 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 6 states. [2018-10-22 15:50:27,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:27,193 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2018-10-22 15:50:27,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:50:27,194 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-10-22 15:50:27,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:27,195 INFO L225 Difference]: With dead ends: 44 [2018-10-22 15:50:27,195 INFO L226 Difference]: Without dead ends: 31 [2018-10-22 15:50:27,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:50:27,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-22 15:50:27,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2018-10-22 15:50:27,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-22 15:50:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-10-22 15:50:27,201 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2018-10-22 15:50:27,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:27,202 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-10-22 15:50:27,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:50:27,202 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-10-22 15:50:27,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-22 15:50:27,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:27,203 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:27,203 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:27,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:27,204 INFO L82 PathProgramCache]: Analyzing trace with hash 533352748, now seen corresponding path program 4 times [2018-10-22 15:50:27,204 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:27,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:27,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:27,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:27,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 23 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-22 15:50:27,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:27,335 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 15:50:27,350 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:27,364 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:27,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:27,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 23 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-22 15:50:27,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:27,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-22 15:50:27,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:50:27,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:50:27,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:50:27,400 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 7 states. [2018-10-22 15:50:27,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:27,544 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2018-10-22 15:50:27,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:50:27,545 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2018-10-22 15:50:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:27,546 INFO L225 Difference]: With dead ends: 48 [2018-10-22 15:50:27,547 INFO L226 Difference]: Without dead ends: 35 [2018-10-22 15:50:27,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:50:27,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-22 15:50:27,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2018-10-22 15:50:27,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-22 15:50:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-22 15:50:27,553 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2018-10-22 15:50:27,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:27,553 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-22 15:50:27,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:50:27,554 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-22 15:50:27,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-22 15:50:27,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:27,555 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:27,555 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:27,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:27,556 INFO L82 PathProgramCache]: Analyzing trace with hash 520004798, now seen corresponding path program 5 times [2018-10-22 15:50:27,556 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:27,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:27,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:27,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:27,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-22 15:50:27,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:27,668 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 15:50:27,678 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:27,712 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-22 15:50:27,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:27,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-22 15:50:27,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:27,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-22 15:50:27,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:50:27,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:50:27,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:50:27,755 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 8 states. [2018-10-22 15:50:27,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:27,873 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2018-10-22 15:50:27,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:50:27,875 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2018-10-22 15:50:27,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:27,876 INFO L225 Difference]: With dead ends: 52 [2018-10-22 15:50:27,876 INFO L226 Difference]: Without dead ends: 39 [2018-10-22 15:50:27,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:50:27,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-22 15:50:27,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-10-22 15:50:27,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-22 15:50:27,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-22 15:50:27,890 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 33 [2018-10-22 15:50:27,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:27,890 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-22 15:50:27,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:50:27,891 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-22 15:50:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-22 15:50:27,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:27,893 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:27,893 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:27,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:27,896 INFO L82 PathProgramCache]: Analyzing trace with hash -35987632, now seen corresponding path program 6 times [2018-10-22 15:50:27,896 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:27,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:27,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:27,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:27,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 33 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-22 15:50:28,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:28,456 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 15:50:28,464 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:28,485 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-22 15:50:28,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:28,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 100 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-22 15:50:28,684 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:28,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-10-22 15:50:28,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:50:28,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:50:28,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:50:28,685 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 16 states. [2018-10-22 15:50:29,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:29,097 INFO L93 Difference]: Finished difference Result 101 states and 121 transitions. [2018-10-22 15:50:29,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:50:29,100 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2018-10-22 15:50:29,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:29,101 INFO L225 Difference]: With dead ends: 101 [2018-10-22 15:50:29,102 INFO L226 Difference]: Without dead ends: 88 [2018-10-22 15:50:29,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=593, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:50:29,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-22 15:50:29,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2018-10-22 15:50:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-22 15:50:29,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-10-22 15:50:29,121 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 37 [2018-10-22 15:50:29,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:29,124 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-10-22 15:50:29,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:50:29,124 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-10-22 15:50:29,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-22 15:50:29,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:29,128 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:29,128 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:29,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:29,129 INFO L82 PathProgramCache]: Analyzing trace with hash -330151738, now seen corresponding path program 7 times [2018-10-22 15:50:29,129 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:29,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:29,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:29,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:29,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 193 proven. 105 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-10-22 15:50:29,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:29,516 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 15:50:29,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:29,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 193 proven. 105 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-10-22 15:50:29,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:29,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-22 15:50:29,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:50:29,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:50:29,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:50:29,593 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 10 states. [2018-10-22 15:50:29,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:29,680 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2018-10-22 15:50:29,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:50:29,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2018-10-22 15:50:29,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:29,684 INFO L225 Difference]: With dead ends: 100 [2018-10-22 15:50:29,685 INFO L226 Difference]: Without dead ends: 67 [2018-10-22 15:50:29,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:50:29,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-22 15:50:29,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2018-10-22 15:50:29,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-22 15:50:29,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2018-10-22 15:50:29,695 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 61 [2018-10-22 15:50:29,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:29,696 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2018-10-22 15:50:29,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:50:29,696 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2018-10-22 15:50:29,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-22 15:50:29,697 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:29,697 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 8, 7, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:29,698 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:29,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:29,698 INFO L82 PathProgramCache]: Analyzing trace with hash -763112360, now seen corresponding path program 8 times [2018-10-22 15:50:29,698 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:29,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:29,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:29,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:29,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 218 proven. 136 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-10-22 15:50:29,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:29,936 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 15:50:29,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:29,969 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:29,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:29,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 218 proven. 136 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-10-22 15:50:30,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:30,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-22 15:50:30,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:50:30,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:50:30,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:50:30,013 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 11 states. [2018-10-22 15:50:30,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:30,084 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2018-10-22 15:50:30,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:50:30,084 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2018-10-22 15:50:30,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:30,086 INFO L225 Difference]: With dead ends: 104 [2018-10-22 15:50:30,086 INFO L226 Difference]: Without dead ends: 71 [2018-10-22 15:50:30,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:50:30,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-22 15:50:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2018-10-22 15:50:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-22 15:50:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2018-10-22 15:50:30,094 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 65 [2018-10-22 15:50:30,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:30,095 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2018-10-22 15:50:30,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:50:30,095 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2018-10-22 15:50:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-22 15:50:30,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:30,096 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 9, 7, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:30,097 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:30,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:30,097 INFO L82 PathProgramCache]: Analyzing trace with hash -419346710, now seen corresponding path program 9 times [2018-10-22 15:50:30,097 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:30,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:30,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:30,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:30,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 243 proven. 171 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-10-22 15:50:30,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:30,252 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 15:50:30,261 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:30,485 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-22 15:50:30,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:30,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 298 proven. 157 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-10-22 15:50:30,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:30,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-10-22 15:50:30,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:50:30,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:50:30,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:50:30,743 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 22 states. [2018-10-22 15:50:31,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:31,197 INFO L93 Difference]: Finished difference Result 195 states and 234 transitions. [2018-10-22 15:50:31,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 15:50:31,197 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 69 [2018-10-22 15:50:31,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:31,199 INFO L225 Difference]: With dead ends: 195 [2018-10-22 15:50:31,199 INFO L226 Difference]: Without dead ends: 162 [2018-10-22 15:50:31,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=1235, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:50:31,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-22 15:50:31,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 86. [2018-10-22 15:50:31,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-22 15:50:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2018-10-22 15:50:31,212 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 69 [2018-10-22 15:50:31,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:31,213 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2018-10-22 15:50:31,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:50:31,213 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2018-10-22 15:50:31,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-22 15:50:31,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:31,214 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:31,215 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:31,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:31,215 INFO L82 PathProgramCache]: Analyzing trace with hash 277318712, now seen corresponding path program 10 times [2018-10-22 15:50:31,215 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:31,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:31,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:31,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:31,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 397 proven. 210 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-22 15:50:31,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:31,371 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:50:31,393 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:31,422 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:31,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:31,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 397 proven. 210 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-22 15:50:31,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:31,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-22 15:50:31,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:50:31,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:50:31,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:50:31,477 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 13 states. [2018-10-22 15:50:31,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:31,556 INFO L93 Difference]: Finished difference Result 136 states and 157 transitions. [2018-10-22 15:50:31,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:50:31,557 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2018-10-22 15:50:31,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:31,559 INFO L225 Difference]: With dead ends: 136 [2018-10-22 15:50:31,559 INFO L226 Difference]: Without dead ends: 91 [2018-10-22 15:50:31,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:50:31,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-22 15:50:31,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2018-10-22 15:50:31,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-22 15:50:31,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2018-10-22 15:50:31,570 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 85 [2018-10-22 15:50:31,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:31,570 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2018-10-22 15:50:31,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:50:31,570 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2018-10-22 15:50:31,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-22 15:50:31,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:31,571 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 11, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:31,572 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:31,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:31,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1360265674, now seen corresponding path program 11 times [2018-10-22 15:50:31,572 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:31,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:31,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:31,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:31,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 434 proven. 253 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-22 15:50:32,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:32,361 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 15:50:32,371 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:32,428 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2018-10-22 15:50:32,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:32,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 434 proven. 