java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007_true-unreach-call_true-termination.c.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 22:32:23,236 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 22:32:23,239 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 22:32:23,251 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 22:32:23,251 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 22:32:23,252 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 22:32:23,254 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 22:32:23,255 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 22:32:23,257 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 22:32:23,258 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 22:32:23,259 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 22:32:23,259 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 22:32:23,260 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 22:32:23,261 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 22:32:23,262 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 22:32:23,263 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 22:32:23,264 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 22:32:23,265 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 22:32:23,267 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 22:32:23,269 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 22:32:23,270 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 22:32:23,271 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 22:32:23,275 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-26 22:32:23,283 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 [2018-10-26 22:32:23,297 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 22:32:23,297 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 22:32:23,298 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 22:32:23,298 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 22:32:23,299 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 22:32:23,299 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 22:32:23,299 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 22:32:23,300 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 22:32:23,300 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 22:32:23,300 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 22:32:23,300 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 22:32:23,300 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 22:32:23,301 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 22:32:23,301 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 22:32:23,301 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 22:32:23,301 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 22:32:23,301 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 22:32:23,302 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 22:32:23,302 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 22:32:23,302 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 22:32:23,302 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 22:32:23,302 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 22:32:23,303 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 22:32:23,303 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 22:32:23,303 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 22:32:23,303 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 22:32:23,306 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 22:32:23,306 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 22:32:23,353 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 22:32:23,367 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 22:32:23,371 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 22:32:23,373 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 22:32:23,373 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 22:32:23,374 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-lit/gj2007_true-unreach-call_true-termination.c.i [2018-10-26 22:32:23,430 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/773d76ffc/a1bbd8be85544d1ba83a9ae9e27c806a/FLAGee95d80db [2018-10-26 22:32:23,827 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 22:32:23,828 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007_true-unreach-call_true-termination.c.i [2018-10-26 22:32:23,834 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/773d76ffc/a1bbd8be85544d1ba83a9ae9e27c806a/FLAGee95d80db [2018-10-26 22:32:23,851 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/773d76ffc/a1bbd8be85544d1ba83a9ae9e27c806a [2018-10-26 22:32:23,862 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 22:32:23,865 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 22:32:23,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 22:32:23,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 22:32:23,871 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 22:32:23,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:32:23" (1/1) ... [2018-10-26 22:32:23,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e34a1a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:23, skipping insertion in model container [2018-10-26 22:32:23,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:32:23" (1/1) ... [2018-10-26 22:32:23,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 22:32:23,910 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 22:32:24,113 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:32:24,118 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 22:32:24,138 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:32:24,157 INFO L193 MainTranslator]: Completed translation [2018-10-26 22:32:24,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:24 WrapperNode [2018-10-26 22:32:24,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 22:32:24,159 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 22:32:24,159 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 22:32:24,159 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 22:32:24,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:24" (1/1) ... [2018-10-26 22:32:24,175 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:24" (1/1) ... [2018-10-26 22:32:24,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 22:32:24,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 22:32:24,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 22:32:24,191 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 22:32:24,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:24" (1/1) ... [2018-10-26 22:32:24,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:24" (1/1) ... [2018-10-26 22:32:24,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:24" (1/1) ... [2018-10-26 22:32:24,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:24" (1/1) ... [2018-10-26 22:32:24,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:24" (1/1) ... [2018-10-26 22:32:24,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:24" (1/1) ... [2018-10-26 22:32:24,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:24" (1/1) ... [2018-10-26 22:32:24,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 22:32:24,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 22:32:24,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 22:32:24,215 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 22:32:24,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:24" (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 [2018-10-26 22:32:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 22:32:24,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 22:32:24,533 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 22:32:24,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:32:24 BoogieIcfgContainer [2018-10-26 22:32:24,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 22:32:24,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 22:32:24,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 22:32:24,538 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 22:32:24,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:32:23" (1/3) ... [2018-10-26 22:32:24,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@604fddaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:32:24, skipping insertion in model container [2018-10-26 22:32:24,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:32:24" (2/3) ... [2018-10-26 22:32:24,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@604fddaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:32:24, skipping insertion in model container [2018-10-26 22:32:24,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:32:24" (3/3) ... [2018-10-26 22:32:24,541 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007_true-unreach-call_true-termination.c.i [2018-10-26 22:32:24,551 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 22:32:24,558 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 22:32:24,573 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 22:32:24,604 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 22:32:24,605 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 22:32:24,605 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 22:32:24,605 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 22:32:24,605 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 22:32:24,605 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 22:32:24,605 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 22:32:24,606 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 22:32:24,606 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 22:32:24,622 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-10-26 22:32:24,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-26 22:32:24,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:24,631 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-26 22:32:24,633 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:24,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:24,638 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2018-10-26 22:32:24,640 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:24,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:24,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:24,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:24,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:24,740 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:32:24,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 22:32:24,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 22:32:24,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 22:32:24,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 22:32:24,758 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-10-26 22:32:24,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:24,773 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-26 22:32:24,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 22:32:24,774 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-26 22:32:24,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:24,784 INFO L225 Difference]: With dead ends: 21 [2018-10-26 22:32:24,784 INFO L226 Difference]: Without dead ends: 9 [2018-10-26 22:32:24,788 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 [2018-10-26 22:32:24,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-26 22:32:24,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-26 22:32:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-26 22:32:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-26 22:32:24,817 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-26 22:32:24,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:24,818 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-26 22:32:24,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 22:32:24,818 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-26 22:32:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-26 22:32:24,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:24,819 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:24,819 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:24,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:24,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1805929617, now seen corresponding path program 1 times [2018-10-26 22:32:24,820 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:24,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:24,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:24,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:24,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:24,864 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:32:24,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 22:32:24,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 22:32:24,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 22:32:24,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 22:32:24,867 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-10-26 22:32:24,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:24,989 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2018-10-26 22:32:24,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 22:32:24,990 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-26 22:32:24,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:24,990 INFO L225 Difference]: With dead ends: 19 [2018-10-26 22:32:24,991 INFO L226 Difference]: Without dead ends: 12 [2018-10-26 22:32:24,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 22:32:24,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-26 22:32:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-26 22:32:24,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-26 22:32:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-10-26 22:32:24,994 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2018-10-26 22:32:24,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:24,994 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-10-26 22:32:24,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 22:32:24,995 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-10-26 22:32:24,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 22:32:24,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:24,996 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:24,996 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:24,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:24,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1049525042, now seen corresponding path program 1 times [2018-10-26 22:32:24,996 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:24,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:24,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:24,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:24,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:25,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:25,084 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 [2018-10-26 22:32:25,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:25,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:25,194 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 22:32:25,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-26 22:32:25,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 22:32:25,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 22:32:25,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:32:25,196 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2018-10-26 22:32:25,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:25,261 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-10-26 22:32:25,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 22:32:25,261 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-10-26 22:32:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:25,262 INFO L225 Difference]: With dead ends: 25 [2018-10-26 22:32:25,262 INFO L226 Difference]: Without dead ends: 18 [2018-10-26 22:32:25,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:32:25,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-26 22:32:25,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-26 22:32:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-26 22:32:25,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-26 22:32:25,267 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 10 [2018-10-26 22:32:25,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:25,268 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-26 22:32:25,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 22:32:25,268 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-26 22:32:25,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-26 22:32:25,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:25,269 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:25,269 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:25,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:25,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1721888980, now seen corresponding path program 1 times [2018-10-26 22:32:25,270 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:25,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:25,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:25,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:25,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:25,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:25,357 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 [2018-10-26 22:32:25,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:25,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:25,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:25,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-26 22:32:25,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 22:32:25,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 22:32:25,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:32:25,432 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2018-10-26 22:32:25,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:25,497 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-10-26 22:32:25,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 22:32:25,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-10-26 22:32:25,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:25,500 INFO L225 Difference]: With dead ends: 29 [2018-10-26 22:32:25,500 INFO L226 Difference]: Without dead ends: 20 [2018-10-26 22:32:25,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:32:25,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-26 22:32:25,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-26 22:32:25,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-26 22:32:25,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-10-26 22:32:25,509 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2018-10-26 22:32:25,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:25,511 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-10-26 22:32:25,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 22:32:25,511 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-10-26 22:32:25,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-26 22:32:25,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:25,512 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:25,512 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:25,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:25,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1066415217, now seen corresponding path program 2 times [2018-10-26 22:32:25,514 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:25,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:25,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:25,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:25,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:25,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:25,668 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-26 22:32:25,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:32:25,730 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:32:25,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:25,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:25,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:25,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-26 22:32:25,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 22:32:25,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 22:32:25,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 22:32:25,779 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2018-10-26 22:32:25,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:25,884 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-10-26 22:32:25,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 22:32:25,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-10-26 22:32:25,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:25,886 INFO L225 Difference]: With dead ends: 32 [2018-10-26 22:32:25,886 INFO L226 Difference]: Without dead ends: 23 [2018-10-26 22:32:25,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 22:32:25,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-26 22:32:25,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-26 22:32:25,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-26 22:32:25,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-26 22:32:25,891 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2018-10-26 22:32:25,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:25,891 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-26 22:32:25,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 22:32:25,892 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-26 22:32:25,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-26 22:32:25,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:25,893 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:25,893 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:25,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:25,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1231130700, now seen corresponding path program 3 times [2018-10-26 22:32:25,894 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:25,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:25,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:25,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:25,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:26,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:26,041 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 [2018-10-26 22:32:26,050 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:32:26,075 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-26 22:32:26,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:26,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-26 22:32:26,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:26,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2018-10-26 22:32:26,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 22:32:26,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 22:32:26,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:32:26,159 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2018-10-26 22:32:26,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:26,315 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2018-10-26 22:32:26,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 22:32:26,315 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-10-26 22:32:26,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:26,318 INFO L225 Difference]: With dead ends: 39 [2018-10-26 22:32:26,319 INFO L226 Difference]: Without dead ends: 30 [2018-10-26 22:32:26,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:32:26,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-26 22:32:26,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-26 22:32:26,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-26 22:32:26,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-10-26 22:32:26,325 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2018-10-26 22:32:26,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:26,325 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-10-26 