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-invgen/seq_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 11:57:30,287 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 11:57:30,289 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 11:57:30,301 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 11:57:30,301 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 11:57:30,303 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 11:57:30,304 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 11:57:30,306 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 11:57:30,307 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 11:57:30,308 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 11:57:30,309 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 11:57:30,309 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 11:57:30,310 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 11:57:30,311 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 11:57:30,312 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 11:57:30,313 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 11:57:30,314 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 11:57:30,316 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 11:57:30,317 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 11:57:30,319 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 11:57:30,320 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 11:57:30,321 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 11:57:30,324 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 11:57:30,335 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 11:57:30,356 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 11:57:30,356 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 11:57:30,357 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 11:57:30,357 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 11:57:30,358 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 11:57:30,358 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 11:57:30,358 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 11:57:30,359 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 11:57:30,359 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 11:57:30,359 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 11:57:30,359 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 11:57:30,359 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 11:57:30,359 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 11:57:30,360 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 11:57:30,360 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 11:57:30,360 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 11:57:30,360 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 11:57:30,360 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 11:57:30,361 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 11:57:30,361 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:57:30,361 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 11:57:30,361 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 11:57:30,361 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 11:57:30,362 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 11:57:30,362 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 11:57:30,362 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 11:57:30,362 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 11:57:30,362 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 11:57:30,409 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 11:57:30,423 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 11:57:30,427 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 11:57:30,428 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 11:57:30,428 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 11:57:30,429 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/seq_true-unreach-call_true-termination.i [2018-10-24 11:57:30,484 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b011baa29/a83dbd83f7f945c187b02a61610b4397/FLAG09f136f25 [2018-10-24 11:57:30,903 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 11:57:30,904 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq_true-unreach-call_true-termination.i [2018-10-24 11:57:30,911 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b011baa29/a83dbd83f7f945c187b02a61610b4397/FLAG09f136f25 [2018-10-24 11:57:30,926 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b011baa29/a83dbd83f7f945c187b02a61610b4397 [2018-10-24 11:57:30,937 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 11:57:30,939 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 11:57:30,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 11:57:30,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 11:57:30,944 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 11:57:30,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:57:30" (1/1) ... [2018-10-24 11:57:30,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27538c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:57:30, skipping insertion in model container [2018-10-24 11:57:30,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:57:30" (1/1) ... [2018-10-24 11:57:30,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 11:57:30,989 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 11:57:31,214 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:57:31,221 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 11:57:31,246 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:57:31,268 INFO L193 MainTranslator]: Completed translation [2018-10-24 11:57:31,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:57:31 WrapperNode [2018-10-24 11:57:31,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 11:57:31,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 11:57:31,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 11:57:31,270 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 11:57:31,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:57:31" (1/1) ... [2018-10-24 11:57:31,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:57:31" (1/1) ... [2018-10-24 11:57:31,300 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 11:57:31,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 11:57:31,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 11:57:31,301 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 11:57:31,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:57:31" (1/1) ... [2018-10-24 11:57:31,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:57:31" (1/1) ... [2018-10-24 11:57:31,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:57:31" (1/1) ... [2018-10-24 11:57:31,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:57:31" (1/1) ... [2018-10-24 11:57:31,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:57:31" (1/1) ... [2018-10-24 11:57:31,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:57:31" (1/1) ... [2018-10-24 11:57:31,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:57:31" (1/1) ... [2018-10-24 11:57:31,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 11:57:31,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 11:57:31,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 11:57:31,325 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 11:57:31,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:57:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:57:31,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 11:57:31,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 11:57:31,742 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 11:57:31,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:57:31 BoogieIcfgContainer [2018-10-24 11:57:31,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 11:57:31,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 11:57:31,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 11:57:31,748 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 11:57:31,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:57:30" (1/3) ... [2018-10-24 11:57:31,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bae6e37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:57:31, skipping insertion in model container [2018-10-24 11:57:31,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:57:31" (2/3) ... [2018-10-24 11:57:31,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bae6e37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:57:31, skipping insertion in model container [2018-10-24 11:57:31,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:57:31" (3/3) ... [2018-10-24 11:57:31,759 INFO L112 eAbstractionObserver]: Analyzing ICFG seq_true-unreach-call_true-termination.i [2018-10-24 11:57:31,772 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 11:57:31,783 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 11:57:31,806 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 11:57:31,852 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 11:57:31,853 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 11:57:31,853 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 11:57:31,853 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 11:57:31,854 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 11:57:31,854 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 11:57:31,854 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 11:57:31,854 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 11:57:31,854 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 11:57:31,872 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-24 11:57:31,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-24 11:57:31,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:31,896 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:31,899 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:31,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:31,913 INFO L82 PathProgramCache]: Analyzing trace with hash 421693396, now seen corresponding path program 1 times [2018-10-24 11:57:31,916 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:31,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:31,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:31,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:31,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:32,035 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:57:32,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 11:57:32,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 11:57:32,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 11:57:32,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:57:32,055 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-10-24 11:57:32,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:32,072 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2018-10-24 11:57:32,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 11:57:32,074 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-10-24 11:57:32,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:32,085 INFO L225 Difference]: With dead ends: 32 [2018-10-24 11:57:32,085 INFO L226 Difference]: Without dead ends: 16 [2018-10-24 11:57:32,089 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 [2018-10-24 11:57:32,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-24 11:57:32,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-24 11:57:32,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-24 11:57:32,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-24 11:57:32,127 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2018-10-24 11:57:32,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:32,128 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-24 11:57:32,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 11:57:32,128 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-24 11:57:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-24 11:57:32,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:32,129 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:32,130 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:32,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:32,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1032572958, now seen corresponding path program 1 times [2018-10-24 11:57:32,130 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:32,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:32,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:32,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:32,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:32,482 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:57:32,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-24 11:57:32,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 11:57:32,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 11:57:32,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:57:32,485 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2018-10-24 11:57:32,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:32,943 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2018-10-24 11:57:32,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 11:57:32,944 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-10-24 11:57:32,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:32,945 INFO L225 Difference]: With dead ends: 39 [2018-10-24 11:57:32,945 INFO L226 Difference]: Without dead ends: 30 [2018-10-24 11:57:32,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:57:32,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-24 11:57:32,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2018-10-24 11:57:32,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-24 11:57:32,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2018-10-24 11:57:32,953 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2018-10-24 11:57:32,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:32,953 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2018-10-24 11:57:32,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 11:57:32,954 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2018-10-24 11:57:32,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-24 11:57:32,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:32,955 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:32,956 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:32,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:32,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1225079528, now seen corresponding path program 1 times [2018-10-24 11:57:32,957 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:32,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:32,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:32,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:32,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:33,038 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:57:33,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 11:57:33,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 11:57:33,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 11:57:33,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:57:33,043 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2018-10-24 11:57:33,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:33,140 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-10-24 11:57:33,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 11:57:33,143 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-10-24 11:57:33,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:33,145 INFO L225 Difference]: With dead ends: 33 [2018-10-24 11:57:33,145 INFO L226 Difference]: Without dead ends: 31 [2018-10-24 11:57:33,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:57:33,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-24 11:57:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-10-24 11:57:33,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-24 11:57:33,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2018-10-24 11:57:33,155 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2018-10-24 11:57:33,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:33,156 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2018-10-24 11:57:33,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 11:57:33,156 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2018-10-24 11:57:33,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 11:57:33,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:33,158 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:33,158 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:33,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:33,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1940651039, now seen corresponding path program 1 times [2018-10-24 11:57:33,159 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:33,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:33,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:33,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:33,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:33,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:33,458 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:33,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:33,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:33,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:33,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-10-24 11:57:33,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-24 11:57:33,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-24 11:57:33,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:57:33,800 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 14 states. [2018-10-24 11:57:34,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:34,385 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-10-24 11:57:34,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 11:57:34,386 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2018-10-24 11:57:34,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:34,387 INFO L225 Difference]: With dead ends: 51 [2018-10-24 11:57:34,388 INFO L226 Difference]: Without dead ends: 38 [2018-10-24 11:57:34,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:57:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-24 11:57:34,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2018-10-24 11:57:34,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-24 11:57:34,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2018-10-24 11:57:34,394 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2018-10-24 11:57:34,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:34,395 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2018-10-24 11:57:34,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-24 11:57:34,395 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2018-10-24 11:57:34,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 11:57:34,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:34,396 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:34,397 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:34,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:34,397 INFO L82 PathProgramCache]: Analyzing trace with hash -816692883, now seen corresponding path program 1 times [2018-10-24 11:57:34,397 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:34,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:34,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:34,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:34,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:34,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:34,518 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:34,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:34,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:34,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:34,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-10-24 11:57:34,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 11:57:34,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 11:57:34,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:57:34,704 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 13 states. [2018-10-24 11:57:35,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:35,081 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-10-24 11:57:35,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 11:57:35,081 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2018-10-24 11:57:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:35,083 INFO L225 Difference]: With dead ends: 68 [2018-10-24 11:57:35,083 INFO L226 Difference]: Without dead ends: 55 [2018-10-24 11:57:35,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:57:35,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-24 11:57:35,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 29. [2018-10-24 11:57:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-24 11:57:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2018-10-24 11:57:35,090 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2018-10-24 11:57:35,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:35,090 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2018-10-24 11:57:35,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 11:57:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2018-10-24 11:57:35,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-24 11:57:35,092 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:35,092 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:35,092 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:35,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:35,093 INFO L82 PathProgramCache]: Analyzing trace with hash -728640165, now seen corresponding path program 2 times [2018-10-24 11:57:35,093 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:35,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:35,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:35,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:35,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:35,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:35,451 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:35,467 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:57:35,505 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:57:35,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:35,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:35,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:35,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-10-24 11:57:35,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 11:57:35,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 11:57:35,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:57:35,669 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2018-10-24 11:57:35,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:35,809 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-10-24 11:57:35,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 11:57:35,810 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-10-24 11:57:35,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:35,811 INFO L225 Difference]: With dead ends: 42 [2018-10-24 11:57:35,811 INFO L226 Difference]: Without dead ends: 40 [2018-10-24 11:57:35,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:57:35,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-24 11:57:35,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2018-10-24 11:57:35,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-24 11:57:35,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2018-10-24 11:57:35,819 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2018-10-24 11:57:35,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:35,819 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2018-10-24 11:57:35,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 11:57:35,819 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2018-10-24 11:57:35,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-24 11:57:35,820 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:35,821 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:35,821 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:35,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:35,821 INFO L82 PathProgramCache]: Analyzing trace with hash -342672732, now seen corresponding path program 3 times [2018-10-24 11:57:35,821 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:35,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:35,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:35,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:35,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:35,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:35,988 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:35,995 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:57:36,016 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-24 11:57:36,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:36,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:36,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:36,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2018-10-24 11:57:36,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-24 11:57:36,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-24 11:57:36,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:57:36,285 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 18 states. [2018-10-24 11:57:36,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:36,559 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2018-10-24 11:57:36,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 11:57:36,559 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2018-10-24 11:57:36,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:36,561 INFO L225 Difference]: With dead ends: 70 [2018-10-24 11:57:36,561 INFO L226 Difference]: Without dead ends: 53 [2018-10-24 11:57:36,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:57:36,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-24 11:57:36,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2018-10-24 11:57:36,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-24 11:57:36,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2018-10-24 11:57:36,569 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2018-10-24 11:57:36,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:36,569 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2018-10-24 11:57:36,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-24 11:57:36,569 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2018-10-24 11:57:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-24 11:57:36,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:36,570 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:36,571 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:36,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:36,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1108877104, now seen corresponding path program 1 times [2018-10-24 11:57:36,571 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:36,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:36,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:36,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:36,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:36,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:36,699 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:36,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:36,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:36,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:36,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2018-10-24 11:57:36,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-24 11:57:36,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-24 11:57:36,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2018-10-24 11:57:36,892 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 17 states. [2018-10-24 11:57:37,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:37,240 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2018-10-24 11:57:37,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 11:57:37,240 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2018-10-24 11:57:37,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:37,241 INFO L225 Difference]: With dead ends: 88 [2018-10-24 11:57:37,241 INFO L226 Difference]: Without dead ends: 71 [2018-10-24 11:57:37,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2018-10-24 11:57:37,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-24 11:57:37,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 35. [2018-10-24 11:57:37,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-24 11:57:37,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2018-10-24 11:57:37,250 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2018-10-24 11:57:37,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:37,251 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2018-10-24 11:57:37,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-24 11:57:37,251 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2018-10-24 11:57:37,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-24 11:57:37,252 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:37,252 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:37,252 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:37,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:37,253 INFO L82 PathProgramCache]: Analyzing trace with hash 962901692, now seen corresponding path program 2 times [2018-10-24 11:57:37,253 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:37,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:37,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:37,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:37,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:37,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:37,384 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:37,399 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:57:37,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:57:37,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:37,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:37,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:37,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-10-24 11:57:37,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 11:57:37,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 11:57:37,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:57:37,582 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 16 states. [2018-10-24 11:57:37,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:37,930 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2018-10-24 11:57:37,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 11:57:37,931 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2018-10-24 11:57:37,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:37,932 INFO L225 Difference]: With dead ends: 109 [2018-10-24 11:57:37,932 INFO L226 Difference]: Without dead ends: 92 [2018-10-24 11:57:37,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:57:37,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-24 11:57:37,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 38. [2018-10-24 11:57:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-24 11:57:37,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2018-10-24 11:57:37,942 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 26 [2018-10-24 11:57:37,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:37,943 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2018-10-24 11:57:37,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 11:57:37,943 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2018-10-24 11:57:37,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-24 11:57:37,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:37,946 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:37,946 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:37,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:37,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2116585630, now seen corresponding path program 4 times [2018-10-24 11:57:37,946 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:37,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:37,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:37,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:37,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:38,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:38,079 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 [2018-10-24 11:57:38,087 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:57:38,103 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:57:38,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:38,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:38,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:38,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-24 11:57:38,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 11:57:38,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 11:57:38,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:57:38,148 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 9 states. [2018-10-24 11:57:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:38,370 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-10-24 11:57:38,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 11:57:38,371 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-10-24 11:57:38,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:38,372 INFO L225 Difference]: With dead ends: 51 [2018-10-24 11:57:38,372 INFO L226 Difference]: Without dead ends: 49 [2018-10-24 11:57:38,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:57:38,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-24 11:57:38,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2018-10-24 11:57:38,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-24 11:57:38,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2018-10-24 11:57:38,382 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 28 [2018-10-24 11:57:38,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:38,383 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2018-10-24 11:57:38,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 11:57:38,383 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2018-10-24 11:57:38,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-24 11:57:38,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:38,384 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:38,384 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:38,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:38,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1203202969, now seen corresponding path program 5 times [2018-10-24 11:57:38,385 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:38,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:38,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:38,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:38,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:38,569 