253 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-22 15:50:32,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:32,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-22 15:50:32,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:50:32,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:50:32,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:50:32,490 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand 14 states. [2018-10-22 15:50:32,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:32,605 INFO L93 Difference]: Finished difference Result 140 states and 161 transitions. [2018-10-22 15:50:32,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:50:32,605 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2018-10-22 15:50:32,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:32,606 INFO L225 Difference]: With dead ends: 140 [2018-10-22 15:50:32,607 INFO L226 Difference]: Without dead ends: 95 [2018-10-22 15:50:32,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:50:32,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-22 15:50:32,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2018-10-22 15:50:32,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-22 15:50:32,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2018-10-22 15:50:32,617 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 89 [2018-10-22 15:50:32,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:32,618 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2018-10-22 15:50:32,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:50:32,618 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2018-10-22 15:50:32,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-22 15:50:32,619 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:32,619 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 12, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:32,620 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:32,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:32,620 INFO L82 PathProgramCache]: Analyzing trace with hash -462987684, now seen corresponding path program 12 times [2018-10-22 15:50:32,620 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:32,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:32,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:32,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:32,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 471 proven. 300 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-22 15:50:33,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:33,045 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 15:50:33,053 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:33,092 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-22 15:50:33,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:33,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:33,119 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 471 proven. 300 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-22 15:50:33,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:33,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-22 15:50:33,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:50:33,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:50:33,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:50:33,163 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 15 states. [2018-10-22 15:50:33,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:33,324 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2018-10-22 15:50:33,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:50:33,325 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 93 [2018-10-22 15:50:33,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:33,325 INFO L225 Difference]: With dead ends: 144 [2018-10-22 15:50:33,325 INFO L226 Difference]: Without dead ends: 99 [2018-10-22 15:50:33,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:50:33,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-22 15:50:33,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2018-10-22 15:50:33,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-22 15:50:33,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2018-10-22 15:50:33,337 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 93 [2018-10-22 15:50:33,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:33,337 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2018-10-22 15:50:33,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:50:33,337 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2018-10-22 15:50:33,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-22 15:50:33,338 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:33,339 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 13, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:33,339 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:33,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:33,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1363795474, now seen corresponding path program 13 times [2018-10-22 15:50:33,339 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:33,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:33,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:33,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:33,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 508 proven. 351 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-22 15:50:33,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:33,501 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 15:50:33,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:33,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 508 proven. 351 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-22 15:50:33,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:33,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-22 15:50:33,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:50:33,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:50:33,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:50:33,601 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 16 states. [2018-10-22 15:50:33,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:33,688 INFO L93 Difference]: Finished difference Result 148 states and 169 transitions. [2018-10-22 15:50:33,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:50:33,689 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2018-10-22 15:50:33,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:33,690 INFO L225 Difference]: With dead ends: 148 [2018-10-22 15:50:33,690 INFO L226 Difference]: Without dead ends: 103 [2018-10-22 15:50:33,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:50:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-22 15:50:33,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2018-10-22 15:50:33,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-22 15:50:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2018-10-22 15:50:33,699 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 97 [2018-10-22 15:50:33,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:33,699 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2018-10-22 15:50:33,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:50:33,699 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2018-10-22 15:50:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-22 15:50:33,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:33,701 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 14, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:33,701 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:33,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:33,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1710541952, now seen corresponding path program 14 times [2018-10-22 15:50:33,702 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:33,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:33,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:33,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:33,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 545 proven. 406 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-22 15:50:33,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:33,955 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 15:50:33,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:34,006 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:34,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:34,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 545 proven. 406 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-22 15:50:34,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:34,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-22 15:50:34,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:50:34,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:50:34,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:50:34,056 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand 17 states. [2018-10-22 15:50:34,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:34,234 INFO L93 Difference]: Finished difference Result 152 states and 173 transitions. [2018-10-22 15:50:34,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:50:34,234 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 101 [2018-10-22 15:50:34,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:34,235 INFO L225 Difference]: With dead ends: 152 [2018-10-22 15:50:34,235 INFO L226 Difference]: Without dead ends: 107 [2018-10-22 15:50:34,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:50:34,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-22 15:50:34,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2018-10-22 15:50:34,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-22 15:50:34,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2018-10-22 15:50:34,242 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 101 [2018-10-22 15:50:34,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:34,242 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2018-10-22 15:50:34,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:50:34,243 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2018-10-22 15:50:34,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-22 15:50:34,243 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:34,244 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 15, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:34,244 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:34,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:34,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1311252974, now seen corresponding path program 15 times [2018-10-22 15:50:34,244 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:34,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:34,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:34,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:34,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 582 proven. 465 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-22 15:50:34,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:34,567 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 15:50:34,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:34,689 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-22 15:50:34,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:34,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 582 proven. 465 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-22 15:50:34,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:34,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-22 15:50:34,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:50:34,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:50:34,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:50:34,740 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand 18 states. [2018-10-22 15:50:34,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:34,880 INFO L93 Difference]: Finished difference Result 156 states and 177 transitions. [2018-10-22 15:50:34,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:50:34,881 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 105 [2018-10-22 15:50:34,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:34,882 INFO L225 Difference]: With dead ends: 156 [2018-10-22 15:50:34,882 INFO L226 Difference]: Without dead ends: 111 [2018-10-22 15:50:34,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:50:34,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-22 15:50:34,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2018-10-22 15:50:34,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-22 15:50:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2018-10-22 15:50:34,888 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 105 [2018-10-22 15:50:34,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:34,888 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2018-10-22 15:50:34,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:50:34,889 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2018-10-22 15:50:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-22 15:50:34,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:34,890 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 16, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:34,890 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:34,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:34,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1272174244, now seen corresponding path program 16 times [2018-10-22 15:50:34,891 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:34,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:34,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:34,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:34,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 619 proven. 528 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-22 15:50:35,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:35,188 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 15:50:35,198 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:35,230 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:35,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:35,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 619 proven. 528 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-22 15:50:35,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:35,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-22 15:50:35,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:50:35,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:50:35,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:50:35,286 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand 19 states. [2018-10-22 15:50:35,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:35,474 INFO L93 Difference]: Finished difference Result 160 states and 181 transitions. [2018-10-22 15:50:35,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-22 15:50:35,474 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 109 [2018-10-22 15:50:35,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:35,475 INFO L225 Difference]: With dead ends: 160 [2018-10-22 15:50:35,475 INFO L226 Difference]: Without dead ends: 115 [2018-10-22 15:50:35,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:50:35,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-22 15:50:35,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2018-10-22 15:50:35,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-22 15:50:35,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2018-10-22 15:50:35,482 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 109 [2018-10-22 15:50:35,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:35,482 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2018-10-22 15:50:35,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:50:35,483 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2018-10-22 15:50:35,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-22 15:50:35,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:35,484 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 17, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:35,484 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:35,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:35,484 INFO L82 PathProgramCache]: Analyzing trace with hash 522008118, now seen corresponding path program 17 times [2018-10-22 15:50:35,484 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:35,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:35,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:35,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:35,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 656 proven. 595 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-22 15:50:35,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:35,850 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 15:50:35,862 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:35,910 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2018-10-22 15:50:35,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:35,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 656 proven. 595 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-22 15:50:35,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:35,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-22 15:50:35,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:50:35,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:50:35,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:50:35,954 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand 20 states. [2018-10-22 15:50:36,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:36,133 INFO L93 Difference]: Finished difference Result 164 states and 185 transitions. [2018-10-22 15:50:36,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:50:36,133 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 113 [2018-10-22 15:50:36,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:36,135 INFO L225 Difference]: With dead ends: 164 [2018-10-22 15:50:36,135 INFO L226 Difference]: Without dead ends: 119 [2018-10-22 15:50:36,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:50:36,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-22 15:50:36,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2018-10-22 15:50:36,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-22 15:50:36,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2018-10-22 15:50:36,142 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 113 [2018-10-22 15:50:36,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:36,142 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2018-10-22 15:50:36,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:50:36,143 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2018-10-22 15:50:36,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-22 15:50:36,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:36,144 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 18, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:36,144 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:36,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:36,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1755872456, now seen corresponding path program 18 times [2018-10-22 15:50:36,145 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:36,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:36,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:36,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:36,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 693 proven. 666 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-22 15:50:36,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:36,441 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 15:50:36,449 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:36,492 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-22 15:50:36,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:36,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 1132 proven. 343 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-10-22 15:50:37,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:37,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2018-10-22 15:50:37,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:50:37,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:50:37,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:50:37,098 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand 40 states. [2018-10-22 15:50:38,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:38,155 INFO L93 Difference]: Finished difference Result 537 states and 657 transitions. [2018-10-22 15:50:38,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-22 15:50:38,156 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 117 [2018-10-22 15:50:38,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:38,158 INFO L225 Difference]: With dead ends: 537 [2018-10-22 15:50:38,158 INFO L226 Difference]: Without dead ends: 492 [2018-10-22 15:50:38,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1287, Invalid=4565, Unknown=0, NotChecked=0, Total=5852 [2018-10-22 15:50:38,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2018-10-22 15:50:38,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 158. [2018-10-22 15:50:38,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-22 15:50:38,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 177 transitions. [2018-10-22 15:50:38,178 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 177 transitions. Word has length 117 [2018-10-22 15:50:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:38,178 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 177 transitions. [2018-10-22 15:50:38,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:50:38,179 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 177 transitions. [2018-10-22 15:50:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-22 15:50:38,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:38,180 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:38,180 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:38,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:38,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1034671986, now seen corresponding path program 19 times [2018-10-22 15:50:38,180 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:38,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:38,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:38,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:38,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1441 proven. 