22:32:26,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 22:32:26,326 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-10-26 22:32:26,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-26 22:32:26,327 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:26,327 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 5, 2, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:26,327 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:26,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:26,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1951438702, now seen corresponding path program 4 times [2018-10-26 22:32:26,328 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:26,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:26,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:26,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:26,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 22:32:26,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:26,411 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 [2018-10-26 22:32:26,427 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:32:26,440 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:32:26,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:26,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 22:32:26,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:26,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-26 22:32:26,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 22:32:26,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 22:32:26,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-26 22:32:26,475 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 8 states. [2018-10-26 22:32:26,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:26,544 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2018-10-26 22:32:26,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 22:32:26,545 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2018-10-26 22:32:26,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:26,546 INFO L225 Difference]: With dead ends: 44 [2018-10-26 22:32:26,547 INFO L226 Difference]: Without dead ends: 32 [2018-10-26 22:32:26,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-26 22:32:26,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-26 22:32:26,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-26 22:32:26,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-26 22:32:26,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-26 22:32:26,552 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2018-10-26 22:32:26,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:26,553 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-26 22:32:26,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 22:32:26,553 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-26 22:32:26,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-26 22:32:26,554 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:26,554 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:26,554 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:26,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:26,555 INFO L82 PathProgramCache]: Analyzing trace with hash -11282607, now seen corresponding path program 5 times [2018-10-26 22:32:26,555 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:26,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:26,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:26,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:26,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 35 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 22:32:26,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:26,993 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-26 22:32:27,005 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:32:27,028 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-26 22:32:27,029 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:27,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 35 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 22:32:27,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:27,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-26 22:32:27,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 22:32:27,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 22:32:27,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:32:27,071 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2018-10-26 22:32:27,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:27,118 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2018-10-26 22:32:27,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 22:32:27,119 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2018-10-26 22:32:27,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:27,120 INFO L225 Difference]: With dead ends: 47 [2018-10-26 22:32:27,120 INFO L226 Difference]: Without dead ends: 35 [2018-10-26 22:32:27,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:32:27,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-26 22:32:27,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-26 22:32:27,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-26 22:32:27,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-10-26 22:32:27,125 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2018-10-26 22:32:27,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:27,126 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-10-26 22:32:27,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 22:32:27,126 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-10-26 22:32:27,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-26 22:32:27,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:27,127 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 7, 2, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:27,127 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:27,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:27,128 INFO L82 PathProgramCache]: Analyzing trace with hash 242968718, now seen corresponding path program 6 times [2018-10-26 22:32:27,128 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:27,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:27,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:27,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:27,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 40 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 22:32:27,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:27,338 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 [2018-10-26 22:32:27,357 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:32:27,386 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-26 22:32:27,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:27,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 56 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-10-26 22:32:27,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:27,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2018-10-26 22:32:27,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 22:32:27,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 22:32:27,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-26 22:32:27,474 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 13 states. [2018-10-26 22:32:27,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:27,585 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2018-10-26 22:32:27,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-26 22:32:27,585 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2018-10-26 22:32:27,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:27,587 INFO L225 Difference]: With dead ends: 54 [2018-10-26 22:32:27,587 INFO L226 Difference]: Without dead ends: 42 [2018-10-26 22:32:27,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-26 22:32:27,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-26 22:32:27,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-10-26 22:32:27,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-26 22:32:27,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-10-26 22:32:27,593 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2018-10-26 22:32:27,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:27,594 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-10-26 22:32:27,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 22:32:27,594 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-10-26 22:32:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-26 22:32:27,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:27,595 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 8, 3, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:27,596 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:27,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:27,596 INFO L82 PathProgramCache]: Analyzing trace with hash -2085606292, now seen corresponding path program 7 times [2018-10-26 22:32:27,596 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:27,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:27,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:27,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:27,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 72 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-26 22:32:27,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:27,770 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 [2018-10-26 22:32:27,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:27,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:27,813 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 72 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-26 22:32:27,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:27,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-26 22:32:27,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 22:32:27,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 22:32:27,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-26 22:32:27,836 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 11 states. [2018-10-26 22:32:28,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:28,190 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-10-26 22:32:28,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 22:32:28,191 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2018-10-26 22:32:28,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:28,192 INFO L225 Difference]: With dead ends: 59 [2018-10-26 22:32:28,192 INFO L226 Difference]: Without dead ends: 44 [2018-10-26 22:32:28,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-26 22:32:28,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-26 22:32:28,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-26 22:32:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-26 22:32:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2018-10-26 22:32:28,199 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 40 [2018-10-26 22:32:28,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:28,199 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2018-10-26 22:32:28,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 22:32:28,199 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2018-10-26 22:32:28,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-26 22:32:28,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:28,200 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 9, 3, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:28,201 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:28,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:28,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1593552847, now seen corresponding path program 8 times [2018-10-26 22:32:28,201 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:28,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:28,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:28,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:28,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 80 proven. 135 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-26 22:32:28,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:28,459 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-26 22:32:28,466 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:32:28,485 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:32:28,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:28,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 80 proven. 135 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-26 22:32:28,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:28,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-26 22:32:28,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 22:32:28,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 22:32:28,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 22:32:28,524 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 12 states. [2018-10-26 22:32:28,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:28,628 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2018-10-26 22:32:28,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 22:32:28,628 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2018-10-26 22:32:28,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:28,630 INFO L225 Difference]: With dead ends: 62 [2018-10-26 22:32:28,630 INFO L226 Difference]: Without dead ends: 47 [2018-10-26 22:32:28,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 22:32:28,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-26 22:32:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-26 22:32:28,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-26 22:32:28,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2018-10-26 22:32:28,637 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 43 [2018-10-26 22:32:28,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:28,638 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2018-10-26 22:32:28,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 22:32:28,638 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2018-10-26 22:32:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-26 22:32:28,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:28,639 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 10, 3, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:28,639 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:28,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:28,640 INFO L82 PathProgramCache]: Analyzing trace with hash -141931124, now seen corresponding path program 9 times [2018-10-26 22:32:28,640 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:28,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:28,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:28,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:28,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 88 proven. 165 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-26 22:32:28,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:28,838 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 [2018-10-26 22:32:28,849 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:32:28,868 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-26 22:32:28,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:28,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 110 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2018-10-26 22:32:28,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:28,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2018-10-26 22:32:28,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 22:32:28,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 22:32:28,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-26 22:32:28,988 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 17 states. [2018-10-26 22:32:29,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:29,083 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2018-10-26 22:32:29,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-26 22:32:29,083 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2018-10-26 22:32:29,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:29,085 INFO L225 Difference]: With dead ends: 69 [2018-10-26 22:32:29,085 INFO L226 Difference]: Without dead ends: 54 [2018-10-26 22:32:29,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-26 22:32:29,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-26 22:32:29,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-10-26 22:32:29,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-26 22:32:29,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2018-10-26 22:32:29,092 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 46 [2018-10-26 22:32:29,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:29,092 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2018-10-26 22:32:29,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 22:32:29,092 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2018-10-26 22:32:29,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-26 22:32:29,093 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:29,093 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 11, 4, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:29,094 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:29,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:29,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1643779282, now seen corresponding path program 10 times [2018-10-26 22:32:29,094 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:29,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:29,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:29,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:29,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 132 proven. 198 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-26 22:32:29,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:29,291 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 [2018-10-26 22:32:29,300 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:32:29,315 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:32:29,315 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:29,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 132 proven. 198 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-26 22:32:29,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:29,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-26 22:32:29,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-26 22:32:29,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-26 22:32:29,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-26 22:32:29,355 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 14 states. [2018-10-26 22:32:29,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:29,424 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2018-10-26 22:32:29,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-26 22:32:29,425 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2018-10-26 22:32:29,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:29,426 INFO L225 Difference]: With dead ends: 74 [2018-10-26 22:32:29,426 INFO L226 Difference]: Without dead ends: 56 [2018-10-26 22:32:29,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-26 22:32:29,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-26 22:32:29,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-26 22:32:29,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-26 22:32:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2018-10-26 22:32:29,433 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 52 [2018-10-26 22:32:29,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:29,434 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2018-10-26 22:32:29,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-26 22:32:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2018-10-26 22:32:29,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-26 22:32:29,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:29,435 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 12, 4, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:29,436 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:29,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:29,436 INFO L82 PathProgramCache]: Analyzing trace with hash 701526545, now seen corresponding path program 11 times [2018-10-26 22:32:29,436 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:29,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:29,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:29,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:29,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 143 proven. 234 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-26 22:32:29,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:29,628 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 [2018-10-26 22:32:29,635 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:32:29,667 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-10-26 22:32:29,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:29,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 143 proven. 234 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-26 22:32:29,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:29,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-26 22:32:29,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-26 22:32:29,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-26 22:32:29,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-26 22:32:29,707 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 15 states. [2018-10-26 22:32:29,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:29,791 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2018-10-26 22:32:29,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 22:32:29,792 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2018-10-26 22:32:29,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:29,793 INFO L225 Difference]: With dead ends: 77 [2018-10-26 22:32:29,793 INFO L226 Difference]: Without dead ends: 59 [2018-10-26 22:32:29,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-26 22:32:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-26 22:32:29,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-26 22:32:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-26 22:32:29,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2018-10-26 22:32:29,799 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 55 [2018-10-26 22:32:29,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:29,800 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2018-10-26 22:32:29,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-26 22:32:29,800 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2018-10-26 22:32:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-26 22:32:29,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:29,801 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 13, 4, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:29,801 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:29,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:29,802 INFO L82 PathProgramCache]: Analyzing trace with hash -820552626, now seen corresponding path program 12 times [2018-10-26 22:32:29,802 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:29,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:29,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:29,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:29,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 154 proven. 273 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-26 22:32:30,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:30,200 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 [2018-10-26 22:32:30,207 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:32:30,231 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-10-26 22:32:30,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:30,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 182 proven. 