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:38,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:38,570 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 [2018-10-24 11:57:38,578 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:57:38,599 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-24 11:57:38,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:38,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:38,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:38,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2018-10-24 11:57:38,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-24 11:57:38,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-24 11:57:38,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:57:38,820 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 22 states. [2018-10-24 11:57:39,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:39,431 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2018-10-24 11:57:39,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 11:57:39,431 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2018-10-24 11:57:39,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:39,432 INFO L225 Difference]: With dead ends: 89 [2018-10-24 11:57:39,432 INFO L226 Difference]: Without dead ends: 68 [2018-10-24 11:57:39,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2018-10-24 11:57:39,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-24 11:57:39,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 44. [2018-10-24 11:57:39,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-24 11:57:39,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-10-24 11:57:39,444 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 32 [2018-10-24 11:57:39,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:39,444 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-10-24 11:57:39,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-24 11:57:39,444 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-10-24 11:57:39,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-24 11:57:39,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:39,445 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:39,446 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:39,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:39,446 INFO L82 PathProgramCache]: Analyzing trace with hash 377151475, now seen corresponding path program 2 times [2018-10-24 11:57:39,446 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:39,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:39,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:39,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:39,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:39,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:39,632 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 [2018-10-24 11:57:39,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:57:39,682 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:57:39,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:39,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:40,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:40,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2018-10-24 11:57:40,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-24 11:57:40,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-24 11:57:40,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2018-10-24 11:57:40,166 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 21 states. [2018-10-24 11:57:40,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:40,732 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2018-10-24 11:57:40,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-24 11:57:40,732 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2018-10-24 11:57:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:40,733 INFO L225 Difference]: With dead ends: 113 [2018-10-24 11:57:40,733 INFO L226 Difference]: Without dead ends: 92 [2018-10-24 11:57:40,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:57:40,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-24 11:57:40,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 44. [2018-10-24 11:57:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-24 11:57:40,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-10-24 11:57:40,746 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 32 [2018-10-24 11:57:40,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:40,747 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-10-24 11:57:40,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-24 11:57:40,747 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-10-24 11:57:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-24 11:57:40,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:40,748 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:40,748 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:40,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:40,749 INFO L82 PathProgramCache]: Analyzing trace with hash 530751103, now seen corresponding path program 3 times [2018-10-24 11:57:40,749 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:40,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:40,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:40,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:40,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:40,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:40,908 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 [2018-10-24 11:57:40,916 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:57:40,935 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-24 11:57:40,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:40,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:41,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:41,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2018-10-24 11:57:41,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-24 11:57:41,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-24 11:57:41,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:57:41,084 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 20 states. [2018-10-24 11:57:41,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:41,425 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2018-10-24 11:57:41,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 11:57:41,425 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2018-10-24 11:57:41,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:41,426 INFO L225 Difference]: With dead ends: 135 [2018-10-24 11:57:41,426 INFO L226 Difference]: Without dead ends: 114 [2018-10-24 11:57:41,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:57:41,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-24 11:57:41,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 44. [2018-10-24 11:57:41,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-24 11:57:41,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-10-24 11:57:41,438 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 32 [2018-10-24 11:57:41,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:41,439 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-10-24 11:57:41,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-24 11:57:41,439 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-10-24 11:57:41,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-24 11:57:41,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:41,440 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:41,440 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:41,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:41,441 INFO L82 PathProgramCache]: Analyzing trace with hash -394227701, now seen corresponding path program 3 times [2018-10-24 11:57:41,441 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:41,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:41,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:41,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:41,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:41,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:41,592 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-24 11:57:41,599 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:57:41,615 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-24 11:57:41,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:41,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:41,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:41,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-10-24 11:57:41,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-24 11:57:41,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-24 11:57:41,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-10-24 11:57:41,770 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 19 states. [2018-10-24 11:57:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:42,275 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2018-10-24 11:57:42,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 11:57:42,275 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2018-10-24 11:57:42,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:42,276 INFO L225 Difference]: With dead ends: 160 [2018-10-24 11:57:42,276 INFO L226 Difference]: Without dead ends: 139 [2018-10-24 11:57:42,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2018-10-24 11:57:42,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-24 11:57:42,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 47. [2018-10-24 11:57:42,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-24 11:57:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2018-10-24 11:57:42,287 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 32 [2018-10-24 11:57:42,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:42,287 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2018-10-24 11:57:42,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-24 11:57:42,288 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2018-10-24 11:57:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-24 11:57:42,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:42,289 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:42,289 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:42,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:42,289 INFO L82 PathProgramCache]: Analyzing trace with hash 801504993, now seen corresponding path program 6 times [2018-10-24 11:57:42,289 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:42,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:42,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:42,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:42,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:42,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:42,549 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 [2018-10-24 11:57:42,564 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:57:42,638 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-24 11:57:42,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:42,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:42,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:42,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-10-24 11:57:42,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 11:57:42,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 11:57:42,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:57:42,804 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 10 states. [2018-10-24 11:57:42,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:42,979 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2018-10-24 11:57:42,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 11:57:42,979 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-10-24 11:57:42,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:42,980 INFO L225 Difference]: With dead ends: 60 [2018-10-24 11:57:42,980 INFO L226 Difference]: Without dead ends: 58 [2018-10-24 11:57:42,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:57:42,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-24 11:57:42,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2018-10-24 11:57:42,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-24 11:57:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2018-10-24 11:57:42,997 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 34 [2018-10-24 11:57:42,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:42,997 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2018-10-24 11:57:42,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 11:57:42,998 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2018-10-24 11:57:42,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-24 11:57:42,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:42,999 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:42,999 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:42,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:42,999 INFO L82 PathProgramCache]: Analyzing trace with hash -706006742, now seen corresponding path program 7 times [2018-10-24 11:57:42,999 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:42,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:43,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:43,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:43,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:43,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:43,332 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 [2018-10-24 11:57:43,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:43,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:43,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:43,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2018-10-24 11:57:43,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-24 11:57:43,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-24 11:57:43,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:57:43,615 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 26 states. [2018-10-24 11:57:43,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:43,863 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2018-10-24 11:57:43,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 11:57:43,863 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 38 [2018-10-24 11:57:43,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:43,864 INFO L225 Difference]: With dead ends: 108 [2018-10-24 11:57:43,864 INFO L226 Difference]: Without dead ends: 83 [2018-10-24 11:57:43,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2018-10-24 11:57:43,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-24 11:57:43,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 53. [2018-10-24 11:57:43,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-24 11:57:43,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2018-10-24 11:57:43,879 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2018-10-24 11:57:43,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:43,880 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2018-10-24 11:57:43,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-24 11:57:43,880 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2018-10-24 11:57:43,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-24 11:57:43,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:43,881 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:43,881 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:43,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:43,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1478384714, now seen corresponding path program 4 times [2018-10-24 11:57:43,881 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:43,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:43,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:43,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:43,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:44,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:44,033 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 [2018-10-24 11:57:44,040 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:57:44,057 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:57:44,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:44,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:44,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:44,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2018-10-24 11:57:44,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-24 11:57:44,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-24 11:57:44,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2018-10-24 11:57:44,299 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 25 states. [2018-10-24 11:57:44,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:44,629 INFO L93 Difference]: Finished difference Result 138 states and 147 transitions. [2018-10-24 11:57:44,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 11:57:44,629 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2018-10-24 11:57:44,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:44,630 INFO L225 Difference]: With dead ends: 138 [2018-10-24 11:57:44,630 INFO L226 Difference]: Without dead ends: 113 [2018-10-24 11:57:44,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=1289, Unknown=0, NotChecked=0, Total=1640 [2018-10-24 11:57:44,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-24 11:57:44,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 53. [2018-10-24 11:57:44,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-24 11:57:44,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2018-10-24 11:57:44,645 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2018-10-24 11:57:44,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:44,646 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2018-10-24 11:57:44,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-24 11:57:44,646 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2018-10-24 11:57:44,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-24 11:57:44,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:44,647 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:44,647 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:44,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:44,647 INFO L82 PathProgramCache]: Analyzing trace with hash -978630334, now seen corresponding path program 5 times [2018-10-24 11:57:44,647 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:44,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:44,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:44,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:44,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:44,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:44,890 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 [2018-10-24 11:57:44,896 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:57:44,911 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-24 11:57:44,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:44,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:45,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:45,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2018-10-24 11:57:45,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-24 11:57:45,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-24 11:57:45,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:57:45,127 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 24 states. [2018-10-24 11:57:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:45,896 INFO L93 Difference]: Finished difference Result 166 states and 176 transitions. [2018-10-24 11:57:45,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-24 11:57:45,897 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 38 [2018-10-24 11:57:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:45,898 INFO L225 Difference]: With dead ends: 166 [2018-10-24 11:57:45,898 INFO L226 Difference]: Without dead ends: 141 [2018-10-24 11:57:45,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=364, Invalid=1358, Unknown=0, NotChecked=0, Total=1722 [2018-10-24 11:57:45,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-24 11:57:45,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 53. [2018-10-24 11:57:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-24 11:57:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2018-10-24 11:57:45,914 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2018-10-24 11:57:45,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:45,915 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2018-10-24 11:57:45,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-24 11:57:45,915 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2018-10-24 11:57:45,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-24 11:57:45,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:45,916 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:45,916 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:45,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:45,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1618534862, now seen corresponding path program 6 times [2018-10-24 11:57:45,916 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:45,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:45,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:45,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:45,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:46,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:46,099 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 [2018-10-24 11:57:46,108 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:57:46,128 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-24 11:57:46,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:46,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:46,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:46,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2018-10-24 11:57:46,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-24 11:57:46,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-24 11:57:46,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2018-10-24 11:57:46,369 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 23 states. [2018-10-24 11:57:46,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:46,852 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2018-10-24 11:57:46,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-24 11:57:46,852 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2018-10-24 11:57:46,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:46,853 INFO L225 Difference]: With dead ends: 192 [2018-10-24 11:57:46,853 INFO L226 Difference]: Without dead ends: 167 [2018-10-24 11:57:46,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=1289, Unknown=0, NotChecked=0, Total=1640 [2018-10-24 11:57:46,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-24 11:57:46,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 53. [2018-10-24 11:57:46,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-24 11:57:46,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2018-10-24 11:57:46,868 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2018-10-24 11:57:46,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:46,868 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2018-10-24 11:57:46,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-24 11:57:46,868 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2018-10-24 11:57:46,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-24 11:57:46,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:46,869 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:46,869 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:46,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:46,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1096077990, now seen corresponding path program 4 times [2018-10-24 11:57:46,869 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:46,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:46,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:46,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:46,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:47,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:47,408 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 [2018-10-24 11:57:47,419 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:57:47,435 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:57:47,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:47,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:47,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:47,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2018-10-24 11:57:47,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-24 11:57:47,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-24 11:57:47,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:57:47,617 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 22 states. [2018-10-24 11:57:48,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:48,075 INFO L93 Difference]: Finished difference Result 221 states and 234 transitions. [2018-10-24 11:57:48,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-24 11:57:48,076 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2018-10-24 11:57:48,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:48,077 INFO L225 Difference]: With dead ends: 221 [2018-10-24 11:57:48,077 INFO L226 Difference]: Without dead ends: 196 [2018-10-24 11:57:48,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2018-10-24 11:57:48,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-24 11:57:48,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 56. [2018-10-24 11:57:48,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-24 11:57:48,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2018-10-24 11:57:48,092 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 38 [2018-10-24 11:57:48,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:48,092 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2018-10-24 11:57:48,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-24 11:57:48,092 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2018-10-24 11:57:48,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-24 11:57:48,092 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:48,093 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:48,093 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:48,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:48,093 INFO L82 PathProgramCache]: Analyzing trace with hash -2048305116, now seen corresponding path program 8 times [2018-10-24 11:57:48,093 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:48,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:48,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:48,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:48,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:48,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:48,313 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 [2018-10-24 11:57:48,320 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:57:48,350 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:57:48,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:48,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:48,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:48,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-24 11:57:48,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 11:57:48,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 11:57:48,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:57:48,435 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 11 states. [2018-10-24 11:57:48,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:48,579 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2018-10-24 11:57:48,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 11:57:48,579 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2018-10-24 11:57:48,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:48,580 INFO L225 Difference]: With dead ends: 69 [2018-10-24 11:57:48,580 INFO L226 Difference]: Without dead ends: 67 [2018-10-24 11:57:48,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:57:48,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-24 11:57:48,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2018-10-24 11:57:48,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-24 11:57:48,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2018-10-24 11:57:48,602 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 40 [2018-10-24 11:57:48,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:48,603 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2018-10-24 11:57:48,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 11:57:48,603 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2018-10-24 11:57:48,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-24 11:57:48,603 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:48,604 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:48,604 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:48,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:48,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1282027757, now seen corresponding path program 9 times [2018-10-24 11:57:48,604 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:48,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:48,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:48,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:48,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:48,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:48,781 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 [2018-10-24 11:57:48,792 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:57:48,814 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-24 11:57:48,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:48,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:49,030 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:49,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:49,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2018-10-24 11:57:49,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-24 11:57:49,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-24 11:57:49,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2018-10-24 11:57:49,051 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 30 states. [2018-10-24 11:57:49,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:49,420 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2018-10-24 11:57:49,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-24 11:57:49,421 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 44 [2018-10-24 11:57:49,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:49,422 INFO L225 Difference]: With dead ends: 127 [2018-10-24 11:57:49,422 INFO L226 Difference]: Without dead ends: 98 [2018-10-24 11:57:49,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1483, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 11:57:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-24 11:57:49,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 62. [2018-10-24 11:57:49,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-24 11:57:49,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-10-24 11:57:49,441 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-10-24 11:57:49,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:49,442 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-10-24 11:57:49,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-24 11:57:49,442 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-10-24 11:57:49,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-24 11:57:49,442 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:49,442 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:49,442 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:49,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:49,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1037333895, now seen corresponding path program 7 times [2018-10-24 11:57:49,443 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:49,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:49,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:49,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:49,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:50,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:50,532 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 [2018-10-24 11:57:50,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:50,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:50,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:50,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2018-10-24 11:57:50,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-24 11:57:50,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-24 11:57:50,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2018-10-24 11:57:50,889 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 29 states. [2018-10-24 11:57:51,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:51,377 INFO L93 Difference]: Finished difference Result 163 states and 173 transitions. [2018-10-24 11:57:51,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-24 11:57:51,377 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 44 [2018-10-24 11:57:51,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:51,378 INFO L225 Difference]: With dead ends: 163 [2018-10-24 11:57:51,378 INFO L226 Difference]: Without dead ends: 134 [2018-10-24 11:57:51,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=465, Invalid=1791, Unknown=0, NotChecked=0, Total=2256 [2018-10-24 11:57:51,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-24 11:57:51,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 62. [2018-10-24 11:57:51,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-24 11:57:51,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-10-24 11:57:51,407 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-10-24 11:57:51,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:51,408 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-10-24 11:57:51,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-24 11:57:51,408 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-10-24 11:57:51,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-24 11:57:51,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:51,408 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:51,409 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:51,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:51,409 INFO L82 PathProgramCache]: Analyzing trace with hash -145893627, now seen corresponding path program 8 times [2018-10-24 11:57:51,409 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:51,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:51,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:51,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:51,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 