741 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2018-10-22 15:50:38,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:38,491 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 15:50:38,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:38,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1441 proven. 741 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2018-10-22 15:50:38,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:38,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-22 15:50:38,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:50:38,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:50:38,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:50:38,609 INFO L87 Difference]: Start difference. First operand 158 states and 177 transitions. Second operand 22 states. [2018-10-22 15:50:38,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:38,716 INFO L93 Difference]: Finished difference Result 244 states and 283 transitions. [2018-10-22 15:50:38,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:50:38,717 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 157 [2018-10-22 15:50:38,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:38,718 INFO L225 Difference]: With dead ends: 244 [2018-10-22 15:50:38,718 INFO L226 Difference]: Without dead ends: 163 [2018-10-22 15:50:38,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:50:38,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-22 15:50:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2018-10-22 15:50:38,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-22 15:50:38,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 181 transitions. [2018-10-22 15:50:38,735 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 181 transitions. Word has length 157 [2018-10-22 15:50:38,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:38,735 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 181 transitions. [2018-10-22 15:50:38,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:50:38,736 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 181 transitions. [2018-10-22 15:50:38,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-22 15:50:38,736 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:38,737 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 20, 19, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:38,737 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:38,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:38,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1279089696, now seen corresponding path program 20 times [2018-10-22 15:50:38,737 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:38,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:38,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:38,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:38,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1514 proven. 820 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2018-10-22 15:50:39,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:39,705 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 15:50:39,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:39,756 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:39,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:39,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1514 proven. 820 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2018-10-22 15:50:39,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:39,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-22 15:50:39,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:50:39,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:50:39,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:50:39,807 INFO L87 Difference]: Start difference. First operand 162 states and 181 transitions. Second operand 23 states. [2018-10-22 15:50:39,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:39,968 INFO L93 Difference]: Finished difference Result 248 states and 287 transitions. [2018-10-22 15:50:39,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:50:39,968 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 161 [2018-10-22 15:50:39,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:39,969 INFO L225 Difference]: With dead ends: 248 [2018-10-22 15:50:39,969 INFO L226 Difference]: Without dead ends: 167 [2018-10-22 15:50:39,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:50:39,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-22 15:50:39,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2018-10-22 15:50:39,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-22 15:50:39,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 185 transitions. [2018-10-22 15:50:39,985 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 185 transitions. Word has length 161 [2018-10-22 15:50:39,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:39,985 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 185 transitions. [2018-10-22 15:50:39,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:50:39,986 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 185 transitions. [2018-10-22 15:50:39,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-22 15:50:39,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:39,987 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 21, 19, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:39,987 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:39,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:39,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1872857422, now seen corresponding path program 21 times [2018-10-22 15:50:39,988 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:39,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:39,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:39,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:39,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1587 proven. 903 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2018-10-22 15:50:40,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:40,421 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:50:40,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:40,498 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-22 15:50:40,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:40,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1714 proven. 1333 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-10-22 15:50:41,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:41,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2018-10-22 15:50:41,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-22 15:50:41,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-22 15:50:41,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:50:41,364 INFO L87 Difference]: Start difference. First operand 166 states and 185 transitions. Second operand 46 states. [2018-10-22 15:50:42,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:42,597 INFO L93 Difference]: Finished difference Result 483 states and 582 transitions. [2018-10-22 15:50:42,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-22 15:50:42,604 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 165 [2018-10-22 15:50:42,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:42,606 INFO L225 Difference]: With dead ends: 483 [2018-10-22 15:50:42,606 INFO L226 Difference]: Without dead ends: 402 [2018-10-22 15:50:42,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1689, Invalid=6143, Unknown=0, NotChecked=0, Total=7832 [2018-10-22 15:50:42,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2018-10-22 15:50:42,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 182. [2018-10-22 15:50:42,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-22 15:50:42,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 204 transitions. [2018-10-22 15:50:42,638 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 204 transitions. Word has length 165 [2018-10-22 15:50:42,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:42,638 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 204 transitions. [2018-10-22 15:50:42,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-22 15:50:42,639 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 204 transitions. [2018-10-22 15:50:42,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-22 15:50:42,640 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:42,640 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:42,640 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:42,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:42,640 INFO L82 PathProgramCache]: Analyzing trace with hash -28903424, now seen corresponding path program 22 times [2018-10-22 15:50:42,641 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:42,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:42,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:42,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:42,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1933 proven. 990 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:44,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:44,215 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 15:50:44,224 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:44,279 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:44,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:44,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1933 proven. 990 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:44,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:44,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-22 15:50:44,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:50:44,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:50:44,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:50:44,350 INFO L87 Difference]: Start difference. First operand 182 states and 204 transitions. Second operand 25 states. [2018-10-22 15:50:44,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:44,543 INFO L93 Difference]: Finished difference Result 280 states and 325 transitions. [2018-10-22 15:50:44,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-22 15:50:44,543 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 181 [2018-10-22 15:50:44,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:44,545 INFO L225 Difference]: With dead ends: 280 [2018-10-22 15:50:44,545 INFO L226 Difference]: Without dead ends: 187 [2018-10-22 15:50:44,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:50:44,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-22 15:50:44,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2018-10-22 15:50:44,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-10-22 15:50:44,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 208 transitions. [2018-10-22 15:50:44,567 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 208 transitions. Word has length 181 [2018-10-22 15:50:44,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:44,568 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 208 transitions. [2018-10-22 15:50:44,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:50:44,568 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 208 transitions. [2018-10-22 15:50:44,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-10-22 15:50:44,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:44,568 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 23, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:44,569 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:44,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:44,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1609362030, now seen corresponding path program 23 times [2018-10-22 15:50:44,569 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:44,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:44,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:44,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:44,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2018 proven. 1081 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:45,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:45,144 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 15:50:45,158 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:45,234 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 45 check-sat command(s) [2018-10-22 15:50:45,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:45,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2018 proven. 1081 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:45,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:45,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-22 15:50:45,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-22 15:50:45,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-22 15:50:45,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:50:45,304 INFO L87 Difference]: Start difference. First operand 186 states and 208 transitions. Second operand 26 states. [2018-10-22 15:50:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:45,474 INFO L93 Difference]: Finished difference Result 284 states and 329 transitions. [2018-10-22 15:50:45,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:50:45,474 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 185 [2018-10-22 15:50:45,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:45,476 INFO L225 Difference]: With dead ends: 284 [2018-10-22 15:50:45,476 INFO L226 Difference]: Without dead ends: 191 [2018-10-22 15:50:45,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:50:45,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-22 15:50:45,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2018-10-22 15:50:45,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-10-22 15:50:45,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 212 transitions. [2018-10-22 15:50:45,498 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 212 transitions. Word has length 185 [2018-10-22 15:50:45,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:45,499 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 212 transitions. [2018-10-22 15:50:45,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-22 15:50:45,499 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 212 transitions. [2018-10-22 15:50:45,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-10-22 15:50:45,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:45,500 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 24, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:45,500 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:45,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:45,501 INFO L82 PathProgramCache]: Analyzing trace with hash 479336996, now seen corresponding path program 24 times [2018-10-22 15:50:45,501 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:45,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:45,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:45,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:45,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2103 proven. 1176 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:46,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:46,810 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 15:50:46,820 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:46,888 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-10-22 15:50:46,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:46,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2103 proven. 1176 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:46,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:46,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-22 15:50:46,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 15:50:46,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 15:50:46,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:50:46,939 INFO L87 Difference]: Start difference. First operand 190 states and 212 transitions. Second operand 27 states. [2018-10-22 15:50:47,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:47,400 INFO L93 Difference]: Finished difference Result 288 states and 333 transitions. [2018-10-22 15:50:47,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 15:50:47,401 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 189 [2018-10-22 15:50:47,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:47,402 INFO L225 Difference]: With dead ends: 288 [2018-10-22 15:50:47,402 INFO L226 Difference]: Without dead ends: 195 [2018-10-22 15:50:47,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:50:47,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-22 15:50:47,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2018-10-22 15:50:47,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-22 15:50:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 216 transitions. [2018-10-22 15:50:47,428 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 216 transitions. Word has length 189 [2018-10-22 15:50:47,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:47,428 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 216 transitions. [2018-10-22 15:50:47,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 15:50:47,429 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 216 transitions. [2018-10-22 15:50:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-22 15:50:47,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:47,430 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 25, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:47,430 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:47,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:47,431 INFO L82 PathProgramCache]: Analyzing trace with hash -2114419274, now seen corresponding path program 25 times [2018-10-22 15:50:47,432 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:47,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:47,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:47,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:47,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2188 proven. 1275 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:49,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:49,662 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 15:50:49,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:49,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2188 proven. 1275 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:49,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:49,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-22 15:50:49,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:50:49,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:50:49,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:50:49,778 INFO L87 Difference]: Start difference. First operand 194 states and 216 transitions. Second operand 28 states. [2018-10-22 15:50:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:49,955 INFO L93 Difference]: Finished difference Result 292 states and 337 transitions. [2018-10-22 15:50:49,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 15:50:49,956 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 193 [2018-10-22 15:50:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:49,958 INFO L225 Difference]: With dead ends: 292 [2018-10-22 15:50:49,958 INFO L226 Difference]: Without dead ends: 199 [2018-10-22 15:50:49,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:50:49,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-22 15:50:49,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2018-10-22 15:50:49,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-10-22 15:50:49,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 220 transitions. [2018-10-22 15:50:49,982 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 220 transitions. Word has length 193 [2018-10-22 15:50:49,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:49,982 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 220 transitions. [2018-10-22 15:50:49,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:50:49,982 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 220 transitions. [2018-10-22 15:50:49,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-22 15:50:49,983 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:49,983 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 26, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:49,983 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:49,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:49,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1338320824, now seen corresponding path program 26 times [2018-10-22 15:50:49,984 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:49,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:49,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:49,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:49,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2273 proven. 