26 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-10-26 22:32:30,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:30,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7] total 21 [2018-10-26 22:32:30,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-26 22:32:30,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-26 22:32:30,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-26 22:32:30,389 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 21 states. [2018-10-26 22:32:30,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:30,533 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2018-10-26 22:32:30,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-26 22:32:30,533 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2018-10-26 22:32:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:30,534 INFO L225 Difference]: With dead ends: 84 [2018-10-26 22:32:30,535 INFO L226 Difference]: Without dead ends: 66 [2018-10-26 22:32:30,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-26 22:32:30,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-26 22:32:30,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-10-26 22:32:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-26 22:32:30,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2018-10-26 22:32:30,543 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 58 [2018-10-26 22:32:30,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:30,543 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2018-10-26 22:32:30,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-26 22:32:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2018-10-26 22:32:30,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-26 22:32:30,545 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:30,545 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 14, 5, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:30,545 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:30,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:30,549 INFO L82 PathProgramCache]: Analyzing trace with hash -176473684, now seen corresponding path program 13 times [2018-10-26 22:32:30,549 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:30,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:30,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:30,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:30,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 210 proven. 315 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-26 22:32:31,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:31,003 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 [2018-10-26 22:32:31,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:31,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 210 proven. 315 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-26 22:32:31,085 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:31,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-26 22:32:31,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 22:32:31,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 22:32:31,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-26 22:32:31,086 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 17 states. [2018-10-26 22:32:31,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:31,154 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2018-10-26 22:32:31,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-26 22:32:31,155 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2018-10-26 22:32:31,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:31,156 INFO L225 Difference]: With dead ends: 89 [2018-10-26 22:32:31,156 INFO L226 Difference]: Without dead ends: 68 [2018-10-26 22:32:31,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-26 22:32:31,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-26 22:32:31,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-26 22:32:31,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-26 22:32:31,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2018-10-26 22:32:31,163 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 64 [2018-10-26 22:32:31,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:31,163 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2018-10-26 22:32:31,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 22:32:31,163 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2018-10-26 22:32:31,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-26 22:32:31,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:31,164 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 15, 5, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:31,165 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:31,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:31,165 INFO L82 PathProgramCache]: Analyzing trace with hash 903578639, now seen corresponding path program 14 times [2018-10-26 22:32:31,165 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:31,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:31,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:31,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:31,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 224 proven. 360 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-26 22:32:31,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:31,468 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 [2018-10-26 22:32:31,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:32:31,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:32:31,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:31,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 224 proven. 360 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-26 22:32:31,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:31,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-26 22:32:31,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-26 22:32:31,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-26 22:32:31,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-26 22:32:31,584 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 18 states. [2018-10-26 22:32:31,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:31,707 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2018-10-26 22:32:31,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-26 22:32:31,708 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2018-10-26 22:32:31,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:31,709 INFO L225 Difference]: With dead ends: 92 [2018-10-26 22:32:31,709 INFO L226 Difference]: Without dead ends: 71 [2018-10-26 22:32:31,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-26 22:32:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-26 22:32:31,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-26 22:32:31,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-26 22:32:31,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2018-10-26 22:32:31,715 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 67 [2018-10-26 22:32:31,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:31,715 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2018-10-26 22:32:31,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-26 22:32:31,715 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2018-10-26 22:32:31,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-26 22:32:31,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:31,716 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 16, 5, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:31,716 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:31,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:31,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1152648500, now seen corresponding path program 15 times [2018-10-26 22:32:31,717 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:31,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:31,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:31,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:31,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 238 proven. 408 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-26 22:32:31,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:31,972 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-26 22:32:31,979 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:32:31,994 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-26 22:32:31,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:31,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 272 proven. 40 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2018-10-26 22:32:32,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:32,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2018-10-26 22:32:32,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-26 22:32:32,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-26 22:32:32,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-26 22:32:32,157 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 25 states. [2018-10-26 22:32:32,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:32,483 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2018-10-26 22:32:32,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-26 22:32:32,483 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 70 [2018-10-26 22:32:32,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:32,484 INFO L225 Difference]: With dead ends: 99 [2018-10-26 22:32:32,484 INFO L226 Difference]: Without dead ends: 78 [2018-10-26 22:32:32,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-26 22:32:32,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-26 22:32:32,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-10-26 22:32:32,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-26 22:32:32,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2018-10-26 22:32:32,490 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 70 [2018-10-26 22:32:32,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:32,490 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2018-10-26 22:32:32,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-26 22:32:32,490 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2018-10-26 22:32:32,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-26 22:32:32,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:32,491 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 17, 6, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:32,491 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:32,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:32,492 INFO L82 PathProgramCache]: Analyzing trace with hash 767643374, now seen corresponding path program 16 times [2018-10-26 22:32:32,492 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:32,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:32,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:32,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:32,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 306 proven. 459 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-26 22:32:32,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:32,740 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 [2018-10-26 22:32:32,749 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:32:32,768 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:32:32,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:32,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 306 proven. 459 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-26 22:32:32,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:32,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-26 22:32:32,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-26 22:32:32,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-26 22:32:32,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-26 22:32:32,809 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand 20 states. [2018-10-26 22:32:32,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:32,979 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2018-10-26 22:32:32,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-26 22:32:32,980 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 76 [2018-10-26 22:32:32,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:32,981 INFO L225 Difference]: With dead ends: 104 [2018-10-26 22:32:32,981 INFO L226 Difference]: Without dead ends: 80 [2018-10-26 22:32:32,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-26 22:32:32,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-26 22:32:32,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-26 22:32:32,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-26 22:32:32,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2018-10-26 22:32:32,987 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 76 [2018-10-26 22:32:32,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:32,988 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2018-10-26 22:32:32,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-26 22:32:32,988 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2018-10-26 22:32:32,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-26 22:32:32,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:32,989 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 18, 6, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:32,989 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:32,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:32,990 INFO L82 PathProgramCache]: Analyzing trace with hash -89252655, now seen corresponding path program 17 times [2018-10-26 22:32:32,990 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:32,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:32,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:32,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:32,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 323 proven. 513 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-26 22:32:33,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:33,311 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 [2018-10-26 22:32:33,318 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:32:33,355 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-26 22:32:33,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:33,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 323 proven. 513 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-26 22:32:33,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:33,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-26 22:32:33,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-26 22:32:33,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-26 22:32:33,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-26 22:32:33,404 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 21 states. [2018-10-26 22:32:33,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:33,615 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2018-10-26 22:32:33,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-26 22:32:33,615 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 79 [2018-10-26 22:32:33,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:33,617 INFO L225 Difference]: With dead ends: 107 [2018-10-26 22:32:33,617 INFO L226 Difference]: Without dead ends: 83 [2018-10-26 22:32:33,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-26 22:32:33,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-26 22:32:33,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-26 22:32:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-26 22:32:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2018-10-26 22:32:33,622 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 79 [2018-10-26 22:32:33,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:33,623 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2018-10-26 22:32:33,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-26 22:32:33,623 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2018-10-26 22:32:33,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-26 22:32:33,624 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:33,624 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 19, 6, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:33,624 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:33,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:33,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1406754830, now seen corresponding path program 18 times [2018-10-26 22:32:33,625 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:33,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:33,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:33,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:33,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 340 proven. 570 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-26 22:32:34,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:34,526 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 [2018-10-26 22:32:34,534 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:32:34,565 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-26 22:32:34,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:34,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 380 proven. 57 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2018-10-26 22:32:34,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:34,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2018-10-26 22:32:34,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-26 22:32:34,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-26 22:32:34,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-26 22:32:34,771 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 29 states. [2018-10-26 22:32:34,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:34,904 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2018-10-26 22:32:34,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-26 22:32:34,905 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 82 [2018-10-26 22:32:34,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:34,906 INFO L225 Difference]: With dead ends: 114 [2018-10-26 22:32:34,906 INFO L226 Difference]: Without dead ends: 90 [2018-10-26 22:32:34,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-26 22:32:34,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-26 22:32:34,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-10-26 22:32:34,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-26 22:32:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2018-10-26 22:32:34,911 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 82 [2018-10-26 22:32:34,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:34,911 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2018-10-26 22:32:34,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-26 22:32:34,911 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2018-10-26 22:32:34,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-26 22:32:34,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:34,912 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 20, 7, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:34,913 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:34,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:34,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1722496748, now seen corresponding path program 19 times [2018-10-26 22:32:34,913 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:34,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:34,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:34,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:34,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 420 proven. 630 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-26 22:32:35,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:35,270 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 [2018-10-26 22:32:35,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:35,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 420 proven. 630 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-26 22:32:35,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:35,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-26 22:32:35,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-26 22:32:35,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-26 22:32:35,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-26 22:32:35,349 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand 23 states. [2018-10-26 22:32:35,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:35,555 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2018-10-26 22:32:35,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-26 22:32:35,556 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 88 [2018-10-26 22:32:35,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:35,558 INFO L225 Difference]: With dead ends: 119 [2018-10-26 22:32:35,558 INFO L226 Difference]: Without dead ends: 92 [2018-10-26 22:32:35,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-26 22:32:35,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-26 22:32:35,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-26 22:32:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-26 22:32:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2018-10-26 22:32:35,562 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 88 [2018-10-26 22:32:35,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:35,563 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2018-10-26 22:32:35,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-26 22:32:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2018-10-26 22:32:35,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-26 22:32:35,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:35,563 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 21, 7, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:35,564 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:35,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:35,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1678030769, now seen corresponding path program 20 times [2018-10-26 22:32:35,564 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:35,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:35,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:35,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:35,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 440 proven. 693 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-26 22:32:35,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:35,875 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-26 22:32:35,883 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:32:35,906 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:32:35,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:35,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 440 proven. 693 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-26 22:32:35,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:35,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-26 22:32:35,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-26 22:32:35,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-26 22:32:35,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-26 22:32:35,955 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 24 states. [2018-10-26 22:32:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:36,170 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2018-10-26 22:32:36,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-26 22:32:36,171 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 91 [2018-10-26 22:32:36,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:36,172 INFO L225 Difference]: With dead ends: 122 [2018-10-26 22:32:36,172 INFO L226 Difference]: Without dead ends: 95 [2018-10-26 22:32:36,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-26 22:32:36,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-26 22:32:36,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-26 22:32:36,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-26 22:32:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2018-10-26 22:32:36,175 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 91 [2018-10-26 22:32:36,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:36,175 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2018-10-26 22:32:36,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-26 22:32:36,176 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2018-10-26 22:32:36,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-26 22:32:36,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:36,176 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 22, 7, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:36,177 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:36,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:36,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1399678964, now seen corresponding path program 21 times [2018-10-26 22:32:36,177 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:36,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:36,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:36,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:36,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 460 proven. 