55 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:51,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:51,630 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 [2018-10-24 11:57:51,636 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:57:51,656 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:57:51,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:51,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 55 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:52,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:52,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2018-10-24 11:57:52,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-24 11:57:52,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-24 11:57:52,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:57:52,028 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 28 states. [2018-10-24 11:57:52,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:52,551 INFO L93 Difference]: Finished difference Result 197 states and 208 transitions. [2018-10-24 11:57:52,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-24 11:57:52,551 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 44 [2018-10-24 11:57:52,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:52,552 INFO L225 Difference]: With dead ends: 197 [2018-10-24 11:57:52,552 INFO L226 Difference]: Without dead ends: 168 [2018-10-24 11:57:52,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=1954, Unknown=0, NotChecked=0, Total=2450 [2018-10-24 11:57:52,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-24 11:57:52,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 62. [2018-10-24 11:57:52,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-24 11:57:52,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-10-24 11:57:52,581 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-10-24 11:57:52,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:52,581 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-10-24 11:57:52,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-24 11:57:52,581 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-10-24 11:57:52,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-24 11:57:52,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:52,582 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:52,582 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:52,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:52,583 INFO L82 PathProgramCache]: Analyzing trace with hash 628217489, now seen corresponding path program 9 times [2018-10-24 11:57:52,583 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:52,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:52,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:52,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:52,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 55 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:52,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:52,795 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 [2018-10-24 11:57:52,806 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:57:52,829 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-24 11:57:52,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:52,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:53,074 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 55 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:53,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:53,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2018-10-24 11:57:53,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-24 11:57:53,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-24 11:57:53,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2018-10-24 11:57:53,097 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 27 states. [2018-10-24 11:57:53,580 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-24 11:57:53,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:53,896 INFO L93 Difference]: Finished difference Result 229 states and 241 transitions. [2018-10-24 11:57:53,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-24 11:57:53,896 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 44 [2018-10-24 11:57:53,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:53,897 INFO L225 Difference]: With dead ends: 229 [2018-10-24 11:57:53,897 INFO L226 Difference]: Without dead ends: 200 [2018-10-24 11:57:53,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=496, Invalid=1954, Unknown=0, NotChecked=0, Total=2450 [2018-10-24 11:57:53,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-10-24 11:57:53,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 62. [2018-10-24 11:57:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-24 11:57:53,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-10-24 11:57:53,928 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-10-24 11:57:53,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:53,929 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-10-24 11:57:53,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-24 11:57:53,929 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-10-24 11:57:53,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-24 11:57:53,929 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:53,929 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:53,930 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:53,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:53,930 INFO L82 PathProgramCache]: Analyzing trace with hash -144160483, now seen corresponding path program 10 times [2018-10-24 11:57:53,930 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:53,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:53,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:53,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:53,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:53,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:54,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:54,184 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 [2018-10-24 11:57:54,198 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:57:54,217 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:57:54,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:54,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:54,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:54,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2018-10-24 11:57:54,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-24 11:57:54,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-24 11:57:54,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:57:54,441 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 26 states. [2018-10-24 11:57:54,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:54,966 INFO L93 Difference]: Finished difference Result 259 states and 272 transitions. [2018-10-24 11:57:54,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-24 11:57:54,966 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2018-10-24 11:57:54,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:54,967 INFO L225 Difference]: With dead ends: 259 [2018-10-24 11:57:54,967 INFO L226 Difference]: Without dead ends: 230 [2018-10-24 11:57:54,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1791, Unknown=0, NotChecked=0, Total=2256 [2018-10-24 11:57:54,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-24 11:57:54,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 62. [2018-10-24 11:57:54,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-24 11:57:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-10-24 11:57:54,993 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-10-24 11:57:54,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:54,994 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-10-24 11:57:54,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-24 11:57:54,994 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-10-24 11:57:54,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-24 11:57:54,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:54,994 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:54,995 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:54,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:54,995 INFO L82 PathProgramCache]: Analyzing trace with hash 355593897, now seen corresponding path program 5 times [2018-10-24 11:57:54,995 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:54,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:54,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:54,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:54,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:55,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:55,240 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 [2018-10-24 11:57:55,248 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:57:55,267 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-24 11:57:55,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:55,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:55,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:55,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-10-24 11:57:55,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-24 11:57:55,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-24 11:57:55,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2018-10-24 11:57:55,617 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 25 states. [2018-10-24 11:57:56,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:56,131 INFO L93 Difference]: Finished difference Result 292 states and 307 transitions. [2018-10-24 11:57:56,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-24 11:57:56,131 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 44 [2018-10-24 11:57:56,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:56,132 INFO L225 Difference]: With dead ends: 292 [2018-10-24 11:57:56,132 INFO L226 Difference]: Without dead ends: 263 [2018-10-24 11:57:56,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=409, Invalid=1483, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 11:57:56,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-10-24 11:57:56,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 65. [2018-10-24 11:57:56,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-24 11:57:56,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2018-10-24 11:57:56,160 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 44 [2018-10-24 11:57:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:56,160 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2018-10-24 11:57:56,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-24 11:57:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2018-10-24 11:57:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-24 11:57:56,161 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:56,161 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:56,161 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:56,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:56,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1535751271, now seen corresponding path program 10 times [2018-10-24 11:57:56,161 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:56,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:56,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:56,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:56,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:56,296 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:56,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:56,296 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 [2018-10-24 11:57:56,304 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:57:56,325 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:57:56,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:56,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:56,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:56,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-24 11:57:56,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 11:57:56,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 11:57:56,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:57:56,380 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 12 states. [2018-10-24 11:57:56,771 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-10-24 11:57:57,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:57,844 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2018-10-24 11:57:57,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 11:57:57,845 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2018-10-24 11:57:57,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:57,845 INFO L225 Difference]: With dead ends: 78 [2018-10-24 11:57:57,845 INFO L226 Difference]: Without dead ends: 76 [2018-10-24 11:57:57,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:57:57,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-24 11:57:57,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2018-10-24 11:57:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-24 11:57:57,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2018-10-24 11:57:57,873 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 46 [2018-10-24 11:57:57,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:57,873 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2018-10-24 11:57:57,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 11:57:57,873 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2018-10-24 11:57:57,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-24 11:57:57,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:57,874 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:57,874 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:57,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:57,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1714205616, now seen corresponding path program 11 times [2018-10-24 11:57:57,874 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:57,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:57,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:57,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:57,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:58,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:58,306 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 [2018-10-24 11:57:58,314 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:57:58,336 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-24 11:57:58,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:58,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:58,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:58,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2018-10-24 11:57:58,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-24 11:57:58,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-24 11:57:58,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:57:58,744 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 34 states. [2018-10-24 11:57:59,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:59,182 INFO L93 Difference]: Finished difference Result 146 states and 156 transitions. [2018-10-24 11:57:59,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 11:57:59,183 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 50 [2018-10-24 11:57:59,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:59,183 INFO L225 Difference]: With dead ends: 146 [2018-10-24 11:57:59,183 INFO L226 Difference]: Without dead ends: 113 [2018-10-24 11:57:59,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=515, Invalid=1935, Unknown=0, NotChecked=0, Total=2450 [2018-10-24 11:57:59,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-24 11:57:59,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 71. [2018-10-24 11:57:59,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-24 11:57:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-10-24 11:57:59,218 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-10-24 11:57:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:59,218 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-10-24 11:57:59,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-24 11:57:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-10-24 11:57:59,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-24 11:57:59,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:59,219 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:59,219 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:59,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:59,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1079004100, now seen corresponding path program 11 times [2018-10-24 11:57:59,219 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:59,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:59,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:59,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:59,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:59,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:59,427 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 [2018-10-24 11:57:59,438 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:57:59,471 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-24 11:57:59,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:59,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:59,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:59,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2018-10-24 11:57:59,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-24 11:57:59,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-24 11:57:59,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2018-10-24 11:57:59,767 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 33 states. [2018-10-24 11:58:00,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:00,379 INFO L93 Difference]: Finished difference Result 188 states and 199 transitions. [2018-10-24 11:58:00,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-24 11:58:00,379 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 50 [2018-10-24 11:58:00,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:00,380 INFO L225 Difference]: With dead ends: 188 [2018-10-24 11:58:00,380 INFO L226 Difference]: Without dead ends: 155 [2018-10-24 11:58:00,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=2375, Unknown=0, NotChecked=0, Total=2970 [2018-10-24 11:58:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-24 11:58:00,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 71. [2018-10-24 11:58:00,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-24 11:58:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-10-24 11:58:00,423 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-10-24 11:58:00,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:00,423 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-10-24 11:58:00,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-24 11:58:00,423 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-10-24 11:58:00,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-24 11:58:00,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:00,424 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:00,424 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:00,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:00,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1523673032, now seen corresponding path program 12 times [2018-10-24 11:58:00,425 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:00,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:00,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:00,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:00,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:00,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:00,748 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 [2018-10-24 11:58:00,754 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:58:00,776 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-24 11:58:00,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:00,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:01,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:01,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2018-10-24 11:58:01,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-24 11:58:01,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-24 11:58:01,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2018-10-24 11:58:01,113 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 32 states. [2018-10-24 11:58:01,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:01,851 INFO L93 Difference]: Finished difference Result 228 states and 240 transitions. [2018-10-24 11:58:01,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-24 11:58:01,851 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 50 [2018-10-24 11:58:01,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:01,852 INFO L225 Difference]: With dead ends: 228 [2018-10-24 11:58:01,852 INFO L226 Difference]: Without dead ends: 195 [2018-10-24 11:58:01,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2018-10-24 11:58:01,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-24 11:58:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 71. [2018-10-24 11:58:01,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-24 11:58:01,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-10-24 11:58:01,899 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-10-24 11:58:01,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:01,899 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-10-24 11:58:01,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-24 11:58:01,899 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-10-24 11:58:01,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-24 11:58:01,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:01,900 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:01,900 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:01,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:01,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1705152084, now seen corresponding path program 13 times [2018-10-24 11:58:01,901 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:01,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:01,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:01,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:01,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 78 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:02,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:02,096 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 [2018-10-24 11:58:02,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:02,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 78 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:02,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:02,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2018-10-24 11:58:02,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-24 11:58:02,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-24 11:58:02,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2018-10-24 11:58:02,418 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 31 states. [2018-10-24 11:58:03,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:03,261 INFO L93 Difference]: Finished difference Result 266 states and 279 transitions. [2018-10-24 11:58:03,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-24 11:58:03,261 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 50 [2018-10-24 11:58:03,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:03,262 INFO L225 Difference]: With dead ends: 266 [2018-10-24 11:58:03,262 INFO L226 Difference]: Without dead ends: 233 [2018-10-24 11:58:03,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=2754, Unknown=0, NotChecked=0, Total=3422 [2018-10-24 11:58:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-10-24 11:58:03,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 71. [2018-10-24 11:58:03,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-24 11:58:03,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-10-24 11:58:03,315 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-10-24 11:58:03,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:03,316 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-10-24 11:58:03,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-24 11:58:03,316 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-10-24 11:58:03,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-24 11:58:03,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:03,316 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:03,317 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:03,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:03,317 INFO L82 PathProgramCache]: Analyzing trace with hash -614209568, now seen corresponding path program 14 times [2018-10-24 11:58:03,317 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:03,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:03,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:03,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:03,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:03,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:03,681 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 [2018-10-24 11:58:03,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:58:03,709 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:58:03,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:03,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:03,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:03,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2018-10-24 11:58:03,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-24 11:58:03,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-24 11:58:03,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2018-10-24 11:58:03,945 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 30 states. [2018-10-24 11:58:04,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:04,755 INFO L93 Difference]: Finished difference Result 302 states and 316 transitions. [2018-10-24 11:58:04,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-24 11:58:04,755 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 50 [2018-10-24 11:58:04,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:04,757 INFO L225 Difference]: With dead ends: 302 [2018-10-24 11:58:04,757 INFO L226 Difference]: Without dead ends: 269 [2018-10-24 11:58:04,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2018-10-24 11:58:04,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-10-24 11:58:04,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 71. [2018-10-24 11:58:04,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-24 11:58:04,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-10-24 11:58:04,805 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-10-24 11:58:04,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:04,805 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-10-24 11:58:04,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-24 11:58:04,805 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-10-24 11:58:04,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-24 11:58:04,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:04,806 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:04,806 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:04,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:04,807 INFO L82 PathProgramCache]: Analyzing trace with hash 277230700, now seen corresponding path program 15 times [2018-10-24 11:58:04,807 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:04,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:04,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:04,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:04,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:05,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:05,178 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 [2018-10-24 11:58:05,184 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:58:05,206 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-24 11:58:05,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:05,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:05,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:05,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2018-10-24 11:58:05,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-24 11:58:05,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-24 11:58:05,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2018-10-24 11:58:05,492 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 29 states. [2018-10-24 11:58:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:06,361 INFO L93 Difference]: Finished difference Result 336 states and 351 transitions. [2018-10-24 11:58:06,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-24 11:58:06,361 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 50 [2018-10-24 11:58:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:06,363 INFO L225 Difference]: With dead ends: 336 [2018-10-24 11:58:06,363 INFO L226 Difference]: Without dead ends: 303 [2018-10-24 11:58:06,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=595, Invalid=2375, Unknown=0, NotChecked=0, Total=2970 [2018-10-24 11:58:06,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-24 11:58:06,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 71. [2018-10-24 11:58:06,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-24 11:58:06,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-10-24 11:58:06,408 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-10-24 11:58:06,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:06,408 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-10-24 11:58:06,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-24 11:58:06,409 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-10-24 11:58:06,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-24 11:58:06,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:06,409 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:06,409 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:06,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:06,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1051341816, now seen corresponding path program 6 times [2018-10-24 11:58:06,410 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:06,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:06,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:06,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:06,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:06,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:06,594 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 [2018-10-24 11:58:06,601 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:58:06,622 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-24 11:58:06,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:06,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:06,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:06,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-10-24 11:58:06,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-24 11:58:06,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-24 11:58:06,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:58:06,817 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 28 states. [2018-10-24 11:58:07,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:07,567 INFO L93 Difference]: Finished difference Result 373 states and 390 transitions. [2018-10-24 11:58:07,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-24 11:58:07,567 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 50 [2018-10-24 11:58:07,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:07,568 INFO L225 Difference]: With dead ends: 373 [2018-10-24 11:58:07,568 INFO L226 Difference]: Without dead ends: 340 [2018-10-24 11:58:07,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=515, Invalid=1935, Unknown=0, NotChecked=0, Total=2450 [2018-10-24 11:58:07,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2018-10-24 11:58:07,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 74. [2018-10-24 11:58:07,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-24 11:58:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2018-10-24 11:58:07,613 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 50 [2018-10-24 11:58:07,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:07,613 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2018-10-24 11:58:07,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-24 11:58:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2018-10-24 11:58:07,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-24 11:58:07,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:07,613 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:07,614 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:07,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:07,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1746285482, now seen corresponding path program 12 times [2018-10-24 11:58:07,614 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:07,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:07,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:07,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:07,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:07,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:07,818 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 [2018-10-24 11:58:07,825 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:58:07,848 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-24 11:58:07,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:07,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:07,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:07,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-24 11:58:07,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 11:58:07,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 11:58:07,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:58:07,969 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 13 states. [2018-10-24 11:58:08,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:08,187 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2018-10-24 11:58:08,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 11:58:08,187 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2018-10-24 11:58:08,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:08,187 INFO L225 Difference]: With dead ends: 87 [2018-10-24 11:58:08,188 INFO L226 Difference]: Without dead ends: 85 [2018-10-24 11:58:08,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:58:08,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-24 11:58:08,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2018-10-24 11:58:08,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-24 