java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/up.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:45:32,513 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:45:32,516 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:45:32,532 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:45:32,533 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:45:32,534 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:45:32,536 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:45:32,538 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:45:32,541 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:45:32,548 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:45:32,549 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 19:45:32,549 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 19:45:32,550 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 19:45:32,553 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 19:45:32,556 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 19:45:32,557 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 19:45:32,557 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 19:45:32,559 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 19:45:32,565 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 19:45:32,566 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 19:45:32,567 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 19:45:32,569 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 19:45:32,574 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-23 19:45:32,575 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-23 19:45:32,575 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-23 19:45:32,576 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-23 19:45:32,577 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-23 19:45:32,578 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-23 19:45:32,578 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-23 19:45:32,579 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-23 19:45:32,579 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-23 19:45:32,580 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-23 19:45:32,580 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-23 19:45:32,580 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-23 19:45:32,581 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-23 19:45:32,582 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-23 19:45:32,582 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:45:32,598 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:45:32,598 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:45:32,599 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:45:32,599 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:45:32,600 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:45:32,600 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:45:32,600 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:45:32,601 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:45:32,601 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:45:32,601 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:45:32,601 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:45:32,601 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:45:32,602 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:45:32,602 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:45:32,602 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:45:32,602 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:45:32,602 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:45:32,602 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:45:32,603 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:45:32,603 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:45:32,603 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:45:32,603 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:45:32,603 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:45:32,604 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:45:32,604 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:45:32,604 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:45:32,604 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:45:32,604 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:45:32,605 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:45:32,605 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:45:32,647 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:45:32,661 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:45:32,668 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:45:32,669 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:45:32,670 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:45:32,671 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/up.i_4.bpl [2018-09-23 19:45:32,672 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/up.i_4.bpl' [2018-09-23 19:45:32,715 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:45:32,718 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:45:32,719 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:45:32,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:45:32,719 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:45:32,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:32" (1/1) ... [2018-09-23 19:45:32,750 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:32" (1/1) ... [2018-09-23 19:45:32,756 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:45:32,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:45:32,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:45:32,757 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:45:32,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:32" (1/1) ... [2018-09-23 19:45:32,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:32" (1/1) ... [2018-09-23 19:45:32,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:32" (1/1) ... [2018-09-23 19:45:32,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:32" (1/1) ... [2018-09-23 19:45:32,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:32" (1/1) ... [2018-09-23 19:45:32,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:32" (1/1) ... [2018-09-23 19:45:32,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:32" (1/1) ... [2018-09-23 19:45:32,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:45:32,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:45:32,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:45:32,777 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:45:32,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:45:32,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 19:45:32,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 19:45:33,136 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 19:45:33,137 INFO L202 PluginConnector]: Adding new model up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:45:33 BoogieIcfgContainer [2018-09-23 19:45:33,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:45:33,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:45:33,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:45:33,142 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:45:33,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:32" (1/2) ... [2018-09-23 19:45:33,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e3ce911 and model type up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:45:33, skipping insertion in model container [2018-09-23 19:45:33,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:45:33" (2/2) ... [2018-09-23 19:45:33,145 INFO L112 eAbstractionObserver]: Analyzing ICFG up.i_4.bpl [2018-09-23 19:45:33,155 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:45:33,162 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:45:33,208 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:45:33,209 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:45:33,209 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:45:33,210 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:45:33,210 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:45:33,210 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:45:33,210 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:45:33,210 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:45:33,211 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:45:33,225 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-23 19:45:33,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 19:45:33,231 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:33,232 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-23 19:45:33,233 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:33,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:33,242 INFO L82 PathProgramCache]: Analyzing trace with hash 889539593, now seen corresponding path program 1 times [2018-09-23 19:45:33,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:33,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:33,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:33,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:33,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:33,457 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:45:33,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-23 19:45:33,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:45:33,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:45:33,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:45:33,488 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-09-23 19:45:33,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:33,628 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-09-23 19:45:33,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:45:33,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-23 19:45:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:33,642 INFO L225 Difference]: With dead ends: 16 [2018-09-23 19:45:33,642 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 19:45:33,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:45:33,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 19:45:33,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 19:45:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 19:45:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-23 19:45:33,682 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-09-23 19:45:33,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:33,682 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-23 19:45:33,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:45:33,682 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-23 19:45:33,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:45:33,683 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:33,683 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:45:33,683 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:33,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:33,684 INFO L82 PathProgramCache]: Analyzing trace with hash 198622019, now seen corresponding path program 1 times [2018-09-23 19:45:33,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:33,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:33,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:33,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:33,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:33,770 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:45:33,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-23 19:45:33,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:45:33,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:45:33,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:45:33,773 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-09-23 19:45:33,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:33,853 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-23 19:45:33,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:45:33,855 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-23 19:45:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:33,856 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:45:33,856 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 19:45:33,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:45:33,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 19:45:33,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-09-23 19:45:33,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 19:45:33,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-23 19:45:33,862 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-23 19:45:33,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:33,862 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-23 19:45:33,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:45:33,863 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-23 19:45:33,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:45:33,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:33,863 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:45:33,864 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:33,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:33,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1897132479, now seen corresponding path program 1 times [2018-09-23 19:45:33,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:33,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:33,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:33,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:33,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:33,993 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:33,993 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:34,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:34,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:34,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:34,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-09-23 19:45:34,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:45:34,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:45:34,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:45:34,397 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 8 states. [2018-09-23 19:45:34,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:34,555 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-09-23 19:45:34,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:45:34,556 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-23 19:45:34,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:34,557 INFO L225 Difference]: With dead ends: 20 [2018-09-23 19:45:34,557 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 19:45:34,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:45:34,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 19:45:34,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 19:45:34,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 19:45:34,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-23 19:45:34,562 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-09-23 19:45:34,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:34,563 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-23 19:45:34,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:45:34,563 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-23 19:45:34,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 19:45:34,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:34,564 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-09-23 19:45:34,564 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:34,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:34,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1765329927, now seen corresponding path program 2 times [2018-09-23 19:45:34,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:34,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:34,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:34,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:34,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:34,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:34,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:34,742 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:45:34,782 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:45:34,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:34,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:34,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:34,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-09-23 19:45:34,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:45:34,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:45:34,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:45:34,844 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-09-23 19:45:35,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:35,025 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-23 19:45:35,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:45:35,026 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-09-23 19:45:35,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:35,027 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:45:35,029 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 19:45:35,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:45:35,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 19:45:35,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-09-23 19:45:35,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 19:45:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-23 19:45:35,035 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-09-23 19:45:35,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:35,035 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-23 19:45:35,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:45:35,035 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-23 19:45:35,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:45:35,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:35,036 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-23 19:45:35,037 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:35,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:35,037 INFO L82 PathProgramCache]: Analyzing trace with hash 29955317, now seen corresponding path program 3 times [2018-09-23 19:45:35,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:35,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:35,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:35,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:35,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:35,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:35,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:35,190 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:45:35,203 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 19:45:35,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:35,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:35,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:35,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-23 19:45:35,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:45:35,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:45:35,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:45:35,597 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-09-23 19:45:35,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:35,719 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-09-23 19:45:35,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:45:35,720 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-09-23 19:45:35,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:35,721 INFO L225 Difference]: With dead ends: 26 [2018-09-23 19:45:35,721 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 19:45:35,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:45:35,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 19:45:35,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 19:45:35,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 19:45:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-23 19:45:35,726 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-09-23 19:45:35,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:35,727 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-23 19:45:35,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:45:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-23 19:45:35,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:45:35,727 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:35,728 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-09-23 19:45:35,728 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:35,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:35,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1153652177, now seen corresponding path program 4 times [2018-09-23 19:45:35,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:35,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:35,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:35,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:35,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:35,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:35,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:35,905 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:45:35,943 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:45:35,944 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:35,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:35,976 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:36,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:36,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-09-23 19:45:36,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:45:36,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:45:36,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:45:36,005 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-09-23 19:45:36,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:36,145 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-23 19:45:36,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:45:36,145 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-23 19:45:36,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:36,146 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:45:36,146 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:45:36,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:45:36,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:45:36,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-09-23 19:45:36,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:45:36,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-23 19:45:36,152 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-09-23 19:45:36,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:36,152 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-23 19:45:36,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:45:36,153 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-23 19:45:36,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:45:36,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:36,154 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-23 19:45:36,154 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:36,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:36,154 INFO L82 PathProgramCache]: Analyzing trace with hash -558246485, now seen corresponding path program 5 times [2018-09-23 19:45:36,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:36,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:36,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:36,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:36,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:36,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:36,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:36,441 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:45:36,470 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 19:45:36,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:36,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:36,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:36,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-09-23 19:45:36,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:45:36,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:45:36,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:45:36,663 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 14 states. [2018-09-23 19:45:36,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:36,848 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-09-23 19:45:36,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:45:36,848 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2018-09-23 19:45:36,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:36,849 INFO L225 Difference]: With dead ends: 32 [2018-09-23 19:45:36,849 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 19:45:36,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:45:36,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 19:45:36,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 19:45:36,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 19:45:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-23 19:45:36,854 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-09-23 19:45:36,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:36,855 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-23 19:45:36,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:45:36,855 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-23 19:45:36,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:45:36,856 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:36,856 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-09-23 19:45:36,856 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:36,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:36,856 INFO L82 PathProgramCache]: Analyzing trace with hash -578011675, now seen corresponding path program 6 times [2018-09-23 19:45:36,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:36,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:36,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:36,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:36,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:36,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:36,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:36,998 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:45:37,015 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-23 19:45:37,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:37,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:37,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:37,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-09-23 19:45:37,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:45:37,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:45:37,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:45:37,067 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-09-23 19:45:37,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:37,229 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-23 19:45:37,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:45:37,230 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-09-23 19:45:37,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:37,230 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:45:37,230 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:45:37,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:45:37,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:45:37,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-09-23 19:45:37,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 19:45:37,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-23 19:45:37,238 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-09-23 19:45:37,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:37,238 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-23 19:45:37,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:45:37,238 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-23 19:45:37,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:45:37,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:37,239 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-09-23 19:45:37,239 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:37,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:37,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1418505247, now seen corresponding path program 7 times [2018-09-23 19:45:37,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:37,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:37,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:37,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:37,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:37,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:37,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:37,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:37,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:37,584 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:37,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-09-23 19:45:37,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:45:37,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:45:37,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:45:37,585 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 17 states. [2018-09-23 19:45:38,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:38,043 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-09-23 19:45:38,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:45:38,043 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2018-09-23 19:45:38,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:38,044 INFO L225 Difference]: With dead ends: 38 [2018-09-23 19:45:38,044 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 19:45:38,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:45:38,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 19:45:38,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 19:45:38,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 