759 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-26 22:32:36,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:36,734 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 [2018-10-26 22:32:36,742 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:32:36,763 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-26 22:32:36,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:36,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 506 proven. 77 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2018-10-26 22:32:37,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:37,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10] total 33 [2018-10-26 22:32:37,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-26 22:32:37,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-26 22:32:37,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-26 22:32:37,246 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 33 states. [2018-10-26 22:32:37,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:37,424 INFO L93 Difference]: Finished difference Result 129 states and 147 transitions. [2018-10-26 22:32:37,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-26 22:32:37,424 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 94 [2018-10-26 22:32:37,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:37,426 INFO L225 Difference]: With dead ends: 129 [2018-10-26 22:32:37,426 INFO L226 Difference]: Without dead ends: 102 [2018-10-26 22:32:37,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-26 22:32:37,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-26 22:32:37,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2018-10-26 22:32:37,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-26 22:32:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2018-10-26 22:32:37,431 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 94 [2018-10-26 22:32:37,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:37,431 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2018-10-26 22:32:37,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-26 22:32:37,432 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2018-10-26 22:32:37,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-26 22:32:37,432 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:37,432 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 23, 8, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:37,432 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:37,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:37,433 INFO L82 PathProgramCache]: Analyzing trace with hash -183057746, now seen corresponding path program 22 times [2018-10-26 22:32:37,433 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:37,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:37,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:37,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:37,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 552 proven. 828 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-26 22:32:37,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:37,995 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-26 22:32:38,001 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:32:38,026 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:32:38,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:38,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 552 proven. 828 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-26 22:32:38,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:38,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-26 22:32:38,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-26 22:32:38,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-26 22:32:38,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-26 22:32:38,073 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 26 states. [2018-10-26 22:32:38,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:38,182 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2018-10-26 22:32:38,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-26 22:32:38,182 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 100 [2018-10-26 22:32:38,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:38,183 INFO L225 Difference]: With dead ends: 134 [2018-10-26 22:32:38,184 INFO L226 Difference]: Without dead ends: 104 [2018-10-26 22:32:38,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-26 22:32:38,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-26 22:32:38,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-26 22:32:38,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-26 22:32:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2018-10-26 22:32:38,188 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 100 [2018-10-26 22:32:38,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:38,188 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2018-10-26 22:32:38,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-26 22:32:38,189 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2018-10-26 22:32:38,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-26 22:32:38,189 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:38,190 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 24, 8, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:38,190 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:38,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:38,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1568614511, now seen corresponding path program 23 times [2018-10-26 22:32:38,190 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:38,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:38,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:38,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:38,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 575 proven. 900 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-26 22:32:39,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:39,606 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 [2018-10-26 22:32:39,615 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:32:39,661 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2018-10-26 22:32:39,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:39,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 575 proven. 900 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-26 22:32:39,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:39,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-26 22:32:39,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-26 22:32:39,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-26 22:32:39,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-26 22:32:39,705 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 27 states. [2018-10-26 22:32:39,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:39,833 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2018-10-26 22:32:39,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-26 22:32:39,834 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 103 [2018-10-26 22:32:39,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:39,835 INFO L225 Difference]: With dead ends: 137 [2018-10-26 22:32:39,835 INFO L226 Difference]: Without dead ends: 107 [2018-10-26 22:32:39,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-26 22:32:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-26 22:32:39,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-26 22:32:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-26 22:32:39,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2018-10-26 22:32:39,841 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 103 [2018-10-26 22:32:39,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:39,841 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2018-10-26 22:32:39,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-26 22:32:39,841 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2018-10-26 22:32:39,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-26 22:32:39,842 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:39,842 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 25, 8, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:39,842 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:39,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:39,843 INFO L82 PathProgramCache]: Analyzing trace with hash 240481230, now seen corresponding path program 24 times [2018-10-26 22:32:39,843 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:39,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:39,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:39,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:39,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 598 proven. 975 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-26 22:32:40,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:40,255 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 [2018-10-26 22:32:40,269 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:32:40,313 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-26 22:32:40,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:40,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 650 proven. 100 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2018-10-26 22:32:40,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:40,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11] total 37 [2018-10-26 22:32:40,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-26 22:32:40,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-26 22:32:40,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-26 22:32:40,600 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand 37 states. [2018-10-26 22:32:40,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:40,755 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2018-10-26 22:32:40,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-26 22:32:40,755 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 106 [2018-10-26 22:32:40,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:40,756 INFO L225 Difference]: With dead ends: 144 [2018-10-26 22:32:40,757 INFO L226 Difference]: Without dead ends: 114 [2018-10-26 22:32:40,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-26 22:32:40,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-26 22:32:40,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-10-26 22:32:40,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-26 22:32:40,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2018-10-26 22:32:40,761 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 106 [2018-10-26 22:32:40,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:40,762 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2018-10-26 22:32:40,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-26 22:32:40,762 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2018-10-26 22:32:40,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-26 22:32:40,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:40,763 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 26, 9, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:40,763 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:40,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:40,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1909709780, now seen corresponding path program 25 times [2018-10-26 22:32:40,763 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:40,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:40,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:40,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:40,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 702 proven. 1053 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-26 22:32:41,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:41,388 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 [2018-10-26 22:32:41,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:41,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 702 proven. 1053 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-26 22:32:41,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:41,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-26 22:32:41,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-26 22:32:41,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-26 22:32:41,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-26 22:32:41,470 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 29 states. [2018-10-26 22:32:41,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:41,647 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2018-10-26 22:32:41,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-26 22:32:41,647 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 112 [2018-10-26 22:32:41,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:41,648 INFO L225 Difference]: With dead ends: 149 [2018-10-26 22:32:41,648 INFO L226 Difference]: Without dead ends: 116 [2018-10-26 22:32:41,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-26 22:32:41,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-26 22:32:41,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-26 22:32:41,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-26 22:32:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2018-10-26 22:32:41,653 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 112 [2018-10-26 22:32:41,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:41,654 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2018-10-26 22:32:41,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-26 22:32:41,654 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2018-10-26 22:32:41,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-26 22:32:41,655 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:41,655 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 27, 9, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:41,655 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:41,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:41,655 INFO L82 PathProgramCache]: Analyzing trace with hash 658963599, now seen corresponding path program 26 times [2018-10-26 22:32:41,655 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:41,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:41,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:41,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:41,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 728 proven. 1134 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-26 22:32:42,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:42,131 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 [2018-10-26 22:32:42,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:32:42,168 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:32:42,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:42,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 728 proven. 1134 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-26 22:32:42,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:42,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-26 22:32:42,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-26 22:32:42,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-26 22:32:42,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-26 22:32:42,211 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand 30 states. [2018-10-26 22:32:42,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:42,427 INFO L93 Difference]: Finished difference Result 152 states and 171 transitions. [2018-10-26 22:32:42,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-26 22:32:42,428 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 115 [2018-10-26 22:32:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:42,429 INFO L225 Difference]: With dead ends: 152 [2018-10-26 22:32:42,430 INFO L226 Difference]: Without dead ends: 119 [2018-10-26 22:32:42,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-26 22:32:42,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-26 22:32:42,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-26 22:32:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-26 22:32:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 128 transitions. [2018-10-26 22:32:42,438 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 128 transitions. Word has length 115 [2018-10-26 22:32:42,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:42,438 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 128 transitions. [2018-10-26 22:32:42,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-26 22:32:42,438 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 128 transitions. [2018-10-26 22:32:42,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-26 22:32:42,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:42,439 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 28, 9, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:42,441 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:42,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:42,442 INFO L82 PathProgramCache]: Analyzing trace with hash 575284556, now seen corresponding path program 27 times [2018-10-26 22:32:42,442 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:42,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:42,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:42,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:42,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 754 proven. 1218 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-26 22:32:43,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:43,043 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-26 22:32:43,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:32:43,083 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-26 22:32:43,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:43,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 812 proven. 126 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2018-10-26 22:32:43,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:43,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2018-10-26 22:32:43,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-26 22:32:43,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-26 22:32:43,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-26 22:32:43,472 INFO L87 Difference]: Start difference. First operand 119 states and 128 transitions. Second operand 41 states. [2018-10-26 22:32:43,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:43,760 INFO L93 Difference]: Finished difference Result 159 states and 181 transitions. [2018-10-26 22:32:43,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-26 22:32:43,761 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 118 [2018-10-26 22:32:43,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:43,763 INFO L225 Difference]: With dead ends: 159 [2018-10-26 22:32:43,763 INFO L226 Difference]: Without dead ends: 126 [2018-10-26 22:32:43,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-26 22:32:43,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-26 22:32:43,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2018-10-26 22:32:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-26 22:32:43,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2018-10-26 22:32:43,769 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 118 [2018-10-26 22:32:43,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:43,769 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2018-10-26 22:32:43,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-26 22:32:43,769 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2018-10-26 22:32:43,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-26 22:32:43,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:43,770 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 29, 10, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:43,770 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:43,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:43,770 INFO L82 PathProgramCache]: Analyzing trace with hash 647644782, now seen corresponding path program 28 times [2018-10-26 22:32:43,770 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:43,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:43,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:43,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:43,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 870 proven. 1305 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-26 22:32:44,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:44,250 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 [2018-10-26 22:32:44,258 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:32:44,287 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:32:44,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:44,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 870 proven. 1305 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-26 22:32:44,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:44,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-26 22:32:44,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-26 22:32:44,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-26 22:32:44,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-26 22:32:44,329 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand 32 states. [2018-10-26 22:32:44,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:44,462 INFO L93 Difference]: Finished difference Result 164 states and 185 transitions. [2018-10-26 22:32:44,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-26 22:32:44,462 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 124 [2018-10-26 22:32:44,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:44,464 INFO L225 Difference]: With dead ends: 164 [2018-10-26 22:32:44,464 INFO L226 Difference]: Without dead ends: 128 [2018-10-26 22:32:44,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-26 22:32:44,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-26 22:32:44,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-26 22:32:44,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-26 22:32:44,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2018-10-26 22:32:44,469 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 124 [2018-10-26 22:32:44,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:44,469 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2018-10-26 22:32:44,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-26 22:32:44,469 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2018-10-26 22:32:44,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-26 22:32:44,470 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:44,470 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 30, 10, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:44,470 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:44,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:44,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1294163375, now seen corresponding path program 29 times [2018-10-26 22:32:44,470 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:44,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:44,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:44,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:44,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 899 proven. 