11:58:08,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2018-10-24 11:58:08,245 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 52 [2018-10-24 11:58:08,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:08,245 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2018-10-24 11:58:08,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 11:58:08,245 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2018-10-24 11:58:08,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-24 11:58:08,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:08,246 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:08,246 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:08,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:08,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1309792627, now seen corresponding path program 13 times [2018-10-24 11:58:08,246 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:08,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:08,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:08,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:08,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:08,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:08,607 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 [2018-10-24 11:58:08,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:08,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:09,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:09,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2018-10-24 11:58:09,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-24 11:58:09,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-24 11:58:09,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1115, Unknown=0, NotChecked=0, Total=1406 [2018-10-24 11:58:09,121 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 38 states. [2018-10-24 11:58:09,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:09,843 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2018-10-24 11:58:09,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-24 11:58:09,843 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 56 [2018-10-24 11:58:09,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:09,843 INFO L225 Difference]: With dead ends: 165 [2018-10-24 11:58:09,843 INFO L226 Difference]: Without dead ends: 128 [2018-10-24 11:58:09,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=633, Invalid=2447, Unknown=0, NotChecked=0, Total=3080 [2018-10-24 11:58:09,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-24 11:58:09,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 80. [2018-10-24 11:58:09,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-24 11:58:09,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-24 11:58:09,903 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-24 11:58:09,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:09,903 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-24 11:58:09,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-24 11:58:09,903 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-24 11:58:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-24 11:58:09,904 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:09,904 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:09,904 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:09,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:09,904 INFO L82 PathProgramCache]: Analyzing trace with hash 658325759, now seen corresponding path program 16 times [2018-10-24 11:58:09,905 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:09,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:09,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:09,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:09,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:10,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:10,184 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 [2018-10-24 11:58:10,191 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:58:10,215 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:58:10,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:10,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:10,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:10,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2018-10-24 11:58:10,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-24 11:58:10,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-24 11:58:10,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1065, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 11:58:10,570 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 37 states. [2018-10-24 11:58:11,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:11,889 INFO L93 Difference]: Finished difference Result 213 states and 225 transitions. [2018-10-24 11:58:11,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-24 11:58:11,890 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 56 [2018-10-24 11:58:11,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:11,890 INFO L225 Difference]: With dead ends: 213 [2018-10-24 11:58:11,890 INFO L226 Difference]: Without dead ends: 176 [2018-10-24 11:58:11,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=741, Invalid=3041, Unknown=0, NotChecked=0, Total=3782 [2018-10-24 11:58:11,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-24 11:58:11,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 80. [2018-10-24 11:58:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-24 11:58:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-24 11:58:11,945 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-24 11:58:11,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:11,945 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-24 11:58:11,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-24 11:58:11,945 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-24 11:58:11,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-24 11:58:11,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:11,946 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:11,946 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:11,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:11,946 INFO L82 PathProgramCache]: Analyzing trace with hash 250944395, now seen corresponding path program 17 times [2018-10-24 11:58:11,946 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:11,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:11,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:11,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:11,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 105 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:12,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:12,211 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 [2018-10-24 11:58:12,221 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:58:12,246 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-24 11:58:12,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:12,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 105 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:12,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:12,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2018-10-24 11:58:12,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-24 11:58:12,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-24 11:58:12,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2018-10-24 11:58:12,575 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 36 states. [2018-10-24 11:58:13,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:13,457 INFO L93 Difference]: Finished difference Result 259 states and 272 transitions. [2018-10-24 11:58:13,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-24 11:58:13,458 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 56 [2018-10-24 11:58:13,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:13,459 INFO L225 Difference]: With dead ends: 259 [2018-10-24 11:58:13,459 INFO L226 Difference]: Without dead ends: 222 [2018-10-24 11:58:13,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=823, Invalid=3467, Unknown=0, NotChecked=0, Total=4290 [2018-10-24 11:58:13,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-24 11:58:13,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 80. [2018-10-24 11:58:13,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-24 11:58:13,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-24 11:58:13,517 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-24 11:58:13,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:13,517 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-24 11:58:13,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-24 11:58:13,517 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-24 11:58:13,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-24 11:58:13,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:13,517 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:13,518 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:13,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:13,518 INFO L82 PathProgramCache]: Analyzing trace with hash 330967319, now seen corresponding path program 18 times [2018-10-24 11:58:13,518 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:13,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:13,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:13,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:13,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:14,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:14,053 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 [2018-10-24 11:58:14,060 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:58:14,089 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-24 11:58:14,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:14,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:14,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:14,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 35 [2018-10-24 11:58:14,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-24 11:58:14,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-24 11:58:14,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 11:58:14,378 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 35 states. [2018-10-24 11:58:15,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:15,396 INFO L93 Difference]: Finished difference Result 303 states and 317 transitions. [2018-10-24 11:58:15,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-24 11:58:15,396 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 56 [2018-10-24 11:58:15,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:15,397 INFO L225 Difference]: With dead ends: 303 [2018-10-24 11:58:15,397 INFO L226 Difference]: Without dead ends: 266 [2018-10-24 11:58:15,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=867, Invalid=3689, Unknown=0, NotChecked=0, Total=4556 [2018-10-24 11:58:15,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-24 11:58:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 80. [2018-10-24 11:58:15,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-24 11:58:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-24 11:58:15,465 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-24 11:58:15,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:15,465 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-24 11:58:15,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-24 11:58:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-24 11:58:15,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-24 11:58:15,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:15,466 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:15,466 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:15,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:15,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1832724899, now seen corresponding path program 19 times [2018-10-24 11:58:15,466 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:15,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:15,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:15,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:15,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:15,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:15,680 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 [2018-10-24 11:58:15,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:15,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:15,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:15,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 34 [2018-10-24 11:58:15,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-24 11:58:15,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-24 11:58:15,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:58:15,983 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 34 states. [2018-10-24 11:58:17,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:17,074 INFO L93 Difference]: Finished difference Result 345 states and 360 transitions. [2018-10-24 11:58:17,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-24 11:58:17,074 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 56 [2018-10-24 11:58:17,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:17,075 INFO L225 Difference]: With dead ends: 345 [2018-10-24 11:58:17,075 INFO L226 Difference]: Without dead ends: 308 [2018-10-24 11:58:17,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=867, Invalid=3689, Unknown=0, NotChecked=0, Total=4556 [2018-10-24 11:58:17,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-10-24 11:58:17,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 80. [2018-10-24 11:58:17,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-24 11:58:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-24 11:58:17,166 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-24 11:58:17,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:17,166 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-24 11:58:17,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-24 11:58:17,166 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-24 11:58:17,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-24 11:58:17,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:17,167 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:17,167 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:17,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:17,168 INFO L82 PathProgramCache]: Analyzing trace with hash 140434735, now seen corresponding path program 20 times [2018-10-24 11:58:17,168 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:17,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:17,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:17,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:17,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 105 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:17,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:17,498 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 [2018-10-24 11:58:17,505 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:58:17,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:58:17,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:17,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 105 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:17,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:17,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 33 [2018-10-24 11:58:17,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-24 11:58:17,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-24 11:58:17,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2018-10-24 11:58:17,855 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 33 states. [2018-10-24 11:58:19,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:19,022 INFO L93 Difference]: Finished difference Result 385 states and 401 transitions. [2018-10-24 11:58:19,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-24 11:58:19,022 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 56 [2018-10-24 11:58:19,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:19,024 INFO L225 Difference]: With dead ends: 385 [2018-10-24 11:58:19,024 INFO L226 Difference]: Without dead ends: 348 [2018-10-24 11:58:19,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=823, Invalid=3467, Unknown=0, NotChecked=0, Total=4290 [2018-10-24 11:58:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2018-10-24 11:58:19,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 80. [2018-10-24 11:58:19,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-24 11:58:19,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-24 11:58:19,090 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-24 11:58:19,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:19,090 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-24 11:58:19,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-24 11:58:19,090 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-24 11:58:19,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-24 11:58:19,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:19,090 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:19,091 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:19,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:19,091 INFO L82 PathProgramCache]: Analyzing trace with hash 321913787, now seen corresponding path program 21 times [2018-10-24 11:58:19,091 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:19,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:19,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:19,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:19,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:19,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:19,993 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 [2018-10-24 11:58:20,000 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:58:20,028 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-24 11:58:20,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:20,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:20,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:20,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 32 [2018-10-24 11:58:20,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-24 11:58:20,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-24 11:58:20,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2018-10-24 11:58:20,421 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 32 states. [2018-10-24 11:58:21,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:21,515 INFO L93 Difference]: Finished difference Result 423 states and 440 transitions. [2018-10-24 11:58:21,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-24 11:58:21,515 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 56 [2018-10-24 11:58:21,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:21,517 INFO L225 Difference]: With dead ends: 423 [2018-10-24 11:58:21,517 INFO L226 Difference]: Without dead ends: 386 [2018-10-24 11:58:21,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=741, Invalid=3041, Unknown=0, NotChecked=0, Total=3782 [2018-10-24 11:58:21,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-24 11:58:21,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 80. [2018-10-24 11:58:21,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-24 11:58:21,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-24 11:58:21,598 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-24 11:58:21,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:21,598 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-24 11:58:21,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-24 11:58:21,599 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-24 11:58:21,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-24 11:58:21,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:21,599 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:21,599 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:21,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:21,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1997447865, now seen corresponding path program 7 times [2018-10-24 11:58:21,600 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:21,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:21,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:21,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:21,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:22,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:22,789 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 [2018-10-24 11:58:22,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:22,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:24,005 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-24 11:58:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:24,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:24,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2018-10-24 11:58:24,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-24 11:58:24,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-24 11:58:24,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2018-10-24 11:58:24,391 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 31 states. [2018-10-24 11:58:25,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:25,454 INFO L93 Difference]: Finished difference Result 464 states and 483 transitions. [2018-10-24 11:58:25,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-24 11:58:25,455 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 56 [2018-10-24 11:58:25,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:25,457 INFO L225 Difference]: With dead ends: 464 [2018-10-24 11:58:25,457 INFO L226 Difference]: Without dead ends: 427 [2018-10-24 11:58:25,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=633, Invalid=2447, Unknown=0, NotChecked=0, Total=3080 [2018-10-24 11:58:25,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-10-24 11:58:25,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 83. [2018-10-24 11:58:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-24 11:58:25,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2018-10-24 11:58:25,562 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 56 [2018-10-24 11:58:25,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:25,562 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2018-10-24 11:58:25,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-24 11:58:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2018-10-24 11:58:25,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-24 11:58:25,562 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:25,563 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:25,563 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:25,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:25,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1568011757, now seen corresponding path program 14 times [2018-10-24 11:58:25,563 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:25,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:25,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:25,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:25,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:25,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:25,823 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 [2018-10-24 11:58:25,831 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:58:25,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:58:25,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:25,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:25,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:25,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-10-24 11:58:25,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-24 11:58:25,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-24 11:58:25,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:58:25,895 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 14 states. [2018-10-24 11:58:26,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:26,187 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2018-10-24 11:58:26,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-24 11:58:26,187 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2018-10-24 11:58:26,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:26,188 INFO L225 Difference]: With dead ends: 96 [2018-10-24 11:58:26,188 INFO L226 Difference]: Without dead ends: 94 [2018-10-24 11:58:26,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:58:26,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-24 11:58:26,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2018-10-24 11:58:26,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-24 11:58:26,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2018-10-24 11:58:26,263 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 58 [2018-10-24 11:58:26,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:26,263 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2018-10-24 11:58:26,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-24 11:58:26,263 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2018-10-24 11:58:26,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-24 11:58:26,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:26,264 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:26,264 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:26,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:26,264 INFO L82 PathProgramCache]: Analyzing trace with hash 762364470, now seen corresponding path program 15 times [2018-10-24 11:58:26,264 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:26,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:26,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:26,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:26,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:26,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:26,506 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 [2018-10-24 11:58:26,514 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:58:26,545 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-24 11:58:26,545 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:26,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:26,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:26,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 42 [2018-10-24 11:58:26,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-24 11:58:26,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-24 11:58:26,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2018-10-24 11:58:26,971 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 42 states. [2018-10-24 11:58:27,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:27,782 INFO L93 Difference]: Finished difference Result 184 states and 196 transitions. [2018-10-24 11:58:27,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-24 11:58:27,782 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 62 [2018-10-24 11:58:27,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:27,783 INFO L225 Difference]: With dead ends: 184 [2018-10-24 11:58:27,783 INFO L226 Difference]: Without dead ends: 143 [2018-10-24 11:58:27,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=763, Invalid=3019, Unknown=0, NotChecked=0, Total=3782 [2018-10-24 11:58:27,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-24 11:58:27,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 89. [2018-10-24 11:58:27,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-24 11:58:27,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-24 11:58:27,913 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-24 11:58:27,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:27,913 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-24 11:58:27,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-24 11:58:27,914 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-24 11:58:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-24 11:58:27,914 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:27,914 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:27,914 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:27,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:27,915 INFO L82 PathProgramCache]: Analyzing trace with hash -904179518, now seen corresponding path program 22 times [2018-10-24 11:58:27,915 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:27,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:27,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:27,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:27,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:29,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:29,766 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 [2018-10-24 11:58:29,774 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:58:29,799 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:58:29,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:29,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:30,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:30,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 41 [2018-10-24 11:58:30,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-24 11:58:30,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-24 11:58:30,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2018-10-24 11:58:30,184 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 41 states. [2018-10-24 11:58:31,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:31,226 INFO L93 Difference]: Finished difference Result 238 states and 251 transitions. [2018-10-24 11:58:31,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-24 11:58:31,226 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 62 [2018-10-24 11:58:31,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:31,227 INFO L225 Difference]: With dead ends: 238 [2018-10-24 11:58:31,227 INFO L226 Difference]: Without dead ends: 197 [2018-10-24 11:58:31,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=903, Invalid=3789, Unknown=0, NotChecked=0, Total=4692 [2018-10-24 11:58:31,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-24 11:58:31,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 89. [2018-10-24 11:58:31,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-24 11:58:31,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-24 11:58:31,312 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-24 11:58:31,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:31,312 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-24 11:58:31,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-24 11:58:31,312 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-24 11:58:31,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-24 11:58:31,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:31,313 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:31,313 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:31,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:31,313 INFO L82 PathProgramCache]: Analyzing trace with hash -923790770, now seen corresponding path program 23 times [2018-10-24 11:58:31,313 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:31,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:31,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:31,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:31,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 136 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:31,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:31,750 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 [2018-10-24 11:58:31,757 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:58:31,784 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-24 11:58:31,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:31,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 136 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:32,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:32,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 40 [2018-10-24 11:58:32,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-24 11:58:32,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-24 11:58:32,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1257, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:58:32,152 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 40 states. [2018-10-24 11:58:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:33,413 INFO L93 Difference]: Finished difference Result 290 states and 304 transitions. [2018-10-24 11:58:33,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-24 11:58:33,413 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 62 [2018-10-24 11:58:33,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:33,415 INFO L225 Difference]: With dead ends: 290 [2018-10-24 11:58:33,415 INFO L226 Difference]: Without dead ends: 249 [2018-10-24 11:58:33,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1018, Invalid=4384, Unknown=0, NotChecked=0, Total=5402 [2018-10-24 11:58:33,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-10-24 11:58:33,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 89. [2018-10-24 11:58:33,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-24 11:58:33,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-24 11:58:33,558 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-24 11:58:33,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:33,558 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-24 11:58:33,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-24 11:58:33,558 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-24 11:58:33,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-24 11:58:33,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:33,561 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:33,562 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:33,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:33,562 INFO L82 PathProgramCache]: Analyzing trace with hash 81774298, now seen corresponding path program 24 times [2018-10-24 11:58:33,562 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:33,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:33,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:33,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:33,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:34,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:34,018 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 [2018-10-24 11:58:34,026 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:58:34,057 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-24 11:58:34,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:34,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:34,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:34,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2018-10-24 11:58:34,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-24 