1378 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:50,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:50,592 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 15:50:50,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:50,675 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:50,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:50,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2273 proven. 1378 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:50,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:50,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-22 15:50:50,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:50:50,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:50:50,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:50:50,769 INFO L87 Difference]: Start difference. First operand 198 states and 220 transitions. Second operand 29 states. [2018-10-22 15:50:51,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:51,047 INFO L93 Difference]: Finished difference Result 296 states and 341 transitions. [2018-10-22 15:50:51,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:50:51,047 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 197 [2018-10-22 15:50:51,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:51,049 INFO L225 Difference]: With dead ends: 296 [2018-10-22 15:50:51,049 INFO L226 Difference]: Without dead ends: 203 [2018-10-22 15:50:51,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:50:51,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-22 15:50:51,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2018-10-22 15:50:51,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-10-22 15:50:51,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 224 transitions. [2018-10-22 15:50:51,070 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 224 transitions. Word has length 197 [2018-10-22 15:50:51,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:51,071 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 224 transitions. [2018-10-22 15:50:51,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:50:51,071 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 224 transitions. [2018-10-22 15:50:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-10-22 15:50:51,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:51,072 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 27, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:51,072 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:51,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:51,072 INFO L82 PathProgramCache]: Analyzing trace with hash 2030932442, now seen corresponding path program 27 times [2018-10-22 15:50:51,072 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:51,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:51,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:51,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:51,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2358 proven. 1485 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:51,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:51,602 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 15:50:51,611 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:51,703 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 49 check-sat command(s) [2018-10-22 15:50:51,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:51,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2358 proven. 1485 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:51,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:51,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-22 15:50:51,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-22 15:50:51,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-22 15:50:51,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:50:51,762 INFO L87 Difference]: Start difference. First operand 202 states and 224 transitions. Second operand 30 states. [2018-10-22 15:50:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:51,867 INFO L93 Difference]: Finished difference Result 300 states and 345 transitions. [2018-10-22 15:50:51,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 15:50:51,867 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 201 [2018-10-22 15:50:51,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:51,868 INFO L225 Difference]: With dead ends: 300 [2018-10-22 15:50:51,868 INFO L226 Difference]: Without dead ends: 207 [2018-10-22 15:50:51,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:50:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-22 15:50:51,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2018-10-22 15:50:51,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-10-22 15:50:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 228 transitions. [2018-10-22 15:50:51,889 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 228 transitions. Word has length 201 [2018-10-22 15:50:51,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:51,890 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 228 transitions. [2018-10-22 15:50:51,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-22 15:50:51,890 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 228 transitions. [2018-10-22 15:50:51,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-10-22 15:50:51,891 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:51,891 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 28, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:51,891 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:51,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:51,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1075498388, now seen corresponding path program 28 times [2018-10-22 15:50:51,892 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:51,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:51,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:51,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:51,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2443 proven. 1596 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:52,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:52,677 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 15:50:52,693 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:52,765 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:52,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:52,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2443 proven. 1596 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:52,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:52,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-22 15:50:52,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:50:52,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:50:52,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:50:52,838 INFO L87 Difference]: Start difference. First operand 206 states and 228 transitions. Second operand 31 states. [2018-10-22 15:50:53,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:53,207 INFO L93 Difference]: Finished difference Result 304 states and 349 transitions. [2018-10-22 15:50:53,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 15:50:53,208 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 205 [2018-10-22 15:50:53,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:53,209 INFO L225 Difference]: With dead ends: 304 [2018-10-22 15:50:53,209 INFO L226 Difference]: Without dead ends: 211 [2018-10-22 15:50:53,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:50:53,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-22 15:50:53,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2018-10-22 15:50:53,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-10-22 15:50:53,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 232 transitions. [2018-10-22 15:50:53,229 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 232 transitions. Word has length 205 [2018-10-22 15:50:53,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:53,229 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 232 transitions. [2018-10-22 15:50:53,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:50:53,229 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 232 transitions. [2018-10-22 15:50:53,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-22 15:50:53,230 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:53,230 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 29, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:53,230 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:53,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:53,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1711916546, now seen corresponding path program 29 times [2018-10-22 15:50:53,231 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:53,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:53,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:53,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:53,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2528 proven. 1711 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:53,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:53,724 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 15:50:53,738 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:53,886 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2018-10-22 15:50:53,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:53,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2528 proven. 1711 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:53,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:53,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-22 15:50:53,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-22 15:50:53,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-22 15:50:53,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:50:53,949 INFO L87 Difference]: Start difference. First operand 210 states and 232 transitions. Second operand 32 states. [2018-10-22 15:50:54,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:54,101 INFO L93 Difference]: Finished difference Result 308 states and 353 transitions. [2018-10-22 15:50:54,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 15:50:54,101 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 209 [2018-10-22 15:50:54,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:54,103 INFO L225 Difference]: With dead ends: 308 [2018-10-22 15:50:54,103 INFO L226 Difference]: Without dead ends: 215 [2018-10-22 15:50:54,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:50:54,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-10-22 15:50:54,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2018-10-22 15:50:54,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-10-22 15:50:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 236 transitions. [2018-10-22 15:50:54,122 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 236 transitions. Word has length 209 [2018-10-22 15:50:54,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:54,122 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 236 transitions. [2018-10-22 15:50:54,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-22 15:50:54,122 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 236 transitions. [2018-10-22 15:50:54,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-22 15:50:54,123 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:54,123 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 30, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:54,123 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:54,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:54,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1848977552, now seen corresponding path program 30 times [2018-10-22 15:50:54,124 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:54,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:54,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:54,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:54,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 2613 proven. 1830 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:54,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:54,825 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 15:50:54,833 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:54,912 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-22 15:50:54,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:54,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:54,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 2613 proven. 1830 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:54,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:54,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-22 15:50:54,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:50:54,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:50:54,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:50:54,992 INFO L87 Difference]: Start difference. First operand 214 states and 236 transitions. Second operand 33 states. [2018-10-22 15:50:56,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:56,037 INFO L93 Difference]: Finished difference Result 312 states and 357 transitions. [2018-10-22 15:50:56,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-22 15:50:56,037 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 213 [2018-10-22 15:50:56,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:56,039 INFO L225 Difference]: With dead ends: 312 [2018-10-22 15:50:56,039 INFO L226 Difference]: Without dead ends: 219 [2018-10-22 15:50:56,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:50:56,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-22 15:50:56,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2018-10-22 15:50:56,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-10-22 15:50:56,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 240 transitions. [2018-10-22 15:50:56,066 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 240 transitions. Word has length 213 [2018-10-22 15:50:56,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:56,066 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 240 transitions. [2018-10-22 15:50:56,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 15:50:56,066 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 240 transitions. [2018-10-22 15:50:56,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-22 15:50:56,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:56,067 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 31, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:56,068 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:56,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:56,068 INFO L82 PathProgramCache]: Analyzing trace with hash 357989922, now seen corresponding path program 31 times [2018-10-22 15:50:56,068 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:56,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:56,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:56,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:56,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 2698 proven. 1953 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:56,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:56,721 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 15:50:56,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:56,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 2698 proven. 1953 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:56,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:56,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-22 15:50:56,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-22 15:50:56,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-22 15:50:56,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:50:56,879 INFO L87 Difference]: Start difference. First operand 218 states and 240 transitions. Second operand 34 states. [2018-10-22 15:50:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:57,070 INFO L93 Difference]: Finished difference Result 316 states and 361 transitions. [2018-10-22 15:50:57,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-22 15:50:57,071 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 217 [2018-10-22 15:50:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:57,072 INFO L225 Difference]: With dead ends: 316 [2018-10-22 15:50:57,072 INFO L226 Difference]: Without dead ends: 223 [2018-10-22 15:50:57,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:50:57,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-22 15:50:57,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2018-10-22 15:50:57,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-10-22 15:50:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 244 transitions. [2018-10-22 15:50:57,097 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 244 transitions. Word has length 217 [2018-10-22 15:50:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:57,097 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 244 transitions. [2018-10-22 15:50:57,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-22 15:50:57,097 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 244 transitions. [2018-10-22 15:50:57,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-22 15:50:57,098 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:57,098 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 32, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:57,099 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:57,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:57,099 INFO L82 PathProgramCache]: Analyzing trace with hash -103892300, now seen corresponding path program 32 times [2018-10-22 15:50:57,099 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:57,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:57,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:57,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:57,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2783 proven. 2080 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:58,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:58,592 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 15:50:58,599 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:58,660 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:58,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:58,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2783 proven. 2080 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:50:58,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:58,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-22 15:50:58,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:50:58,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:50:58,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:50:58,726 INFO L87 Difference]: Start difference. First operand 222 states and 244 transitions. Second operand 35 states. [2018-10-22 15:50:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:58,891 INFO L93 Difference]: Finished difference Result 320 states and 365 transitions. [2018-10-22 15:50:58,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 15:50:58,892 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 221 [2018-10-22 15:50:58,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:58,893 INFO L225 Difference]: With dead ends: 320 [2018-10-22 15:50:58,894 INFO L226 Difference]: Without dead ends: 227 [2018-10-22 15:50:58,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:50:58,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-22 15:50:58,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2018-10-22 15:50:58,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-10-22 15:50:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 248 transitions. [2018-10-22 15:50:58,916 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 248 transitions. Word has length 221 [2018-10-22 15:50:58,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:58,917 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 248 transitions. [2018-10-22 15:50:58,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:50:58,917 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 248 transitions. [2018-10-22 15:50:58,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-10-22 15:50:58,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:58,918 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 33, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:58,918 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:58,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:58,918 INFO L82 PathProgramCache]: Analyzing trace with hash 936533574, now seen corresponding path program 33 times [2018-10-22 15:50:58,918 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:58,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:58,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:58,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:58,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 2868 proven. 