1395 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-26 22:32:44,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:44,982 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 [2018-10-26 22:32:44,990 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:32:45,051 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2018-10-26 22:32:45,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:45,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 899 proven. 1395 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-26 22:32:45,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:45,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-26 22:32:45,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-26 22:32:45,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-26 22:32:45,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-26 22:32:45,100 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand 33 states. [2018-10-26 22:32:45,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:45,235 INFO L93 Difference]: Finished difference Result 167 states and 188 transitions. [2018-10-26 22:32:45,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-26 22:32:45,236 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 127 [2018-10-26 22:32:45,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:45,237 INFO L225 Difference]: With dead ends: 167 [2018-10-26 22:32:45,237 INFO L226 Difference]: Without dead ends: 131 [2018-10-26 22:32:45,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-26 22:32:45,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-26 22:32:45,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-26 22:32:45,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-26 22:32:45,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2018-10-26 22:32:45,242 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 127 [2018-10-26 22:32:45,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:45,242 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2018-10-26 22:32:45,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-26 22:32:45,243 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2018-10-26 22:32:45,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-26 22:32:45,243 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:45,243 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 31, 10, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:45,244 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:45,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:45,244 INFO L82 PathProgramCache]: Analyzing trace with hash -786458738, now seen corresponding path program 30 times [2018-10-26 22:32:45,244 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:45,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:45,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:45,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:45,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 928 proven. 1488 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-26 22:32:45,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:45,708 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 [2018-10-26 22:32:45,716 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:32:45,777 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2018-10-26 22:32:45,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:45,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 992 proven. 155 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-26 22:32:46,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:46,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 13] total 45 [2018-10-26 22:32:46,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-26 22:32:46,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-26 22:32:46,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-26 22:32:46,159 INFO L87 Difference]: Start difference. First operand 131 states and 141 transitions. Second operand 45 states. [2018-10-26 22:32:46,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:46,392 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2018-10-26 22:32:46,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-26 22:32:46,393 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 130 [2018-10-26 22:32:46,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:46,394 INFO L225 Difference]: With dead ends: 174 [2018-10-26 22:32:46,394 INFO L226 Difference]: Without dead ends: 138 [2018-10-26 22:32:46,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-26 22:32:46,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-26 22:32:46,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-10-26 22:32:46,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-26 22:32:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2018-10-26 22:32:46,400 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 130 [2018-10-26 22:32:46,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:46,400 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2018-10-26 22:32:46,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-26 22:32:46,400 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2018-10-26 22:32:46,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-26 22:32:46,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:46,401 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 32, 11, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:46,401 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:46,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:46,402 INFO L82 PathProgramCache]: Analyzing trace with hash 568983916, now seen corresponding path program 31 times [2018-10-26 22:32:46,402 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:46,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:46,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:46,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:46,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 1056 proven. 1584 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-10-26 22:32:46,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:46,928 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 [2018-10-26 22:32:46,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:46,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 1056 proven. 1584 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-10-26 22:32:47,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:47,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-26 22:32:47,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-26 22:32:47,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-26 22:32:47,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-26 22:32:47,011 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 35 states. [2018-10-26 22:32:47,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:47,188 INFO L93 Difference]: Finished difference Result 179 states and 202 transitions. [2018-10-26 22:32:47,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-26 22:32:47,188 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 136 [2018-10-26 22:32:47,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:47,191 INFO L225 Difference]: With dead ends: 179 [2018-10-26 22:32:47,191 INFO L226 Difference]: Without dead ends: 140 [2018-10-26 22:32:47,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-26 22:32:47,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-26 22:32:47,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-26 22:32:47,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-26 22:32:47,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 151 transitions. [2018-10-26 22:32:47,196 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 151 transitions. Word has length 136 [2018-10-26 22:32:47,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:47,196 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 151 transitions. [2018-10-26 22:32:47,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-26 22:32:47,197 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 151 transitions. [2018-10-26 22:32:47,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-26 22:32:47,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:47,197 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 33, 11, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:47,198 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:47,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:47,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1823121615, now seen corresponding path program 32 times [2018-10-26 22:32:47,198 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:47,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:47,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:47,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:47,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 1088 proven. 1683 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-10-26 22:32:47,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:47,805 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 [2018-10-26 22:32:47,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:32:47,844 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:32:47,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:47,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 1088 proven. 1683 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-10-26 22:32:47,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:47,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-26 22:32:47,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-26 22:32:47,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-26 22:32:47,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 22:32:47,898 INFO L87 Difference]: Start difference. First operand 140 states and 151 transitions. Second operand 36 states. [2018-10-26 22:32:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:48,073 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2018-10-26 22:32:48,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-26 22:32:48,073 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 139 [2018-10-26 22:32:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:48,074 INFO L225 Difference]: With dead ends: 182 [2018-10-26 22:32:48,075 INFO L226 Difference]: Without dead ends: 143 [2018-10-26 22:32:48,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 22:32:48,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-26 22:32:48,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-26 22:32:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-26 22:32:48,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 154 transitions. [2018-10-26 22:32:48,080 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 154 transitions. Word has length 139 [2018-10-26 22:32:48,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:48,080 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 154 transitions. [2018-10-26 22:32:48,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-26 22:32:48,081 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 154 transitions. [2018-10-26 22:32:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-26 22:32:48,081 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:48,081 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 34, 11, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:48,082 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:48,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:48,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1918804620, now seen corresponding path program 33 times [2018-10-26 22:32:48,082 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:48,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:48,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:48,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:48,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 1120 proven. 1785 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-10-26 22:32:49,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:49,108 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 [2018-10-26 22:32:49,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:32:49,144 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-26 22:32:49,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:49,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 1190 proven. 187 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2018-10-26 22:32:49,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:49,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14] total 49 [2018-10-26 22:32:49,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-26 22:32:49,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-26 22:32:49,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-26 22:32:49,528 INFO L87 Difference]: Start difference. First operand 143 states and 154 transitions. Second operand 49 states. [2018-10-26 22:32:50,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:50,694 INFO L93 Difference]: Finished difference Result 189 states and 215 transitions. [2018-10-26 22:32:50,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-26 22:32:50,695 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 142 [2018-10-26 22:32:50,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:50,696 INFO L225 Difference]: With dead ends: 189 [2018-10-26 22:32:50,696 INFO L226 Difference]: Without dead ends: 150 [2018-10-26 22:32:50,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-26 22:32:50,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-26 22:32:50,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2018-10-26 22:32:50,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-26 22:32:50,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 161 transitions. [2018-10-26 22:32:50,703 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 161 transitions. Word has length 142 [2018-10-26 22:32:50,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:50,703 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 161 transitions. [2018-10-26 22:32:50,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-26 22:32:50,703 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 161 transitions. [2018-10-26 22:32:50,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-26 22:32:50,704 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:50,704 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 35, 12, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:50,704 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:50,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:50,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1780491730, now seen corresponding path program 34 times [2018-10-26 22:32:50,705 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:50,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:50,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:50,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:50,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 1260 proven. 1890 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-10-26 22:32:51,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:51,358 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 [2018-10-26 22:32:51,365 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:32:51,413 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:32:51,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:51,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 1260 proven. 1890 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-10-26 22:32:51,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:51,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-26 22:32:51,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-26 22:32:51,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-26 22:32:51,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 22:32:51,468 INFO L87 Difference]: Start difference. First operand 149 states and 161 transitions. Second operand 38 states. [2018-10-26 22:32:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:51,718 INFO L93 Difference]: Finished difference Result 194 states and 219 transitions. [2018-10-26 22:32:51,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-26 22:32:51,719 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 148 [2018-10-26 22:32:51,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:51,720 INFO L225 Difference]: With dead ends: 194 [2018-10-26 22:32:51,720 INFO L226 Difference]: Without dead ends: 152 [2018-10-26 22:32:51,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 22:32:51,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-26 22:32:51,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-10-26 22:32:51,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-26 22:32:51,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 164 transitions. [2018-10-26 22:32:51,726 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 164 transitions. Word has length 148 [2018-10-26 22:32:51,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:51,727 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 164 transitions. [2018-10-26 22:32:51,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-26 22:32:51,727 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 164 transitions. [2018-10-26 22:32:51,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-26 22:32:51,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:51,728 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 36, 12, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:51,728 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:51,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:51,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1582660881, now seen corresponding path program 35 times [2018-10-26 22:32:51,729 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:51,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:51,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:51,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:51,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 1295 proven. 1998 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-10-26 22:32:52,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:52,666 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 [2018-10-26 22:32:52,674 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:32:52,745 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-26 22:32:52,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:52,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 1295 proven. 1998 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-10-26 22:32:52,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:52,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-26 22:32:52,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-26 22:32:52,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-26 22:32:52,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-26 22:32:52,796 INFO L87 Difference]: Start difference. First operand 152 states and 164 transitions. Second operand 39 states. [2018-10-26 22:32:52,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:52,949 INFO L93 Difference]: Finished difference Result 197 states and 222 transitions. [2018-10-26 22:32:52,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-26 22:32:52,951 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 151 [2018-10-26 22:32:52,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:52,952 INFO L225 Difference]: With dead ends: 197 [2018-10-26 22:32:52,952 INFO L226 Difference]: Without dead ends: 155 [2018-10-26 22:32:52,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-26 22:32:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-26 22:32:52,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-26 22:32:52,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-26 22:32:52,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 167 transitions. [2018-10-26 22:32:52,957 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 167 transitions. Word has length 151 [2018-10-26 22:32:52,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:52,957 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 167 transitions. [2018-10-26 22:32:52,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-26 22:32:52,958 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 167 transitions. [2018-10-26 22:32:52,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-26 22:32:52,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:52,959 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 37, 12, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:52,959 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:52,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:52,959 INFO L82 PathProgramCache]: Analyzing trace with hash 265014094, now seen corresponding path program 36 times [2018-10-26 22:32:52,959 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:52,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:52,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:52,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:52,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 1330 proven. 2109 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-10-26 22:32:54,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:54,490 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 [2018-10-26 22:32:54,497 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:32:54,555 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-10-26 22:32:54,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:54,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 1406 proven. 222 refuted. 0 times theorem prover too weak. 1998 trivial. 0 not checked. [2018-10-26 22:32:55,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:55,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 15] total 53 [2018-10-26 22:32:55,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-26 22:32:55,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-26 22:32:55,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-26 22:32:55,012 INFO L87 Difference]: Start difference. First operand 155 states and 167 transitions. Second operand 53 states. [2018-10-26 22:32:55,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:55,306 INFO L93 Difference]: Finished difference Result 204 states and 232 transitions. [2018-10-26 22:32:55,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-26 22:32:55,306 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 154 [2018-10-26 22:32:55,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:55,308 INFO L225 Difference]: With dead ends: 204 [2018-10-26 22:32:55,308 INFO L226 Difference]: Without dead ends: 162 [2018-10-26 22:32:55,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-26 22:32:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-26 22:32:55,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-10-26 22:32:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-26 22:32:55,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 174 transitions. [2018-10-26 22:32:55,313 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 174 transitions. Word has length 154 [2018-10-26 22:32:55,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:55,314 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 174 transitions. [2018-10-26 22:32:55,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-26 22:32:55,314 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 174 transitions. [2018-10-26 22:32:55,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-26 22:32:55,315 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:55,315 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 38, 13, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:55,315 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:55,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:55,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1764700500, now seen corresponding path program 37 times [2018-10-26 22:32:55,316 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:55,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:55,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:55,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:55,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 1482 proven. 2223 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-26 22:32:56,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:56,133 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 [2018-10-26 22:32:56,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:56,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 1482 proven. 2223 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-26 22:32:56,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:56,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-26 22:32:56,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-26 22:32:56,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-26 22:32:56,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-26 22:32:56,249 INFO L87 Difference]: Start difference. First operand 161 states and 174 transitions. Second operand 41 states. [2018-10-26 22:32:56,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:56,422 INFO L93 Difference]: Finished difference Result 209 states and 236 transitions. [2018-10-26 22:32:56,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-26 22:32:56,422 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 160 [2018-10-26 22:32:56,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:56,424 INFO L225 Difference]: With dead ends: 209 [2018-10-26 22:32:56,424 INFO L226 Difference]: Without dead ends: 164 [2018-10-26 22:32:56,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-26 22:32:56,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-26 22:32:56,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-10-26 22:32:56,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-26 22:32:56,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 177 transitions. [2018-10-26 22:32:56,431 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 177 transitions. Word has length 160 [2018-10-26 22:32:56,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:56,431 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 177 transitions. [2018-10-26 22:32:56,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-26 22:32:56,431 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 177 transitions. [2018-10-26 22:32:56,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-26 22:32:56,432 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:56,432 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 39, 13, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:56,432 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:56,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:56,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1072548593, now seen corresponding path program 38 times [2018-10-26 22:32:56,433 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:56,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:56,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:56,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:56,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 1520 proven. 2340 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-26 22:32:59,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:59,125 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 [2018-10-26 22:32:59,133 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:32:59,168 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:32:59,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:59,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 1520 proven. 2340 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-26 22:32:59,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:59,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-26 22:32:59,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-26 22:32:59,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-26 22:32:59,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-26 22:32:59,240 INFO L87 Difference]: Start difference. First operand 164 states and 177 transitions. Second operand 42 states. [2018-10-26 22:33:00,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:00,493 INFO L93 Difference]: Finished difference Result 212 states and 239 transitions. [2018-10-26 22:33:00,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-26 22:33:00,494 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 163 [2018-10-26 22:33:00,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:00,495 INFO L225 Difference]: With dead ends: 212 [2018-10-26 22:33:00,495 INFO L226 Difference]: Without dead ends: 167 [2018-10-26 22:33:00,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-26 22:33:00,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-26 22:33:00,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-26 22:33:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-26 22:33:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 180 transitions. [2018-10-26 22:33:00,501 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 180 transitions. Word has length 163 [2018-10-26 22:33:00,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:00,501 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 180 transitions. [2018-10-26 22:33:00,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-26 22:33:00,501 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 180 transitions. [2018-10-26 22:33:00,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-26 22:33:00,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:00,502 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 40, 13, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:00,502 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:00,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:00,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1313075252, now seen corresponding path program 39 times [2018-10-26 22:33:00,503 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:00,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:00,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:00,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:00,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 1558 proven. 2460 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-26 22:33:01,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:01,460 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 [2018-10-26 22:33:01,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:33:01,502 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-26 22:33:01,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:01,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 1640 proven. 260 refuted. 0 times theorem prover too weak. 2340 trivial. 0 not checked. [2018-10-26 22:33:03,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:03,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 16] total 57 [2018-10-26 22:33:03,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-26 22:33:03,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-26 22:33:03,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-26 22:33:03,234 INFO L87 Difference]: Start difference. First operand 167 states and 180 transitions. Second operand 57 states. [2018-10-26 22:33:03,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:03,504 INFO L93 Difference]: Finished difference Result 219 states and 249 transitions. [2018-10-26 22:33:03,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-26 22:33:03,505 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 166 [2018-10-26 22:33:03,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:03,506 INFO L225 Difference]: With dead ends: 219 [2018-10-26 22:33:03,506 INFO L226 Difference]: Without dead ends: 174 [2018-10-26 22:33:03,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-26 22:33:03,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-26 22:33:03,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2018-10-26 22:33:03,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-26 22:33:03,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 187 transitions. [2018-10-26 22:33:03,511 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 187 transitions. Word has length 166 [2018-10-26 22:33:03,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:03,511 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 187 transitions. [2018-10-26 22:33:03,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-26 22:33:03,511 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 187 transitions. [2018-10-26 22:33:03,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-26 22:33:03,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:03,512 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 41, 14, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:03,512 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:03,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:03,513 INFO L82 PathProgramCache]: Analyzing trace with hash -142901778, now seen corresponding path program 40 times [2018-10-26 22:33:03,513 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:03,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:03,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:03,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:03,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 1722 proven. 2583 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-10-26 22:33:04,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:04,743 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 [2018-10-26 22:33:04,751 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:33:04,795 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:33:04,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:04,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 1722 proven. 2583 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-10-26 22:33:04,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:04,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-26 22:33:04,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-26 22:33:04,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-26 22:33:04,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-26 22:33:04,852 INFO L87 Difference]: Start difference. First operand 173 states and 187 transitions. Second operand 44 states. [2018-10-26 22:33:05,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:05,018 INFO L93 Difference]: Finished difference Result 224 states and 253 transitions. [2018-10-26 22:33:05,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-26 22:33:05,019 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 172 [2018-10-26 22:33:05,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:05,020 INFO L225 Difference]: With dead ends: 224 [2018-10-26 22:33:05,021 INFO L226 Difference]: Without dead ends: 176 [2018-10-26 22:33:05,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-26 22:33:05,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-26 22:33:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-10-26 22:33:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-26 22:33:05,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 190 transitions. [2018-10-26 22:33:05,027 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 190 transitions. Word has length 172 [2018-10-26 22:33:05,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:05,027 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 190 transitions. [2018-10-26 22:33:05,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-26 22:33:05,027 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 190 transitions. [2018-10-26 22:33:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-26 22:33:05,028 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:05,028 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 42, 14, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:05,028 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:05,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1199609903, now seen corresponding path program 41 times [2018-10-26 22:33:05,029 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:05,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:05,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:05,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:05,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 1763 proven. 2709 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-10-26 22:33:06,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:06,115 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 [2018-10-26 22:33:06,122 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:33:06,212 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 57 check-sat command(s) [2018-10-26 22:33:06,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:06,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 1763 proven. 2709 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-10-26 22:33:06,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:06,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-26 22:33:06,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-26 22:33:06,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-26 22:33:06,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-26 22:33:06,274 INFO L87 Difference]: Start difference. First operand 176 states and 190 transitions. Second operand 45 states. [2018-10-26 22:33:06,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:06,462 INFO L93 Difference]: Finished difference Result 227 states and 256 transitions. [2018-10-26 22:33:06,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-26 22:33:06,467 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 175 [2018-10-26 22:33:06,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:06,468 INFO L225 Difference]: With dead ends: 227 [2018-10-26 22:33:06,468 INFO L226 Difference]: Without dead ends: 179 [2018-10-26 22:33:06,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-26 22:33:06,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-26 22:33:06,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-26 22:33:06,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-26 22:33:06,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 193 transitions. [2018-10-26 22:33:06,473 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 193 transitions. Word has length 175 [2018-10-26 22:33:06,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:06,473 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 193 transitions. [2018-10-26 22:33:06,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-26 22:33:06,473 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 193 transitions. [2018-10-26 22:33:06,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-26 22:33:06,474 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:06,474 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 43, 14, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:06,475 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:06,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:06,475 INFO L82 PathProgramCache]: Analyzing trace with hash 518917902, now seen corresponding path program 42 times [2018-10-26 22:33:06,475 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:06,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:06,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:06,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:06,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 1804 proven. 2838 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-10-26 22:33:07,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:07,419 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 [2018-10-26 22:33:07,428 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:33:07,501 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2018-10-26 22:33:07,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:07,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 1892 proven. 301 refuted. 0 times theorem prover too weak. 2709 trivial. 0 not checked. [2018-10-26 22:33:08,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:08,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 17] total 61 [2018-10-26 22:33:08,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-26 22:33:08,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-26 22:33:08,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-26 22:33:08,073 INFO L87 Difference]: Start difference. First operand 179 states and 193 transitions. Second operand 61 states. [2018-10-26 22:33:08,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:08,373 INFO L93 Difference]: Finished difference Result 234 states and 266 transitions. [2018-10-26 22:33:08,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-26 22:33:08,374 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 178 [2018-10-26 22:33:08,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:08,375 INFO L225 Difference]: With dead ends: 234 [2018-10-26 22:33:08,375 INFO L226 Difference]: Without dead ends: 186 [2018-10-26 22:33:08,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-26 22:33:08,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-26 22:33:08,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2018-10-26 22:33:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-26 22:33:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 200 transitions. [2018-10-26 22:33:08,381 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 200 transitions. Word has length 178 [2018-10-26 22:33:08,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:08,381 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 200 transitions. [2018-10-26 22:33:08,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-26 22:33:08,381 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 200 transitions. [2018-10-26 22:33:08,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-26 22:33:08,382 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:08,382 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 44, 15, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:08,382 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:08,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:08,383 INFO L82 PathProgramCache]: Analyzing trace with hash -523465748, now seen corresponding path program 43 times [2018-10-26 22:33:08,383 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:08,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:08,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:08,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:08,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 1980 proven. 2970 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-10-26 22:33:09,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:09,609 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 [2018-10-26 22:33:09,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:09,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:09,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 1980 proven. 2970 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-10-26 22:33:09,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:09,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-26 22:33:09,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-26 22:33:09,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-26 22:33:09,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-26 22:33:09,720 INFO L87 Difference]: Start difference. First operand 185 states and 200 transitions. Second operand 47 states. [2018-10-26 22:33:09,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:09,915 INFO L93 Difference]: Finished difference Result 239 states and 270 transitions. [2018-10-26 22:33:09,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-26 22:33:09,915 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 184 [2018-10-26 22:33:09,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:09,916 INFO L225 Difference]: With dead ends: 239 [2018-10-26 22:33:09,916 INFO L226 Difference]: Without dead ends: 188 [2018-10-26 22:33:09,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-26 22:33:09,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-10-26 22:33:09,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2018-10-26 22:33:09,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-10-26 22:33:09,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 203 transitions. [2018-10-26 22:33:09,920 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 203 transitions. Word has length 184 [2018-10-26 22:33:09,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:09,920 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 203 transitions. [2018-10-26 22:33:09,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-26 22:33:09,921 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 203 transitions. [2018-10-26 22:33:09,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-26 22:33:09,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:09,921 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 45, 15, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:09,922 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:09,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:09,922 INFO L82 PathProgramCache]: Analyzing trace with hash -194397873, now seen corresponding path program 44 times [2018-10-26 22:33:09,922 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:09,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:09,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:09,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:09,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 2024 proven. 3105 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-10-26 22:33:11,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:11,071 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 [2018-10-26 22:33:11,079 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:33:11,123 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:33:11,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:11,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 2024 proven. 3105 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-10-26 22:33:11,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:11,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-26 22:33:11,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-26 22:33:11,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-26 22:33:11,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-26 22:33:11,202 INFO L87 Difference]: Start difference. First operand 188 states and 203 transitions. Second operand 48 states. [2018-10-26 22:33:11,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:11,405 INFO L93 Difference]: Finished difference Result 242 states and 273 transitions. [2018-10-26 22:33:11,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-26 22:33:11,405 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 187 [2018-10-26 22:33:11,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:11,406 INFO L225 Difference]: With dead ends: 242 [2018-10-26 22:33:11,406 INFO L226 Difference]: Without dead ends: 191 [2018-10-26 22:33:11,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-26 22:33:11,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-26 22:33:11,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-26 22:33:11,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-26 22:33:11,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 206 transitions. [2018-10-26 22:33:11,410 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 206 transitions. Word has length 187 [2018-10-26 22:33:11,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:11,411 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 206 transitions. [2018-10-26 22:33:11,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-26 22:33:11,411 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 206 transitions. [2018-10-26 22:33:11,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-26 22:33:11,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:11,412 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 46, 15, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:11,412 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:11,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:11,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1951296780, now seen corresponding path program 45 times [2018-10-26 22:33:11,412 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:11,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:11,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:11,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:11,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 2068 proven. 3243 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-10-26 22:33:12,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:12,369 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 [2018-10-26 22:33:12,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:33:12,421 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-26 22:33:12,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:12,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 2162 proven. 345 refuted. 0 times theorem prover too weak. 3105 trivial. 0 not checked. [2018-10-26 22:33:13,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:13,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 18] total 65 [2018-10-26 22:33:13,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-26 22:33:13,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-26 22:33:13,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-26 22:33:13,487 INFO L87 Difference]: Start difference. First operand 191 states and 206 transitions. Second operand 65 states. [2018-10-26 22:33:13,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:13,819 INFO L93 Difference]: Finished difference Result 249 states and 283 transitions. [2018-10-26 22:33:13,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-26 22:33:13,820 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 190 [2018-10-26 22:33:13,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:13,821 INFO L225 Difference]: With dead ends: 249 [2018-10-26 22:33:13,821 INFO L226 Difference]: Without dead ends: 198 [2018-10-26 22:33:13,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-26 22:33:13,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-10-26 22:33:13,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2018-10-26 22:33:13,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-26 22:33:13,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 213 transitions. [2018-10-26 22:33:13,827 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 213 transitions. Word has length 190 [2018-10-26 22:33:13,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:13,827 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 213 transitions. [2018-10-26 22:33:13,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-26 22:33:13,827 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 213 transitions. [2018-10-26 22:33:13,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-26 22:33:13,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:13,828 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 47, 16, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:13,829 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:13,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:13,829 INFO L82 PathProgramCache]: Analyzing trace with hash 553726382, now seen corresponding path program 46 times [2018-10-26 22:33:13,829 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:13,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:13,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:13,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:13,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 2256 proven. 3384 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-26 22:33:15,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:15,339 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 [2018-10-26 22:33:15,359 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:33:15,401 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:33:15,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:15,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 2256 proven. 3384 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-26 22:33:15,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:15,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-26 22:33:15,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-26 22:33:15,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-26 22:33:15,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-26 22:33:15,460 INFO L87 Difference]: Start difference. First operand 197 states and 213 transitions. Second operand 50 states. [2018-10-26 22:33:16,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:16,531 INFO L93 Difference]: Finished difference Result 254 states and 287 transitions. [2018-10-26 22:33:16,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-26 22:33:16,532 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 196 [2018-10-26 22:33:16,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:16,533 INFO L225 Difference]: With dead ends: 254 [2018-10-26 22:33:16,533 INFO L226 Difference]: Without dead ends: 200 [2018-10-26 22:33:16,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-26 22:33:16,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-10-26 22:33:16,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-10-26 22:33:16,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-26 22:33:16,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 216 transitions. [2018-10-26 22:33:16,541 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 216 transitions. Word has length 196 [2018-10-26 22:33:16,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:16,541 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 216 transitions. [2018-10-26 22:33:16,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-26 22:33:16,541 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 216 transitions. [2018-10-26 22:33:16,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-10-26 22:33:16,543 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:16,543 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 48, 16, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:16,543 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:16,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:16,543 INFO L82 PathProgramCache]: Analyzing trace with hash -168926575, now seen corresponding path program 47 times [2018-10-26 22:33:16,543 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:16,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:16,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:16,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:16,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 2303 proven. 3528 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-26 22:33:18,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:18,881 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 [2018-10-26 22:33:18,888 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:33:18,988 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2018-10-26 22:33:18,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:18,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 2303 proven. 3528 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-26 22:33:19,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:19,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-26 22:33:19,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-26 22:33:19,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-26 22:33:19,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-26 22:33:19,055 INFO L87 Difference]: Start difference. First operand 200 states and 216 transitions. Second operand 51 states. [2018-10-26 22:33:19,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:19,326 INFO L93 Difference]: Finished difference Result 257 states and 290 transitions. [2018-10-26 22:33:19,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-26 22:33:19,327 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 199 [2018-10-26 22:33:19,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:19,328 INFO L225 Difference]: With dead ends: 257 [2018-10-26 22:33:19,328 INFO L226 Difference]: Without dead ends: 203 [2018-10-26 22:33:19,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-26 22:33:19,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-26 22:33:19,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-26 22:33:19,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-26 22:33:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 219 transitions. [2018-10-26 22:33:19,333 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 219 transitions. Word has length 199 [2018-10-26 22:33:19,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:19,333 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 219 transitions. [2018-10-26 22:33:19,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-26 22:33:19,333 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 219 transitions. [2018-10-26 22:33:19,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-26 22:33:19,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:19,334 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 49, 16, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:19,335 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:19,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:19,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1947886286, now seen corresponding path program 48 times [2018-10-26 22:33:19,335 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:19,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:19,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:19,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:19,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 2350 proven. 3675 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-26 22:33:21,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:21,154 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 [2018-10-26 22:33:21,161 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:33:21,243 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2018-10-26 22:33:21,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:21,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 2450 proven. 392 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2018-10-26 22:33:22,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:22,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 19] total 69 [2018-10-26 22:33:22,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-26 22:33:22,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-26 22:33:22,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-26 22:33:22,081 INFO L87 Difference]: Start difference. First operand 203 states and 219 transitions. Second operand 69 states. [2018-10-26 22:33:22,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:22,533 INFO L93 Difference]: Finished difference Result 264 states and 300 transitions. [2018-10-26 22:33:22,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-26 22:33:22,534 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 202 [2018-10-26 22:33:22,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:22,536 INFO L225 Difference]: With dead ends: 264 [2018-10-26 22:33:22,536 INFO L226 Difference]: Without dead ends: 210 [2018-10-26 22:33:22,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-26 22:33:22,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-10-26 22:33:22,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2018-10-26 22:33:22,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-26 22:33:22,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 226 transitions. [2018-10-26 22:33:22,541 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 226 transitions. Word has length 202 [2018-10-26 22:33:22,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:22,541 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 226 transitions. [2018-10-26 22:33:22,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-26 22:33:22,541 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 226 transitions. [2018-10-26 22:33:22,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-26 22:33:22,542 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:22,543 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 50, 17, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:22,543 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:22,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:22,543 INFO L82 PathProgramCache]: Analyzing trace with hash 852048172, now seen corresponding path program 49 times [2018-10-26 22:33:22,543 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:22,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:22,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:22,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:22,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 2832 proven. 551 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-10-26 22:33:23,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:23,077 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 [2018-10-26 22:33:23,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:23,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:25,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:25,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 70] total 72 [2018-10-26 22:33:25,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-26 22:33:25,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-26 22:33:25,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-26 22:33:25,711 INFO L87 Difference]: Start difference. First operand 209 states and 226 transitions. Second operand 72 states. [2018-10-26 22:33:26,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:26,003 INFO L93 Difference]: Finished difference Result 223 states and 246 transitions. [2018-10-26 22:33:26,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-26 22:33:26,003 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 208 [2018-10-26 22:33:26,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:26,005 INFO L225 Difference]: With dead ends: 223 [2018-10-26 22:33:26,005 INFO L226 Difference]: Without dead ends: 219 [2018-10-26 22:33:26,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-26 22:33:26,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-26 22:33:26,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2018-10-26 22:33:26,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-10-26 22:33:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 238 transitions. [2018-10-26 22:33:26,011 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 238 transitions. Word has length 208 [2018-10-26 22:33:26,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:26,012 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 238 transitions. [2018-10-26 22:33:26,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-26 22:33:26,012 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 238 transitions. [2018-10-26 22:33:26,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-26 22:33:26,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:26,014 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 50, 20, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:26,014 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:26,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:26,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1868974513, now seen corresponding path program 50 times [2018-10-26 22:33:26,014 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:26,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:26,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:26,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:26,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 3264 proven. 737 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-10-26 22:33:26,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:26,425 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 [2018-10-26 22:33:26,433 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:33:26,482 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:33:26,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:26,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:27,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:27,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 73] total 75 [2018-10-26 22:33:27,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-26 22:33:27,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-26 22:33:27,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-26 22:33:27,566 INFO L87 Difference]: Start difference. First operand 218 states and 238 transitions. Second operand 75 states. [2018-10-26 22:33:27,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:27,968 INFO L93 Difference]: Finished difference Result 232 states and 258 transitions. [2018-10-26 22:33:27,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-26 22:33:27,968 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 217 [2018-10-26 22:33:27,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:27,970 INFO L225 Difference]: With dead ends: 232 [2018-10-26 22:33:27,970 INFO L226 Difference]: Without dead ends: 228 [2018-10-26 22:33:27,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2200 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-26 22:33:27,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-26 22:33:27,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2018-10-26 22:33:27,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-26 22:33:27,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 250 transitions. [2018-10-26 22:33:27,976 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 250 transitions. Word has length 217 [2018-10-26 22:33:27,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:27,977 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 250 transitions. [2018-10-26 22:33:27,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-26 22:33:27,977 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 250 transitions. [2018-10-26 22:33:27,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-26 22:33:27,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:27,979 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 50, 23, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:27,979 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:27,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:27,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1801257268, now seen corresponding path program 51 times [2018-10-26 22:33:27,979 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:27,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:27,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:27,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:27,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 3696 proven. 950 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-10-26 22:33:28,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:28,753 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 [2018-10-26 22:33:28,760 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:33:28,820 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-26 22:33:28,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:28,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 3550 proven. 805 refuted. 0 times theorem prover too weak. 3675 trivial. 0 not checked. [2018-10-26 22:33:28,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:28,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 28 [2018-10-26 22:33:28,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-26 22:33:28,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-26 22:33:28,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-26 22:33:28,897 INFO L87 Difference]: Start difference. First operand 227 states and 250 transitions. Second operand 28 states. [2018-10-26 22:33:30,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:30,088 INFO L93 Difference]: Finished difference Result 241 states and 270 transitions. [2018-10-26 22:33:30,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-26 22:33:30,088 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 226 [2018-10-26 22:33:30,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:30,091 INFO L225 Difference]: With dead ends: 241 [2018-10-26 22:33:30,091 INFO L226 Difference]: Without dead ends: 237 [2018-10-26 22:33:30,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-26 22:33:30,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-10-26 22:33:30,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2018-10-26 22:33:30,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-10-26 22:33:30,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 262 transitions. [2018-10-26 22:33:30,097 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 262 transitions. Word has length 226 [2018-10-26 22:33:30,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:30,097 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 262 transitions. [2018-10-26 22:33:30,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-26 22:33:30,098 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 262 transitions. [2018-10-26 22:33:30,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-26 22:33:30,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:30,099 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 50, 26, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:30,099 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:30,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:30,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1134614545, now seen corresponding path program 52 times [2018-10-26 22:33:30,100 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:30,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:30,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:30,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:30,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 4128 proven. 1190 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-10-26 22:33:30,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:30,626 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 [2018-10-26 22:33:30,634 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:33:30,700 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:33:30,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:30,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:32,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:32,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 79] total 81 [2018-10-26 22:33:32,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-26 22:33:32,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-26 22:33:32,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-26 22:33:32,096 INFO L87 Difference]: Start difference. First operand 236 states and 262 transitions. Second operand 81 states. [2018-10-26 22:33:32,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:32,601 INFO L93 Difference]: Finished difference Result 250 states and 282 transitions. [2018-10-26 22:33:32,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-26 22:33:32,602 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 235 [2018-10-26 22:33:32,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:32,603 INFO L225 Difference]: With dead ends: 250 [2018-10-26 22:33:32,603 INFO L226 Difference]: Without dead ends: 246 [2018-10-26 22:33:32,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-26 22:33:32,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-26 22:33:32,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2018-10-26 22:33:32,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-10-26 22:33:32,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 274 transitions. [2018-10-26 22:33:32,607 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 274 transitions. Word has length 235 [2018-10-26 22:33:32,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:32,608 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 274 transitions. [2018-10-26 22:33:32,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-26 22:33:32,608 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 274 transitions. [2018-10-26 22:33:32,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-10-26 22:33:32,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:32,609 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 50, 29, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:32,609 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:32,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:32,609 INFO L82 PathProgramCache]: Analyzing trace with hash 972201068, now seen corresponding path program 53 times [2018-10-26 22:33:32,609 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:32,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:32,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:32,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:32,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 4560 proven. 1457 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2018-10-26 22:33:33,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:33,305 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 [2018-10-26 22:33:33,313 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:33:33,474 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 80 check-sat command(s) [2018-10-26 22:33:33,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:33,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 4470 proven. 3626 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2018-10-26 22:33:34,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:34,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 52] total 52 [2018-10-26 22:33:34,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-26 22:33:34,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-26 22:33:34,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-26 22:33:34,292 INFO L87 Difference]: Start difference. First operand 245 states and 274 transitions. Second operand 52 states. [2018-10-26 22:33:34,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:34,620 INFO L93 Difference]: Finished difference Result 312 states and 382 transitions. [2018-10-26 22:33:34,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-26 22:33:34,620 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 244 [2018-10-26 22:33:34,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:34,622 INFO L225 Difference]: With dead ends: 312 [2018-10-26 22:33:34,622 INFO L226 Difference]: Without dead ends: 308 [2018-10-26 22:33:34,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-26 22:33:34,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-10-26 22:33:34,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2018-10-26 22:33:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2018-10-26 22:33:34,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 358 transitions. [2018-10-26 22:33:34,630 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 358 transitions. Word has length 244 [2018-10-26 22:33:34,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:34,631 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 358 transitions. [2018-10-26 22:33:34,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-26 22:33:34,631 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 358 transitions. [2018-10-26 22:33:34,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-10-26 22:33:34,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:34,633 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 50, 50, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:34,633 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:34,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:34,633 INFO L82 PathProgramCache]: Analyzing trace with hash -378887791, now seen corresponding path program 54 times [2018-10-26 22:33:34,633 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:34,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:34,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:34,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:34,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 11225 refuted. 0 times theorem prover too weak. 3825 trivial. 0 not checked. [2018-10-26 22:33:37,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:37,222 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 [2018-10-26 22:33:37,230 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:33:37,529 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 101 check-sat command(s) [2018-10-26 22:33:37,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:37,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 11225 refuted. 0 times theorem prover too weak. 3825 trivial. 0 not checked. [2018-10-26 22:33:37,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:37,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-26 22:33:37,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-26 22:33:37,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-26 22:33:37,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-26 22:33:37,870 INFO L87 Difference]: Start difference. First operand 308 states and 358 transitions. Second operand 54 states. [2018-10-26 22:33:40,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:40,396 INFO L93 Difference]: Finished difference Result 4289 states and 5664 transitions. [2018-10-26 22:33:40,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-26 22:33:40,397 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 307 [2018-10-26 22:33:40,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:40,415 INFO L225 Difference]: With dead ends: 4289 [2018-10-26 22:33:40,415 INFO L226 Difference]: Without dead ends: 4285 [2018-10-26 22:33:40,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 306 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2018-10-26 22:33:40,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2018-10-26 22:33:40,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 311. [2018-10-26 22:33:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-10-26 22:33:40,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 362 transitions. [2018-10-26 22:33:40,517 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 362 transitions. Word has length 307 [2018-10-26 22:33:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:40,518 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 362 transitions. [2018-10-26 22:33:40,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-26 22:33:40,518 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 362 transitions. [2018-10-26 22:33:40,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-10-26 22:33:40,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:40,520 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 51, 50, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:40,520 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:40,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:40,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1341702412, now seen corresponding path program 55 times [2018-10-26 22:33:40,521 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:40,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:40,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:40,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:40,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 15352 backedges. 11527 proven. 0 refuted. 0 times theorem prover too weak. 3825 trivial. 0 not checked. [2018-10-26 22:33:41,850 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:33:41,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2018-10-26 22:33:41,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-26 22:33:41,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-26 22:33:41,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-26 22:33:41,851 INFO L87 Difference]: Start difference. First operand 311 states and 362 transitions. Second operand 52 states. [2018-10-26 22:33:42,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:42,348 INFO L93 Difference]: Finished difference Result 460 states and 560 transitions. [2018-10-26 22:33:42,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-26 22:33:42,358 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 310 [2018-10-26 22:33:42,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:42,359 INFO L225 Difference]: With dead ends: 460 [2018-10-26 22:33:42,359 INFO L226 Difference]: Without dead ends: 0 [2018-10-26 22:33:42,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-26 22:33:42,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-26 22:33:42,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-26 22:33:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-26 22:33:42,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-26 22:33:42,361 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 310 [2018-10-26 22:33:42,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:42,361 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-26 22:33:42,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-26 22:33:42,361 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-26 22:33:42,361 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-26 22:33:42,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-26 22:33:43,254 WARN L179 SmtUtils]: Spent 870.00 ms on a formula simplification. DAG size of input: 1832 DAG size of output: 407 [2018-10-26 22:33:47,317 WARN L179 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 407 DAG size of output: 357 [2018-10-26 22:33:47,323 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-26 22:33:47,323 INFO L425 ceAbstractionStarter]: For program point L13-1(lines 13 20) no Hoare annotation was computed. [2018-10-26 22:33:47,324 INFO L425 ceAbstractionStarter]: For program point L13-3(lines 13 20) no Hoare annotation was computed. [2018-10-26 22:33:47,324 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-26 22:33:47,324 INFO L425 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2018-10-26 22:33:47,324 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-10-26 22:33:47,324 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-26 22:33:47,324 INFO L428 ceAbstractionStarter]: At program point L22(lines 10 23) the Hoare annotation is: true [2018-10-26 22:33:47,324 INFO L425 ceAbstractionStarter]: For program point L14(lines 14 19) no Hoare annotation was computed. [2018-10-26 22:33:47,326 INFO L421 ceAbstractionStarter]: At program point L14-2(lines 13 20) the Hoare annotation is: (or (and (and (<= ULTIMATE.start_main_~y~0 72) (<= 72 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 72)) (<= 72 ULTIMATE.start_main_~x~0)) (and (<= 86 ULTIMATE.start_main_~x~0) (and (<= 86 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 86) (<= ULTIMATE.start_main_~y~0 86))) (and (and (<= 95 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 95) (<= ULTIMATE.start_main_~x~0 95)) (<= 95 ULTIMATE.start_main_~x~0)) (and (and (<= 76 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 76) (<= ULTIMATE.start_main_~y~0 76)) (<= 76 ULTIMATE.start_main_~x~0)) (and (<= 82 ULTIMATE.start_main_~x~0) (and (<= 82 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 82) (<= ULTIMATE.start_main_~x~0 82))) (and (and (<= ULTIMATE.start_main_~y~0 70) (<= ULTIMATE.start_main_~x~0 70) (<= 70 ULTIMATE.start_main_~y~0)) (<= 70 ULTIMATE.start_main_~x~0)) (and (<= 52 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 52) (<= 52 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 52))) (and (<= 87 ULTIMATE.start_main_~x~0) (and (<= 87 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 87) (<= ULTIMATE.start_main_~y~0 87))) (and (<= 81 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 81) (<= ULTIMATE.start_main_~x~0 81) (<= 81 ULTIMATE.start_main_~y~0))) (and (and (<= ULTIMATE.start_main_~y~0 98) (<= 98 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 98)) (<= 98 ULTIMATE.start_main_~x~0)) (and (<= 84 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 84) (<= 84 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 84))) (and (<= 85 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 85) (<= 85 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 85))) (and (and (<= 68 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 68) (<= ULTIMATE.start_main_~y~0 68)) (<= 68 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 91) (<= 91 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 91)) (<= 91 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 58) (<= ULTIMATE.start_main_~x~0 58) (<= 58 ULTIMATE.start_main_~y~0)) (<= 58 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 65) (<= ULTIMATE.start_main_~x~0 65) (<= 65 ULTIMATE.start_main_~y~0)) (<= 65 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 79) (<= 79 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 79)) (<= 79 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 88) (<= ULTIMATE.start_main_~x~0 88) (<= 88 ULTIMATE.start_main_~y~0)) (<= 88 ULTIMATE.start_main_~x~0)) (and (<= 99 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 99) (<= 99 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 99))) (and (<= 55 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 55) (<= 55 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 55))) (and (and (<= 93 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 93) (<= ULTIMATE.start_main_~y~0 93)) (<= 93 ULTIMATE.start_main_~x~0)) (and (<= 71 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 71) (<= ULTIMATE.start_main_~x~0 71) (<= 71 ULTIMATE.start_main_~y~0))) (and (<= 89 ULTIMATE.start_main_~x~0) (and (<= 89 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 89) (<= ULTIMATE.start_main_~y~0 89))) (and (<= 59 ULTIMATE.start_main_~x~0) (and (<= 59 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 59) (<= ULTIMATE.start_main_~x~0 59))) (and (and (<= 100 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 100)) (<= 100 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 50) (<= ULTIMATE.start_main_~y~0 50) (<= 50 ULTIMATE.start_main_~y~0)) (and (and (<= ULTIMATE.start_main_~x~0 78) (<= 78 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 78)) (<= 78 ULTIMATE.start_main_~x~0)) (and (<= 66 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 66) (<= ULTIMATE.start_main_~x~0 66) (<= 66 ULTIMATE.start_main_~y~0))) (and (<= 57 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~x~0 57) (<= ULTIMATE.start_main_~y~0 57) (<= 57 ULTIMATE.start_main_~y~0))) (and (and (<= ULTIMATE.start_main_~x~0 94) (<= ULTIMATE.start_main_~y~0 94) (<= 94 ULTIMATE.start_main_~y~0)) (<= 94 ULTIMATE.start_main_~x~0)) (and (<= 63 ULTIMATE.start_main_~x~0) (and (<= 63 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 63) (<= ULTIMATE.start_main_~x~0 63))) (and (and (<= 97 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 97) (<= ULTIMATE.start_main_~y~0 97)) (<= 97 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~x~0 74) (<= 74 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 74)) (<= 74 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~x~0 51) (<= ULTIMATE.start_main_~y~0 51) (<= 51 ULTIMATE.start_main_~y~0)) (<= 51 ULTIMATE.start_main_~x~0)) (and (and (<= 64 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 64) (<= ULTIMATE.start_main_~y~0 64)) (<= 64 ULTIMATE.start_main_~x~0)) (and (<= 73 ULTIMATE.start_main_~x~0) (and (<= 73 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 73) (<= ULTIMATE.start_main_~x~0 73))) (and (<= 67 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~x~0 67) (<= 67 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 67))) (and (<= 54 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 54) (<= 54 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 54))) (and (and (<= ULTIMATE.start_main_~y~0 69) (<= 69 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 69)) (<= 69 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~x~0 62) (<= ULTIMATE.start_main_~y~0 62) (<= 62 ULTIMATE.start_main_~y~0)) (<= 62 ULTIMATE.start_main_~x~0)) (and (and (<= 61 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 61) (<= ULTIMATE.start_main_~y~0 61)) (<= 61 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~x~0 53) (<= ULTIMATE.start_main_~y~0 53) (<= 53 ULTIMATE.start_main_~y~0)) (<= 53 ULTIMATE.start_main_~x~0)) (and (<= 60 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~x~0 60) (<= ULTIMATE.start_main_~y~0 60) (<= 60 ULTIMATE.start_main_~y~0))) (and (and (<= ULTIMATE.start_main_~y~0 75) (<= ULTIMATE.start_main_~x~0 75) (<= 75 ULTIMATE.start_main_~y~0)) (<= 75 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~x~0 90) (<= ULTIMATE.start_main_~y~0 90) (<= 90 ULTIMATE.start_main_~y~0)) (<= 90 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 96) (<= 96 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 96)) (<= 96 ULTIMATE.start_main_~x~0)) (and (and (<= 80 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 80) (<= ULTIMATE.start_main_~y~0 80)) (<= 80 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~x~0 83) (<= ULTIMATE.start_main_~y~0 83) (<= 83 ULTIMATE.start_main_~y~0)) (<= 83 ULTIMATE.start_main_~x~0)) (and (and (<= ULTIMATE.start_main_~y~0 56) (<= ULTIMATE.start_main_~x~0 56) (<= 56 ULTIMATE.start_main_~y~0)) (<= 56 ULTIMATE.start_main_~x~0)) (and (<= 77 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~x~0 77) (<= 77 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 77))) (and (<= 92 ULTIMATE.start_main_~x~0) (and (<= ULTIMATE.start_main_~y~0 92) (<= ULTIMATE.start_main_~x~0 92) (<= 92 ULTIMATE.start_main_~y~0)))) [2018-10-26 22:33:47,326 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-26 22:33:47,326 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-26 22:33:47,326 INFO L428 ceAbstractionStarter]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2018-10-26 22:33:47,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 10:33:47 BoogieIcfgContainer [2018-10-26 22:33:47,374 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 22:33:47,375 INFO L168 Benchmark]: Toolchain (without parser) took 83512.17 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.2 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -308.6 MB). Peak memory consumption was 897.3 MB. Max. memory is 7.1 GB. [2018-10-26 22:33:47,376 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 22:33:47,376 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.78 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: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2018-10-26 22:33:47,377 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.85 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. [2018-10-26 22:33:47,377 INFO L168 Benchmark]: Boogie Preprocessor took 23.55 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 22:33:47,378 INFO L168 Benchmark]: RCFGBuilder took 319.20 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 757.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -810.3 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-10-26 22:33:47,378 INFO L168 Benchmark]: TraceAbstraction took 82838.85 ms. Allocated memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: 448.8 MB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 488.5 MB). Peak memory consumption was 937.3 MB. Max. memory is 7.1 GB. [2018-10-26 22:33:47,383 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 291.78 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: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 31.85 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 23.55 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 319.20 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 757.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -810.3 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 82838.85 ms. Allocated memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: 448.8 MB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 488.5 MB). Peak memory consumption was 937.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((y <= 72 && 72 <= y) && x <= 72) && 72 <= x) || (86 <= x && (86 <= y && x <= 86) && y <= 86)) || (((95 <= y && y <= 95) && x <= 95) && 95 <= x)) || (((76 <= y && x <= 76) && y <= 76) && 76 <= x)) || (82 <= x && (82 <= y && y <= 82) && x <= 82)) || (((y <= 70 && x <= 70) && 70 <= y) && 70 <= x)) || (52 <= x && (y <= 52 && 52 <= y) && x <= 52)) || (87 <= x && (87 <= y && x <= 87) && y <= 87)) || (81 <= x && (y <= 81 && x <= 81) && 81 <= y)) || (((y <= 98 && 98 <= y) && x <= 98) && 98 <= x)) || (84 <= x && (y <= 84 && 84 <= y) && x <= 84)) || (85 <= x && (y <= 85 && 85 <= y) && x <= 85)) || (((68 <= y && x <= 68) && y <= 68) && 68 <= x)) || (((y <= 91 && 91 <= y) && x <= 91) && 91 <= x)) || (((y <= 58 && x <= 58) && 58 <= y) && 58 <= x)) || (((y <= 65 && x <= 65) && 65 <= y) && 65 <= x)) || (((y <= 79 && 79 <= y) && x <= 79) && 79 <= x)) || (((y <= 88 && x <= 88) && 88 <= y) && 88 <= x)) || (99 <= x && (y <= 99 && 99 <= y) && x <= 99)) || (55 <= x && (y <= 55 && 55 <= y) && x <= 55)) || (((93 <= y && x <= 93) && y <= 93) && 93 <= x)) || (71 <= x && (y <= 71 && x <= 71) && 71 <= y)) || (89 <= x && (89 <= y && x <= 89) && y <= 89)) || (59 <= x && (59 <= y && y <= 59) && x <= 59)) || ((100 <= y && y <= 100) && 100 <= x)) || ((x <= 50 && y <= 50) && 50 <= y)) || (((x <= 78 && 78 <= y) && y <= 78) && 78 <= x)) || (66 <= x && (y <= 66 && x <= 66) && 66 <= y)) || (57 <= x && (x <= 57 && y <= 57) && 57 <= y)) || (((x <= 94 && y <= 94) && 94 <= y) && 94 <= x)) || (63 <= x && (63 <= y && y <= 63) && x <= 63)) || (((97 <= y && x <= 97) && y <= 97) && 97 <= x)) || (((x <= 74 && 74 <= y) && y <= 74) && 74 <= x)) || (((x <= 51 && y <= 51) && 51 <= y) && 51 <= x)) || (((64 <= y && x <= 64) && y <= 64) && 64 <= x)) || (73 <= x && (73 <= y && y <= 73) && x <= 73)) || (67 <= x && (x <= 67 && 67 <= y) && y <= 67)) || (54 <= x && (y <= 54 && 54 <= y) && x <= 54)) || (((y <= 69 && 69 <= y) && x <= 69) && 69 <= x)) || (((x <= 62 && y <= 62) && 62 <= y) && 62 <= x)) || (((61 <= y && x <= 61) && y <= 61) && 61 <= x)) || (((x <= 53 && y <= 53) && 53 <= y) && 53 <= x)) || (60 <= x && (x <= 60 && y <= 60) && 60 <= y)) || (((y <= 75 && x <= 75) && 75 <= y) && 75 <= x)) || (((x <= 90 && y <= 90) && 90 <= y) && 90 <= x)) || (((y <= 96 && 96 <= y) && x <= 96) && 96 <= x)) || (((80 <= y && x <= 80) && y <= 80) && 80 <= x)) || (((x <= 83 && y <= 83) && 83 <= y) && 83 <= x)) || (((y <= 56 && x <= 56) && 56 <= y) && 56 <= x)) || (77 <= x && (x <= 77 && 77 <= y) && y <= 77)) || (92 <= x && (y <= 92 && x <= 92) && 92 <= y) - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. SAFE Result, 82.7s OverallTime, 58 OverallIterations, 102 TraceHistogramMax, 17.8s AutomataDifference, 0.0s DeadEndRemovalTime, 4.9s HoareAnnotationTime, HoareTripleCheckerStatistics: 646 SDtfs, 948 SDslu, 13072 SDs, 0 SdLazy, 8243 SolverSat, 1931 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8248 GetRequests, 6417 SyntacticMatches, 2 SemanticMatches, 1829 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6900 ImplicationChecksByTransitivity, 50.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=311occurred in iteration=57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 58 MinimizatonAttempts, 3995 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 106 NumberOfFragments, 710 HoareAnnotationTreeSize, 3 FomulaSimplifications, 13400 FormulaSimplificationTreeSizeReduction, 0.8s HoareSimplificationTime, 3 FomulaSimplificationsInter, 200 FormulaSimplificationTreeSizeReductionInter, 4.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 53.2s InterpolantComputationTime, 13681 NumberOfCodeBlocks, 12883 NumberOfCodeBlocksAsserted, 965 NumberOfCheckSat, 13568 ConstructedInterpolants, 0 QuantifiedInterpolants, 5819482 SizeOfPredicates, 25 NumberOfNonLiveVariables, 11186 ConjunctsInSsa, 1456 ConjunctsInUnsatCore, 113 InterpolantComputations, 4 PerfectInterpolantSequences, 183380/343178 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...