19:45:38,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-23 19:45:38,050 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-09-23 19:45:38,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:38,051 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-23 19:45:38,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:45:38,051 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-23 19:45:38,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:45:38,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:38,052 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-09-23 19:45:38,052 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:38,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:38,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1375531237, now seen corresponding path program 8 times [2018-09-23 19:45:38,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:38,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:38,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:38,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:38,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:38,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:38,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:38,203 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:45:38,220 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:45:38,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:38,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:38,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:38,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-09-23 19:45:38,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:45:38,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:45:38,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:45:38,322 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-09-23 19:45:38,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:38,498 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-23 19:45:38,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:45:38,500 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-09-23 19:45:38,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:38,501 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:45:38,501 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:45:38,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:45:38,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:45:38,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-09-23 19:45:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 19:45:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-23 19:45:38,508 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-09-23 19:45:38,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:38,508 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-23 19:45:38,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:45:38,508 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-23 19:45:38,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:45:38,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:38,509 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-23 19:45:38,510 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:38,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:38,510 INFO L82 PathProgramCache]: Analyzing trace with hash 964341655, now seen corresponding path program 9 times [2018-09-23 19:45:38,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:38,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:38,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:38,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:38,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:38,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:38,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:38,709 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:45:38,794 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 19:45:38,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:38,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:39,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:39,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-09-23 19:45:39,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:45:39,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:45:39,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:45:39,129 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 20 states. [2018-09-23 19:45:39,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:39,588 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-23 19:45:39,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:45:39,589 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2018-09-23 19:45:39,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:39,590 INFO L225 Difference]: With dead ends: 44 [2018-09-23 19:45:39,590 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:45:39,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:45:39,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:45:39,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 19:45:39,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 19:45:39,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-23 19:45:39,597 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-09-23 19:45:39,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:39,597 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-23 19:45:39,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:45:39,597 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-23 19:45:39,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 19:45:39,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:39,598 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-09-23 19:45:39,598 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:39,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:39,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1427751471, now seen corresponding path program 10 times [2018-09-23 19:45:39,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:39,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:39,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:39,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:39,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:39,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:39,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:39,805 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:45:39,836 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:45:39,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:39,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:39,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:39,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-09-23 19:45:39,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:45:39,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:45:39,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:45:39,884 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-09-23 19:45:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:40,406 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-23 19:45:40,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:45:40,407 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-09-23 19:45:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:40,408 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:45:40,408 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:45:40,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:45:40,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:45:40,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-09-23 19:45:40,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 19:45:40,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-23 19:45:40,415 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-09-23 19:45:40,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:40,415 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-23 19:45:40,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:45:40,415 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-23 19:45:40,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 19:45:40,416 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:40,416 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-09-23 19:45:40,417 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:40,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:40,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1974662963, now seen corresponding path program 11 times [2018-09-23 19:45:40,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:40,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:40,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:40,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:40,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:40,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:40,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:40,809 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:45:40,871 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:45:40,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:40,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:41,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:41,118 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2018-09-23 19:45:41,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:45:41,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:45:41,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:45:41,119 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 23 states. [2018-09-23 19:45:41,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:41,361 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-09-23 19:45:41,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:45:41,362 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2018-09-23 19:45:41,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:41,363 INFO L225 Difference]: With dead ends: 50 [2018-09-23 19:45:41,363 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:45:41,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:45:41,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:45:41,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 19:45:41,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 19:45:41,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-23 19:45:41,372 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-09-23 19:45:41,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:41,373 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-23 19:45:41,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:45:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-23 19:45:41,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 19:45:41,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:41,374 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-09-23 19:45:41,374 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:41,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:41,374 INFO L82 PathProgramCache]: Analyzing trace with hash 577956359, now seen corresponding path program 12 times [2018-09-23 19:45:41,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:41,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:41,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:41,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:41,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:41,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:41,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:41,634 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:45:41,662 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:45:41,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:41,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:41,753 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:41,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-09-23 19:45:41,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:45:41,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:45:41,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:45:41,754 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-09-23 19:45:42,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:42,054 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-23 19:45:42,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:45:42,054 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-09-23 19:45:42,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:42,056 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:45:42,056 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:45:42,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:45:42,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:45:42,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-09-23 19:45:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 19:45:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-23 19:45:42,064 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-09-23 19:45:42,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:42,064 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-23 19:45:42,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:45:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-23 19:45:42,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 19:45:42,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:42,066 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-23 19:45:42,066 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:42,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:42,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1365213059, now seen corresponding path program 13 times [2018-09-23 19:45:42,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:42,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:42,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:42,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:42,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:42,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:42,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:42,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:42,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:42,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:42,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-09-23 19:45:42,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:45:42,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:45:42,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:45:42,760 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 26 states. [2018-09-23 19:45:43,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:43,180 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-09-23 19:45:43,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:45:43,181 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2018-09-23 19:45:43,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:43,182 INFO L225 Difference]: With dead ends: 56 [2018-09-23 19:45:43,182 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:45:43,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:45:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:45:43,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 19:45:43,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 19:45:43,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-23 19:45:43,189 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-09-23 19:45:43,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:43,189 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-23 19:45:43,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:45:43,189 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-23 19:45:43,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 19:45:43,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:43,190 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-09-23 19:45:43,190 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:43,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:43,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1260506179, now seen corresponding path program 14 times [2018-09-23 19:45:43,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:43,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:43,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:43,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:43,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:43,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:43,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:43,382 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:45:43,401 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:45:43,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:43,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:43,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:43,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-09-23 19:45:43,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:45:43,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:45:43,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:45:43,498 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-09-23 19:45:43,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:43,652 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-23 19:45:43,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:45:43,652 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-09-23 19:45:43,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:43,653 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:45:43,653 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:45:43,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:45:43,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:45:43,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-09-23 19:45:43,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 19:45:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-23 19:45:43,663 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-09-23 19:45:43,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:43,664 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-23 19:45:43,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:45:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-23 19:45:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:45:43,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:43,665 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-09-23 19:45:43,665 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:43,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:43,665 INFO L82 PathProgramCache]: Analyzing trace with hash -165727303, now seen corresponding path program 15 times [2018-09-23 19:45:43,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:43,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:43,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:43,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:43,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:43,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:43,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:43,918 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:45:43,948 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:45:43,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:43,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:44,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:44,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-09-23 19:45:44,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:45:44,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:45:44,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:45:44,152 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 29 states. [2018-09-23 19:45:44,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:44,545 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-09-23 19:45:44,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:45:44,545 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 38 [2018-09-23 19:45:44,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:44,546 INFO L225 Difference]: With dead ends: 62 [2018-09-23 19:45:44,546 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:45:44,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:45:44,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:45:44,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 19:45:44,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 19:45:44,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-23 19:45:44,554 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-09-23 19:45:44,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:44,555 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-23 19:45:44,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:45:44,555 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-23 19:45:44,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 19:45:44,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:44,556 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-09-23 19:45:44,556 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:44,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:44,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1448426227, now seen corresponding path program 16 times [2018-09-23 19:45:44,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:44,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:44,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:44,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:44,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:44,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:44,725 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:44,734 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:45:44,760 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:45:44,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:44,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:44,822 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:44,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-09-23 19:45:44,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:45:44,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:45:44,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:45:44,823 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-09-23 19:45:45,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:45,255 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-23 19:45:45,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:45:45,256 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-09-23 19:45:45,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:45,257 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:45:45,257 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:45:45,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:45:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:45:45,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-09-23 19:45:45,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 19:45:45,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-23 19:45:45,266 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-09-23 19:45:45,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:45,266 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-23 19:45:45,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:45:45,266 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-23 19:45:45,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 19:45:45,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:45,267 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-23 19:45:45,268 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:45,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:45,268 INFO L82 PathProgramCache]: Analyzing trace with hash 368133487, now seen corresponding path program 17 times [2018-09-23 19:45:45,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:45,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:45,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:45,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:45,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:45,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:45,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:45,866 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:45:45,894 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 19:45:45,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:45,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:46,109 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:46,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:46,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2018-09-23 19:45:46,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:45:46,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:45:46,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:45:46,131 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 32 states. [2018-09-23 19:45:46,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:46,469 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-23 19:45:46,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:45:46,469 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 42 [2018-09-23 19:45:46,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:46,470 INFO L225 Difference]: With dead ends: 68 [2018-09-23 19:45:46,470 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:45:46,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=436, Invalid=1286, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:45:46,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:45:46,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 19:45:46,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 19:45:46,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-23 19:45:46,479 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-09-23 19:45:46,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:46,479 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-23 19:45:46,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:45:46,480 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-23 19:45:46,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 19:45:46,480 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:46,480 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-09-23 19:45:46,480 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:46,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:46,481 INFO L82 PathProgramCache]: Analyzing trace with hash -788717655, now seen corresponding path program 18 times [2018-09-23 19:45:46,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:46,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:46,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:46,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:46,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:47,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:47,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:47,473 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:45:47,517 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-09-23 19:45:47,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:47,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:47,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:47,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-09-23 19:45:47,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:45:47,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:45:47,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:45:47,582 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-09-23 19:45:47,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:47,830 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-23 19:45:47,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:45:47,831 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-23 19:45:47,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:47,831 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:45:47,831 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:45:47,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:45:47,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:45:47,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-09-23 19:45:47,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 19:45:47,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-23 19:45:47,839 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-09-23 19:45:47,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:47,839 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-23 19:45:47,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:45:47,840 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-23 19:45:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 19:45:47,840 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:47,840 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-09-23 19:45:47,840 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:47,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:47,841 INFO L82 PathProgramCache]: Analyzing trace with hash -2043489115, now seen corresponding path program 19 times [2018-09-23 19:45:47,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:47,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:47,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:47,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:47,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:48,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:48,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:48,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:48,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:48,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:48,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2018-09-23 19:45:48,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:45:48,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:45:48,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=892, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:45:48,609 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 35 states. [2018-09-23 19:45:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:49,011 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-09-23 19:45:49,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:45:49,011 