2211 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-10-22 15:51:01,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:01,216 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 15:51:01,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:01,314 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 55 check-sat command(s) [2018-10-22 15:51:01,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:01,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 4048 proven. 1807 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-22 15:51:02,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:02,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2018-10-22 15:51:02,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-22 15:51:02,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-22 15:51:02,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-10-22 15:51:02,455 INFO L87 Difference]: Start difference. First operand 226 states and 248 transitions. Second operand 70 states. [2018-10-22 15:51:04,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:04,516 INFO L93 Difference]: Finished difference Result 1392 states and 1713 transitions. [2018-10-22 15:51:04,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-22 15:51:04,516 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 225 [2018-10-22 15:51:04,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:04,521 INFO L225 Difference]: With dead ends: 1392 [2018-10-22 15:51:04,521 INFO L226 Difference]: Without dead ends: 1299 [2018-10-22 15:51:04,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3837, Invalid=14795, Unknown=0, NotChecked=0, Total=18632 [2018-10-22 15:51:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2018-10-22 15:51:04,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 278. [2018-10-22 15:51:04,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2018-10-22 15:51:04,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 312 transitions. [2018-10-22 15:51:04,610 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 312 transitions. Word has length 225 [2018-10-22 15:51:04,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:04,610 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 312 transitions. [2018-10-22 15:51:04,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-22 15:51:04,610 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 312 transitions. [2018-10-22 15:51:04,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-10-22 15:51:04,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:04,612 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:04,612 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:04,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:04,613 INFO L82 PathProgramCache]: Analyzing trace with hash -8875064, now seen corresponding path program 34 times [2018-10-22 15:51:04,613 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:04,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:04,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:04,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:04,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4621 proven. 2346 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:05,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:05,825 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 15:51:05,835 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:05,924 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:05,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:05,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4621 proven. 2346 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:06,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:06,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-22 15:51:06,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:51:06,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:51:06,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:51:06,008 INFO L87 Difference]: Start difference. First operand 278 states and 312 transitions. Second operand 37 states. [2018-10-22 15:51:06,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:06,235 INFO L93 Difference]: Finished difference Result 424 states and 493 transitions. [2018-10-22 15:51:06,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-22 15:51:06,235 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 277 [2018-10-22 15:51:06,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:06,237 INFO L225 Difference]: With dead ends: 424 [2018-10-22 15:51:06,238 INFO L226 Difference]: Without dead ends: 283 [2018-10-22 15:51:06,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:51:06,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-10-22 15:51:06,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 282. [2018-10-22 15:51:06,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-10-22 15:51:06,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 316 transitions. [2018-10-22 15:51:06,302 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 316 transitions. Word has length 277 [2018-10-22 15:51:06,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:06,302 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 316 transitions. [2018-10-22 15:51:06,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:51:06,303 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 316 transitions. [2018-10-22 15:51:06,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-10-22 15:51:06,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:06,305 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 35, 34, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:06,305 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:06,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:06,305 INFO L82 PathProgramCache]: Analyzing trace with hash 144988506, now seen corresponding path program 35 times [2018-10-22 15:51:06,305 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:06,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:06,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:06,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:06,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4754 proven. 2485 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:07,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:07,070 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 15:51:07,077 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:07,204 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 69 check-sat command(s) [2018-10-22 15:51:07,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:07,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4754 proven. 2485 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:07,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:07,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-22 15:51:07,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-22 15:51:07,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-22 15:51:07,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:51:07,308 INFO L87 Difference]: Start difference. First operand 282 states and 316 transitions. Second operand 38 states. [2018-10-22 15:51:07,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:07,551 INFO L93 Difference]: Finished difference Result 428 states and 497 transitions. [2018-10-22 15:51:07,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-22 15:51:07,551 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 281 [2018-10-22 15:51:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:07,554 INFO L225 Difference]: With dead ends: 428 [2018-10-22 15:51:07,554 INFO L226 Difference]: Without dead ends: 287 [2018-10-22 15:51:07,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:51:07,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-10-22 15:51:07,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2018-10-22 15:51:07,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-10-22 15:51:07,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 320 transitions. [2018-10-22 15:51:07,613 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 320 transitions. Word has length 281 [2018-10-22 15:51:07,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:07,614 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 320 transitions. [2018-10-22 15:51:07,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-22 15:51:07,614 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 320 transitions. [2018-10-22 15:51:07,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-10-22 15:51:07,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:07,616 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 36, 34, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:07,616 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:07,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:07,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1684997612, now seen corresponding path program 36 times [2018-10-22 15:51:07,616 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:07,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:07,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:07,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:07,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 4887 proven. 2628 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:08,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:08,434 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) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:08,444 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:08,569 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-10-22 15:51:08,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:08,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 4887 proven. 2628 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:08,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:08,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-22 15:51:08,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-22 15:51:08,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-22 15:51:08,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:51:08,651 INFO L87 Difference]: Start difference. First operand 286 states and 320 transitions. Second operand 39 states. [2018-10-22 15:51:08,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:08,860 INFO L93 Difference]: Finished difference Result 432 states and 501 transitions. [2018-10-22 15:51:08,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-22 15:51:08,860 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 285 [2018-10-22 15:51:08,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:08,863 INFO L225 Difference]: With dead ends: 432 [2018-10-22 15:51:08,863 INFO L226 Difference]: Without dead ends: 291 [2018-10-22 15:51:08,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:51:08,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-10-22 15:51:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 290. [2018-10-22 15:51:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-10-22 15:51:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 324 transitions. [2018-10-22 15:51:08,936 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 324 transitions. Word has length 285 [2018-10-22 15:51:08,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:08,937 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 324 transitions. [2018-10-22 15:51:08,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-22 15:51:08,937 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 324 transitions. [2018-10-22 15:51:08,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-10-22 15:51:08,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:08,939 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 70, 37, 34, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:08,939 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:08,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:08,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1259149694, now seen corresponding path program 37 times [2018-10-22 15:51:08,939 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:08,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:08,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:08,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:08,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 5020 proven. 2775 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:09,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:09,815 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 15:51:09,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:09,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 5020 proven. 2775 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:09,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:09,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-22 15:51:09,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:51:09,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:51:09,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:51:09,984 INFO L87 Difference]: Start difference. First operand 290 states and 324 transitions. Second operand 40 states. [2018-10-22 15:51:11,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:11,106 INFO L93 Difference]: Finished difference Result 436 states and 505 transitions. [2018-10-22 15:51:11,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-22 15:51:11,107 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 289 [2018-10-22 15:51:11,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:11,108 INFO L225 Difference]: With dead ends: 436 [2018-10-22 15:51:11,109 INFO L226 Difference]: Without dead ends: 295 [2018-10-22 15:51:11,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:51:11,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-10-22 15:51:11,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2018-10-22 15:51:11,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-10-22 15:51:11,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 328 transitions. [2018-10-22 15:51:11,167 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 328 transitions. Word has length 289 [2018-10-22 15:51:11,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:11,168 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 328 transitions. [2018-10-22 15:51:11,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:51:11,168 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 328 transitions. [2018-10-22 15:51:11,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-10-22 15:51:11,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:11,170 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 71, 38, 34, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:11,170 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:11,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:11,170 INFO L82 PathProgramCache]: Analyzing trace with hash -965536752, now seen corresponding path program 38 times [2018-10-22 15:51:11,170 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:11,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:11,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:11,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:11,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5153 proven. 2926 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:13,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:13,384 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 15:51:13,395 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:13,479 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:13,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:13,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5153 proven. 2926 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:13,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:13,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-22 15:51:13,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:51:13,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:51:13,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:51:13,589 INFO L87 Difference]: Start difference. First operand 294 states and 328 transitions. Second operand 41 states. [2018-10-22 15:51:13,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:13,902 INFO L93 Difference]: Finished difference Result 440 states and 509 transitions. [2018-10-22 15:51:13,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-22 15:51:13,903 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 293 [2018-10-22 15:51:13,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:13,904 INFO L225 Difference]: With dead ends: 440 [2018-10-22 15:51:13,904 INFO L226 Difference]: Without dead ends: 299 [2018-10-22 15:51:13,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:51:13,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-10-22 15:51:13,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2018-10-22 15:51:13,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2018-10-22 15:51:13,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 332 transitions. [2018-10-22 15:51:13,972 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 332 transitions. Word has length 293 [2018-10-22 15:51:13,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:13,972 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 332 transitions. [2018-10-22 15:51:13,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 15:51:13,973 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 332 transitions. [2018-10-22 15:51:13,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-10-22 15:51:13,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:13,974 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 72, 39, 34, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:13,974 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:13,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:13,975 INFO L82 PathProgramCache]: Analyzing trace with hash -766151262, now seen corresponding path program 39 times [2018-10-22 15:51:13,975 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:13,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:13,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:13,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:13,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 5286 proven. 3081 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:14,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:14,803 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:51:14,810 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:14,948 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 73 check-sat command(s) [2018-10-22 15:51:14,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:14,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:15,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 5286 proven. 3081 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:15,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:15,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-22 15:51:15,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-22 15:51:15,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-22 15:51:15,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:51:15,072 INFO L87 Difference]: Start difference. First operand 298 states and 332 transitions. Second operand 42 states. [2018-10-22 15:51:15,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:15,293 INFO L93 Difference]: Finished difference Result 444 states and 513 transitions. [2018-10-22 15:51:15,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-22 15:51:15,293 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 297 [2018-10-22 15:51:15,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:15,295 INFO L225 Difference]: With dead ends: 444 [2018-10-22 15:51:15,295 INFO L226 Difference]: Without dead ends: 303 [2018-10-22 15:51:15,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:51:15,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-22 15:51:15,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 302. [2018-10-22 15:51:15,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-10-22 15:51:15,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 336 transitions. [2018-10-22 15:51:15,344 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 336 transitions. Word has length 297 [2018-10-22 15:51:15,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:15,345 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 336 transitions. [2018-10-22 15:51:15,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-22 15:51:15,345 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 336 transitions. [2018-10-22 15:51:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2018-10-22 15:51:15,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:15,346 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 73, 40, 34, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:15,346 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:15,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:15,346 INFO L82 PathProgramCache]: Analyzing trace with hash 2083044916, now seen corresponding path program 40 times [2018-10-22 15:51:15,346 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:15,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:15,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:15,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:15,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 5419 proven. 3240 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:16,386 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:16,386 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 15:51:16,394 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:16,476 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:16,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:16,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 5419 proven. 3240 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:16,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:16,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-22 15:51:16,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-22 15:51:16,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-22 15:51:16,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:51:16,559 INFO L87 Difference]: Start difference. First operand 302 states and 336 transitions. Second operand 43 states. [2018-10-22 15:51:16,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:16,788 INFO L93 Difference]: Finished difference Result 448 states and 517 transitions. [2018-10-22 15:51:16,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-22 15:51:16,788 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 301 [2018-10-22 15:51:16,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:16,790 INFO L225 Difference]: With dead ends: 448 [2018-10-22 15:51:16,790 INFO L226 Difference]: Without dead ends: 307 [2018-10-22 15:51:16,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:51:16,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-10-22 15:51:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 306. [2018-10-22 15:51:16,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2018-10-22 15:51:16,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 340 transitions. [2018-10-22 15:51:16,848 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 340 transitions. Word has length 301 [2018-10-22 15:51:16,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:16,848 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 340 transitions. [2018-10-22 15:51:16,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-22 15:51:16,848 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 340 transitions. [2018-10-22 15:51:16,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-10-22 15:51:16,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:16,850 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 74, 41, 34, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:16,850 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:16,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:16,850 INFO L82 PathProgramCache]: Analyzing trace with hash 52522438, now seen corresponding path program 41 times [2018-10-22 15:51:16,851 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:16,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:16,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:16,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:16,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 5552 proven. 3403 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:17,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:17,820 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 15:51:17,829 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:17,981 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 75 check-sat command(s) [2018-10-22 15:51:17,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:17,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 5552 proven. 3403 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:18,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:18,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-22 15:51:18,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-22 15:51:18,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-22 15:51:18,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:51:18,095 INFO L87 Difference]: Start difference. First operand 306 states and 340 transitions. Second operand 44 states. [2018-10-22 15:51:19,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:19,229 INFO L93 Difference]: Finished difference Result 452 states and 521 transitions. [2018-10-22 15:51:19,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-22 15:51:19,229 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 305 [2018-10-22 15:51:19,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:19,231 INFO L225 Difference]: With dead ends: 452 [2018-10-22 15:51:19,231 INFO L226 Difference]: Without dead ends: 311 [2018-10-22 15:51:19,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:51:19,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-10-22 15:51:19,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 310. [2018-10-22 15:51:19,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2018-10-22 15:51:19,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 344 transitions. [2018-10-22 15:51:19,286 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 344 transitions. Word has length 305 [2018-10-22 15:51:19,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:19,286 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 344 transitions. [2018-10-22 15:51:19,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-22 15:51:19,286 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 344 transitions. [2018-10-22 15:51:19,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-10-22 15:51:19,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:19,288 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 75, 42, 34, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:19,288 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:19,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:19,288 INFO L82 PathProgramCache]: Analyzing trace with hash -130808744, now seen corresponding path program 42 times [2018-10-22 15:51:19,288 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:19,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:19,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:19,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:19,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5685 proven. 3570 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:20,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:20,244 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 15:51:20,251 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:20,542 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-22 15:51:20,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:20,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5685 proven. 3570 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:20,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:20,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-22 15:51:20,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-22 15:51:20,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-22 15:51:20,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:51:20,666 INFO L87 Difference]: Start difference. First operand 310 states and 344 transitions. Second operand 45 states. [2018-10-22 15:51:20,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:20,936 INFO L93 Difference]: Finished difference Result 456 states and 525 transitions. [2018-10-22 15:51:20,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-22 15:51:20,936 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 309 [2018-10-22 15:51:20,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:20,938 INFO L225 Difference]: With dead ends: 456 [2018-10-22 15:51:20,939 INFO L226 Difference]: Without dead ends: 315 [2018-10-22 15:51:20,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:51:20,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-22 15:51:20,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2018-10-22 15:51:20,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-10-22 15:51:20,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 348 transitions. [2018-10-22 15:51:20,991 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 348 transitions. Word has length 309 [2018-10-22 15:51:20,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:20,991 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 348 transitions. [2018-10-22 15:51:20,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-22 15:51:20,992 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 348 transitions. [2018-10-22 15:51:20,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-10-22 15:51:20,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:20,993 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 76, 43, 34, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:20,993 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:20,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:20,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1578435050, now seen corresponding path program 43 times [2018-10-22 15:51:20,993 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:20,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:20,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:20,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:20,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5818 proven. 3741 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:22,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:22,043 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 15:51:22,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:22,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5818 proven. 3741 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:22,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:22,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-22 15:51:22,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-22 15:51:22,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-22 15:51:22,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:51:22,227 INFO L87 Difference]: Start difference. First operand 314 states and 348 transitions. Second operand 46 states. [2018-10-22 15:51:22,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:22,559 INFO L93 Difference]: Finished difference Result 460 states and 529 transitions. [2018-10-22 15:51:22,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-22 15:51:22,559 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 313 [2018-10-22 15:51:22,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:22,561 INFO L225 Difference]: With dead ends: 460 [2018-10-22 15:51:22,561 INFO L226 Difference]: Without dead ends: 319 [2018-10-22 15:51:22,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:51:22,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-10-22 15:51:22,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 318. [2018-10-22 15:51:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2018-10-22 15:51:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 352 transitions. [2018-10-22 15:51:22,622 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 352 transitions. Word has length 313 [2018-10-22 15:51:22,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:22,623 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 352 transitions. [2018-10-22 15:51:22,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-22 15:51:22,623 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 352 transitions. [2018-10-22 15:51:22,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-10-22 15:51:22,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:22,625 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 77, 44, 34, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:22,625 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:22,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:22,625 INFO L82 PathProgramCache]: Analyzing trace with hash -919017860, now seen corresponding path program 44 times [2018-10-22 15:51:22,626 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:22,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:22,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:22,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:22,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:23,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 5951 proven. 3916 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:23,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:23,965 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 15:51:23,973 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:24,055 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:24,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:24,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 5951 proven. 3916 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:24,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:24,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-22 15:51:24,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-22 15:51:24,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-22 15:51:24,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:51:24,179 INFO L87 Difference]: Start difference. First operand 318 states and 352 transitions. Second operand 47 states. [2018-10-22 15:51:24,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:24,549 INFO L93 Difference]: Finished difference Result 464 states and 533 transitions. [2018-10-22 15:51:24,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-22 15:51:24,549 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 317 [2018-10-22 15:51:24,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:24,551 INFO L225 Difference]: With dead ends: 464 [2018-10-22 15:51:24,551 INFO L226 Difference]: Without dead ends: 323 [2018-10-22 15:51:24,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:51:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-10-22 15:51:24,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 322. [2018-10-22 15:51:24,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-10-22 15:51:24,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 356 transitions. [2018-10-22 15:51:24,613 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 356 transitions. Word has length 317 [2018-10-22 15:51:24,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:24,614 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 356 transitions. [2018-10-22 15:51:24,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-22 15:51:24,614 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 356 transitions. [2018-10-22 15:51:24,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-10-22 15:51:24,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:24,616 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 78, 45, 34, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:24,616 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:24,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:24,616 INFO L82 PathProgramCache]: Analyzing trace with hash 2144612878, now seen corresponding path program 45 times [2018-10-22 15:51:24,616 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:24,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:24,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:24,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:24,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 6084 proven. 4095 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-22 15:51:25,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:25,621 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:25,628 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:25,780 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 79 check-sat command(s) [2018-10-22 15:51:25,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:25,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 7768 proven. 4423 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2018-10-22 15:51:28,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:28,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 94 [2018-10-22 15:51:28,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-22 15:51:28,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-22 15:51:28,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-10-22 15:51:28,593 INFO L87 Difference]: Start difference. First operand 322 states and 356 transitions. Second operand 94 states. [2018-10-22 15:51:31,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:31,832 INFO L93 Difference]: Finished difference Result 2112 states and 2601 transitions. [2018-10-22 15:51:31,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-10-22 15:51:31,833 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 321 [2018-10-22 15:51:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:31,838 INFO L225 Difference]: With dead ends: 2112 [2018-10-22 15:51:31,838 INFO L226 Difference]: Without dead ends: 1971 [2018-10-22 15:51:31,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8056 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6849, Invalid=27191, Unknown=0, NotChecked=0, Total=34040 [2018-10-22 15:51:31,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2018-10-22 15:51:31,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 374. [2018-10-22 15:51:31,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2018-10-22 15:51:31,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 420 transitions. [2018-10-22 15:51:31,983 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 420 transitions. Word has length 321 [2018-10-22 15:51:31,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:31,983 INFO L481 AbstractCegarLoop]: Abstraction has 374 states and 420 transitions. [2018-10-22 15:51:31,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-22 15:51:31,983 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 420 transitions. [2018-10-22 15:51:31,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-10-22 15:51:31,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:31,985 INFO L375 BasicCegarLoop]: trace histogram [92, 92, 91, 46, 46, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:31,985 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:31,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:31,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1636016240, now seen corresponding path program 46 times [2018-10-22 15:51:31,986 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:31,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:31,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:31,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:31,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 8461 proven. 4278 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2018-10-22 15:51:33,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:33,007 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:33,014 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:33,108 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:33,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:33,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 8461 proven. 4278 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2018-10-22 15:51:33,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:33,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-22 15:51:33,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-22 15:51:33,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-22 15:51:33,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:51:33,218 INFO L87 Difference]: Start difference. First operand 374 states and 420 transitions. Second operand 49 states. [2018-10-22 15:51:33,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:33,644 INFO L93 Difference]: Finished difference Result 568 states and 661 transitions. [2018-10-22 15:51:33,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-22 15:51:33,645 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 373 [2018-10-22 15:51:33,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:33,646 INFO L225 Difference]: With dead ends: 568 [2018-10-22 15:51:33,646 INFO L226 Difference]: Without dead ends: 379 [2018-10-22 15:51:33,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:51:33,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2018-10-22 15:51:33,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 378. [2018-10-22 15:51:33,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2018-10-22 15:51:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 424 transitions. [2018-10-22 15:51:33,763 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 424 transitions. Word has length 373 [2018-10-22 15:51:33,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:33,763 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 424 transitions. [2018-10-22 15:51:33,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-22 15:51:33,763 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 424 transitions. [2018-10-22 15:51:33,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-10-22 15:51:33,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:33,765 INFO L375 BasicCegarLoop]: trace histogram [93, 93, 92, 47, 46, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:33,766 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:33,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:33,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1792553694, now seen corresponding path program 47 times [2018-10-22 15:51:33,766 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:33,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:33,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:33,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:33,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 8642 proven. 4465 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2018-10-22 15:51:34,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:34,768 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:34,775 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:34,973 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 93 check-sat command(s) [2018-10-22 15:51:34,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:34,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 8642 proven. 