11:58:34,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-24 11:58:34,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2018-10-24 11:58:34,619 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 39 states. [2018-10-24 11:58:35,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:35,981 INFO L93 Difference]: Finished difference Result 340 states and 355 transitions. [2018-10-24 11:58:35,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-24 11:58:35,981 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 62 [2018-10-24 11:58:35,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:35,983 INFO L225 Difference]: With dead ends: 340 [2018-10-24 11:58:35,983 INFO L226 Difference]: Without dead ends: 299 [2018-10-24 11:58:35,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1093, Invalid=4759, Unknown=0, NotChecked=0, Total=5852 [2018-10-24 11:58:35,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-10-24 11:58:36,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 89. [2018-10-24 11:58:36,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-24 11:58:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-24 11:58:36,074 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-24 11:58:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:36,074 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-24 11:58:36,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-24 11:58:36,074 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-24 11:58:36,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-24 11:58:36,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:36,075 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:36,075 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:36,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:36,075 INFO L82 PathProgramCache]: Analyzing trace with hash -569692570, now seen corresponding path program 25 times [2018-10-24 11:58:36,076 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:36,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:36,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:36,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:36,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 136 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:36,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:36,438 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 [2018-10-24 11:58:36,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:36,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 136 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:36,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:36,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 38 [2018-10-24 11:58:36,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-24 11:58:36,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-24 11:58:36,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2018-10-24 11:58:36,791 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 38 states. [2018-10-24 11:58:38,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:38,268 INFO L93 Difference]: Finished difference Result 388 states and 404 transitions. [2018-10-24 11:58:38,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-24 11:58:38,269 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 62 [2018-10-24 11:58:38,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:38,270 INFO L225 Difference]: With dead ends: 388 [2018-10-24 11:58:38,270 INFO L226 Difference]: Without dead ends: 347 [2018-10-24 11:58:38,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1119, Invalid=4887, Unknown=0, NotChecked=0, Total=6006 [2018-10-24 11:58:38,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-10-24 11:58:38,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 89. [2018-10-24 11:58:38,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-24 11:58:38,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-24 11:58:38,366 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-24 11:58:38,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:38,366 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-24 11:58:38,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-24 11:58:38,366 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-24 11:58:38,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-24 11:58:38,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:38,366 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:38,366 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:38,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:38,367 INFO L82 PathProgramCache]: Analyzing trace with hash -977073934, now seen corresponding path program 26 times [2018-10-24 11:58:38,367 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:38,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:38,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:38,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:38,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:38,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:38,684 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 [2018-10-24 11:58:38,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:58:38,717 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:58:38,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:38,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:39,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:39,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 37 [2018-10-24 11:58:39,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-24 11:58:39,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-24 11:58:39,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 11:58:39,070 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 37 states. [2018-10-24 11:58:40,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:40,751 INFO L93 Difference]: Finished difference Result 434 states and 451 transitions. [2018-10-24 11:58:40,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-24 11:58:40,751 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 62 [2018-10-24 11:58:40,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:40,753 INFO L225 Difference]: With dead ends: 434 [2018-10-24 11:58:40,753 INFO L226 Difference]: Without dead ends: 393 [2018-10-24 11:58:40,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1093, Invalid=4759, Unknown=0, NotChecked=0, Total=5852 [2018-10-24 11:58:40,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-10-24 11:58:40,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 89. [2018-10-24 11:58:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-24 11:58:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-24 11:58:40,856 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-24 11:58:40,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:40,856 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-24 11:58:40,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-24 11:58:40,856 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-24 11:58:40,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-24 11:58:40,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:40,857 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:40,857 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:40,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:40,857 INFO L82 PathProgramCache]: Analyzing trace with hash -897051010, now seen corresponding path program 27 times [2018-10-24 11:58:40,858 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:40,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:40,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:40,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:40,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 136 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:41,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:41,093 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 [2018-10-24 11:58:41,100 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:58:41,129 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-24 11:58:41,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:41,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 136 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:41,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:41,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 36 [2018-10-24 11:58:41,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-24 11:58:41,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-24 11:58:41,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2018-10-24 11:58:41,439 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 36 states. [2018-10-24 11:58:43,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:43,043 INFO L93 Difference]: Finished difference Result 478 states and 496 transitions. [2018-10-24 11:58:43,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-24 11:58:43,043 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 62 [2018-10-24 11:58:43,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:43,045 INFO L225 Difference]: With dead ends: 478 [2018-10-24 11:58:43,045 INFO L226 Difference]: Without dead ends: 437 [2018-10-24 11:58:43,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1018, Invalid=4384, Unknown=0, NotChecked=0, Total=5402 [2018-10-24 11:58:43,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2018-10-24 11:58:43,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 89. [2018-10-24 11:58:43,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-24 11:58:43,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-24 11:58:43,141 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-24 11:58:43,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:43,141 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-24 11:58:43,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-24 11:58:43,141 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-24 11:58:43,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-24 11:58:43,142 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:43,142 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:43,142 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:43,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:43,142 INFO L82 PathProgramCache]: Analyzing trace with hash 604706570, now seen corresponding path program 28 times [2018-10-24 11:58:43,142 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:43,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:43,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:43,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:43,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:43,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:43,449 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 [2018-10-24 11:58:43,459 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:58:43,484 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:58:43,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:43,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:43,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:43,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 35 [2018-10-24 11:58:43,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-24 11:58:43,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-24 11:58:43,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 11:58:43,771 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 35 states. [2018-10-24 11:58:45,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:45,501 INFO L93 Difference]: Finished difference Result 520 states and 539 transitions. [2018-10-24 11:58:45,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-24 11:58:45,501 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 62 [2018-10-24 11:58:45,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:45,502 INFO L225 Difference]: With dead ends: 520 [2018-10-24 11:58:45,502 INFO L226 Difference]: Without dead ends: 479 [2018-10-24 11:58:45,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=903, Invalid=3789, Unknown=0, NotChecked=0, Total=4692 [2018-10-24 11:58:45,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-10-24 11:58:45,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 89. [2018-10-24 11:58:45,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-24 11:58:45,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-24 11:58:45,620 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-24 11:58:45,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:45,621 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-24 11:58:45,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-24 11:58:45,621 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-24 11:58:45,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-24 11:58:45,621 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:45,621 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:45,621 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:45,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:45,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1087583594, now seen corresponding path program 8 times [2018-10-24 11:58:45,622 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:45,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:45,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:45,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:45,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:46,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:46,053 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 [2018-10-24 11:58:46,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:58:46,086 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:58:46,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:46,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:47,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:47,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2018-10-24 11:58:47,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-24 11:58:47,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-24 11:58:47,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:58:47,617 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 34 states. [2018-10-24 11:58:49,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:49,183 INFO L93 Difference]: Finished difference Result 565 states and 586 transitions. [2018-10-24 11:58:49,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-24 11:58:49,183 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 62 [2018-10-24 11:58:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:49,186 INFO L225 Difference]: With dead ends: 565 [2018-10-24 11:58:49,186 INFO L226 Difference]: Without dead ends: 524 [2018-10-24 11:58:49,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=763, Invalid=3019, Unknown=0, NotChecked=0, Total=3782 [2018-10-24 11:58:49,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-10-24 11:58:49,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 92. [2018-10-24 11:58:49,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-24 11:58:49,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2018-10-24 11:58:49,291 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 62 [2018-10-24 11:58:49,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:49,291 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2018-10-24 11:58:49,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-24 11:58:49,291 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2018-10-24 11:58:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-24 11:58:49,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:49,292 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:49,292 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:49,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:49,292 INFO L82 PathProgramCache]: Analyzing trace with hash -2046289104, now seen corresponding path program 16 times [2018-10-24 11:58:49,292 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:49,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:49,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:49,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:49,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:49,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:49,644 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-24 11:58:49,652 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:58:49,680 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:58:49,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:49,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:49,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:49,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-24 11:58:49,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 11:58:49,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 11:58:49,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-10-24 11:58:49,731 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand 15 states. [2018-10-24 11:58:50,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:50,181 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2018-10-24 11:58:50,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-24 11:58:50,181 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2018-10-24 11:58:50,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:50,182 INFO L225 Difference]: With dead ends: 105 [2018-10-24 11:58:50,182 INFO L226 Difference]: Without dead ends: 103 [2018-10-24 11:58:50,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:58:50,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-24 11:58:50,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2018-10-24 11:58:50,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-24 11:58:50,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2018-10-24 11:58:50,301 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 64 [2018-10-24 11:58:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:50,302 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2018-10-24 11:58:50,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-24 11:58:50,302 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2018-10-24 11:58:50,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-24 11:58:50,302 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:50,302 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:50,303 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:50,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:50,303 INFO L82 PathProgramCache]: Analyzing trace with hash -904360455, now seen corresponding path program 17 times [2018-10-24 11:58:50,303 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:50,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:50,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:50,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:50,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:50,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:50,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:50,849 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:50,871 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:58:50,904 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-24 11:58:50,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:50,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:51,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:51,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2018-10-24 11:58:51,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-24 11:58:51,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-24 11:58:51,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1649, Unknown=0, NotChecked=0, Total=2070 [2018-10-24 11:58:51,480 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand 46 states. [2018-10-24 11:58:52,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:52,486 INFO L93 Difference]: Finished difference Result 203 states and 216 transitions. [2018-10-24 11:58:52,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-24 11:58:52,486 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 68 [2018-10-24 11:58:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:52,487 INFO L225 Difference]: With dead ends: 203 [2018-10-24 11:58:52,487 INFO L226 Difference]: Without dead ends: 158 [2018-10-24 11:58:52,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=3651, Unknown=0, NotChecked=0, Total=4556 [2018-10-24 11:58:52,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-24 11:58:52,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 98. [2018-10-24 11:58:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-24 11:58:52,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-24 11:58:52,632 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-24 11:58:52,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:52,632 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-24 11:58:52,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-24 11:58:52,632 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-24 11:58:52,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-24 11:58:52,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:52,633 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:52,633 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:52,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:52,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1644757893, now seen corresponding path program 29 times [2018-10-24 11:58:52,633 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:52,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:52,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:52,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:52,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 171 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:52,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:52,907 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:52,917 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:58:52,948 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-24 11:58:52,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:52,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 171 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:53,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:53,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 45 [2018-10-24 11:58:53,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-24 11:58:53,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-24 11:58:53,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2018-10-24 11:58:53,417 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 45 states. [2018-10-24 11:58:54,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:54,904 INFO L93 Difference]: Finished difference Result 263 states and 277 transitions. [2018-10-24 11:58:54,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-24 11:58:54,904 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 68 [2018-10-24 11:58:54,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:54,905 INFO L225 Difference]: With dead ends: 263 [2018-10-24 11:58:54,905 INFO L226 Difference]: Without dead ends: 218 [2018-10-24 11:58:54,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=4619, Unknown=0, NotChecked=0, Total=5700 [2018-10-24 11:58:54,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-24 11:58:55,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 98. [2018-10-24 11:58:55,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-24 11:58:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-24 11:58:55,044 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-24 11:58:55,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:55,044 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-24 11:58:55,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-24 11:58:55,045 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-24 11:58:55,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-24 11:58:55,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:55,045 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:55,045 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:55,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:55,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1920035857, now seen corresponding path program 30 times [2018-10-24 11:58:55,046 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:55,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:55,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:55,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:55,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 171 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:55,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:55,333 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:55,342 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:58:55,377 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-24 11:58:55,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:55,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 171 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:55,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:55,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 44 [2018-10-24 11:58:55,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-24 11:58:55,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-24 11:58:55,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 11:58:55,804 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 44 states. [2018-10-24 11:58:57,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:57,441 INFO L93 Difference]: Finished difference Result 321 states and 336 transitions. [2018-10-24 11:58:57,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-24 11:58:57,441 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 68 [2018-10-24 11:58:57,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:57,442 INFO L225 Difference]: With dead ends: 321 [2018-10-24 11:58:57,442 INFO L226 Difference]: Without dead ends: 276 [2018-10-24 11:58:57,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1234, Invalid=5408, Unknown=0, NotChecked=0, Total=6642 [2018-10-24 11:58:57,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-10-24 11:58:57,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 98. [2018-10-24 11:58:57,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-24 11:58:57,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-24 11:58:57,580 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-24 11:58:57,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:57,580 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-24 11:58:57,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-24 11:58:57,581 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-24 11:58:57,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-24 11:58:57,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:57,581 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 7, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:57,581 INFO L424 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:57,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:57,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1900902499, now seen corresponding path program 31 times [2018-10-24 11:58:57,582 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:57,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:57,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:57,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:57,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:57,875 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 171 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:57,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:57,875 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:57,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:57,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 171 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:58,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:58,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 43 [2018-10-24 11:58:58,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-24 11:58:58,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-24 11:58:58,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1463, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 11:58:58,328 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 43 states. [2018-10-24 11:59:00,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:00,272 INFO L93 Difference]: Finished difference Result 377 states and 393 transitions. [2018-10-24 11:59:00,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-24 11:59:00,272 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 68 [2018-10-24 11:59:00,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:00,273 INFO L225 Difference]: With dead ends: 377 [2018-10-24 11:59:00,273 INFO L226 Difference]: Without dead ends: 332 [2018-10-24 11:59:00,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2304 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1346, Invalid=5964, Unknown=0, NotChecked=0, Total=7310 [2018-10-24 11:59:00,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2018-10-24 11:59:00,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 98. [2018-10-24 11:59:00,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-24 11:59:00,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-24 11:59:00,421 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-24 11:59:00,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:00,422 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-24 11:59:00,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-24 11:59:00,422 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-24 11:59:00,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-24 11:59:00,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:00,422 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:00,422 INFO L424 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:00,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:00,423 INFO L82 PathProgramCache]: Analyzing trace with hash 727520809, now seen corresponding path program 32 times [2018-10-24 11:59:00,423 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:00,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:00,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:00,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:00,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 171 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:00,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:00,674 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:00,682 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:59:00,709 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:59:00,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:00,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 171 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:01,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:01,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 42 [2018-10-24 11:59:01,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-24 11:59:01,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-24 11:59:01,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1397, Unknown=0, NotChecked=0, Total=1722 [2018-10-24 11:59:01,133 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 42 states. [2018-10-24 11:59:03,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:03,219 INFO L93 Difference]: Finished difference Result 431 states and 448 transitions. [2018-10-24 11:59:03,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-24 11:59:03,219 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 68 [2018-10-24 11:59:03,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:03,221 INFO L225 Difference]: With dead ends: 431 [2018-10-24 11:59:03,221 INFO L226 Difference]: Without dead ends: 386 [2018-10-24 11:59:03,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2438 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1405, Invalid=6251, Unknown=0, NotChecked=0, Total=7656 [2018-10-24 11:59:03,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-24 11:59:03,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 98. [2018-10-24 11:59:03,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-24 11:59:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-24 11:59:03,367 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-24 11:59:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:03,367 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-24 11:59:03,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-24 11:59:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-24 11:59:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-24 11:59:03,368 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:03,368 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:03,368 INFO L424 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:03,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:03,368 INFO L82 PathProgramCache]: Analyzing trace with hash 707909557, now seen corresponding path program 33 times [2018-10-24 11:59:03,368 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:03,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:03,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:03,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:03,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 171 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:03,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:03,658 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:03,666 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:59:03,697 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-24 11:59:03,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:03,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 171 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:04,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:04,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 41 [2018-10-24 11:59:04,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-24 11:59:04,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-24 11:59:04,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2018-10-24 11:59:04,080 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 41 states. [2018-10-24 11:59:06,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:06,375 INFO L93 Difference]: Finished difference Result 483 states and 501 transitions. [2018-10-24 11:59:06,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-24 11:59:06,375 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 68 [2018-10-24 11:59:06,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:06,377 INFO L225 Difference]: With dead ends: 483 [2018-10-24 11:59:06,377 INFO L226 Difference]: Without dead ends: 438 [2018-10-24 11:59:06,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1405, Invalid=6251, Unknown=0, NotChecked=0, Total=7656 [2018-10-24 11:59:06,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2018-10-24 11:59:06,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 98. [2018-10-24 11:59:06,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-24 