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 46 [2018-09-23 19:45:49,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:49,011 INFO L225 Difference]: With dead ends: 74 [2018-09-23 19:45:49,011 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:45:49,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=518, Invalid=1552, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:45:49,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:45:49,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 19:45:49,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 19:45:49,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-23 19:45:49,019 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-09-23 19:45:49,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:49,019 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-23 19:45:49,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:45:49,020 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-23 19:45:49,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 19:45:49,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:49,020 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-09-23 19:45:49,020 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:49,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:49,021 INFO L82 PathProgramCache]: Analyzing trace with hash -957152801, now seen corresponding path program 20 times [2018-09-23 19:45:49,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:49,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:49,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:49,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:49,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:49,745 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:49,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:49,753 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:45:49,782 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:45:49,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:49,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:49,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:49,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-09-23 19:45:49,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:45:49,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:45:49,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:45:49,864 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-09-23 19:45:50,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:50,195 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-23 19:45:50,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:45:50,198 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-09-23 19:45:50,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:50,199 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:45:50,199 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:45:50,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=303, Invalid=509, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:45:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:45:50,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-09-23 19:45:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 19:45:50,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-23 19:45:50,212 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-09-23 19:45:50,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:50,212 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-23 19:45:50,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:45:50,212 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-23 19:45:50,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 19:45:50,213 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:50,213 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-23 19:45:50,213 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:50,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:50,213 INFO L82 PathProgramCache]: Analyzing trace with hash -700907173, now seen corresponding path program 21 times [2018-09-23 19:45:50,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:50,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:50,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:50,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:50,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:51,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:51,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:51,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:45:51,706 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 19:45:51,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:51,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:52,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:52,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-09-23 19:45:52,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:45:52,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:45:52,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:45:52,049 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 38 states. [2018-09-23 19:45:52,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:52,816 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-09-23 19:45:52,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:45:52,816 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 50 [2018-09-23 19:45:52,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:52,817 INFO L225 Difference]: With dead ends: 80 [2018-09-23 19:45:52,817 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:45:52,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=607, Invalid=1843, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:45:52,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:45:52,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 19:45:52,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 19:45:52,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-23 19:45:52,824 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-09-23 19:45:52,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:52,825 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-23 19:45:52,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:45:52,825 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-23 19:45:52,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 19:45:52,825 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:52,825 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-09-23 19:45:52,826 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:52,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:52,826 INFO L82 PathProgramCache]: Analyzing trace with hash 877396373, now seen corresponding path program 22 times [2018-09-23 19:45:52,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:52,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:52,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:52,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:52,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:53,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:53,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:53,018 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:45:53,052 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:45:53,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:53,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:53,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:53,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-09-23 19:45:53,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:45:53,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:45:53,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:45:53,224 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-09-23 19:45:53,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:53,542 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-23 19:45:53,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:45:53,543 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-09-23 19:45:53,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:53,543 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:45:53,543 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:45:53,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:45:53,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:45:53,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-09-23 19:45:53,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 19:45:53,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-23 19:45:53,551 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-09-23 19:45:53,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:53,552 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-23 19:45:53,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:45:53,552 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-23 19:45:53,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 19:45:53,552 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:53,552 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-09-23 19:45:53,552 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:53,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:53,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1364257681, now seen corresponding path program 23 times [2018-09-23 19:45:53,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:53,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:53,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:53,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:53,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:54,055 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:54,055 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:54,071 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:45:54,264 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 19:45:54,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:54,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:54,752 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:54,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-09-23 19:45:54,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:45:54,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:45:54,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:45:54,753 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 41 states. [2018-09-23 19:45:55,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:55,147 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-09-23 19:45:55,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:45:55,148 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 54 [2018-09-23 19:45:55,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:55,148 INFO L225 Difference]: With dead ends: 86 [2018-09-23 19:45:55,149 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:45:55,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=703, Invalid=2159, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:45:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:45:55,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 19:45:55,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 19:45:55,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-23 19:45:55,156 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-09-23 19:45:55,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:55,157 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-23 19:45:55,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:45:55,157 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-23 19:45:55,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 19:45:55,157 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:55,157 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-09-23 19:45:55,157 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:55,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:55,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1897217739, now seen corresponding path program 24 times [2018-09-23 19:45:55,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:55,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:55,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:55,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:55,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:55,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:55,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:55,392 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:45:55,429 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-23 19:45:55,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:55,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:55,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:55,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-09-23 19:45:55,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:45:55,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:45:55,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:45:55,477 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-09-23 19:45:55,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:55,887 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-23 19:45:55,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:45:55,887 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-09-23 19:45:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:55,888 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:45:55,888 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 19:45:55,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:45:55,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 19:45:55,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-09-23 19:45:55,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 19:45:55,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-23 19:45:55,895 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-09-23 19:45:55,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:55,895 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-23 19:45:55,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:45:55,895 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-23 19:45:55,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 19:45:55,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:55,896 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-23 19:45:55,896 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:55,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:55,896 INFO L82 PathProgramCache]: Analyzing trace with hash -2134920377, now seen corresponding path program 25 times [2018-09-23 19:45:55,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:55,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:55,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:55,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:55,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:56,227 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:56,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:56,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:56,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:56,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:56,667 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:56,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2018-09-23 19:45:56,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:45:56,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:45:56,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1429, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:45:56,669 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 44 states. [2018-09-23 19:45:57,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:57,187 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-23 19:45:57,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:45:57,187 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 58 [2018-09-23 19:45:57,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:57,188 INFO L225 Difference]: With dead ends: 92 [2018-09-23 19:45:57,188 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 19:45:57,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=806, Invalid=2500, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:45:57,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 19:45:57,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 19:45:57,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 19:45:57,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-23 19:45:57,197 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-09-23 19:45:57,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:57,197 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-23 19:45:57,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:45:57,198 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-23 19:45:57,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 19:45:57,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:57,198 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-09-23 19:45:57,199 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:57,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:57,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1286350463, now seen corresponding path program 26 times [2018-09-23 19:45:57,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:57,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:57,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:57,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:57,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:57,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:57,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:57,493 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:45:57,534 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:45:57,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:57,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:57,587 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:57,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:57,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-09-23 19:45:57,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:45:57,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:45:57,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:45:57,608 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-09-23 19:45:57,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:57,870 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-23 19:45:57,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:45:57,870 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-09-23 19:45:57,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:57,871 INFO L225 Difference]: With dead ends: 69 [2018-09-23 19:45:57,871 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 19:45:57,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:45:57,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 19:45:57,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-09-23 19:45:57,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 19:45:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-23 19:45:57,880 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-09-23 19:45:57,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:57,880 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-23 19:45:57,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:45:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-23 19:45:57,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 19:45:57,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:57,881 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-09-23 19:45:57,881 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:57,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:57,882 INFO L82 PathProgramCache]: Analyzing trace with hash 767719549, now seen corresponding path program 27 times [2018-09-23 19:45:57,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:57,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:57,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:57,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:57,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:58,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:58,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:58,292 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:45:58,335 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 19:45:58,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:58,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:58,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:58,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2018-09-23 19:45:58,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:45:58,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:45:58,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1636, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:45:58,775 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 47 states. [2018-09-23 19:45:59,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:59,414 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-09-23 19:45:59,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:45:59,414 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 62 [2018-09-23 19:45:59,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:59,415 INFO L225 Difference]: With dead ends: 98 [2018-09-23 19:45:59,415 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 19:45:59,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=916, Invalid=2866, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:45:59,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 19:45:59,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 19:45:59,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 19:45:59,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-23 19:45:59,423 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-09-23 19:45:59,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:59,424 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-23 19:45:59,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:45:59,424 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-23 19:45:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 19:45:59,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:59,424 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-09-23 19:45:59,425 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:59,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:59,425 INFO L82 PathProgramCache]: Analyzing trace with hash 285536695, now seen corresponding path program 28 times [2018-09-23 19:45:59,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:59,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:59,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:59,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:59,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:59,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:59,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:45:59,722 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:45:59,759 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:45:59,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:59,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:59,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:59,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-09-23 19:45:59,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:45:59,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:45:59,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:45:59,827 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-09-23 19:46:00,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:00,103 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-23 19:46:00,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:46:00,103 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-09-23 19:46:00,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:00,104 INFO L225 Difference]: With dead ends: 73 [2018-09-23 19:46:00,105 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 19:46:00,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=497, Invalid=835, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:46:00,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 19:46:00,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-09-23 19:46:00,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 19:46:00,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-23 19:46:00,116 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-09-23 19:46:00,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:00,116 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-23 19:46:00,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:46:00,116 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-23 19:46:00,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 19:46:00,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:00,117 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-23 19:46:00,117 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:00,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:00,117 INFO L82 PathProgramCache]: Analyzing trace with hash -477209805, now seen corresponding path program 29 times [2018-09-23 19:46:00,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:00,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:00,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:00,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:00,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:00,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:00,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:46:00,796 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:46:00,854 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-23 19:46:00,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:00,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:01,333 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:01,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2018-09-23 19:46:01,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:46:01,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:46:01,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1857, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:46:01,335 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 50 states. [2018-09-23 19:46:02,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:02,241 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-09-23 19:46:02,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:46:02,241 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 66 [2018-09-23 19:46:02,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:02,242 INFO L225 Difference]: With dead ends: 104 [2018-09-23 19:46:02,242 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 19:46:02,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1033, Invalid=3257, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:46:02,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 19:46:02,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 19:46:02,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 19:46:02,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-23 19:46:02,256 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-09-23 19:46:02,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:02,256 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-23 19:46:02,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:46:02,257 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-23 19:46:02,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 19:46:02,257 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:02,257 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-09-23 19:46:02,258 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:02,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:02,258 INFO L82 PathProgramCache]: Analyzing trace with hash 35497837, now seen corresponding path program 30 times [2018-09-23 19:46:02,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:02,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:02,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:02,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:02,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:02,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:02,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:02,621 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:46:02,669 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-09-23 19:46:02,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:02,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:02,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:02,750 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-09-23 19:46:02,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:46:02,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:46:02,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:46:02,751 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-09-23 19:46:03,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:03,106 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-23 19:46:03,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:46:03,107 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-09-23 19:46:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:03,108 INFO L225 Difference]: With dead ends: 77 [2018-09-23 19:46:03,108 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 19:46:03,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:46:03,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 19:46:03,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-09-23 19:46:03,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 19:46:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-23 19:46:03,120 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-09-23 19:46:03,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:03,120 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-23 19:46:03,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:46:03,120 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-23 19:46:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 19:46:03,121 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:03,121 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-09-23 