4465 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2018-10-22 15:51:35,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:35,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-22 15:51:35,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-22 15:51:35,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-22 15:51:35,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:51:35,084 INFO L87 Difference]: Start difference. First operand 378 states and 424 transitions. Second operand 50 states. [2018-10-22 15:51:35,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:35,412 INFO L93 Difference]: Finished difference Result 572 states and 665 transitions. [2018-10-22 15:51:35,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-22 15:51:35,413 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 377 [2018-10-22 15:51:35,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:35,414 INFO L225 Difference]: With dead ends: 572 [2018-10-22 15:51:35,414 INFO L226 Difference]: Without dead ends: 383 [2018-10-22 15:51:35,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:51:35,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-10-22 15:51:35,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 382. [2018-10-22 15:51:35,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2018-10-22 15:51:35,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 428 transitions. [2018-10-22 15:51:35,556 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 428 transitions. Word has length 377 [2018-10-22 15:51:35,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:35,556 INFO L481 AbstractCegarLoop]: Abstraction has 382 states and 428 transitions. [2018-10-22 15:51:35,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-22 15:51:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 428 transitions. [2018-10-22 15:51:35,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2018-10-22 15:51:35,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:35,559 INFO L375 BasicCegarLoop]: trace histogram [94, 94, 93, 48, 46, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:35,559 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:35,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:35,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1180574132, now seen corresponding path program 48 times [2018-10-22 15:51:35,559 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:35,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:35,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:35,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:35,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17484 backedges. 8823 proven. 4656 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2018-10-22 15:51:36,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:36,644 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:36,651 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:36,840 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 92 check-sat command(s) [2018-10-22 15:51:36,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:36,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17484 backedges. 8823 proven. 4656 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2018-10-22 15:51:36,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:36,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-22 15:51:36,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-22 15:51:36,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-22 15:51:36,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 15:51:36,955 INFO L87 Difference]: Start difference. First operand 382 states and 428 transitions. Second operand 51 states. [2018-10-22 15:51:37,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:37,302 INFO L93 Difference]: Finished difference Result 576 states and 669 transitions. [2018-10-22 15:51:37,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-22 15:51:37,303 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 381 [2018-10-22 15:51:37,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:37,305 INFO L225 Difference]: With dead ends: 576 [2018-10-22 15:51:37,305 INFO L226 Difference]: Without dead ends: 387 [2018-10-22 15:51:37,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 15:51:37,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-10-22 15:51:37,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 386. [2018-10-22 15:51:37,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2018-10-22 15:51:37,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 432 transitions. [2018-10-22 15:51:37,434 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 432 transitions. Word has length 381 [2018-10-22 15:51:37,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:37,434 INFO L481 AbstractCegarLoop]: Abstraction has 386 states and 432 transitions. [2018-10-22 15:51:37,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-22 15:51:37,434 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 432 transitions. [2018-10-22 15:51:37,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2018-10-22 15:51:37,436 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:37,436 INFO L375 BasicCegarLoop]: trace histogram [95, 95, 94, 49, 46, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:37,437 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:37,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:37,437 INFO L82 PathProgramCache]: Analyzing trace with hash 341040454, now seen corresponding path program 49 times [2018-10-22 15:51:37,437 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:37,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:37,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:37,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:37,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:39,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 9004 proven. 4851 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2018-10-22 15:51:39,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:39,138 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:39,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:39,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 9004 proven. 4851 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2018-10-22 15:51:39,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:39,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-22 15:51:39,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-22 15:51:39,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-22 15:51:39,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:51:39,394 INFO L87 Difference]: Start difference. First operand 386 states and 432 transitions. Second operand 52 states. [2018-10-22 15:51:39,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:39,759 INFO L93 Difference]: Finished difference Result 623 states and 716 transitions. [2018-10-22 15:51:39,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-22 15:51:39,760 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 385 [2018-10-22 15:51:39,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:39,762 INFO L225 Difference]: With dead ends: 623 [2018-10-22 15:51:39,763 INFO L226 Difference]: Without dead ends: 434 [2018-10-22 15:51:39,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:51:39,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-22 15:51:39,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 390. [2018-10-22 15:51:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2018-10-22 15:51:39,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 436 transitions. [2018-10-22 15:51:39,879 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 436 transitions. Word has length 385 [2018-10-22 15:51:39,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:39,880 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 436 transitions. [2018-10-22 15:51:39,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-22 15:51:39,880 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 436 transitions. [2018-10-22 15:51:39,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2018-10-22 15:51:39,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:39,881 INFO L375 BasicCegarLoop]: trace histogram [96, 96, 95, 50, 46, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:39,882 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:39,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:39,882 INFO L82 PathProgramCache]: Analyzing trace with hash 855474136, now seen corresponding path program 50 times [2018-10-22 15:51:39,882 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:39,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:39,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:39,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:39,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:41,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18240 backedges. 9868 proven. 8191 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-10-22 15:51:41,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:41,140 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:41,149 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:41,253 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:41,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:41,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 18240 backedges. 9868 proven. 8191 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-10-22 15:51:41,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:41,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-22 15:51:41,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-22 15:51:41,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-22 15:51:41,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-22 15:51:41,473 INFO L87 Difference]: Start difference. First operand 390 states and 436 transitions. Second operand 53 states. [2018-10-22 15:51:42,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:42,568 INFO L93 Difference]: Finished difference Result 1319 states and 1599 transitions. [2018-10-22 15:51:42,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-22 15:51:42,568 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 389 [2018-10-22 15:51:42,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:42,575 INFO L225 Difference]: With dead ends: 1319 [2018-10-22 15:51:42,576 INFO L226 Difference]: Without dead ends: 1315 [2018-10-22 15:51:42,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-22 15:51:42,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2018-10-22 15:51:42,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 410. [2018-10-22 15:51:42,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2018-10-22 15:51:42,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 461 transitions. [2018-10-22 15:51:42,787 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 461 transitions. Word has length 389 [2018-10-22 15:51:42,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:42,788 INFO L481 AbstractCegarLoop]: Abstraction has 410 states and 461 transitions. [2018-10-22 15:51:42,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-22 15:51:42,788 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 461 transitions. [2018-10-22 15:51:42,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2018-10-22 15:51:42,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:42,790 INFO L375 BasicCegarLoop]: trace histogram [101, 101, 100, 51, 50, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:42,791 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:42,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:42,791 INFO L82 PathProgramCache]: Analyzing trace with hash 659370172, now seen corresponding path program 51 times [2018-10-22 15:51:42,791 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:42,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:42,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:42,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:42,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 10198 proven. 5151 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2018-10-22 15:51:45,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:45,257 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:45,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:45,409 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-10-22 15:51:45,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:45,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 10198 proven. 5151 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2018-10-22 15:51:45,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:45,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-22 15:51:45,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-22 15:51:45,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-22 15:51:45,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2018-10-22 15:51:45,725 INFO L87 Difference]: Start difference. First operand 410 states and 461 transitions. Second operand 56 states. [2018-10-22 15:51:56,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:56,773 INFO L93 Difference]: Finished difference Result 5966 states and 7344 transitions. [2018-10-22 15:51:56,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-22 15:51:56,773 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 409 [2018-10-22 15:51:56,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:56,793 INFO L225 Difference]: With dead ends: 5966 [2018-10-22 15:51:56,793 INFO L226 Difference]: Without dead ends: 5755 [2018-10-22 15:51:56,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 408 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=115, Invalid=3077, Unknown=0, NotChecked=0, Total=3192 [2018-10-22 15:51:56,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2018-10-22 15:52:01,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 5559. [2018-10-22 15:52:01,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5559 states. [2018-10-22 15:52:01,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5559 states to 5559 states and 5659 transitions. [2018-10-22 15:52:01,364 INFO L78 Accepts]: Start accepts. Automaton has 5559 states and 5659 transitions. Word has length 409 [2018-10-22 15:52:01,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:01,364 INFO L481 AbstractCegarLoop]: Abstraction has 5559 states and 5659 transitions. [2018-10-22 15:52:01,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-22 15:52:01,364 INFO L276 IsEmpty]: Start isEmpty. Operand 5559 states and 5659 transitions. [2018-10-22 15:52:01,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2018-10-22 15:52:01,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:01,366 INFO L375 BasicCegarLoop]: trace histogram [102, 102, 101, 52, 50, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:01,366 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:01,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:01,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1058191024, now seen corresponding path program 52 times [2018-10-22 15:52:01,366 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:01,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:01,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:01,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:01,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:03,507 INFO L134 CoverageAnalysis]: Checked inductivity of 20604 backedges. 10504 proven. 9901 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2018-10-22 15:52:03,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:03,507 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:03,516 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:52:03,629 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:52:03,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:03,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20604 backedges. 10504 proven. 9901 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2018-10-22 15:52:03,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:03,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-22 15:52:03,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-22 15:52:03,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-22 15:52:03,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-22 15:52:03,848 INFO L87 Difference]: Start difference. First operand 5559 states and 5659 transitions. Second operand 54 states. [2018-10-22 15:52:09,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:09,265 INFO L93 Difference]: Finished difference Result 11122 states and 11323 transitions. [2018-10-22 15:52:09,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-22 15:52:09,265 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 413 [2018-10-22 15:52:09,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:09,281 INFO L225 Difference]: With dead ends: 11122 [2018-10-22 15:52:09,281 INFO L226 Difference]: Without dead ends: 5563 [2018-10-22 15:52:09,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-22 15:52:09,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5563 states. [2018-10-22 15:52:13,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5563 to 5563. [2018-10-22 15:52:13,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5563 states. [2018-10-22 15:52:13,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5563 states to 5563 states and 5663 transitions. [2018-10-22 15:52:13,901 INFO L78 Accepts]: Start accepts. Automaton has 5563 states and 5663 transitions. Word has length 413 [2018-10-22 15:52:13,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:13,901 INFO L481 AbstractCegarLoop]: Abstraction has 5563 states and 5663 transitions. [2018-10-22 15:52:13,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-22 15:52:13,902 INFO L276 IsEmpty]: Start isEmpty. Operand 5563 states and 5663 transitions. [2018-10-22 15:52:13,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2018-10-22 15:52:13,903 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:13,903 INFO L375 BasicCegarLoop]: trace histogram [103, 103, 102, 52, 51, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:13,903 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:13,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:13,904 INFO L82 PathProgramCache]: Analyzing trace with hash -700433182, now seen corresponding path program 53 times [2018-10-22 15:52:13,904 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:13,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:13,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:13,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:13,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 21012 backedges. 15656 proven. 0 refuted. 0 times theorem prover too weak. 5356 trivial. 