11:59:06,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-24 11:59:06,538 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-24 11:59:06,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:06,538 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-24 11:59:06,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-24 11:59:06,538 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-24 11:59:06,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-24 11:59:06,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:06,539 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 7, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:06,539 INFO L424 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:06,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:06,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1713474625, now seen corresponding path program 34 times [2018-10-24 11:59:06,540 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:06,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:06,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:06,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:06,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 171 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:06,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:06,858 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:06,866 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:59:06,894 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:59:06,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:06,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 171 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:07,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:07,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 40 [2018-10-24 11:59:07,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-24 11:59:07,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-24 11:59:07,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1259, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:59:07,251 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 40 states. [2018-10-24 11:59:09,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:09,525 INFO L93 Difference]: Finished difference Result 533 states and 552 transitions. [2018-10-24 11:59:09,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-24 11:59:09,525 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 68 [2018-10-24 11:59:09,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:09,526 INFO L225 Difference]: With dead ends: 533 [2018-10-24 11:59:09,526 INFO L226 Difference]: Without dead ends: 488 [2018-10-24 11:59:09,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2319 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1346, Invalid=5964, Unknown=0, NotChecked=0, Total=7310 [2018-10-24 11:59:09,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2018-10-24 11:59:09,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 98. [2018-10-24 11:59:09,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-24 11:59:09,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-24 11:59:09,680 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-24 11:59:09,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:09,680 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-24 11:59:09,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-24 11:59:09,680 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-24 11:59:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-24 11:59:09,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:09,681 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:09,681 INFO L424 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:09,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:09,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1062007757, now seen corresponding path program 35 times [2018-10-24 11:59:09,682 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:09,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:09,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:09,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:09,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 171 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:10,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:10,233 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:10,241 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:59:10,274 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-24 11:59:10,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:10,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 171 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:10,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:10,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 39 [2018-10-24 11:59:10,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-24 11:59:10,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-24 11:59:10,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1187, Unknown=0, NotChecked=0, Total=1482 [2018-10-24 11:59:10,639 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 39 states. [2018-10-24 11:59:13,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:13,046 INFO L93 Difference]: Finished difference Result 581 states and 601 transitions. [2018-10-24 11:59:13,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-24 11:59:13,046 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 68 [2018-10-24 11:59:13,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:13,048 INFO L225 Difference]: With dead ends: 581 [2018-10-24 11:59:13,048 INFO L226 Difference]: Without dead ends: 536 [2018-10-24 11:59:13,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1234, Invalid=5408, Unknown=0, NotChecked=0, Total=6642 [2018-10-24 11:59:13,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2018-10-24 11:59:13,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 98. [2018-10-24 11:59:13,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-24 11:59:13,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-24 11:59:13,205 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-24 11:59:13,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:13,205 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-24 11:59:13,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-24 11:59:13,206 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-24 11:59:13,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-24 11:59:13,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:13,206 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:13,206 INFO L424 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:13,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:13,207 INFO L82 PathProgramCache]: Analyzing trace with hash 654626393, now seen corresponding path program 36 times [2018-10-24 11:59:13,207 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:13,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:13,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:13,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:13,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 171 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:13,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:13,580 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:13,588 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:59:13,623 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-24 11:59:13,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:13,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 171 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:13,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:13,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 38 [2018-10-24 11:59:13,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-24 11:59:13,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-24 11:59:13,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1113, Unknown=0, NotChecked=0, Total=1406 [2018-10-24 11:59:13,975 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 38 states. [2018-10-24 11:59:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:16,364 INFO L93 Difference]: Finished difference Result 627 states and 648 transitions. [2018-10-24 11:59:16,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-24 11:59:16,364 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 68 [2018-10-24 11:59:16,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:16,366 INFO L225 Difference]: With dead ends: 627 [2018-10-24 11:59:16,366 INFO L226 Difference]: Without dead ends: 582 [2018-10-24 11:59:16,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1081, Invalid=4619, Unknown=0, NotChecked=0, Total=5700 [2018-10-24 11:59:16,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2018-10-24 11:59:16,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 98. [2018-10-24 11:59:16,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-24 11:59:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-24 11:59:16,521 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-24 11:59:16,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:16,521 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-24 11:59:16,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-24 11:59:16,521 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-24 11:59:16,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-24 11:59:16,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:16,522 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:16,522 INFO L424 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:16,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:16,523 INFO L82 PathProgramCache]: Analyzing trace with hash 734649317, now seen corresponding path program 9 times [2018-10-24 11:59:16,523 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:16,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:16,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:16,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:16,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:16,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:16,795 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:16,804 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:59:16,837 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-24 11:59:16,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:16,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:17,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:17,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-10-24 11:59:17,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-24 11:59:17,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-24 11:59:17,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1037, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 11:59:17,219 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 37 states. [2018-10-24 11:59:19,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:19,497 INFO L93 Difference]: Finished difference Result 676 states and 699 transitions. [2018-10-24 11:59:19,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-24 11:59:19,497 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 68 [2018-10-24 11:59:19,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:19,499 INFO L225 Difference]: With dead ends: 676 [2018-10-24 11:59:19,499 INFO L226 Difference]: Without dead ends: 631 [2018-10-24 11:59:19,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=905, Invalid=3651, Unknown=0, NotChecked=0, Total=4556 [2018-10-24 11:59:19,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2018-10-24 11:59:19,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 101. [2018-10-24 11:59:19,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-24 11:59:19,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2018-10-24 11:59:19,665 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 68 [2018-10-24 11:59:19,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:19,665 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2018-10-24 11:59:19,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-24 11:59:19,665 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2018-10-24 11:59:19,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-24 11:59:19,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:19,666 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:19,666 INFO L424 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:19,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:19,666 INFO L82 PathProgramCache]: Analyzing trace with hash -492584077, now seen corresponding path program 18 times [2018-10-24 11:59:19,666 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:19,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:19,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:19,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:19,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:20,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:20,658 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:20,673 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:59:20,725 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-24 11:59:20,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:20,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:20,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:20,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-24 11:59:20,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 11:59:20,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 11:59:20,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:59:20,794 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 16 states. [2018-10-24 11:59:21,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:21,282 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2018-10-24 11:59:21,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-24 11:59:21,283 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2018-10-24 11:59:21,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:21,283 INFO L225 Difference]: With dead ends: 114 [2018-10-24 11:59:21,283 INFO L226 Difference]: Without dead ends: 112 [2018-10-24 11:59:21,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=277, Invalid=479, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:59:21,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-24 11:59:21,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2018-10-24 11:59:21,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-24 11:59:21,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2018-10-24 11:59:21,445 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 70 [2018-10-24 11:59:21,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:21,445 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2018-10-24 11:59:21,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 11:59:21,445 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2018-10-24 11:59:21,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-24 11:59:21,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:21,446 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:21,446 INFO L424 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:21,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:21,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1538237252, now seen corresponding path program 19 times [2018-10-24 11:59:21,446 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:21,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:21,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:21,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:21,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:21,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:21,765 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:21,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:21,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:22,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:22,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 50 [2018-10-24 11:59:22,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-24 11:59:22,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-24 11:59:22,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=1955, Unknown=0, NotChecked=0, Total=2450 [2018-10-24 11:59:22,332 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 50 states. [2018-10-24 11:59:23,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:23,621 INFO L93 Difference]: Finished difference Result 222 states and 236 transitions. [2018-10-24 11:59:23,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-24 11:59:23,621 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 74 [2018-10-24 11:59:23,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:23,622 INFO L225 Difference]: With dead ends: 222 [2018-10-24 11:59:23,622 INFO L226 Difference]: Without dead ends: 173 [2018-10-24 11:59:23,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1059, Invalid=4343, Unknown=0, NotChecked=0, Total=5402 [2018-10-24 11:59:23,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-24 11:59:23,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 107. [2018-10-24 11:59:23,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-24 11:59:23,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-24 11:59:23,822 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-24 11:59:23,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:23,822 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-24 11:59:23,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-24 11:59:23,822 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-24 11:59:23,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-24 11:59:23,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:23,823 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:23,823 INFO L424 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:23,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:23,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1354925752, now seen corresponding path program 37 times [2018-10-24 11:59:23,823 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:23,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:23,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:23,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:23,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:24,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:24,165 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:24,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:24,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:24,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:24,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 49 [2018-10-24 11:59:24,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-24 11:59:24,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-24 11:59:24,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=1890, Unknown=0, NotChecked=0, Total=2352 [2018-10-24 11:59:24,696 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 49 states. [2018-10-24 11:59:26,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:26,571 INFO L93 Difference]: Finished difference Result 288 states and 303 transitions. [2018-10-24 11:59:26,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-24 11:59:26,571 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 74 [2018-10-24 11:59:26,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:26,572 INFO L225 Difference]: With dead ends: 288 [2018-10-24 11:59:26,572 INFO L226 Difference]: Without dead ends: 239 [2018-10-24 11:59:26,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2099 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=5531, Unknown=0, NotChecked=0, Total=6806 [2018-10-24 11:59:26,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-24 11:59:26,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 107. [2018-10-24 11:59:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-24 11:59:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-24 11:59:26,770 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-24 11:59:26,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:26,770 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-24 11:59:26,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-24 11:59:26,770 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-24 11:59:26,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-24 11:59:26,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:26,770 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:26,771 INFO L424 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:26,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:26,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1201686740, now seen corresponding path program 38 times [2018-10-24 11:59:26,771 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:26,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:26,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:26,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:26,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 210 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:27,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:27,614 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:27,621 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:59:27,652 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:59:27,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:27,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 210 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:28,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:28,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 48 [2018-10-24 11:59:28,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-24 11:59:28,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-24 11:59:28,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=1823, Unknown=0, NotChecked=0, Total=2256 [2018-10-24 11:59:28,679 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 48 states. [2018-10-24 11:59:30,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:30,977 INFO L93 Difference]: Finished difference Result 352 states and 368 transitions. [2018-10-24 11:59:30,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-24 11:59:30,978 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 74 [2018-10-24 11:59:30,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:30,979 INFO L225 Difference]: With dead ends: 352 [2018-10-24 11:59:30,979 INFO L226 Difference]: Without dead ends: 303 [2018-10-24 11:59:30,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1471, Invalid=6539, Unknown=0, NotChecked=0, Total=8010 [2018-10-24 11:59:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-24 11:59:31,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 107. [2018-10-24 11:59:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-24 11:59:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-24 11:59:31,203 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-24 11:59:31,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:31,203 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-24 11:59:31,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-24 11:59:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-24 11:59:31,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-24 11:59:31,204 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:31,204 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 8, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:31,204 INFO L424 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:31,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:31,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1521906848, now seen corresponding path program 39 times [2018-10-24 11:59:31,205 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:31,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:31,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:31,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:31,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 210 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:31,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:31,927 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:31,936 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:59:31,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-24 11:59:31,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:31,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 210 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:33,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:33,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 47 [2018-10-24 11:59:33,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-24 11:59:33,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-24 11:59:33,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1754, Unknown=0, NotChecked=0, Total=2162 [2018-10-24 11:59:33,337 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 47 states. [2018-10-24 11:59:35,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:35,916 INFO L93 Difference]: Finished difference Result 414 states and 431 transitions. [2018-10-24 11:59:35,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-24 11:59:35,916 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 74 [2018-10-24 11:59:35,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:35,917 INFO L225 Difference]: With dead ends: 414 [2018-10-24 11:59:35,917 INFO L226 Difference]: Without dead ends: 365 [2018-10-24 11:59:35,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2875 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1626, Invalid=7304, Unknown=0, NotChecked=0, Total=8930 [2018-10-24 11:59:35,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2018-10-24 11:59:36,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 107. [2018-10-24 11:59:36,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-24 11:59:36,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-24 11:59:36,131 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-24 11:59:36,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:36,131 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-24 11:59:36,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-24 11:59:36,131 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-24 11:59:36,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-24 11:59:36,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:36,132 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 7, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:36,132 INFO L424 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:36,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:36,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1027211500, now seen corresponding path program 40 times [2018-10-24 11:59:36,132 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:36,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:36,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:36,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:36,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 210 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:36,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:36,415 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:36,421 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:59:36,451 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:59:36,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:36,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 210 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:36,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:36,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 46 [2018-10-24 11:59:36,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-24 11:59:36,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-24 11:59:36,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1683, Unknown=0, NotChecked=0, Total=2070 [2018-10-24 11:59:36,990 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 46 states. [2018-10-24 11:59:39,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:39,714 INFO L93 Difference]: Finished difference Result 474 states and 492 transitions. [2018-10-24 11:59:39,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-24 11:59:39,714 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 74 [2018-10-24 11:59:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:39,716 INFO L225 Difference]: With dead ends: 474 [2018-10-24 11:59:39,716 INFO L226 Difference]: Without dead ends: 425 [2018-10-24 11:59:39,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3099 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1725, Invalid=7781, Unknown=0, NotChecked=0, Total=9506 [2018-10-24 11:59:39,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2018-10-24 11:59:39,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 107. [2018-10-24 11:59:39,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-24 11:59:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-24 11:59:39,945 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-24 11:59:39,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:39,946 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-24 11:59:39,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-24 11:59:39,946 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-24 11:59:39,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-24 11:59:39,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:39,946 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:39,946 INFO L424 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:39,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:39,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1302489464, now seen corresponding path program 41 times [2018-10-24 11:59:39,947 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:39,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:39,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:39,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:39,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 210 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:40,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:40,313 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:40,321 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:59:40,355 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-10-24 11:59:40,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:40,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 210 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:41,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:41,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 45 [2018-10-24 11:59:41,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-24 11:59:41,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-24 11:59:41,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1610, Unknown=0, NotChecked=0, Total=1980 [2018-10-24 11:59:41,100 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 45 states. [2018-10-24 11:59:44,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:44,140 INFO L93 Difference]: Finished difference Result 532 states and 551 transitions. [2018-10-24 11:59:44,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-24 11:59:44,140 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 74 [2018-10-24 11:59:44,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:44,141 INFO L225 Difference]: With dead ends: 532 [2018-10-24 11:59:44,141 INFO L226 Difference]: Without dead ends: 483 [2018-10-24 11:59:44,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3183 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1759, Invalid=7943, Unknown=0, NotChecked=0, Total=9702 [2018-10-24 11:59:44,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-10-24 11:59:44,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 107. [2018-10-24 11:59:44,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-24 11:59:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-24 11:59:44,374 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-24 11:59:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:44,374 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-24 11:59:44,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-24 11:59:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-24 11:59:44,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-24 11:59:44,375 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:44,375 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 7, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:44,375 INFO L424 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:44,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:44,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1776518404, now seen corresponding path program 42 times [2018-10-24 11:59:44,375 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:44,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:44,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:44,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:44,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 210 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:44,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:44,655 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:44,663 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:59:44,698 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-24 11:59:44,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:44,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 210 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:45,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:45,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 44 [2018-10-24 11:59:45,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-24 11:59:45,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-24 11:59:45,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1535, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 11:59:45,244 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 44 states. [2018-10-24 11:59:48,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:48,466 INFO L93 Difference]: Finished difference Result 588 states and 608 transitions. [2018-10-24 11:59:48,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-24 11:59:48,467 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 74 [2018-10-24 11:59:48,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:48,468 INFO L225 Difference]: With dead ends: 588 [2018-10-24 11:59:48,468 INFO L226 Difference]: Without dead ends: 539 [2018-10-24 11:59:48,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3118 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1725, Invalid=7781, Unknown=0, NotChecked=0, Total=9506 [2018-10-24 11:59:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2018-10-24 11:59:48,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 107. [2018-10-24 11:59:48,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-24 11:59:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-24 11:59:48,689 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-24 11:59:48,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:48,689 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-24 