19:46:03,121 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:03,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:03,122 INFO L82 PathProgramCache]: Analyzing trace with hash -246383767, now seen corresponding path program 31 times [2018-09-23 19:46:03,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:03,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:03,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:03,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:03,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:04,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:04,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:04,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:04,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:05,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:05,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-09-23 19:46:05,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:46:05,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:46:05,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=2092, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:46:05,039 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 53 states. [2018-09-23 19:46:06,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:06,374 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-09-23 19:46:06,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:46:06,374 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 70 [2018-09-23 19:46:06,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:06,375 INFO L225 Difference]: With dead ends: 110 [2018-09-23 19:46:06,375 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 19:46:06,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1157, Invalid=3673, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:46:06,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 19:46:06,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 19:46:06,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 19:46:06,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-23 19:46:06,387 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-09-23 19:46:06,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:06,387 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-23 19:46:06,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:46:06,387 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-23 19:46:06,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 19:46:06,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:06,388 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-09-23 19:46:06,388 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:06,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:06,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1653283491, now seen corresponding path program 32 times [2018-09-23 19:46:06,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:06,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:06,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:06,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:06,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:06,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:06,680 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:06,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:46:06,731 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:46:06,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:06,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:06,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:06,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-09-23 19:46:06,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:46:06,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:46:06,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:46:06,779 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-09-23 19:46:07,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:07,096 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-23 19:46:07,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:46:07,097 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-09-23 19:46:07,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:07,098 INFO L225 Difference]: With dead ends: 81 [2018-09-23 19:46:07,098 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 19:46:07,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=612, Invalid=1028, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:46:07,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 19:46:07,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-09-23 19:46:07,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 19:46:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-23 19:46:07,109 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-09-23 19:46:07,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:07,109 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-23 19:46:07,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:46:07,110 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-23 19:46:07,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 19:46:07,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:07,110 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-23 19:46:07,110 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:07,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:07,110 INFO L82 PathProgramCache]: Analyzing trace with hash -332531425, now seen corresponding path program 33 times [2018-09-23 19:46:07,110 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:07,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:07,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:07,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:07,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:07,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:07,870 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:07,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:07,877 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:46:07,935 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 19:46:07,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:07,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:08,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:08,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 55 [2018-09-23 19:46:08,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:46:08,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:46:08,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=739, Invalid=2341, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:46:08,561 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 56 states. [2018-09-23 19:46:09,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:09,588 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-23 19:46:09,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:46:09,588 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 74 [2018-09-23 19:46:09,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:09,589 INFO L225 Difference]: With dead ends: 116 [2018-09-23 19:46:09,589 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 19:46:09,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1288, Invalid=4114, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:46:09,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 19:46:09,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 19:46:09,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 19:46:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-23 19:46:09,602 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-09-23 19:46:09,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:09,603 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-23 19:46:09,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:46:09,603 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-23 19:46:09,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 19:46:09,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:09,603 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-09-23 19:46:09,604 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:09,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:09,604 INFO L82 PathProgramCache]: Analyzing trace with hash -198022311, now seen corresponding path program 34 times [2018-09-23 19:46:09,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:09,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:09,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:09,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:09,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:10,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:10,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:10,066 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:46:10,109 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:46:10,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:10,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:10,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:10,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-09-23 19:46:10,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:46:10,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:46:10,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:46:10,208 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-09-23 19:46:10,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:10,550 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-23 19:46:10,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:46:10,551 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-09-23 19:46:10,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:10,552 INFO L225 Difference]: With dead ends: 85 [2018-09-23 19:46:10,552 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 19:46:10,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:46:10,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 19:46:10,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-09-23 19:46:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 19:46:10,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-23 19:46:10,563 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-09-23 19:46:10,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:10,564 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-23 19:46:10,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:46:10,564 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-23 19:46:10,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 19:46:10,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:10,564 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-09-23 19:46:10,564 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:10,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:10,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1320946603, now seen corresponding path program 35 times [2018-09-23 19:46:10,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:10,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:10,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:10,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:10,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:11,422 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:11,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:11,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:11,432 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:46:11,488 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 19:46:11,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:11,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:12,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:12,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2018-09-23 19:46:12,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:46:12,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:46:12,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=2604, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:46:12,515 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 59 states. [2018-09-23 19:46:13,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:13,426 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-09-23 19:46:13,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:46:13,426 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 78 [2018-09-23 19:46:13,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:13,426 INFO L225 Difference]: With dead ends: 122 [2018-09-23 19:46:13,427 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 19:46:13,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1426, Invalid=4580, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:46:13,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 19:46:13,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 19:46:13,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 19:46:13,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-23 19:46:13,437 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-09-23 19:46:13,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:13,437 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-23 19:46:13,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:46:13,438 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-23 19:46:13,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 19:46:13,438 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:13,438 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-09-23 19:46:13,439 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:13,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:13,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1626388879, now seen corresponding path program 36 times [2018-09-23 19:46:13,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:13,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:13,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:13,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:13,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:14,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:14,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:14,204 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:46:14,264 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-23 19:46:14,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:14,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:14,316 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:14,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-09-23 19:46:14,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:46:14,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:46:14,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:46:14,317 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-09-23 19:46:14,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:14,721 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-09-23 19:46:14,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:46:14,721 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-09-23 19:46:14,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:14,722 INFO L225 Difference]: With dead ends: 89 [2018-09-23 19:46:14,722 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 19:46:14,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=739, Invalid=1241, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:46:14,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 19:46:14,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-09-23 19:46:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 19:46:14,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-23 19:46:14,737 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-09-23 19:46:14,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:14,737 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-23 19:46:14,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:46:14,737 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-23 19:46:14,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 19:46:14,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:14,737 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-23 19:46:14,738 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:14,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:14,738 INFO L82 PathProgramCache]: Analyzing trace with hash -408449781, now seen corresponding path program 37 times [2018-09-23 19:46:14,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:14,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:14,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:14,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:14,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:15,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:15,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:15,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:15,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:16,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:16,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 61 [2018-09-23 19:46:16,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 19:46:16,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 19:46:16,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2881, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:46:16,439 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 62 states. [2018-09-23 19:46:17,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:17,374 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-09-23 19:46:17,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:46:17,374 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 82 [2018-09-23 19:46:17,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:17,374 INFO L225 Difference]: With dead ends: 128 [2018-09-23 19:46:17,375 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 19:46:17,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1571, Invalid=5071, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:46:17,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 19:46:17,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 19:46:17,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 19:46:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-23 19:46:17,386 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-09-23 19:46:17,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:17,386 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-23 19:46:17,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 19:46:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-23 19:46:17,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 19:46:17,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:17,387 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-09-23 19:46:17,387 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:17,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:17,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1130683067, now seen corresponding path program 38 times [2018-09-23 19:46:17,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:17,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:17,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:17,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:17,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:17,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:17,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:17,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:46:17,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:46:17,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:17,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:17,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:17,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-09-23 19:46:17,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:46:17,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:46:17,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:46:17,871 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-09-23 19:46:18,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:18,252 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-09-23 19:46:18,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:46:18,253 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-09-23 19:46:18,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:18,253 INFO L225 Difference]: With dead ends: 93 [2018-09-23 19:46:18,254 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 19:46:18,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:46:18,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 19:46:18,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-09-23 19:46:18,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 19:46:18,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-09-23 19:46:18,267 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-09-23 19:46:18,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:18,268 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-09-23 19:46:18,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:46:18,268 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-09-23 19:46:18,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 19:46:18,268 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:18,268 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-09-23 19:46:18,268 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:18,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:18,269 INFO L82 PathProgramCache]: Analyzing trace with hash 40231745, now seen corresponding path program 39 times [2018-09-23 19:46:18,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:18,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:18,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:18,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:18,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:18,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:18,957 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:18,964 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:46:19,024 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 19:46:19,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:19,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:19,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:19,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-09-23 19:46:19,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 19:46:19,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 19:46:19,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=3172, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:46:19,770 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 65 states. [2018-09-23 19:46:21,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:21,023 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-09-23 19:46:21,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:46:21,024 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 86 [2018-09-23 19:46:21,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:21,024 INFO L225 Difference]: With dead ends: 134 [2018-09-23 19:46:21,024 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 19:46:21,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1723, Invalid=5587, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:46:21,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 19:46:21,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 19:46:21,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 19:46:21,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-23 19:46:21,037 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-09-23 19:46:21,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:21,037 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-23 19:46:21,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 19:46:21,037 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-23 19:46:21,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 19:46:21,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:21,038 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-09-23 19:46:21,038 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:21,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:21,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2030121349, now seen corresponding path program 40 times [2018-09-23 19:46:21,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:21,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:21,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:21,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:21,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:21,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:21,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:21,471 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:46:21,521 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:46:21,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:21,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:21,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:21,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-09-23 19:46:21,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:46:21,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:46:21,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:46:21,581 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-09-23 19:46:22,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:22,043 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-09-23 19:46:22,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:46:22,043 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-09-23 19:46:22,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:22,044 INFO L225 Difference]: With dead ends: 97 [2018-09-23 19:46:22,044 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 19:46:22,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=878, Invalid=1474, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:46:22,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 19:46:22,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-09-23 19:46:22,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 19:46:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-23 19:46:22,060 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-09-23 19:46:22,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:22,060 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-23 19:46:22,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:46:22,061 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-23 19:46:22,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 19:46:22,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:22,061 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-23 19:46:22,061 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:22,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:22,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1031530761, now seen corresponding path program 41 times [2018-09-23 19:46:22,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:22,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:22,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:22,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:22,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:22,964 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:22,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:22,973 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:46:23,036 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 19:46:23,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:23,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:23,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:23,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 67 [2018-09-23 19:46:23,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 19:46:23,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 19:46:23,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1079, Invalid=3477, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:46:23,912 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 68 states. [2018-09-23 19:46:25,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:25,054 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-23 19:46:25,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:46:25,054 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 90 [2018-09-23 19:46:25,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:25,054 INFO L225 Difference]: With dead ends: 140 [2018-09-23 19:46:25,054 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 19:46:25,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1882, Invalid=6128, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:46:25,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 19:46:25,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 19:46:25,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 19:46:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-23 19:46:25,069 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-09-23 19:46:25,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:25,069 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-23 19:46:25,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 19:46:25,069 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-23 19:46:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 19:46:25,070 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:25,070 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-09-23 19:46:25,070 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:25,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:25,070 INFO L82 PathProgramCache]: Analyzing trace with hash 769709361, now seen corresponding path program 42 times [2018-09-23 19:46:25,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:25,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:25,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:25,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:25,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:25,696 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:25,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:25,703 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:46:25,770 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-09-23 19:46:25,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:25,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:26,182 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:26,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-09-23 19:46:26,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:46:26,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:46:26,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:46:26,184 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-09-23 19:46:27,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:27,303 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-09-23 19:46:27,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:46:27,303 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-09-23 19:46:27,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:27,303 INFO L225 Difference]: With dead ends: 101 [2018-09-23 19:46:27,304 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 19:46:27,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:46:27,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 19:46:27,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-09-23 19:46:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 19:46:27,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-09-23 19:46:27,318 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-09-23 19:46:27,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:27,318 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-09-23 19:46:27,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:46:27,318 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-09-23 19:46:27,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 19:46:27,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:27,319 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-09-23 19:46:27,319 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:27,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:27,320 INFO L82 PathProgramCache]: Analyzing trace with hash 956254253, now seen corresponding path program 43 times [2018-09-23 19:46:27,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:27,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:27,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:27,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:27,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:28,114 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:28,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:28,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:28,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:29,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:29,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2018-09-23 19:46:29,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 19:46:29,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 19:46:29,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1174, Invalid=3796, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:46:29,060 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 71 states. [2018-09-23 19:46:30,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:30,299 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-09-23 19:46:30,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:46:30,299 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 94 [2018-09-23 19:46:30,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:30,300 INFO L225 Difference]: With dead ends: 146 [2018-09-23 19:46:30,300 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 19:46:30,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2048, Invalid=6694, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:46:30,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 19:46:30,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 19:46:30,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 19:46:30,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-23 19:46:30,314 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-09-23 19:46:30,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:30,315 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-23 19:46:30,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 19:46:30,315 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-23 19:46:30,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 19:46:30,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:30,315 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-09-23 19:46:30,316 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:30,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:30,316 INFO L82 PathProgramCache]: Analyzing trace with hash 251550055, now seen corresponding path program 44 times [2018-09-23 19:46:30,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:30,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:30,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:30,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:30,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:30,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:30,881 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:30,889 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:46:30,948 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:46:30,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:30,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:31,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:31,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-09-23 19:46:31,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:46:31,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:46:31,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:46:31,038 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-09-23 19:46:31,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:31,842 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-09-23 19:46:31,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:46:31,843 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-09-23 19:46:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:31,843 INFO L225 Difference]: With dead ends: 105 [2018-09-23 19:46:31,843 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 19:46:31,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1029, Invalid=1727, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:46:31,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 19:46:31,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-09-23 19:46:31,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 19:46:31,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-23 19:46:31,860 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-09-23 19:46:31,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:31,860 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-23 19:46:31,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:46:31,860 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-23 19:46:31,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 19:46:31,861 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:31,861 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-23 19:46:31,861 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:31,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:31,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1221367523, now seen corresponding path program 45 times [2018-09-23 19:46:31,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:31,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:31,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:31,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:31,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:33,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:33,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:33,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:46:33,789 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 19:46:33,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:33,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:34,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:34,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2018-09-23 19:46:34,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 19:46:34,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 19:46:34,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1273, Invalid=4129, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:46:34,858 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 74 states. [2018-09-23 19:46:36,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:36,193 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-09-23 19:46:36,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:46:36,193 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 98 [2018-09-23 19:46:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:36,194 INFO L225 Difference]: With dead ends: 152 [2018-09-23 19:46:36,194 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 19:46:36,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2221, Invalid=7285, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:46:36,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 19:46:36,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 19:46:36,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 19:46:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-23 19:46:36,212 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-09-23 19:46:36,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:36,212 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-23 19:46:36,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 19:46:36,212 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-23 19:46:36,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 19:46:36,212 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:36,212 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-09-23 19:46:36,213 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:36,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:36,213 INFO L82 PathProgramCache]: Analyzing trace with hash -99845347, now seen corresponding path program 46 times [2018-09-23 19:46:36,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:36,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:36,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:36,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:36,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:37,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:37,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:37,164 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:46:37,223 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:46:37,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:37,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:37,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:37,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:37,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-09-23 19:46:37,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:46:37,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:46:37,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:46:37,293 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-09-23 19:46:37,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:37,770 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-09-23 19:46:37,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:46:37,771 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-09-23 19:46:37,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:37,771 INFO L225 Difference]: With dead ends: 109 [2018-09-23 19:46:37,771 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 19:46:37,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:46:37,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 19:46:37,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-09-23 19:46:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 19:46:37,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-09-23 19:46:37,794 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-09-23 19:46:37,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:37,794 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-09-23 19:46:37,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:46:37,794 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-09-23 19:46:37,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 19:46:37,795 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:37,795 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-09-23 19:46:37,795 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:37,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:37,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1462164711, now seen corresponding path program 47 times [2018-09-23 19:46:37,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:37,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:37,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:37,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:37,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:39,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:39,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:39,231 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:46:39,315 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 19:46:39,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:39,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:40,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:40,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-09-23 19:46:40,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 19:46:40,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 19:46:40,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=4476, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:46:40,396 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 77 states. [2018-09-23 19:46:42,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:42,038 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-09-23 19:46:42,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:46:42,038 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 102 [2018-09-23 19:46:42,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:42,039 INFO L225 Difference]: With dead ends: 158 [2018-09-23 19:46:42,039 INFO L226 Difference]: Without dead ends: 105 [2018-09-23 19:46:42,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2401, Invalid=7901, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:46:42,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-23 19:46:42,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-23 19:46:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 19:46:42,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-23 19:46:42,063 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-09-23 19:46:42,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:42,063 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-23 19:46:42,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 19:46:42,063 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-23 19:46:42,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 19:46:42,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:42,064 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-09-23 19:46:42,064 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:42,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:42,064 INFO L82 PathProgramCache]: Analyzing trace with hash 850942547, now seen corresponding path program 48 times [2018-09-23 19:46:42,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:42,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:42,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:42,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:42,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:42,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:42,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:42,779 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:46:42,856 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-23 19:46:42,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:42,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:42,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:42,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-09-23 19:46:42,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:46:42,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:46:42,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:46:42,931 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-09-23 19:46:43,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:43,472 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-09-23 19:46:43,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:46:43,473 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-09-23 19:46:43,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:43,473 INFO L225 Difference]: With dead ends: 113 [2018-09-23 19:46:43,474 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 19:46:43,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1192, Invalid=2000, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:46:43,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 19:46:43,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-09-23 19:46:43,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 19:46:43,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-23 19:46:43,496 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-09-23 19:46:43,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:43,497 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-23 19:46:43,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:46:43,497 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-23 19:46:43,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 19:46:43,497 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:43,497 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-23 19:46:43,498 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:43,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:43,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1711934671, now seen corresponding path program 49 times [2018-09-23 19:46:43,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:43,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:43,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:43,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:43,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:45,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:45,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:45,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:45,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:46,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:46,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2018-09-23 19:46:46,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 19:46:46,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 19:46:46,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=4837, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:46:46,473 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 80 states. [2018-09-23 19:46:48,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:48,252 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-23 19:46:48,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:46:48,252 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 106 [2018-09-23 19:46:48,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:48,253 INFO L225 Difference]: With dead ends: 164 [2018-09-23 19:46:48,253 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 19:46:48,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2588, Invalid=8542, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:46:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 19:46:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 19:46:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 19:46:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-23 19:46:48,272 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-09-23 19:46:48,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:48,272 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-23 19:46:48,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 19:46:48,272 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-23 19:46:48,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 19:46:48,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:48,273 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-09-23 19:46:48,273 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:48,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:48,274 INFO L82 PathProgramCache]: Analyzing trace with hash -223930615, now seen corresponding path program 50 times [2018-09-23 19:46:48,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:48,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:48,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:48,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:48,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:49,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:49,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:49,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:46:49,316 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:46:49,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:49,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:49,411 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:49,411 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-09-23 19:46:49,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:46:49,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:46:49,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:46:49,412 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-09-23 19:46:49,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:49,949 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-09-23 19:46:49,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:46:49,949 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-09-23 19:46:49,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:49,950 INFO L225 Difference]: With dead ends: 117 [2018-09-23 19:46:49,950 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 19:46:49,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:46:49,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 19:46:49,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-09-23 19:46:49,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 19:46:49,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-09-23 19:46:49,969 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-09-23 19:46:49,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:49,969 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-09-23 19:46:49,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:46:49,970 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-09-23 19:46:49,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 19:46:49,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:49,970 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-09-23 19:46:49,971 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:49,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:49,971 INFO L82 PathProgramCache]: Analyzing trace with hash -449022971, now seen corresponding path program 51 times [2018-09-23 19:46:49,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:49,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:49,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:49,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:49,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:51,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:51,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:51,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:46:51,139 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-23 19:46:51,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:51,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:52,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:52,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2018-09-23 19:46:52,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 19:46:52,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 19:46:52,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1594, Invalid=5212, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:46:52,742 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 83 states. [2018-09-23 19:46:54,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:54,141 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-09-23 19:46:54,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:46:54,142 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 110 [2018-09-23 19:46:54,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:54,142 INFO L225 Difference]: With dead ends: 170 [2018-09-23 19:46:54,142 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 19:46:54,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2782, Invalid=9208, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 19:46:54,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 19:46:54,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-23 19:46:54,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 19:46:54,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-23 19:46:54,165 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-09-23 19:46:54,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:54,165 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-23 19:46:54,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 19:46:54,165 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-23 19:46:54,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 19:46:54,166 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:54,166 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-09-23 19:46:54,166 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:54,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:54,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1802883391, now seen corresponding path program 52 times [2018-09-23 19:46:54,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:54,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:54,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:54,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:54,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:54,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:54,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:54,605 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:46:54,669 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:46:54,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:54,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:54,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:54,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-09-23 19:46:54,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:46:54,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:46:54,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:46:54,931 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-09-23 19:46:55,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:55,594 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-09-23 19:46:55,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:46:55,594 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-09-23 19:46:55,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:55,595 INFO L225 Difference]: With dead ends: 121 [2018-09-23 19:46:55,595 INFO L226 Difference]: Without dead ends: 119 [2018-09-23 19:46:55,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1367, Invalid=2293, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:46:55,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-23 19:46:55,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-09-23 19:46:55,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 19:46:55,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-23 19:46:55,624 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-09-23 19:46:55,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:55,624 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-23 19:46:55,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:46:55,624 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-23 19:46:55,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 19:46:55,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:55,625 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-23 19:46:55,625 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:55,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:55,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1699051707, now seen corresponding path program 53 times [2018-09-23 19:46:55,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:55,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:55,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:55,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:55,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:57,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:57,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:46:57,360 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:46:57,448 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 19:46:57,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:57,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:58,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:58,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 85 [2018-09-23 19:46:58,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 19:46:58,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 19:46:58,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1709, Invalid=5601, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:46:58,831 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 86 states. [2018-09-23 19:47:00,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:00,113 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-09-23 19:47:00,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:47:00,113 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 114 [2018-09-23 19:47:00,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:00,114 INFO L225 Difference]: With dead ends: 176 [2018-09-23 19:47:00,114 INFO L226 Difference]: Without dead ends: 117 [2018-09-23 19:47:00,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2592 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2983, Invalid=9899, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 19:47:00,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-23 19:47:00,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-23 19:47:00,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-23 19:47:00,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-23 19:47:00,134 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-09-23 19:47:00,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:00,134 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-23 19:47:00,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 19:47:00,134 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-23 19:47:00,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-23 19:47:00,135 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:00,135 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-09-23 19:47:00,135 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:00,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:00,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1220126965, now seen corresponding path program 54 times [2018-09-23 19:47:00,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:00,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:00,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:00,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:00,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:00,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:00,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:47:00,635 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:47:00,725 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-09-23 19:47:00,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:00,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:01,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:01,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-09-23 19:47:01,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:47:01,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:47:01,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:47:01,136 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-09-23 19:47:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:01,733 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-09-23 19:47:01,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:47:01,733 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-09-23 19:47:01,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:01,734 INFO L225 Difference]: With dead ends: 125 [2018-09-23 19:47:01,734 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 19:47:01,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:47:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 19:47:01,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-09-23 19:47:01,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 19:47:01,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-09-23 19:47:01,756 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-09-23 19:47:01,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:01,757 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-09-23 19:47:01,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:47:01,757 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-09-23 19:47:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-23 19:47:01,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:01,757 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-09-23 19:47:01,758 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:01,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:01,758 INFO L82 PathProgramCache]: Analyzing trace with hash 15874801, now seen corresponding path program 55 times [2018-09-23 19:47:01,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:01,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:01,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:01,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:01,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:03,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:03,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-23 19:47:03,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:47:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:03,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:04,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:04,828 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2018-09-23 19:47:04,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 19:47:04,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 19:47:04,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1828, Invalid=6004, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:47:04,829 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 89 states. [2018-09-23 19:47:06,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:06,707 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-09-23 19:47:06,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:47:06,707 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 118 [2018-09-23 19:47:06,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:06,708 INFO L225 Difference]: With dead ends: 182 [2018-09-23 19:47:06,708 INFO L226 Difference]: Without dead ends: 121 [2018-09-23 19:47:06,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2786 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3191, Invalid=10615, Unknown=0, NotChecked=0, Total=13806 [2018-09-23 19:47:06,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-23 19:47:06,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-23 19:47:06,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-23 19:47:06,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-09-23 19:47:06,728 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-09-23 19:47:06,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:06,729 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-09-23 19:47:06,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 19:47:06,729 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-09-23 19:47:06,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-23 19:47:06,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:06,729 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-09-23 19:47:06,729 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:06,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:06,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1308639701, now seen corresponding path program 56 times [2018-09-23 19:47:06,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:06,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:06,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:06,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:47:06,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:07,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:07,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:47:07,256 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:47:07,326 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:47:07,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:07,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:07,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:07,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-09-23 19:47:07,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:47:07,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:47:07,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:47:07,614 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-09-23 19:47:08,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:08,247 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-09-23 19:47:08,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:47:08,247 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-09-23 19:47:08,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:08,248 INFO L225 Difference]: With dead ends: 129 [2018-09-23 19:47:08,248 INFO L226 Difference]: Without dead ends: 127 [2018-09-23 19:47:08,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1554, Invalid=2606, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:47:08,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-23 19:47:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-09-23 19:47:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-23 19:47:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-23 19:47:08,270 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-09-23 19:47:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:08,270 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-23 19:47:08,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:47:08,270 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-23 19:47:08,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-23 19:47:08,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:08,271 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-23 19:47:08,271 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:08,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:08,271 INFO L82 PathProgramCache]: Analyzing trace with hash 822598311, now seen corresponding path program 57 times [2018-09-23 19:47:08,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:08,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:08,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:08,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:08,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:09,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:09,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:09,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:47:09,443 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:47:09,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-23 19:47:09,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:09,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:11,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:11,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 91 [2018-09-23 19:47:11,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 19:47:11,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 19:47:11,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1951, Invalid=6421, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:47:11,099 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 92 states. [2018-09-23 19:47:13,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:13,316 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-09-23 19:47:13,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:47:13,316 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 122 [2018-09-23 19:47:13,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:13,316 INFO L225 Difference]: With dead ends: 188 [2018-09-23 19:47:13,317 INFO L226 Difference]: Without dead ends: 125 [2018-09-23 19:47:13,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3406, Invalid=11356, Unknown=0, NotChecked=0, Total=14762 [2018-09-23 19:47:13,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-23 19:47:13,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-23 19:47:13,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-23 19:47:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-09-23 19:47:13,338 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-09-23 19:47:13,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:13,338 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-09-23 19:47:13,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 19:47:13,338 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-09-23 19:47:13,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-23 19:47:13,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:13,339 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-09-23 19:47:13,339 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:13,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:13,339 INFO L82 PathProgramCache]: Analyzing trace with hash -858967839, now seen corresponding path program 58 times [2018-09-23 19:47:13,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:13,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:13,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:13,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:13,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:13,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:13,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:47:13,840 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:47:13,920 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:47:13,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:13,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:14,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:14,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-09-23 19:47:14,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:47:14,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:47:14,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:47:14,076 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-09-23 19:47:14,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:14,751 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-09-23 19:47:14,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:47:14,752 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-09-23 19:47:14,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:14,752 INFO L225 Difference]: With dead ends: 133 [2018-09-23 19:47:14,752 INFO L226 Difference]: Without dead ends: 131 [2018-09-23 19:47:14,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:47:14,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-23 19:47:14,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-09-23 19:47:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-23 19:47:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-09-23 19:47:14,775 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-09-23 19:47:14,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:14,776 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-09-23 19:47:14,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:47:14,776 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-09-23 19:47:14,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-23 19:47:14,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:14,776 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-09-23 19:47:14,777 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:14,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:14,777 INFO L82 PathProgramCache]: Analyzing trace with hash -834439203, now seen corresponding path program 59 times [2018-09-23 19:47:14,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:14,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:14,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:14,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:14,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:16,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:16,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:47:16,280 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:47:16,382 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-23 19:47:16,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:16,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:18,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:18,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 94 [2018-09-23 19:47:18,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-23 19:47:18,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-23 19:47:18,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2078, Invalid=6852, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 19:47:18,169 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 95 states. [2018-09-23 19:47:19,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:19,843 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-09-23 19:47:19,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 19:47:19,844 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 126 [2018-09-23 19:47:19,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:19,844 INFO L225 Difference]: With dead ends: 194 [2018-09-23 19:47:19,844 INFO L226 Difference]: Without dead ends: 129 [2018-09-23 19:47:19,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3195 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3628, Invalid=12122, Unknown=0, NotChecked=0, Total=15750 [2018-09-23 19:47:19,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-23 19:47:19,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-23 19:47:19,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-23 19:47:19,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-09-23 19:47:19,868 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-09-23 19:47:19,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:19,868 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-09-23 19:47:19,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-23 19:47:19,868 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-09-23 19:47:19,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-23 19:47:19,869 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:19,869 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-09-23 19:47:19,869 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:19,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:19,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1096867561, now seen corresponding path program 60 times [2018-09-23 19:47:19,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:19,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:19,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:19,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:19,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:20,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:20,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:47:20,559 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:47:20,663 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-23 19:47:20,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:20,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:20,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:20,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-09-23 19:47:20,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:47:20,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:47:20,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:47:20,805 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-09-23 19:47:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:21,495 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-09-23 19:47:21,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:47:21,495 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-09-23 19:47:21,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:21,496 INFO L225 Difference]: With dead ends: 137 [2018-09-23 19:47:21,496 INFO L226 Difference]: Without dead ends: 135 [2018-09-23 19:47:21,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1753, Invalid=2939, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:47:21,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-23 19:47:21,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-09-23 19:47:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-23 19:47:21,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-23 19:47:21,522 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-09-23 19:47:21,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:21,522 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-23 19:47:21,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:47:21,522 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-23 19:47:21,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-23 19:47:21,522 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:21,522 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-23 19:47:21,523 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:21,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:21,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1822805357, now seen corresponding path program 61 times [2018-09-23 19:47:21,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:21,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:21,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:21,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:21,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:23,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:23,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:47:23,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:47:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:23,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:25,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:25,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 97 [2018-09-23 19:47:25,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 19:47:25,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 19:47:25,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2209, Invalid=7297, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:47:25,063 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 98 states. [2018-09-23 19:47:27,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:27,366 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-09-23 19:47:27,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 19:47:27,366 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 130 [2018-09-23 19:47:27,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:27,367 INFO L225 Difference]: With dead ends: 200 [2018-09-23 19:47:27,367 INFO L226 Difference]: Without dead ends: 133 [2018-09-23 19:47:27,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3410 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3857, Invalid=12913, Unknown=0, NotChecked=0, Total=16770 [2018-09-23 19:47:27,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-23 19:47:27,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-23 19:47:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-23 19:47:27,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-09-23 19:47:27,395 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-09-23 19:47:27,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:27,395 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-09-23 19:47:27,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 19:47:27,395 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-09-23 19:47:27,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-23 19:47:27,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:27,396 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-09-23 19:47:27,396 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:27,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:27,396 INFO L82 PathProgramCache]: Analyzing trace with hash 787132109, now seen corresponding path program 62 times [2018-09-23 19:47:27,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:27,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:27,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:27,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:47:27,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:28,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:28,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:47:28,286 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:47:28,366 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:47:28,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:28,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:28,632 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:28,632 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-09-23 19:47:28,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:47:28,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:47:28,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:47:28,633 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-09-23 19:47:29,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:29,401 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-09-23 19:47:29,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:47:29,402 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-09-23 19:47:29,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:29,402 INFO L225 Difference]: With dead ends: 141 [2018-09-23 19:47:29,402 INFO L226 Difference]: Without dead ends: 139 [2018-09-23 19:47:29,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:47:29,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-23 19:47:29,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-09-23 19:47:29,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-23 19:47:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-09-23 19:47:29,429 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-09-23 19:47:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:29,430 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-09-23 19:47:29,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:47:29,430 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-09-23 19:47:29,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-23 19:47:29,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:29,431 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-09-23 19:47:29,431 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:29,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:29,431 INFO L82 PathProgramCache]: Analyzing trace with hash 519645897, now seen corresponding path program 63 times [2018-09-23 19:47:29,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:29,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:29,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:29,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:29,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:31,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:31,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:47:31,726 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:47:31,839 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-23 19:47:31,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:31,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:34,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:34,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 100 [2018-09-23 19:47:34,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-23 19:47:34,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-23 19:47:34,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2344, Invalid=7756, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 19:47:34,528 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 101 states. [2018-09-23 19:47:36,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:36,974 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-09-23 19:47:36,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 19:47:36,974 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 134 [2018-09-23 19:47:36,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:36,975 INFO L225 Difference]: With dead ends: 206 [2018-09-23 19:47:36,975 INFO L226 Difference]: Without dead ends: 137 [2018-09-23 19:47:36,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3632 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=4093, Invalid=13729, Unknown=0, NotChecked=0, Total=17822 [2018-09-23 19:47:36,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-23 19:47:37,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-23 19:47:37,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-23 19:47:37,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-09-23 19:47:37,001 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-09-23 19:47:37,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:37,002 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-09-23 19:47:37,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-23 19:47:37,002 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-09-23 19:47:37,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-23 19:47:37,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:37,003 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-09-23 19:47:37,003 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:37,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:37,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1226635779, now seen corresponding path program 64 times [2018-09-23 19:47:37,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:37,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:37,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:37,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:37,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:37,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:37,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:47:37,574 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:47:37,659 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:47:37,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:37,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:37,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:37,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-09-23 19:47:37,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:47:37,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:47:37,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:47:37,990 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-09-23 19:47:38,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:38,811 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-09-23 19:47:38,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:47:38,811 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-09-23 19:47:38,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:38,812 INFO L225 Difference]: With dead ends: 145 [2018-09-23 19:47:38,813 INFO L226 Difference]: Without dead ends: 143 [2018-09-23 19:47:38,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1964, Invalid=3292, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:47:38,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-23 19:47:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-09-23 19:47:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-23 19:47:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-09-23 19:47:38,841 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-09-23 19:47:38,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:38,842 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-09-23 19:47:38,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:47:38,842 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-09-23 19:47:38,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-23 19:47:38,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:38,842 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-09-23 19:47:38,843 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:38,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:38,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1975877759, now seen corresponding path program 65 times [2018-09-23 19:47:38,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:38,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:38,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:38,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:38,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:40,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:40,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:47:40,343 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:47:40,458 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-23 19:47:40,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:40,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:42,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:42,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:42,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 103 [2018-09-23 19:47:42,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 19:47:42,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 19:47:42,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2483, Invalid=8229, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:47:42,316 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 104 states. [2018-09-23 19:47:45,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:45,052 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-09-23 19:47:45,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 19:47:45,052 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 138 [2018-09-23 19:47:45,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:45,053 INFO L225 Difference]: With dead ends: 212 [2018-09-23 19:47:45,053 INFO L226 Difference]: Without dead ends: 141 [2018-09-23 19:47:45,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3861 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4336, Invalid=14570, Unknown=0, NotChecked=0, Total=18906 [2018-09-23 19:47:45,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-23 19:47:45,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-23 19:47:45,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-23 19:47:45,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-09-23 19:47:45,080 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-09-23 19:47:45,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:45,080 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-09-23 19:47:45,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 19:47:45,080 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-09-23 19:47:45,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-23 19:47:45,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:45,081 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-09-23 19:47:45,081 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:45,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:45,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1050354361, now seen corresponding path program 66 times [2018-09-23 19:47:45,081 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:45,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:45,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:45,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:45,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:45,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:45,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:47:45,690 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:47:45,803 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-09-23 19:47:45,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:45,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:45,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:45,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-09-23 19:47:45,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:47:45,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:47:45,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:47:45,889 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-09-23 19:47:46,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:46,667 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-09-23 19:47:46,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 19:47:46,667 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-09-23 19:47:46,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:46,668 INFO L225 Difference]: With dead ends: 149 [2018-09-23 19:47:46,669 INFO L226 Difference]: Without dead ends: 147 [2018-09-23 19:47:46,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:47:46,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-23 19:47:46,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-09-23 19:47:46,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-23 19:47:46,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-09-23 19:47:46,697 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-09-23 19:47:46,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:46,697 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-09-23 19:47:46,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:47:46,697 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-09-23 19:47:46,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-23 19:47:46,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:46,698 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-09-23 19:47:46,698 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:46,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:46,698 INFO L82 PathProgramCache]: Analyzing trace with hash 73159605, now seen corresponding path program 67 times [2018-09-23 19:47:46,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:46,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:46,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:46,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:46,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:48,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:48,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:47:48,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:47:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:48,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:50,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:50,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 106 [2018-09-23 19:47:50,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-23 19:47:50,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-23 19:47:50,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2626, Invalid=8716, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 19:47:50,620 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 107 states. [2018-09-23 19:47:53,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:53,419 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-09-23 19:47:53,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 19:47:53,419 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 142 [2018-09-23 19:47:53,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:53,420 INFO L225 Difference]: With dead ends: 218 [2018-09-23 19:47:53,420 INFO L226 Difference]: Without dead ends: 145 [2018-09-23 19:47:53,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4097 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4586, Invalid=15436, Unknown=0, NotChecked=0, Total=20022 [2018-09-23 19:47:53,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-23 19:47:53,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-23 19:47:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-23 19:47:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-09-23 19:47:53,457 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-09-23 19:47:53,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:53,458 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-09-23 19:47:53,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-23 19:47:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-09-23 19:47:53,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-23 19:47:53,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:53,459 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-09-23 19:47:53,459 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:53,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:53,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1220692207, now seen corresponding path program 68 times [2018-09-23 19:47:53,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:53,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:53,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:53,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:47:53,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:54,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:54,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:47:54,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:47:54,202 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:47:54,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:54,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:54,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:54,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-09-23 19:47:54,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:47:54,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:47:54,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:47:54,289 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2018-09-23 19:47:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:55,099 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-09-23 19:47:55,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 19:47:55,099 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2018-09-23 19:47:55,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:55,100 INFO L225 Difference]: With dead ends: 153 [2018-09-23 19:47:55,100 INFO L226 Difference]: Without dead ends: 151 [2018-09-23 19:47:55,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2187, Invalid=3665, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:47:55,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-23 19:47:55,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-09-23 19:47:55,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-23 19:47:55,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-09-23 19:47:55,138 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-09-23 19:47:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:55,138 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-09-23 19:47:55,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:47:55,139 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-09-23 19:47:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-23 19:47:55,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:55,139 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-09-23 19:47:55,140 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:55,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:55,140 INFO L82 PathProgramCache]: Analyzing trace with hash 559072363, now seen corresponding path program 69 times [2018-09-23 19:47:55,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:55,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:55,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:55,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:55,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:56,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:56,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:47:56,800 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:47:56,929 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-23 19:47:56,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:56,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:59,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:59,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 109 [2018-09-23 19:47:59,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-23 19:47:59,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-23 19:47:59,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2773, Invalid=9217, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 19:47:59,281 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 110 states. [2018-09-23 19:48:02,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:02,188 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2018-09-23 19:48:02,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 19:48:02,188 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 146 [2018-09-23 19:48:02,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:02,189 INFO L225 Difference]: With dead ends: 224 [2018-09-23 19:48:02,189 INFO L226 Difference]: Without dead ends: 149 [2018-09-23 19:48:02,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4340 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4843, Invalid=16327, Unknown=0, NotChecked=0, Total=21170 [2018-09-23 19:48:02,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-23 19:48:02,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-23 19:48:02,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-23 19:48:02,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-09-23 19:48:02,230 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-09-23 19:48:02,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:02,231 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-09-23 19:48:02,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-23 19:48:02,231 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-09-23 19:48:02,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-23 19:48:02,232 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:02,232 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-09-23 19:48:02,232 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:02,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:02,232 INFO L82 PathProgramCache]: Analyzing trace with hash 719817893, now seen corresponding path program 70 times [2018-09-23 19:48:02,232 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:02,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:02,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:02,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:02,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:03,040 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:03,040 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:03,047 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:48:03,142 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:48:03,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:03,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:03,230 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:03,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-09-23 19:48:03,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:48:03,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:48:03,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:48:03,232 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-09-23 19:48:04,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:04,271 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-09-23 19:48:04,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:48:04,271 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-09-23 19:48:04,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:04,272 INFO L225 Difference]: With dead ends: 157 [2018-09-23 19:48:04,272 INFO L226 Difference]: Without dead ends: 155 [2018-09-23 19:48:04,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2303, Invalid=3859, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:48:04,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-23 19:48:04,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2018-09-23 19:48:04,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-23 19:48:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-09-23 19:48:04,309 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2018-09-23 19:48:04,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:04,309 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-09-23 19:48:04,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:48:04,309 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-09-23 19:48:04,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-23 19:48:04,310 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:04,310 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-09-23 19:48:04,310 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:04,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:04,311 INFO L82 PathProgramCache]: Analyzing trace with hash 255193761, now seen corresponding path program 71 times [2018-09-23 19:48:04,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:04,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:04,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:04,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:04,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:06,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:06,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:06,032 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:48:06,160 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 19:48:06,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:06,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:08,276 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:08,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 112 [2018-09-23 19:48:08,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-23 19:48:08,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-23 19:48:08,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2924, Invalid=9732, Unknown=0, NotChecked=0, Total=12656 [2018-09-23 19:48:08,278 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 113 states. [2018-09-23 19:48:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:11,457 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-09-23 19:48:11,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 19:48:11,457 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 150 [2018-09-23 19:48:11,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:11,458 INFO L225 Difference]: With dead ends: 230 [2018-09-23 19:48:11,458 INFO L226 Difference]: Without dead ends: 153 [2018-09-23 19:48:11,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4590 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5107, Invalid=17243, Unknown=0, NotChecked=0, Total=22350 [2018-09-23 19:48:11,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-23 19:48:11,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-23 19:48:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-23 19:48:11,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-09-23 19:48:11,497 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-09-23 19:48:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:11,497 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-09-23 19:48:11,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-23 19:48:11,497 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-09-23 19:48:11,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-23 19:48:11,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:11,498 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-09-23 19:48:11,498 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:11,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:11,498 INFO L82 PathProgramCache]: Analyzing trace with hash 878185947, now seen corresponding path program 72 times [2018-09-23 19:48:11,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:11,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:11,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:11,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:11,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:12,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:12,830 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:12,837 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:48:12,971 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-23 19:48:12,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:12,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:13,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:13,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-09-23 19:48:13,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:48:13,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:48:13,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:48:13,062 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 43 states. [2018-09-23 19:48:14,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:14,206 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-09-23 19:48:14,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 19:48:14,206 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 152 [2018-09-23 19:48:14,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:14,207 INFO L225 Difference]: With dead ends: 161 [2018-09-23 19:48:14,207 INFO L226 Difference]: Without dead ends: 159 [2018-09-23 19:48:14,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2422, Invalid=4058, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:48:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-23 19:48:14,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-09-23 19:48:14,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-23 19:48:14,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-09-23 19:48:14,241 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-09-23 19:48:14,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:14,241 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-09-23 19:48:14,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:48:14,241 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-09-23 19:48:14,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-23 19:48:14,242 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:14,242 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-09-23 19:48:14,242 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:14,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:14,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2123038295, now seen corresponding path program 73 times [2018-09-23 19:48:14,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:14,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:14,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:14,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:14,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:16,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:16,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:16,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:16,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:18,469 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:18,469 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 115 [2018-09-23 19:48:18,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-23 19:48:18,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-23 19:48:18,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3079, Invalid=10261, Unknown=0, NotChecked=0, Total=13340 [2018-09-23 19:48:18,470 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 116 states. [2018-09-23 19:48:21,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:21,945 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-09-23 19:48:21,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 19:48:21,946 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 154 [2018-09-23 19:48:21,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:21,946 INFO L225 Difference]: With dead ends: 236 [2018-09-23 19:48:21,946 INFO L226 Difference]: Without dead ends: 157 [2018-09-23 19:48:21,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4847 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5378, Invalid=18184, Unknown=0, NotChecked=0, Total=23562 [2018-09-23 19:48:21,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-23 19:48:21,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-23 19:48:21,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-23 19:48:21,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-09-23 19:48:21,979 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-09-23 19:48:21,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:21,979 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-09-23 19:48:21,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-23 19:48:21,980 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-09-23 19:48:21,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-23 19:48:21,980 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:21,980 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-09-23 19:48:21,980 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:21,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:21,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1034359663, now seen corresponding path program 74 times [2018-09-23 19:48:21,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:21,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:21,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:21,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:21,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:22,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:22,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:22,706 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:48:22,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:48:22,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:22,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:22,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:22,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-09-23 19:48:22,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:48:22,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:48:22,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:48:22,894 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-09-23 19:48:23,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:23,816 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-09-23 19:48:23,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 19:48:23,817 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-09-23 19:48:23,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:23,818 INFO L225 Difference]: With dead ends: 165 [2018-09-23 19:48:23,818 INFO L226 Difference]: Without dead ends: 163 [2018-09-23 19:48:23,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:48:23,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-23 19:48:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-09-23 19:48:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-23 19:48:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-09-23 19:48:23,860 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-09-23 19:48:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:23,860 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-09-23 19:48:23,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:48:23,860 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-09-23 19:48:23,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-23 19:48:23,861 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:23,861 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-09-23 19:48:23,861 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:23,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:23,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1882257523, now seen corresponding path program 75 times [2018-09-23 19:48:23,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:23,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:23,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:23,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:23,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:26,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:26,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:26,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:48:26,277 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-23 19:48:26,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:26,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:28,654 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:28,654 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 118 [2018-09-23 19:48:28,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-23 19:48:28,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-23 19:48:28,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3238, Invalid=10804, Unknown=0, NotChecked=0, Total=14042 [2018-09-23 19:48:28,655 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 119 states. [2018-09-23 19:48:32,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:32,252 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2018-09-23 19:48:32,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 19:48:32,252 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 158 [2018-09-23 19:48:32,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:32,253 INFO L225 Difference]: With dead ends: 242 [2018-09-23 19:48:32,253 INFO L226 Difference]: Without dead ends: 161 [2018-09-23 19:48:32,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5111 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5656, Invalid=19150, Unknown=0, NotChecked=0, Total=24806 [2018-09-23 19:48:32,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-23 19:48:32,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-23 19:48:32,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-23 19:48:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-09-23 19:48:32,286 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2018-09-23 19:48:32,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:32,286 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-09-23 19:48:32,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-23 19:48:32,287 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-09-23 19:48:32,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-23 19:48:32,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:32,287 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-09-23 19:48:32,288 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:32,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:32,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1109870791, now seen corresponding path program 76 times [2018-09-23 19:48:32,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:32,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:32,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:32,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:32,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:33,144 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:33,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:33,153 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:48:33,245 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:48:33,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:33,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:33,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:33,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-09-23 19:48:33,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:48:33,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:48:33,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:48:33,345 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 45 states. [2018-09-23 19:48:34,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:34,474 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-09-23 19:48:34,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 19:48:34,475 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 160 [2018-09-23 19:48:34,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:34,476 INFO L225 Difference]: With dead ends: 169 [2018-09-23 19:48:34,476 INFO L226 Difference]: Without dead ends: 167 [2018-09-23 19:48:34,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2669, Invalid=4471, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:48:34,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-23 19:48:34,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2018-09-23 19:48:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-23 19:48:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-09-23 19:48:34,518 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-09-23 19:48:34,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:34,518 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-09-23 19:48:34,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:48:34,518 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-09-23 19:48:34,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-23 19:48:34,519 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:34,519 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-09-23 19:48:34,519 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:34,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:34,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1433873987, now seen corresponding path program 77 times [2018-09-23 19:48:34,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:34,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:34,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:34,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:34,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:36,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:36,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:36,551 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:48:36,697 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-23 19:48:36,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:36,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:39,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:39,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 121 [2018-09-23 19:48:39,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-23 19:48:39,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-23 19:48:39,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3401, Invalid=11361, Unknown=0, NotChecked=0, Total=14762 [2018-09-23 19:48:39,267 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 122 states. [2018-09-23 19:48:43,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:43,006 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-09-23 19:48:43,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 19:48:43,006 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 162 [2018-09-23 19:48:43,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:43,007 INFO L225 Difference]: With dead ends: 248 [2018-09-23 19:48:43,007 INFO L226 Difference]: Without dead ends: 165 [2018-09-23 19:48:43,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5382 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5941, Invalid=20141, Unknown=0, NotChecked=0, Total=26082 [2018-09-23 19:48:43,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-23 19:48:43,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-23 19:48:43,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-23 19:48:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-09-23 19:48:43,043 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-09-23 19:48:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:43,043 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-09-23 19:48:43,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-23 19:48:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-09-23 19:48:43,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-23 19:48:43,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:43,044 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-09-23 19:48:43,045 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:43,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:43,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1292352899, now seen corresponding path program 78 times [2018-09-23 19:48:43,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:43,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:43,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:43,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:43,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:43,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:43,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:43,844 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:48:43,990 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-09-23 19:48:43,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:43,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:44,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:44,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-09-23 19:48:44,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:48:44,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:48:44,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:48:44,153 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-09-23 19:48:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:45,351 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2018-09-23 19:48:45,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 19:48:45,351 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-09-23 19:48:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:45,352 INFO L225 Difference]: With dead ends: 173 [2018-09-23 19:48:45,353 INFO L226 Difference]: Without dead ends: 171 [2018-09-23 19:48:45,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2797, Invalid=4685, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:48:45,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-23 19:48:45,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2018-09-23 19:48:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-23 19:48:45,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-09-23 19:48:45,394 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2018-09-23 19:48:45,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:45,394 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-09-23 19:48:45,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:48:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-09-23 19:48:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-23 19:48:45,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:45,395 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-09-23 19:48:45,395 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:45,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:45,396 INFO L82 PathProgramCache]: Analyzing trace with hash -705654151, now seen corresponding path program 79 times [2018-09-23 19:48:45,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:45,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:45,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:45,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:45,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:47,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:47,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:47,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:47,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:50,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:50,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 124 [2018-09-23 19:48:50,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-23 19:48:50,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-23 19:48:50,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3568, Invalid=11932, Unknown=0, NotChecked=0, Total=15500 [2018-09-23 19:48:50,441 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 125 states. [2018-09-23 19:48:54,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:54,281 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2018-09-23 19:48:54,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-23 19:48:54,282 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 166 [2018-09-23 19:48:54,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:54,282 INFO L225 Difference]: With dead ends: 254 [2018-09-23 19:48:54,283 INFO L226 Difference]: Without dead ends: 169 [2018-09-23 19:48:54,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5660 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=6233, Invalid=21157, Unknown=0, NotChecked=0, Total=27390 [2018-09-23 19:48:54,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-23 19:48:54,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-23 19:48:54,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-23 19:48:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-09-23 19:48:54,323 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2018-09-23 19:48:54,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:54,324 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-09-23 19:48:54,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-23 19:48:54,324 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-09-23 19:48:54,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-23 19:48:54,325 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:54,325 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-09-23 19:48:54,325 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:54,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:54,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1476855373, now seen corresponding path program 80 times [2018-09-23 19:48:54,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:54,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:54,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:54,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:54,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:55,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:55,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:55,463 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:48:55,564 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:48:55,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:55,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:55,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:55,654 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-09-23 19:48:55,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:48:55,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:48:55,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:48:55,655 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 47 states. [2018-09-23 19:48:56,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:56,654 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2018-09-23 19:48:56,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-23 19:48:56,654 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 168 [2018-09-23 19:48:56,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:56,655 INFO L225 Difference]: With dead ends: 177 [2018-09-23 19:48:56,655 INFO L226 Difference]: Without dead ends: 175 [2018-09-23 19:48:56,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2928, Invalid=4904, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:48:56,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-23 19:48:56,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2018-09-23 19:48:56,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-23 19:48:56,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-09-23 19:48:56,692 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-09-23 19:48:56,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:56,693 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-09-23 19:48:56,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:48:56,693 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-09-23 19:48:56,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-23 19:48:56,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:56,693 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-09-23 19:48:56,693 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:56,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:56,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1918872529, now seen corresponding path program 81 times [2018-09-23 19:48:56,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:56,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:56,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:56,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:56,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:58,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:58,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:48:58,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:48:59,101 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-23 19:48:59,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:59,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:02,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:02,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 127 [2018-09-23 19:49:02,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-23 19:49:02,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-23 19:49:02,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3739, Invalid=12517, Unknown=0, NotChecked=0, Total=16256 [2018-09-23 19:49:02,084 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 128 states. [2018-09-23 19:49:05,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:05,427 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2018-09-23 19:49:05,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 19:49:05,427 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 170 [2018-09-23 19:49:05,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:05,428 INFO L225 Difference]: With dead ends: 260 [2018-09-23 19:49:05,428 INFO L226 Difference]: Without dead ends: 173 [2018-09-23 19:49:05,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5945 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=6532, Invalid=22198, Unknown=0, NotChecked=0, Total=28730 [2018-09-23 19:49:05,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-23 19:49:05,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-23 19:49:05,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-23 19:49:05,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-09-23 19:49:05,465 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-09-23 19:49:05,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:05,465 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-09-23 19:49:05,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-23 19:49:05,465 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-09-23 19:49:05,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-23 19:49:05,466 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:05,466 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-09-23 19:49:05,467 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:05,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:05,467 INFO L82 PathProgramCache]: Analyzing trace with hash -900821399, now seen corresponding path program 82 times [2018-09-23 19:49:05,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:05,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:05,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:05,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:05,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:06,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:06,368 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:06,376 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:06,484 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:06,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:06,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:06,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:06,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-09-23 19:49:06,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:49:06,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:49:06,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:49:06,578 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-09-23 19:49:07,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:07,664 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-09-23 19:49:07,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 19:49:07,664 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-09-23 19:49:07,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:07,665 INFO L225 Difference]: With dead ends: 181 [2018-09-23 19:49:07,665 INFO L226 Difference]: Without dead ends: 179 [2018-09-23 19:49:07,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3062, Invalid=5128, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 19:49:07,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-23 19:49:07,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-09-23 19:49:07,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-23 19:49:07,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-09-23 19:49:07,710 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2018-09-23 19:49:07,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:07,710 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-09-23 19:49:07,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:49:07,710 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-09-23 19:49:07,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-23 19:49:07,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:07,711 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-09-23 19:49:07,712 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:07,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:07,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1893962597, now seen corresponding path program 83 times [2018-09-23 19:49:07,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:07,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:07,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:07,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:07,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:10,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:10,228 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:10,240 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:10,407 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-23 19:49:10,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:10,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:13,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:13,279 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 130 [2018-09-23 19:49:13,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-23 19:49:13,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-23 19:49:13,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3914, Invalid=13116, Unknown=0, NotChecked=0, Total=17030 [2018-09-23 19:49:13,280 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 131 states. [2018-09-23 19:49:17,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:17,594 INFO L93 Difference]: Finished difference Result 266 states and 268 transitions. [2018-09-23 19:49:17,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-23 19:49:17,595 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 174 [2018-09-23 19:49:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:17,595 INFO L225 Difference]: With dead ends: 266 [2018-09-23 19:49:17,595 INFO L226 Difference]: Without dead ends: 177 [2018-09-23 19:49:17,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6237 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=6838, Invalid=23264, Unknown=0, NotChecked=0, Total=30102 [2018-09-23 19:49:17,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-23 19:49:17,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-23 19:49:17,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-23 19:49:17,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-09-23 19:49:17,637 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2018-09-23 19:49:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:17,638 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-09-23 19:49:17,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-23 19:49:17,638 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-09-23 19:49:17,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-23 19:49:17,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:17,639 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-09-23 19:49:17,639 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:17,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:17,639 INFO L82 PathProgramCache]: Analyzing trace with hash -619306849, now seen corresponding path program 84 times [2018-09-23 19:49:17,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:17,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:17,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:17,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:17,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:18,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:18,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:18,553 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:18,713 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-09-23 19:49:18,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:18,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:18,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:18,828 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-09-23 19:49:18,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:49:18,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:49:18,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:49:18,829 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 49 states. [2018-09-23 19:49:19,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:19,910 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2018-09-23 19:49:19,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-23 19:49:19,911 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 176 [2018-09-23 19:49:19,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:19,912 INFO L225 Difference]: With dead ends: 185 [2018-09-23 19:49:19,912 INFO L226 Difference]: Without dead ends: 183 [2018-09-23 19:49:19,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3199, Invalid=5357, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 19:49:19,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-23 19:49:19,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-09-23 19:49:19,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-23 19:49:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-09-23 19:49:19,957 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-09-23 19:49:19,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:19,957 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-09-23 19:49:19,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:49:19,958 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-09-23 19:49:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-23 19:49:19,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:19,959 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-09-23 19:49:19,959 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:19,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:19,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1846505499, now seen corresponding path program 85 times [2018-09-23 19:49:19,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:19,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:19,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:19,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:19,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:22,774 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:22,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:22,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:22,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:26,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:26,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 133 [2018-09-23 19:49:26,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-23 19:49:26,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-23 19:49:26,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4093, Invalid=13729, Unknown=0, NotChecked=0, Total=17822 [2018-09-23 19:49:26,203 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 134 states. Received shutdown request... [2018-09-23 19:49:28,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:49:28,356 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:49:28,361 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:49:28,361 INFO L202 PluginConnector]: Adding new model up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:49:28 BoogieIcfgContainer [2018-09-23 19:49:28,361 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:49:28,362 INFO L168 Benchmark]: Toolchain (without parser) took 235646.28 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -41.4 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 421.9 MB). Peak memory consumption was 380.5 MB. Max. memory is 7.1 GB. [2018-09-23 19:49:28,363 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:49:28,363 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.72 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. [2018-09-23 19:49:28,364 INFO L168 Benchmark]: Boogie Preprocessor took 19.41 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. [2018-09-23 19:49:28,364 INFO L168 Benchmark]: RCFGBuilder took 360.52 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:49:28,364 INFO L168 Benchmark]: TraceAbstraction took 235223.08 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -41.4 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 400.8 MB). Peak memory consumption was 359.4 MB. Max. memory is 7.1 GB. [2018-09-23 19:49:28,368 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 37.72 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. * Boogie Preprocessor took 19.41 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. * RCFGBuilder took 360.52 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235223.08 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -41.4 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 400.8 MB). Peak memory consumption was 359.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was constructing difference of abstraction (179states) and FLOYD_HOARE automaton (currently 77 states, 134 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 165 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 235.1s OverallTime, 87 OverallIterations, 44 TraceHistogramMax, 93.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1337 SDtfs, 954 SDslu, 6460 SDs, 0 SdLazy, 63216 SolverSat, 4433 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 37.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13916 GetRequests, 7864 SyntacticMatches, 0 SemanticMatches, 6051 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127648 ImplicationChecksByTransitivity, 165.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=179occurred in iteration=86, 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: 1.5s AutomataMinimizationTime, 86 MinimizatonAttempts, 172 StatesRemovedByMinimization, 43 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 6.3s SatisfiabilityAnalysisTime, 128.8s InterpolantComputationTime, 15994 NumberOfCodeBlocks, 15994 NumberOfCodeBlocksAsserted, 1145 NumberOfCheckSat, 15822 ConstructedInterpolants, 0 QuantifiedInterpolants, 7016384 SizeOfPredicates, 255 NumberOfNonLiveVariables, 31536 ConjunctsInSsa, 4206 ConjunctsInUnsatCore, 172 InterpolantComputations, 2 PerfectInterpolantSequences, 113518/223254 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/up.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-49-28-376.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/up.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-49-28-376.csv Completed graceful shutdown