0 not checked. [2018-10-22 15:52:15,371 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:52:15,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2018-10-22 15:52:15,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-22 15:52:15,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-22 15:52:15,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-22 15:52:15,373 INFO L87 Difference]: Start difference. First operand 5563 states and 5663 transitions. Second operand 53 states. [2018-10-22 15:52:15,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:15,640 INFO L93 Difference]: Finished difference Result 5563 states and 5663 transitions. [2018-10-22 15:52:15,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-22 15:52:15,641 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 417 [2018-10-22 15:52:15,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:15,641 INFO L225 Difference]: With dead ends: 5563 [2018-10-22 15:52:15,641 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 15:52:15,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-22 15:52:15,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 15:52:15,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 15:52:15,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 15:52:15,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 15:52:15,646 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 417 [2018-10-22 15:52:15,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:15,646 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 15:52:15,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-22 15:52:15,646 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 15:52:15,646 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 15:52:15,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 15:52:25,328 WARN L179 SmtUtils]: Spent 9.67 s on a formula simplification. DAG size of input: 1852 DAG size of output: 1440 [2018-10-22 15:52:55,536 WARN L179 SmtUtils]: Spent 30.19 s on a formula simplification. DAG size of input: 1429 DAG size of output: 509 [2018-10-22 15:52:55,543 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 15:52:55,543 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 15:52:55,543 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 19) no Hoare annotation was computed. [2018-10-22 15:52:55,543 INFO L425 ceAbstractionStarter]: For program point L15-2(lines 14 22) no Hoare annotation was computed. [2018-10-22 15:52:55,543 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 15:52:55,543 INFO L425 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2018-10-22 15:52:55,543 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-10-22 15:52:55,543 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 15:52:55,543 INFO L428 ceAbstractionStarter]: At program point L24(lines 10 25) the Hoare annotation is: true [2018-10-22 15:52:55,543 INFO L425 ceAbstractionStarter]: For program point L14-1(lines 14 22) no Hoare annotation was computed. [2018-10-22 15:52:55,546 INFO L421 ceAbstractionStarter]: At program point L14-3(lines 14 22) the Hoare annotation is: (let ((.cse16 (<= ULTIMATE.start_main_~y~0 27)) (.cse17 (<= 27 ULTIMATE.start_main_~y~0)) (.cse1 (<= 31 ULTIMATE.start_main_~y~0)) (.cse0 (<= ULTIMATE.start_main_~y~0 31)) (.cse15 (<= ULTIMATE.start_main_~y~0 21)) (.cse14 (<= 21 ULTIMATE.start_main_~y~0)) (.cse11 (<= ULTIMATE.start_main_~y~0 18)) (.cse10 (<= 18 ULTIMATE.start_main_~y~0)) (.cse13 (<= 39 ULTIMATE.start_main_~y~0)) (.cse12 (<= ULTIMATE.start_main_~y~0 39)) (.cse38 (<= 42 ULTIMATE.start_main_~y~0)) (.cse39 (<= ULTIMATE.start_main_~y~0 42)) (.cse4 (<= 36 ULTIMATE.start_main_~y~0)) (.cse5 (<= ULTIMATE.start_main_~y~0 36)) (.cse52 (<= ULTIMATE.start_main_~y~0 1)) (.cse53 (<= 1 ULTIMATE.start_main_~y~0)) (.cse34 (<= 17 ULTIMATE.start_main_~y~0)) (.cse35 (<= ULTIMATE.start_main_~y~0 17)) (.cse3 (<= 24 ULTIMATE.start_main_~y~0)) (.cse2 (<= ULTIMATE.start_main_~y~0 24)) (.cse8 (<= 37 ULTIMATE.start_main_~y~0)) (.cse9 (<= ULTIMATE.start_main_~y~0 37)) (.cse77 (<= ULTIMATE.start_main_~y~0 19)) (.cse76 (<= 19 ULTIMATE.start_main_~y~0)) (.cse22 (<= 47 ULTIMATE.start_main_~y~0)) (.cse23 (<= ULTIMATE.start_main_~y~0 47)) (.cse62 (<= ULTIMATE.start_main_~y~0 22)) (.cse63 (<= 22 ULTIMATE.start_main_~y~0)) (.cse74 (<= ULTIMATE.start_main_~y~0 34)) (.cse75 (<= 34 ULTIMATE.start_main_~y~0)) (.cse64 (<= 26 ULTIMATE.start_main_~y~0)) (.cse65 (<= ULTIMATE.start_main_~y~0 26)) (.cse32 (<= ULTIMATE.start_main_~y~0 32)) (.cse33 (<= 32 ULTIMATE.start_main_~y~0)) (.cse73 (<= 16 ULTIMATE.start_main_~y~0)) (.cse72 (<= ULTIMATE.start_main_~y~0 16)) (.cse54 (<= ULTIMATE.start_main_~y~0 46)) (.cse55 (<= 46 ULTIMATE.start_main_~y~0)) (.cse57 (<= 29 ULTIMATE.start_main_~y~0)) (.cse56 (<= ULTIMATE.start_main_~y~0 29)) (.cse78 (<= 6 ULTIMATE.start_main_~y~0)) (.cse79 (<= ULTIMATE.start_main_~y~0 6)) (.cse7 (<= 48 ULTIMATE.start_main_~y~0)) (.cse6 (<= ULTIMATE.start_main_~y~0 48)) (.cse20 (<= 7 ULTIMATE.start_main_~y~0)) (.cse21 (<= ULTIMATE.start_main_~y~0 7)) (.cse40 (<= ULTIMATE.start_main_~y~0 3)) (.cse41 (<= 3 ULTIMATE.start_main_~y~0)) (.cse66 (<= 12 ULTIMATE.start_main_~y~0)) (.cse67 (<= ULTIMATE.start_main_~y~0 12)) (.cse82 (<= ULTIMATE.start_main_~y~0 9)) (.cse83 (<= 9 ULTIMATE.start_main_~y~0)) (.cse58 (<= ULTIMATE.start_main_~y~0 35)) (.cse59 (<= 35 ULTIMATE.start_main_~y~0)) (.cse28 (<= 15 ULTIMATE.start_main_~y~0)) (.cse29 (<= ULTIMATE.start_main_~y~0 15)) (.cse30 (<= ULTIMATE.start_main_~y~0 14)) (.cse31 (<= 14 ULTIMATE.start_main_~y~0)) (.cse46 (<= ULTIMATE.start_main_~y~0 11)) (.cse47 (<= 11 ULTIMATE.start_main_~y~0)) (.cse42 (<= 10 ULTIMATE.start_main_~y~0)) (.cse43 (<= ULTIMATE.start_main_~y~0 10)) (.cse26 (<= ULTIMATE.start_main_~y~0 5)) (.cse27 (<= 5 ULTIMATE.start_main_~y~0)) (.cse44 (<= ULTIMATE.start_main_~y~0 13)) (.cse45 (<= 13 ULTIMATE.start_main_~y~0)) (.cse95 (<= ULTIMATE.start_main_~y~0 20)) (.cse94 (<= 20 ULTIMATE.start_main_~y~0)) (.cse18 (<= 41 ULTIMATE.start_main_~y~0)) (.cse19 (<= ULTIMATE.start_main_~y~0 41)) (.cse90 (<= 33 ULTIMATE.start_main_~y~0)) (.cse91 (<= ULTIMATE.start_main_~y~0 33)) (.cse24 (<= 28 ULTIMATE.start_main_~y~0)) (.cse25 (<= ULTIMATE.start_main_~y~0 28)) (.cse51 (<= 30 ULTIMATE.start_main_~y~0)) (.cse50 (<= ULTIMATE.start_main_~y~0 30)) (.cse68 (<= 2 ULTIMATE.start_main_~y~0)) (.cse69 (<= ULTIMATE.start_main_~y~0 2)) (.cse84 (<= 38 ULTIMATE.start_main_~y~0)) (.cse85 (<= ULTIMATE.start_main_~y~0 38)) (.cse88 (<= 8 ULTIMATE.start_main_~y~0)) (.cse89 (<= ULTIMATE.start_main_~y~0 8)) (.cse60 (<= ULTIMATE.start_main_~y~0 0)) (.cse61 (<= 0 ULTIMATE.start_main_~y~0)) (.cse93 (<= ULTIMATE.start_main_~y~0 4)) (.cse92 (<= 4 ULTIMATE.start_main_~y~0)) (.cse87 (<= 23 ULTIMATE.start_main_~y~0)) (.cse86 (<= ULTIMATE.start_main_~y~0 23)) (.cse48 (<= 45 ULTIMATE.start_main_~y~0)) (.cse49 (<= ULTIMATE.start_main_~y~0 45)) (.cse98 (<= ULTIMATE.start_main_~y~0 40)) (.cse99 (<= 40 ULTIMATE.start_main_~y~0)) (.cse70 (<= 49 ULTIMATE.start_main_~y~0)) (.cse71 (<= ULTIMATE.start_main_~y~0 49)) (.cse36 (<= 25 ULTIMATE.start_main_~y~0)) (.cse37 (<= ULTIMATE.start_main_~y~0 25)) (.cse81 (<= 43 ULTIMATE.start_main_~y~0)) (.cse80 (<= ULTIMATE.start_main_~y~0 43)) (.cse97 (<= 44 ULTIMATE.start_main_~y~0)) (.cse96 (<= ULTIMATE.start_main_~y~0 44))) (or (and (<= 31 ULTIMATE.start_main_~x~0) .cse0 (<= ULTIMATE.start_main_~x~0 31) .cse1) (and (<= ULTIMATE.start_main_~x~0 76) (<= 76 ULTIMATE.start_main_~x~0) .cse2 .cse3) (and .cse4 (<= ULTIMATE.start_main_~x~0 64) (<= 64 ULTIMATE.start_main_~x~0) .cse5) (and (<= ULTIMATE.start_main_~x~0 48) (<= 48 ULTIMATE.start_main_~x~0) .cse6 .cse7) (and (<= 37 ULTIMATE.start_main_~x~0) .cse8 (<= ULTIMATE.start_main_~x~0 37) .cse9) (and .cse10 (<= 18 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 18) .cse11) (and (<= ULTIMATE.start_main_~x~0 61) .cse12 .cse13 (<= 61 ULTIMATE.start_main_~x~0)) (and .cse14 .cse15 (<= ULTIMATE.start_main_~x~0 79) (<= 79 ULTIMATE.start_main_~x~0)) (and (<= 73 ULTIMATE.start_main_~x~0) .cse16 (<= ULTIMATE.start_main_~x~0 73) .cse17) (and .cse16 (<= ULTIMATE.start_main_~x~0 27) (<= 27 ULTIMATE.start_main_~x~0) .cse17) (and .cse18 (<= 59 ULTIMATE.start_main_~x~0) .cse19 (<= ULTIMATE.start_main_~x~0 59)) (and (<= 7 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 7) .cse20 .cse21) (and .cse22 (<= ULTIMATE.start_main_~x~0 53) (<= 53 ULTIMATE.start_main_~x~0) .cse23) (and (<= 28 ULTIMATE.start_main_~x~0) .cse24 .cse25 (<= ULTIMATE.start_main_~x~0 28)) (and .cse1 .cse0 (<= 69 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 69)) (and .cse26 (<= 5 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 5) .cse27) (and (<= ULTIMATE.start_main_~x~0 85) (<= 85 ULTIMATE.start_main_~x~0) .cse28 .cse29) (and .cse30 (<= 14 ULTIMATE.start_main_~x~0) .cse31 (<= ULTIMATE.start_main_~x~0 14)) (and .cse15 (<= 21 ULTIMATE.start_main_~x~0) .cse14 (<= ULTIMATE.start_main_~x~0 21)) (and (<= ULTIMATE.start_main_~x~0 68) .cse32 .cse33 (<= 68 ULTIMATE.start_main_~x~0)) (and .cse11 .cse10 (<= 82 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 82)) (and .cse34 (<= 17 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 17) .cse35) (and .cse36 .cse37 (<= 75 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 75)) (and (<= ULTIMATE.start_main_~x~0 58) (<= 58 ULTIMATE.start_main_~x~0) .cse38 .cse39) (and (<= 97 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 97) .cse40 .cse41) (and .cse13 (<= ULTIMATE.start_main_~x~0 39) (<= 39 ULTIMATE.start_main_~x~0) .cse12) (and (<= ULTIMATE.start_main_~x~0 90) (<= 90 ULTIMATE.start_main_~x~0) .cse42 .cse43) (and .cse44 .cse45 (<= ULTIMATE.start_main_~x~0 13) (<= 13 ULTIMATE.start_main_~x~0)) (and .cse46 (<= 89 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 89) .cse47) (and (<= ULTIMATE.start_main_~x~0 42) (<= 42 ULTIMATE.start_main_~x~0) .cse38 .cse39) (and .cse48 (<= 45 ULTIMATE.start_main_~x~0) .cse49 (<= ULTIMATE.start_main_~x~0 45)) (and (<= ULTIMATE.start_main_~x~0 70) .cse50 .cse51 (<= 70 ULTIMATE.start_main_~x~0)) (and .cse52 (<= 1 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 1) .cse53) (and (<= ULTIMATE.start_main_~x~0 36) (<= 36 ULTIMATE.start_main_~x~0) .cse4 .cse5) (and .cse54 (<= ULTIMATE.start_main_~x~0 46) .cse55 (<= 46 ULTIMATE.start_main_~x~0)) (and (<= 71 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 71) .cse56 .cse57) (and .cse58 (<= ULTIMATE.start_main_~x~0 65) (<= 65 ULTIMATE.start_main_~x~0) .cse59) (and .cse60 (<= ULTIMATE.start_main_~x~0 0) (<= 0 ULTIMATE.start_main_~x~0) .cse61) (and .cse62 (<= ULTIMATE.start_main_~x~0 78) (<= 78 ULTIMATE.start_main_~x~0) .cse63) (and .cse64 (<= 26 ULTIMATE.start_main_~x~0) .cse65 (<= ULTIMATE.start_main_~x~0 26)) (and .cse66 (<= ULTIMATE.start_main_~x~0 88) .cse67 (<= 88 ULTIMATE.start_main_~x~0)) (and .cse52 .cse53 (<= 99 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 99)) (and (<= ULTIMATE.start_main_~x~0 83) .cse34 (<= 83 ULTIMATE.start_main_~x~0) .cse35) (and .cse68 .cse69 (<= ULTIMATE.start_main_~x~0 2) (<= 2 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 51) .cse70 (<= 51 ULTIMATE.start_main_~x~0) .cse71) (and (<= 24 ULTIMATE.start_main_~x~0) .cse3 .cse2 (<= ULTIMATE.start_main_~x~0 24)) (and .cse8 .cse9 (<= 63 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 63)) (and (<= 84 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 84) .cse72 .cse73) (and (<= 66 ULTIMATE.start_main_~x~0) .cse74 .cse75 (<= ULTIMATE.start_main_~x~0 66)) (and .cse76 (<= ULTIMATE.start_main_~x~0 81) (<= 81 ULTIMATE.start_main_~x~0) .cse77) (and (<= 19 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 19) .cse77 .cse76) (and (<= ULTIMATE.start_main_~x~0 47) (<= 47 ULTIMATE.start_main_~x~0) .cse22 .cse23) (and (<= 6 ULTIMATE.start_main_~x~0) .cse78 (<= ULTIMATE.start_main_~x~0 6) .cse79) (and .cse62 (<= 22 ULTIMATE.start_main_~x~0) .cse63 (<= ULTIMATE.start_main_~x~0 22)) (and (<= ULTIMATE.start_main_~x~0 34) .cse74 .cse75 (<= 34 ULTIMATE.start_main_~x~0)) (and (<= 43 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 43) .cse80 .cse81) (and (<= ULTIMATE.start_main_~x~0 50) (<= 50 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 50) (<= 50 ULTIMATE.start_main_~y~0)) (and .cse64 (<= ULTIMATE.start_main_~x~0 74) .cse65 (<= 74 ULTIMATE.start_main_~x~0)) (and (<= 32 ULTIMATE.start_main_~x~0) .cse32 .cse33 (<= ULTIMATE.start_main_~x~0 32)) (and (<= ULTIMATE.start_main_~x~0 16) .cse73 .cse72 (<= 16 ULTIMATE.start_main_~x~0)) (and .cse82 .cse83 (<= ULTIMATE.start_main_~x~0 9) (<= 9 ULTIMATE.start_main_~x~0)) (and .cse54 .cse55 (<= 54 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 54)) (and (<= 29 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 29) .cse57 .cse56) (and (<= ULTIMATE.start_main_~x~0 94) .cse78 (<= 94 ULTIMATE.start_main_~x~0) .cse79) (and (<= 52 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 52) .cse7 .cse6) (and .cse20 (<= 93 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 93) .cse21) (and (<= ULTIMATE.start_main_~x~0 38) .cse84 (<= 38 ULTIMATE.start_main_~x~0) .cse85) (and (<= ULTIMATE.start_main_~x~0 3) .cse40 (<= 3 ULTIMATE.start_main_~x~0) .cse41) (and (<= ULTIMATE.start_main_~x~0 77) (<= 77 ULTIMATE.start_main_~x~0) .cse86 .cse87) (and (<= ULTIMATE.start_main_~x~0 12) .cse66 (<= 12 ULTIMATE.start_main_~x~0) .cse67) (and .cse82 (<= 91 ULTIMATE.start_main_~x~0) .cse83 (<= ULTIMATE.start_main_~x~0 91)) (and (<= ULTIMATE.start_main_~x~0 8) .cse88 .cse89 (<= 8 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 35) .cse58 .cse59 (<= 35 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 67) (<= 67 ULTIMATE.start_main_~x~0) .cse90 .cse91) (and (<= ULTIMATE.start_main_~x~0 15) .cse28 (<= 15 ULTIMATE.start_main_~x~0) .cse29) (and (<= 86 ULTIMATE.start_main_~x~0) .cse30 (<= ULTIMATE.start_main_~x~0 86) .cse31) (and .cse92 (<= ULTIMATE.start_main_~x~0 4) .cse93 (<= 4 ULTIMATE.start_main_~x~0)) (and .cse46 (<= ULTIMATE.start_main_~x~0 11) (<= 11 ULTIMATE.start_main_~x~0) .cse47) (and .cse42 (<= 10 ULTIMATE.start_main_~x~0) .cse43 (<= ULTIMATE.start_main_~x~0 10)) (and .cse26 .cse27 (<= ULTIMATE.start_main_~x~0 95) (<= 95 ULTIMATE.start_main_~x~0)) (and .cse44 (<= ULTIMATE.start_main_~x~0 87) (<= 87 ULTIMATE.start_main_~x~0) .cse45) (and (<= ULTIMATE.start_main_~x~0 20) .cse94 .cse95 (<= 20 ULTIMATE.start_main_~x~0)) (and .cse95 (<= ULTIMATE.start_main_~x~0 80) .cse94 (<= 80 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 41) .cse18 .cse19 (<= 41 ULTIMATE.start_main_~x~0)) (and (<= 33 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 33) .cse90 .cse91) (and .cse24 .cse25 (<= 72 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 72)) (and .cse51 (<= ULTIMATE.start_main_~x~0 30) (<= 30 ULTIMATE.start_main_~x~0) .cse50) (and (<= 56 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 56) .cse96 .cse97) (and .cse98 (<= ULTIMATE.start_main_~x~0 60) (<= 60 ULTIMATE.start_main_~x~0) .cse99) (and .cse68 .cse69 (<= 98 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 98)) (and (<= 62 ULTIMATE.start_main_~x~0) .cse84 (<= ULTIMATE.start_main_~x~0 62) .cse85) (and (<= ULTIMATE.start_main_~x~0 92) (<= 92 ULTIMATE.start_main_~x~0) .cse88 .cse89) (and .cse60 (<= 100 ULTIMATE.start_main_~x~0) .cse61 (<= ULTIMATE.start_main_~x~0 100)) (and .cse93 (<= ULTIMATE.start_main_~x~0 96) (<= 96 ULTIMATE.start_main_~x~0) .cse92) (and .cse87 (<= 23 ULTIMATE.start_main_~x~0) .cse86 (<= ULTIMATE.start_main_~x~0 23)) (and .cse48 (<= 55 ULTIMATE.start_main_~x~0) .cse49 (<= ULTIMATE.start_main_~x~0 55)) (and .cse98 (<= 40 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 40) .cse99) (and (<= ULTIMATE.start_main_~x~0 49) (<= 49 ULTIMATE.start_main_~x~0) .cse70 .cse71) (and (<= ULTIMATE.start_main_~x~0 25) (<= 25 ULTIMATE.start_main_~x~0) .cse36 .cse37) (and (<= ULTIMATE.start_main_~x~0 57) .cse81 (<= 57 ULTIMATE.start_main_~x~0) .cse80) (and .cse97 .cse96 (<= 44 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 44)))) [2018-10-22 15:52:55,546 INFO L425 ceAbstractionStarter]: For program point L14-4(lines 14 22) no Hoare annotation was computed. [2018-10-22 15:52:55,546 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 15:52:55,546 INFO L428 ceAbstractionStarter]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2018-10-22 15:52:55,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:52:55 BoogieIcfgContainer [2018-10-22 15:52:55,594 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:52:55,595 INFO L168 Benchmark]: Toolchain (without parser) took 150723.98 ms. Allocated memory was 1.5 GB in the beginning and 3.6 GB in the end (delta: 2.1 GB). Free memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-10-22 15:52:55,596 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:52:55,596 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.54 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:52:55,597 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.55 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:52:55,597 INFO L168 Benchmark]: Boogie Preprocessor took 21.13 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:52:55,599 INFO L168 Benchmark]: RCFGBuilder took 313.13 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 753.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -802.1 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:52:55,600 INFO L168 Benchmark]: TraceAbstraction took 150112.91 ms. Allocated memory was 2.3 GB in the beginning and 3.6 GB in the end (delta: 1.4 GB). Free memory was 2.2 GB in the beginning and 2.9 GB in the end (delta: -647.5 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-10-22 15:52:55,604 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 236.54 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 35.55 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.13 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 313.13 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 753.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -802.1 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 150112.91 ms. Allocated memory was 2.3 GB in the beginning and 3.6 GB in the end (delta: 1.4 GB). Free memory was 2.2 GB in the beginning and 2.9 GB in the end (delta: -647.5 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((31 <= x && y <= 31) && x <= 31) && 31 <= y) || (((x <= 76 && 76 <= x) && y <= 24) && 24 <= y)) || (((36 <= y && x <= 64) && 64 <= x) && y <= 36)) || (((x <= 48 && 48 <= x) && y <= 48) && 48 <= y)) || (((37 <= x && 37 <= y) && x <= 37) && y <= 37)) || (((18 <= y && 18 <= x) && x <= 18) && y <= 18)) || (((x <= 61 && y <= 39) && 39 <= y) && 61 <= x)) || (((21 <= y && y <= 21) && x <= 79) && 79 <= x)) || (((73 <= x && y <= 27) && x <= 73) && 27 <= y)) || (((y <= 27 && x <= 27) && 27 <= x) && 27 <= y)) || (((41 <= y && 59 <= x) && y <= 41) && x <= 59)) || (((7 <= x && x <= 7) && 7 <= y) && y <= 7)) || (((47 <= y && x <= 53) && 53 <= x) && y <= 47)) || (((28 <= x && 28 <= y) && y <= 28) && x <= 28)) || (((31 <= y && y <= 31) && 69 <= x) && x <= 69)) || (((y <= 5 && 5 <= x) && x <= 5) && 5 <= y)) || (((x <= 85 && 85 <= x) && 15 <= y) && y <= 15)) || (((y <= 14 && 14 <= x) && 14 <= y) && x <= 14)) || (((y <= 21 && 21 <= x) && 21 <= y) && x <= 21)) || (((x <= 68 && y <= 32) && 32 <= y) && 68 <= x)) || (((y <= 18 && 18 <= y) && 82 <= x) && x <= 82)) || (((17 <= y && 17 <= x) && x <= 17) && y <= 17)) || (((25 <= y && y <= 25) && 75 <= x) && x <= 75)) || (((x <= 58 && 58 <= x) && 42 <= y) && y <= 42)) || (((97 <= x && x <= 97) && y <= 3) && 3 <= y)) || (((39 <= y && x <= 39) && 39 <= x) && y <= 39)) || (((x <= 90 && 90 <= x) && 10 <= y) && y <= 10)) || (((y <= 13 && 13 <= y) && x <= 13) && 13 <= x)) || (((y <= 11 && 89 <= x) && x <= 89) && 11 <= y)) || (((x <= 42 && 42 <= x) && 42 <= y) && y <= 42)) || (((45 <= y && 45 <= x) && y <= 45) && x <= 45)) || (((x <= 70 && y <= 30) && 30 <= y) && 70 <= x)) || (((y <= 1 && 1 <= x) && x <= 1) && 1 <= y)) || (((x <= 36 && 36 <= x) && 36 <= y) && y <= 36)) || (((y <= 46 && x <= 46) && 46 <= y) && 46 <= x)) || (((71 <= x && x <= 71) && y <= 29) && 29 <= y)) || (((y <= 35 && x <= 65) && 65 <= x) && 35 <= y)) || (((y <= 0 && x <= 0) && 0 <= x) && 0 <= y)) || (((y <= 22 && x <= 78) && 78 <= x) && 22 <= y)) || (((26 <= y && 26 <= x) && y <= 26) && x <= 26)) || (((12 <= y && x <= 88) && y <= 12) && 88 <= x)) || (((y <= 1 && 1 <= y) && 99 <= x) && x <= 99)) || (((x <= 83 && 17 <= y) && 83 <= x) && y <= 17)) || (((2 <= y && y <= 2) && x <= 2) && 2 <= x)) || (((x <= 51 && 49 <= y) && 51 <= x) && y <= 49)) || (((24 <= x && 24 <= y) && y <= 24) && x <= 24)) || (((37 <= y && y <= 37) && 63 <= x) && x <= 63)) || (((84 <= x && x <= 84) && y <= 16) && 16 <= y)) || (((66 <= x && y <= 34) && 34 <= y) && x <= 66)) || (((19 <= y && x <= 81) && 81 <= x) && y <= 19)) || (((19 <= x && x <= 19) && y <= 19) && 19 <= y)) || (((x <= 47 && 47 <= x) && 47 <= y) && y <= 47)) || (((6 <= x && 6 <= y) && x <= 6) && y <= 6)) || (((y <= 22 && 22 <= x) && 22 <= y) && x <= 22)) || (((x <= 34 && y <= 34) && 34 <= y) && 34 <= x)) || (((43 <= x && x <= 43) && y <= 43) && 43 <= y)) || (((x <= 50 && 50 <= x) && y <= 50) && 50 <= y)) || (((26 <= y && x <= 74) && y <= 26) && 74 <= x)) || (((32 <= x && y <= 32) && 32 <= y) && x <= 32)) || (((x <= 16 && 16 <= y) && y <= 16) && 16 <= x)) || (((y <= 9 && 9 <= y) && x <= 9) && 9 <= x)) || (((y <= 46 && 46 <= y) && 54 <= x) && x <= 54)) || (((29 <= x && x <= 29) && 29 <= y) && y <= 29)) || (((x <= 94 && 6 <= y) && 94 <= x) && y <= 6)) || (((52 <= x && x <= 52) && 48 <= y) && y <= 48)) || (((7 <= y && 93 <= x) && x <= 93) && y <= 7)) || (((x <= 38 && 38 <= y) && 38 <= x) && y <= 38)) || (((x <= 3 && y <= 3) && 3 <= x) && 3 <= y)) || (((x <= 77 && 77 <= x) && y <= 23) && 23 <= y)) || (((x <= 12 && 12 <= y) && 12 <= x) && y <= 12)) || (((y <= 9 && 91 <= x) && 9 <= y) && x <= 91)) || (((x <= 8 && 8 <= y) && y <= 8) && 8 <= x)) || (((x <= 35 && y <= 35) && 35 <= y) && 35 <= x)) || (((x <= 67 && 67 <= x) && 33 <= y) && y <= 33)) || (((x <= 15 && 15 <= y) && 15 <= x) && y <= 15)) || (((86 <= x && y <= 14) && x <= 86) && 14 <= y)) || (((4 <= y && x <= 4) && y <= 4) && 4 <= x)) || (((y <= 11 && x <= 11) && 11 <= x) && 11 <= y)) || (((10 <= y && 10 <= x) && y <= 10) && x <= 10)) || (((y <= 5 && 5 <= y) && x <= 95) && 95 <= x)) || (((y <= 13 && x <= 87) && 87 <= x) && 13 <= y)) || (((x <= 20 && 20 <= y) && y <= 20) && 20 <= x)) || (((y <= 20 && x <= 80) && 20 <= y) && 80 <= x)) || (((x <= 41 && 41 <= y) && y <= 41) && 41 <= x)) || (((33 <= x && x <= 33) && 33 <= y) && y <= 33)) || (((28 <= y && y <= 28) && 72 <= x) && x <= 72)) || (((30 <= y && x <= 30) && 30 <= x) && y <= 30)) || (((56 <= x && x <= 56) && y <= 44) && 44 <= y)) || (((y <= 40 && x <= 60) && 60 <= x) && 40 <= y)) || (((2 <= y && y <= 2) && 98 <= x) && x <= 98)) || (((62 <= x && 38 <= y) && x <= 62) && y <= 38)) || (((x <= 92 && 92 <= x) && 8 <= y) && y <= 8)) || (((y <= 0 && 100 <= x) && 0 <= y) && x <= 100)) || (((y <= 4 && x <= 96) && 96 <= x) && 4 <= y)) || (((23 <= y && 23 <= x) && y <= 23) && x <= 23)) || (((45 <= y && 55 <= x) && y <= 45) && x <= 55)) || (((y <= 40 && 40 <= x) && x <= 40) && 40 <= y)) || (((x <= 49 && 49 <= x) && 49 <= y) && y <= 49)) || (((x <= 25 && 25 <= x) && 25 <= y) && y <= 25)) || (((x <= 57 && 43 <= y) && 57 <= x) && y <= 43)) || (((44 <= y && y <= 44) && 44 <= x) && x <= 44) - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. SAFE Result, 150.0s OverallTime, 56 OverallIterations, 103 TraceHistogramMax, 38.3s AutomataDifference, 0.0s DeadEndRemovalTime, 39.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 1206 SDtfs, 1491 SDslu, 23283 SDs, 0 SdLazy, 17811 SolverSat, 1280 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12412 GetRequests, 10516 SyntacticMatches, 2 SemanticMatches, 1894 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16065 ImplicationChecksByTransitivity, 50.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5563occurred in iteration=55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 11.2s AutomataMinimizationTime, 56 MinimizatonAttempts, 4466 StatesRemovedByMinimization, 52 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 106 NumberOfFragments, 1316 HoareAnnotationTreeSize, 3 FomulaSimplifications, 12849365 FormulaSimplificationTreeSizeReduction, 9.6s HoareSimplificationTime, 3 FomulaSimplificationsInter, 6732176 FormulaSimplificationTreeSizeReductionInter, 30.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 4.4s SatisfiabilityAnalysisTime, 51.2s InterpolantComputationTime, 21441 NumberOfCodeBlocks, 21257 NumberOfCodeBlocksAsserted, 1282 NumberOfCheckSat, 21333 ConstructedInterpolants, 0 QuantifiedInterpolants, 13366585 SizeOfPredicates, 54 NumberOfNonLiveVariables, 20736 ConjunctsInSsa, 1727 ConjunctsInUnsatCore, 108 InterpolantComputations, 4 PerfectInterpolantSequences, 480174/690756 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...