11:59:48,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-24 11:59:48,689 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-24 11:59:48,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-24 11:59:48,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:48,690 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 8, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:48,690 INFO L424 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:48,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:48,690 INFO L82 PathProgramCache]: Analyzing trace with hash 109974416, now seen corresponding path program 43 times [2018-10-24 11:59:48,690 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:48,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:48,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:48,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:48,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 210 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:48,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:48,954 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:48,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:49,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 210 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:49,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:49,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 43 [2018-10-24 11:59:49,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-24 11:59:49,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-24 11:59:49,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1458, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 11:59:49,408 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 43 states. [2018-10-24 11:59:52,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:52,908 INFO L93 Difference]: Finished difference Result 642 states and 663 transitions. [2018-10-24 11:59:52,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-24 11:59:52,908 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 74 [2018-10-24 11:59:52,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:52,910 INFO L225 Difference]: With dead ends: 642 [2018-10-24 11:59:52,910 INFO L226 Difference]: Without dead ends: 593 [2018-10-24 11:59:52,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2901 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1626, Invalid=7304, Unknown=0, NotChecked=0, Total=8930 [2018-10-24 11:59:52,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2018-10-24 11:59:53,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 107. [2018-10-24 11:59:53,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-24 11:59:53,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-24 11:59:53,179 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-24 11:59:53,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:53,179 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-24 11:59:53,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-24 11:59:53,179 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-24 11:59:53,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-24 11:59:53,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:53,180 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:53,180 INFO L424 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:53,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:53,181 INFO L82 PathProgramCache]: Analyzing trace with hash 90363164, now seen corresponding path program 44 times [2018-10-24 11:59:53,181 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:53,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:53,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:53,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:53,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 210 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:53,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:53,453 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:53,461 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:59:53,491 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:59:53,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:53,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 210 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:53,884 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:53,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 42 [2018-10-24 11:59:53,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-24 11:59:53,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-24 11:59:53,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1379, Unknown=0, NotChecked=0, Total=1722 [2018-10-24 11:59:53,885 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 42 states. [2018-10-24 11:59:57,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:57,325 INFO L93 Difference]: Finished difference Result 694 states and 716 transitions. [2018-10-24 11:59:57,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-24 11:59:57,326 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 74 [2018-10-24 11:59:57,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:57,327 INFO L225 Difference]: With dead ends: 694 [2018-10-24 11:59:57,328 INFO L226 Difference]: Without dead ends: 645 [2018-10-24 11:59:57,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1471, Invalid=6539, Unknown=0, NotChecked=0, Total=8010 [2018-10-24 11:59:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2018-10-24 11:59:57,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 107. [2018-10-24 11:59:57,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-24 11:59:57,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-24 11:59:57,575 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-24 11:59:57,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:57,575 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-24 11:59:57,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-24 11:59:57,575 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-24 11:59:57,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-24 11:59:57,576 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:57,576 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:57,576 INFO L424 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:57,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:57,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1095928232, now seen corresponding path program 45 times [2018-10-24 11:59:57,576 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:57,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:57,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:57,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:57,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:57,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:57,846 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:57,853 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:59:57,889 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-24 11:59:57,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:57,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:58,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:58,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 41 [2018-10-24 11:59:58,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-24 11:59:58,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-24 11:59:58,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=1298, Unknown=0, NotChecked=0, Total=1640 [2018-10-24 11:59:58,275 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 41 states. [2018-10-24 12:00:01,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:01,646 INFO L93 Difference]: Finished difference Result 744 states and 767 transitions. [2018-10-24 12:00:01,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-24 12:00:01,646 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 74 [2018-10-24 12:00:01,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:01,648 INFO L225 Difference]: With dead ends: 744 [2018-10-24 12:00:01,648 INFO L226 Difference]: Without dead ends: 695 [2018-10-24 12:00:01,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=5531, Unknown=0, NotChecked=0, Total=6806 [2018-10-24 12:00:01,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2018-10-24 12:00:01,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 107. [2018-10-24 12:00:01,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-24 12:00:01,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-24 12:00:01,881 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-24 12:00:01,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:01,881 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-24 12:00:01,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-24 12:00:01,882 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-24 12:00:01,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-24 12:00:01,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:01,882 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:01,882 INFO L424 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:01,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:01,882 INFO L82 PathProgramCache]: Analyzing trace with hash 444461364, now seen corresponding path program 10 times [2018-10-24 12:00:01,882 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:01,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:01,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:01,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:01,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:02,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:02,163 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:02,170 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:00:02,196 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:00:02,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:02,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:02,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:02,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-10-24 12:00:02,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-24 12:00:02,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-24 12:00:02,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 12:00:02,687 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 40 states. [2018-10-24 12:00:05,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:05,972 INFO L93 Difference]: Finished difference Result 797 states and 822 transitions. [2018-10-24 12:00:05,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-24 12:00:05,972 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 74 [2018-10-24 12:00:05,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:05,974 INFO L225 Difference]: With dead ends: 797 [2018-10-24 12:00:05,974 INFO L226 Difference]: Without dead ends: 748 [2018-10-24 12:00:05,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1059, Invalid=4343, Unknown=0, NotChecked=0, Total=5402 [2018-10-24 12:00:05,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2018-10-24 12:00:06,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 110. [2018-10-24 12:00:06,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-24 12:00:06,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2018-10-24 12:00:06,221 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 74 [2018-10-24 12:00:06,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:06,221 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2018-10-24 12:00:06,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-24 12:00:06,221 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2018-10-24 12:00:06,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-24 12:00:06,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:06,222 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:06,222 INFO L424 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:06,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:06,223 INFO L82 PathProgramCache]: Analyzing trace with hash -929558858, now seen corresponding path program 20 times [2018-10-24 12:00:06,223 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:06,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:06,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:06,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:06,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:06,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:06,523 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:06,531 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:06,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:06,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:06,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:06,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:06,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-24 12:00:06,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-24 12:00:06,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-24 12:00:06,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-10-24 12:00:06,830 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 17 states. [2018-10-24 12:00:07,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:07,479 INFO L93 Difference]: Finished difference Result 123 states and 136 transitions. [2018-10-24 12:00:07,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-24 12:00:07,479 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2018-10-24 12:00:07,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:07,480 INFO L225 Difference]: With dead ends: 123 [2018-10-24 12:00:07,480 INFO L226 Difference]: Without dead ends: 121 [2018-10-24 12:00:07,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=319, Invalid=551, Unknown=0, NotChecked=0, Total=870 [2018-10-24 12:00:07,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-24 12:00:07,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2018-10-24 12:00:07,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-24 12:00:07,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2018-10-24 12:00:07,732 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 76 [2018-10-24 12:00:07,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:07,732 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2018-10-24 12:00:07,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-24 12:00:07,732 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2018-10-24 12:00:07,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-24 12:00:07,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:07,733 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:07,733 INFO L424 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:07,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:07,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1797828993, now seen corresponding path program 21 times [2018-10-24 12:00:07,733 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:07,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:07,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:07,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:07,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:08,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:08,064 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:08,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:00:08,111 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-24 12:00:08,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:08,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:08,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:08,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 54 [2018-10-24 12:00:08,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-24 12:00:08,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-24 12:00:08,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=2287, Unknown=0, NotChecked=0, Total=2862 [2018-10-24 12:00:08,716 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand 54 states. [2018-10-24 12:00:10,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:10,452 INFO L93 Difference]: Finished difference Result 241 states and 256 transitions. [2018-10-24 12:00:10,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-24 12:00:10,452 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 80 [2018-10-24 12:00:10,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:10,453 INFO L225 Difference]: With dead ends: 241 [2018-10-24 12:00:10,453 INFO L226 Difference]: Without dead ends: 188 [2018-10-24 12:00:10,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=5095, Unknown=0, NotChecked=0, Total=6320 [2018-10-24 12:00:10,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-10-24 12:00:10,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 116. [2018-10-24 12:00:10,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-24 12:00:10,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-24 12:00:10,739 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-24 12:00:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:10,740 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-24 12:00:10,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-24 12:00:10,740 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-24 12:00:10,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-24 12:00:10,740 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:10,740 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:10,740 INFO L424 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:10,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:10,741 INFO L82 PathProgramCache]: Analyzing trace with hash 375902731, now seen corresponding path program 46 times [2018-10-24 12:00:10,741 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:10,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:10,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:10,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:10,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 253 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:11,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:11,174 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:11,181 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:00:11,211 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:00:11,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:11,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 253 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:12,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:12,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2018-10-24 12:00:12,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-24 12:00:12,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-24 12:00:12,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2018-10-24 12:00:12,036 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 53 states. [2018-10-24 12:00:14,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:14,266 INFO L93 Difference]: Finished difference Result 313 states and 329 transitions. [2018-10-24 12:00:14,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-24 12:00:14,266 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 80 [2018-10-24 12:00:14,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:14,267 INFO L225 Difference]: With dead ends: 313 [2018-10-24 12:00:14,267 INFO L226 Difference]: Without dead ends: 260 [2018-10-24 12:00:14,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1485, Invalid=6525, Unknown=0, NotChecked=0, Total=8010 [2018-10-24 12:00:14,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2018-10-24 12:00:14,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 116. [2018-10-24 12:00:14,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-24 12:00:14,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-24 12:00:14,585 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-24 12:00:14,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:14,585 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-24 12:00:14,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-24 12:00:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-24 12:00:14,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-24 12:00:14,585 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:14,586 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 9, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:14,586 INFO L424 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:14,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:14,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1964755095, now seen corresponding path program 47 times [2018-10-24 12:00:14,586 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:14,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:14,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:14,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:14,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 253 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:15,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:15,048 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:15,054 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:00:15,108 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-24 12:00:15,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:15,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 253 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:15,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:15,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 52 [2018-10-24 12:00:15,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-24 12:00:15,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-24 12:00:15,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=2145, Unknown=0, NotChecked=0, Total=2652 [2018-10-24 12:00:15,830 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 52 states. [2018-10-24 12:00:18,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:18,928 INFO L93 Difference]: Finished difference Result 383 states and 400 transitions. [2018-10-24 12:00:18,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-24 12:00:18,929 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 80 [2018-10-24 12:00:18,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:18,930 INFO L225 Difference]: With dead ends: 383 [2018-10-24 12:00:18,930 INFO L226 Difference]: Without dead ends: 330 [2018-10-24 12:00:18,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3054 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1729, Invalid=7777, Unknown=0, NotChecked=0, Total=9506 [2018-10-24 12:00:18,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2018-10-24 12:00:19,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 116. [2018-10-24 12:00:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-24 12:00:19,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-24 12:00:19,226 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-24 12:00:19,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:19,226 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-24 12:00:19,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-24 12:00:19,226 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-24 12:00:19,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-24 12:00:19,226 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:19,226 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 8, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:19,226 INFO L424 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:19,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:19,227 INFO L82 PathProgramCache]: Analyzing trace with hash 2033447459, now seen corresponding path program 48 times [2018-10-24 12:00:19,227 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:19,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:19,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:19,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:19,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 253 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:19,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:19,632 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:19,639 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:00:19,679 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-24 12:00:19,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:19,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 253 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:20,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:20,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 51 [2018-10-24 12:00:20,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-24 12:00:20,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-24 12:00:20,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=2071, Unknown=0, NotChecked=0, Total=2550 [2018-10-24 12:00:20,292 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 51 states. [2018-10-24 12:00:23,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:23,820 INFO L93 Difference]: Finished difference Result 451 states and 469 transitions. [2018-10-24 12:00:23,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-24 12:00:23,820 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 80 [2018-10-24 12:00:23,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:23,821 INFO L225 Difference]: With dead ends: 451 [2018-10-24 12:00:23,821 INFO L226 Difference]: Without dead ends: 398 [2018-10-24 12:00:23,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3509 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1933, Invalid=8779, Unknown=0, NotChecked=0, Total=10712 [2018-10-24 12:00:23,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-10-24 12:00:24,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 116. [2018-10-24 12:00:24,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-24 12:00:24,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-24 12:00:24,137 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-24 12:00:24,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:24,137 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-24 12:00:24,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-24 12:00:24,137 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-24 12:00:24,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-24 12:00:24,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:24,137 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 8, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:24,138 INFO L424 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:24,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:24,138 INFO L82 PathProgramCache]: Analyzing trace with hash -2078208337, now seen corresponding path program 49 times [2018-10-24 12:00:24,138 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:24,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:24,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:24,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:24,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 253 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:24,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:24,473 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:24,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:24,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 253 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:25,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:25,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 50 [2018-10-24 12:00:25,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-24 12:00:25,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-24 12:00:25,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1995, Unknown=0, NotChecked=0, Total=2450 [2018-10-24 12:00:25,057 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 50 states. [2018-10-24 12:00:29,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:29,002 INFO L93 Difference]: Finished difference Result 517 states and 536 transitions. [2018-10-24 12:00:29,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-24 12:00:29,002 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 80 [2018-10-24 12:00:29,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:29,003 INFO L225 Difference]: With dead ends: 517 [2018-10-24 12:00:29,004 INFO L226 Difference]: Without dead ends: 464 [2018-10-24 12:00:29,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3839 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2079, Invalid=9477, Unknown=0, NotChecked=0, Total=11556 [2018-10-24 12:00:29,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2018-10-24 12:00:29,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 116. [2018-10-24 12:00:29,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-24 12:00:29,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-24 12:00:29,328 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-24 12:00:29,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:29,329 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-24 12:00:29,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-24 12:00:29,329 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-24 12:00:29,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-24 12:00:29,329 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:29,329 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:29,329 INFO L424 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:29,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:29,330 INFO L82 PathProgramCache]: Analyzing trace with hash 478404155, now seen corresponding path program 50 times [2018-10-24 12:00:29,330 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:29,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:29,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:29,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:29,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 253 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:29,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:29,703 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:29,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:29,740 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:29,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:29,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 253 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:30,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:30,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 49 [2018-10-24 12:00:30,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-24 12:00:30,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-24 12:00:30,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1917, Unknown=0, NotChecked=0, Total=2352 [2018-10-24 12:00:30,254 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 49 states. [2018-10-24 12:00:34,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:34,476 INFO L93 Difference]: Finished difference Result 581 states and 601 transitions. [2018-10-24 12:00:34,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-24 12:00:34,476 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 80 [2018-10-24 12:00:34,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:34,477 INFO L225 Difference]: With dead ends: 581 [2018-10-24 12:00:34,477 INFO L226 Difference]: Without dead ends: 528 [2018-10-24 12:00:34,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4018 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2155, Invalid=9835, Unknown=0, NotChecked=0, Total=11990 [2018-10-24 12:00:34,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2018-10-24 12:00:34,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 116. [2018-10-24 12:00:34,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-24 12:00:34,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-24 12:00:34,829 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-24 12:00:34,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:34,829 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-24 12:00:34,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-24 12:00:34,829 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-24 12:00:34,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-24 12:00:34,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:34,830 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:34,830 INFO L424 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:34,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:34,830 INFO L82 PathProgramCache]: Analyzing trace with hash 2049777863, now seen corresponding path program 51 times [2018-10-24 12:00:34,831 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:34,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:34,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:34,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:34,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 253 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:35,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:35,459 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:35,465 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:00:35,502 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-24 12:00:35,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:35,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 253 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:36,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:36,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 48 [2018-10-24 12:00:36,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-24 12:00:36,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-24 12:00:36,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2018-10-24 12:00:36,041 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 48 states. [2018-10-24 12:00:40,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:40,553 INFO L93 Difference]: Finished difference Result 643 states and 664 transitions. [2018-10-24 12:00:40,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-24 12:00:40,554 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 80 [2018-10-24 12:00:40,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:40,555 INFO L225 Difference]: With dead ends: 643 [2018-10-24 12:00:40,556 INFO L226 Difference]: Without dead ends: 590 [2018-10-24 12:00:40,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2155, Invalid=9835, Unknown=0, NotChecked=0, Total=11990 [2018-10-24 12:00:40,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2018-10-24 12:00:40,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 116. [2018-10-24 12:00:40,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-24 12:00:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-24 12:00:40,887 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-24 12:00:40,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:40,887 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-24 12:00:40,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-24 12:00:40,887 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-24 12:00:40,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-24 12:00:40,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:40,888 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 8, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:40,888 INFO L424 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:40,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:40,889 INFO L82 PathProgramCache]: Analyzing trace with hash 303928915, now seen corresponding path program 52 times [2018-10-24 12:00:40,889 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:40,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:40,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:40,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:40,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 253 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:41,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:41,260 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:41,268 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:00:41,298 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:00:41,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:41,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 253 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:41,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:41,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 47 [2018-10-24 12:00:41,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-24 12:00:41,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-24 12:00:41,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1755, Unknown=0, NotChecked=0, Total=2162 [2018-10-24 12:00:41,823 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 47 states. [2018-10-24 12:00:46,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:46,521 INFO L93 Difference]: Finished difference Result 703 states and 725 transitions. [2018-10-24 12:00:46,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-24 12:00:46,522 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 80 [2018-10-24 12:00:46,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:46,524 INFO L225 Difference]: With dead ends: 703 [2018-10-24 12:00:46,524 INFO L226 Difference]: Without dead ends: 650 [2018-10-24 12:00:46,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3875 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2079, Invalid=9477, Unknown=0, NotChecked=0, Total=11556 [2018-10-24 12:00:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2018-10-24 12:00:46,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 116. [2018-10-24 12:00:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-24 12:00:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-24 12:00:46,875 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-24 12:00:46,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:46,875 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-24 12:00:46,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-24 12:00:46,876 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-24 12:00:46,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-24 12:00:46,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:46,876 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 8, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:46,877 INFO L424 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:46,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:46,877 INFO L82 PathProgramCache]: Analyzing trace with hash 579206879, now seen corresponding path program 53 times [2018-10-24 12:00:46,877 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:46,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:46,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:46,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:46,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 253 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:47,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:47,275 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:47,284 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:00:47,321 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-24 12:00:47,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:47,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 253 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:48,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:48,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 46 [2018-10-24 12:00:48,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-24 12:00:48,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-24 12:00:48,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1671, Unknown=0, NotChecked=0, Total=2070 [2018-10-24 12:00:48,048 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 46 states. [2018-10-24 12:00:52,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:52,706 INFO L93 Difference]: Finished difference Result 761 states and 784 transitions. [2018-10-24 12:00:52,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-24 12:00:52,706 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 80 [2018-10-24 12:00:52,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:52,708 INFO L225 Difference]: With dead ends: 761 [2018-10-24 12:00:52,708 INFO L226 Difference]: Without dead ends: 708 [2018-10-24 12:00:52,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3549 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1933, Invalid=8779, Unknown=0, NotChecked=0, Total=10712 [2018-10-24 12:00:52,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2018-10-24 12:00:53,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 116. [2018-10-24 12:00:53,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-24 12:00:53,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-24 12:00:53,055 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-24 12:00:53,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:53,056 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-24 12:00:53,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-24 12:00:53,056 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-24 12:00:53,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-24 12:00:53,056 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:53,056 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 9, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:53,056 INFO L424 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:53,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:53,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1053235819, now seen corresponding path program 54 times [2018-10-24 12:00:53,057 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:53,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:53,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:53,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:53,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 253 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:53,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:53,366 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:53,373 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:00:53,408 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-24 12:00:53,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:53,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 253 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:53,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:53,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 45 [2018-10-24 12:00:53,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-24 12:00:53,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-24 12:00:53,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1585, Unknown=0, NotChecked=0, Total=1980 [2018-10-24 12:00:53,860 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 45 states. [2018-10-24 12:00:58,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:58,710 INFO L93 Difference]: Finished difference Result 817 states and 841 transitions. [2018-10-24 12:00:58,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-24 12:00:58,711 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 80 [2018-10-24 12:00:58,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:58,713 INFO L225 Difference]: With dead ends: 817 [2018-10-24 12:00:58,713 INFO L226 Difference]: Without dead ends: 764 [2018-10-24 12:00:58,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3068 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1729, Invalid=7777, Unknown=0, NotChecked=0, Total=9506 [2018-10-24 12:00:58,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2018-10-24 12:00:59,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 116. [2018-10-24 12:00:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-24 12:00:59,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-24 12:00:59,089 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-24 12:00:59,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:59,089 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-24 12:00:59,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-24 12:00:59,089 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-24 12:00:59,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-24 12:00:59,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:59,090 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:59,090 INFO L424 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:59,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:59,090 INFO L82 PathProgramCache]: Analyzing trace with hash -613308169, now seen corresponding path program 55 times [2018-10-24 12:00:59,090 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:59,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:59,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:59,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:59,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 253 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:59,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:59,400 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:59,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:59,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 253 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:59,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:59,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 44 [2018-10-24 12:00:59,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-24 12:00:59,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-24 12:00:59,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1497, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 12:00:59,952 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 44 states. [2018-10-24 12:01:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:04,872 INFO L93 Difference]: Finished difference Result 871 states and 896 transitions. [2018-10-24 12:01:04,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-24 12:01:04,872 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 80 [2018-10-24 12:01:04,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:04,875 INFO L225 Difference]: With dead ends: 871 [2018-10-24 12:01:04,875 INFO L226 Difference]: Without dead ends: 818 [2018-10-24 12:01:04,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2458 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1485, Invalid=6525, Unknown=0, NotChecked=0, Total=8010 [2018-10-24 12:01:04,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2018-10-24 12:01:05,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 116. [2018-10-24 12:01:05,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-24 12:01:05,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-24 12:01:05,236 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-24 12:01:05,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:05,236 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-24 12:01:05,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-24 12:01:05,236 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-24 12:01:05,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-24 12:01:05,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:05,237 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:05,237 INFO L424 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:05,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:05,237 INFO L82 PathProgramCache]: Analyzing trace with hash -632919421, now seen corresponding path program 11 times [2018-10-24 12:01:05,237 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:05,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:05,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:05,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:01:05,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:05,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:05,991 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:05,997 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:01:06,041 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-24 12:01:06,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:06,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:06,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:06,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2018-10-24 12:01:06,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-24 12:01:06,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-24 12:01:06,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1407, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 12:01:06,469 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 43 states. [2018-10-24 12:01:11,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:11,243 INFO L93 Difference]: Finished difference Result 928 states and 955 transitions. [2018-10-24 12:01:11,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-24 12:01:11,243 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 80 [2018-10-24 12:01:11,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:11,246 INFO L225 Difference]: With dead ends: 928 [2018-10-24 12:01:11,247 INFO L226 Difference]: Without dead ends: 875 [2018-10-24 12:01:11,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1225, Invalid=5095, Unknown=0, NotChecked=0, Total=6320 [2018-10-24 12:01:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2018-10-24 12:01:11,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 119. [2018-10-24 12:01:11,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-24 12:01:11,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 133 transitions. [2018-10-24 12:01:11,618 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 133 transitions. Word has length 80 [2018-10-24 12:01:11,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:11,618 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 133 transitions. [2018-10-24 12:01:11,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-24 12:01:11,618 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 133 transitions. [2018-10-24 12:01:11,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-24 12:01:11,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:11,619 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:11,619 INFO L424 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:11,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:11,619 INFO L82 PathProgramCache]: Analyzing trace with hash -5497607, now seen corresponding path program 22 times [2018-10-24 12:01:11,619 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:11,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:11,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:11,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:11,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:11,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:11,781 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:11,788 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:01:11,823 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:01:11,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:11,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:12,018 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:12,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:12,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-10-24 12:01:12,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-24 12:01:12,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-24 12:01:12,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-24 12:01:12,039 INFO L87 Difference]: Start difference. First operand 119 states and 133 transitions. Second operand 18 states. [2018-10-24 12:01:12,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:12,944 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2018-10-24 12:01:12,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-24 12:01:12,944 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2018-10-24 12:01:12,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:12,945 INFO L225 Difference]: With dead ends: 132 [2018-10-24 12:01:12,945 INFO L226 Difference]: Without dead ends: 130 [2018-10-24 12:01:12,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=364, Invalid=628, Unknown=0, NotChecked=0, Total=992 [2018-10-24 12:01:12,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-24 12:01:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2018-10-24 12:01:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-24 12:01:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2018-10-24 12:01:13,298 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 82 [2018-10-24 12:01:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:13,298 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2018-10-24 12:01:13,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-24 12:01:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2018-10-24 12:01:13,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-24 12:01:13,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:13,298 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:13,298 INFO L424 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:13,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:13,299 INFO L82 PathProgramCache]: Analyzing trace with hash -354122942, now seen corresponding path program 23 times [2018-10-24 12:01:13,299 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:13,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:13,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:13,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:13,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:13,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:13,678 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:13,686 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:01:13,727 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-24 12:01:13,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:13,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:14,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:14,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 58 [2018-10-24 12:01:14,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-24 12:01:14,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-24 12:01:14,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=2645, Unknown=0, NotChecked=0, Total=3306 [2018-10-24 12:01:14,401 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand 58 states. [2018-10-24 12:01:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:16,470 INFO L93 Difference]: Finished difference Result 260 states and 276 transitions. [2018-10-24 12:01:16,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-24 12:01:16,470 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 86 [2018-10-24 12:01:16,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:16,471 INFO L225 Difference]: With dead ends: 260 [2018-10-24 12:01:16,471 INFO L226 Difference]: Without dead ends: 203 [2018-10-24 12:01:16,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1403, Invalid=5907, Unknown=0, NotChecked=0, Total=7310 [2018-10-24 12:01:16,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-24 12:01:16,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 125. [2018-10-24 12:01:16,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-24 12:01:16,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2018-10-24 12:01:16,872 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 86 [2018-10-24 12:01:16,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:16,872 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2018-10-24 12:01:16,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-24 12:01:16,873 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2018-10-24 12:01:16,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-24 12:01:16,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:16,873 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:16,873 INFO L424 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:16,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:16,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1095815730, now seen corresponding path program 56 times [2018-10-24 12:01:16,874 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:16,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:16,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:16,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:16,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 300 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:17,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:17,238 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:17,246 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:01:17,282 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:01:17,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:17,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 300 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:18,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:18,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 57 [2018-10-24 12:01:18,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-24 12:01:18,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-24 12:01:18,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=2570, Unknown=0, NotChecked=0, Total=3192 [2018-10-24 12:01:18,075 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand 57 states. [2018-10-24 12:01:21,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:21,141 INFO L93 Difference]: Finished difference Result 338 states and 355 transitions. [2018-10-24 12:01:21,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-24 12:01:21,141 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 86 [2018-10-24 12:01:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:21,142 INFO L225 Difference]: With dead ends: 338 [2018-10-24 12:01:21,142 INFO L226 Difference]: Without dead ends: 281 [2018-10-24 12:01:21,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2962 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1711, Invalid=7601, Unknown=0, NotChecked=0, Total=9312 [2018-10-24 12:01:21,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-10-24 12:01:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 125. [2018-10-24 12:01:21,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-24 12:01:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2018-10-24 12:01:21,563 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 86 [2018-10-24 12:01:21,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:21,563 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2018-10-24 12:01:21,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-24 12:01:21,563 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2018-10-24 12:01:21,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-24 12:01:21,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:21,564 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 10, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:21,564 INFO L424 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:21,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:21,564 INFO L82 PathProgramCache]: Analyzing trace with hash 905644890, now seen corresponding path program 57 times [2018-10-24 12:01:21,564 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:21,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:21,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:21,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:21,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 300 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:21,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:21,956 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:21,964 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:01:22,006 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-10-24 12:01:22,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:22,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 300 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:22,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:22,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 56 [2018-10-24 12:01:22,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-24 12:01:22,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-24 12:01:22,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=587, Invalid=2493, Unknown=0, NotChecked=0, Total=3080 [2018-10-24 12:01:22,694 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand 56 states. [2018-10-24 12:01:26,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:26,506 INFO L93 Difference]: Finished difference Result 414 states and 432 transitions. [2018-10-24 12:01:26,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-24 12:01:26,506 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 86 [2018-10-24 12:01:26,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:26,507 INFO L225 Difference]: With dead ends: 414 [2018-10-24 12:01:26,507 INFO L226 Difference]: Without dead ends: 357 [2018-10-24 12:01:26,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2008, Invalid=9122, Unknown=0, NotChecked=0, Total=11130 [2018-10-24 12:01:26,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2018-10-24 12:01:26,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 125. [2018-10-24 12:01:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-24 12:01:26,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2018-10-24 12:01:26,970 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 86 [2018-10-24 12:01:26,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:26,970 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2018-10-24 12:01:26,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-24 12:01:26,971 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2018-10-24 12:01:26,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-24 12:01:26,971 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:26,971 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 9, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:26,971 INFO L424 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:26,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:26,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1787241498, now seen corresponding path program 58 times [2018-10-24 12:01:26,972 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:26,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:26,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:26,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:26,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 300 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:27,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:27,362 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:27,369 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:01:27,405 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:01:27,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:27,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 300 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:28,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:28,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 55 [2018-10-24 12:01:28,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-24 12:01:28,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-24 12:01:28,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=2414, Unknown=0, NotChecked=0, Total=2970 [2018-10-24 12:01:28,054 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand 55 states. [2018-10-24 12:01:32,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:32,469 INFO L93 Difference]: Finished difference Result 488 states and 507 transitions. [2018-10-24 12:01:32,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-24 12:01:32,469 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 86 [2018-10-24 12:01:32,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:32,470 INFO L225 Difference]: With dead ends: 488 [2018-10-24 12:01:32,471 INFO L226 Difference]: Without dead ends: 431 [2018-10-24 12:01:32,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4206 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2267, Invalid=10389, Unknown=0, NotChecked=0, Total=12656 [2018-10-24 12:01:32,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-10-24 12:01:32,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 125. [2018-10-24 12:01:32,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-24 12:01:32,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2018-10-24 12:01:32,932 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 86 [2018-10-24 12:01:32,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:32,932 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2018-10-24 12:01:32,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-24 12:01:32,932 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2018-10-24 12:01:32,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-24 12:01:32,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:32,933 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 9, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:32,933 INFO L424 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:32,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:32,934 INFO L82 PathProgramCache]: Analyzing trace with hash 386490226, now seen corresponding path program 59 times [2018-10-24 12:01:32,934 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:32,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:32,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:32,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:32,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 300 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:33,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:33,647 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:33,655 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:01:33,703 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-24 12:01:33,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:33,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 300 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:34,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:34,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 54 [2018-10-24 12:01:34,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-24 12:01:34,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-24 12:01:34,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=2333, Unknown=0, NotChecked=0, Total=2862 [2018-10-24 12:01:34,317 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand 54 states. Received shutdown request... [2018-10-24 12:01:38,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-24 12:01:38,863 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 12:01:38,868 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 12:01:38,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:01:38 BoogieIcfgContainer [2018-10-24 12:01:38,868 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 12:01:38,869 INFO L168 Benchmark]: Toolchain (without parser) took 247931.28 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 575.7 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -131.0 MB). Peak memory consumption was 444.7 MB. Max. memory is 7.1 GB. [2018-10-24 12:01:38,870 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:01:38,870 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.29 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. [2018-10-24 12:01:38,870 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.62 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. [2018-10-24 12:01:38,871 INFO L168 Benchmark]: Boogie Preprocessor took 23.44 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. [2018-10-24 12:01:38,871 INFO L168 Benchmark]: RCFGBuilder took 419.14 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 732.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -784.5 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-10-24 12:01:38,871 INFO L168 Benchmark]: TraceAbstraction took 247124.27 ms. Allocated memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: -156.8 MB). Free memory was 2.2 GB in the beginning and 1.5 GB in the end (delta: 643.0 MB). Peak memory consumption was 486.2 MB. Max. memory is 7.1 GB. [2018-10-24 12:01:38,873 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 329.29 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 30.62 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 23.44 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 419.14 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 732.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -784.5 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 247124.27 ms. Allocated memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: -156.8 MB). Free memory was 2.2 GB in the beginning and 1.5 GB in the end (delta: 643.0 MB). Peak memory consumption was 486.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was constructing difference of abstraction (125states) and FLOYD_HOARE automaton (currently 68 states, 54 states before enhancement),while ReachableStatesComputation was computing reachable states (437 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. TIMEOUT Result, 247.0s OverallTime, 96 OverallIterations, 13 TraceHistogramMax, 156.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3163 SDtfs, 15169 SDslu, 33828 SDs, 0 SdLazy, 28150 SolverSat, 4791 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 32.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10275 GetRequests, 4463 SyntacticMatches, 0 SemanticMatches, 5812 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138144 ImplicationChecksByTransitivity, 117.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=125occurred in iteration=92, 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: 13.0s AutomataMinimizationTime, 95 MinimizatonAttempts, 19653 StatesRemovedByMinimization, 94 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 69.9s InterpolantComputationTime, 11066 NumberOfCodeBlocks, 11066 NumberOfCodeBlocksAsserted, 575 NumberOfCheckSat, 10877 ConstructedInterpolants, 0 QuantifiedInterpolants, 4300086 SizeOfPredicates, 443 NumberOfNonLiveVariables, 14908 ConjunctsInSsa, 1976 ConjunctsInUnsatCore, 189 InterpolantComputations, 3 PerfectInterpolantSequences, 25046/36410 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown